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Daminov, O., O. Khushnaev, A. Yangibaev i G. Kucharenok. "IMPROVING THE PERFORMANCE INDICATORS OF DIESEL ENGINES BY ENHANCING THE COOLING SYSTEM". Technical science and innovation 2020, nr 1 (31.03.2020): 63–68. http://dx.doi.org/10.51346/tstu-01.20.1-77-0052.
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The article deals with the improvement of the performance of diesel engines by improving the cooling system. It is indicated that there is a number of problems that arise when converting an engine with spark ignition to natural gas. The increase of thermal stress of the engine is illustrated. As a result of researching of features of the parameters and characteristics of a gas-powered automobile engine and optimization of its temperature regime, a very actual scientific and practical task is determined. The engine with the spark ignition installed on the microbus working on the diesel and gas is presented. The results of the spark-ignition engine research on gaseous fuel are presented. The following recommendations are given: to analyze the design features of gas engines; analyze the principles of operation of modern engine cooling systems; to conduct a theoretical study of the engine cooling system of gas buses and minibuses, which would allow to identify the causes leading to an increase in the thermal stress of engine parts when converted to gas fuel, which consists in the specificity and features of the working process; suggest ways to improve the cooling system of gas engines; to develop and propose options for improving the cooling system of gas engines, which will reduce the cooling temperature from 120 to 90 °C.
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Haryadi, Setyo, Dena Hendriana, Henry Nasution i Gembong Baskoro. "Monitoring of Thermostat Performance In Heavy Equipment Diesel Engine Cooling System Using An Ultrasonic Flow Meter". Proceedings of The Conference on Management and Engineering in Industry 2, nr 1 (23.11.2020): 26–30. http://dx.doi.org/10.33555/cmei.v2i1.39.
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Heavy equipment uses diesel engines as the main power source. Common problem in diesel engines is engine overheat condition and the cause of this problem can come from thermostat failure. Diagnosis of the thermostat when problem occurs in the diesel engine cooling system requires a long time. This study aims to determine the condition of the coolant flow and monitor thermostat performance while engine is running so thermostat failure can be detected earlier. In this study, an ultrasonic flow meter to measure coolant flow rate in the diesel engine cooling system was developed and the measurement is displayed for monitoring the condition of thermostat. The monitoring system has been installed and the results showed significant relationship between the coolant flow rate and the performance of the thermostat. This monitoring system can show that when the thermostat is in normal condition and when the coolant temperature reaches 80oC, it is detected that the coolant flow rate from the engine block to the radiator increases significantly.
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Zhang, Junhong, Zhexuan Xu, Jiewei Lin, Zefeng Lin, Jingchao Wang i Tianshu Xu. "Thermal Characteristics Investigation of the Internal Combustion Engine Cooling-Combustion System Using Thermal Boundary Dynamic Coupling Method and Experimental Verification". Energies 11, nr 8 (15.08.2018): 2127. http://dx.doi.org/10.3390/en11082127.
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The engine cooling system must be able to match up with the stable operating conditions so as to guarantee the engine performance. On the working cycle level, however, the dynamic thermo-state of engines has not been considered in the cooling strategy. Besides, the frequent over-cooling boiling inside the gallery changes the cooling capacity constantly. It is necessary to study the coupling effect caused by the interaction of cooling flow and in-cylinder combustion so as to provide details of the dynamic control of cooling systems. To this end, this study develops a coupled modeling scheme of the cooling process considering the interaction of combustion and coolant flow. The global reaction mechanism is used for the combustion process and the multiphase flow method is employed to simulate the coolant flow considering the wall boiling and the interphase forces. The two sub-models exchange information of in-cylinder temperature, heat transfer coefficient, and wall temperature to achieve the coupled computation. The proposed modeling process is verified through the measured diesel engine power, in-cylinder pressure, and fire surface temperature of cylinder head. Then the effects of different cooling conditions on the cyclic engine performances are analyzed and discussed.
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Goyal, Nupur, Ajay Kaushik i Mangey Ram. "Automotive Water Cooling System Analysis Subject to Time Dependence and Failure Issues". International Journal of Manufacturing, Materials, and Mechanical Engineering 6, nr 2 (kwiecień 2016): 1–22. http://dx.doi.org/10.4018/ijmmme.2016040101.
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In an automobile engine, the heat transfer cannot be possible without cooling system support. The cooling system has a great importance in the engines. It coolants overheat of the engine, and prevents it from breakdown, that's why a highly reliable cooling system is the necessity of every engine but there are many failure issues with a cooling system which are time dependent. This paper investigates the performance of a water cooling system with the consideration of their significant components by taking the attention of three types of time dependent failure issues while the water cooling system is maintained by the sufficient repair facility. It is obvious that in the lack of maintenance, failure issues in water cooling system lead with the increment of time. Maintenance and operating costs of water cooling system affect the economy of overall engine very much, so, it is necessary to be aware about overheating of engines during peak ambient conditions when it is operated with full capacity. Hence, a Mathematical model of water cooling system is proposed by using the Markov process and supplementary variable technique.
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Radchenko, Andrii, Mykola Radchenko, Andrii Konovalov i Anatolii Zubarev. "Increasing electrical power output and fuel efficiency of gas engines in integrated energy system by absorption chiller scavenge air cooling on the base of monitoring data treatment". E3S Web of Conferences 70 (2018): 03011. http://dx.doi.org/10.1051/e3sconf/20187003011.
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An advanced scavenge air cooling system for reciprocating gas engines of integrated energy system for combined electricity, heat and refrigeration generation has been developed. New method of deep scavenge air cooling and stabilizing its temperature at increased ambient air temperatures and three-circuit scavenge air cooling system with absorption lithium-bromide chiller and wet-type cooling tower was proposed. Such cooling method does not require essential constructive changes in the existing scavenge air cooling system but only an addition heat exchanger for chilling scavenge air cooling water of scavenge air low-temperature intercooler closed contour by absorption chiller. A chilled water from absorption chiller is used as a coolant. To evaluate the effect of gas engine scavenge air deeper cooling compared with its typical radiator cooling, data on the dependence of fuel consumption and power output of gas engine on ambient air temperature at the inlet of the radiator are analized. The efficiency of engine scavenge air deep cooling at increased ambient air temperatures was estimated by reducing the gas fuel consumption compared with radiator cooling.
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Radchenko, Andrii, Ionut-Cristian Scurtu, Mykola Radchenko, Serhiy Forduy i Anatoliy Zubarev. "Monitoring the efficiency of cooling air at the inlet of gas engine in integrated energy system". Thermal Science, nr 00 (2020): 344. http://dx.doi.org/10.2298/tsci200711344r.
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The fuel efficiency of gas engines is effected by the temperature of intake air at the suction of turbocharger. The data on dependence of fuel consumption and engine electric power on the intake air temperature were monitored for Jenbacher gas engine JMS 420 GS-N.LC to evaluate its influence. A waste heat of engine is rejected for heating water to the temperature of about 90??. The heat received is used in absorption lithium-bromide chiller to produce a cold in the form of chilled water. A cooling capacity of absorption chiller firstly is spent for technological needs and then for feeding the central air conditioner for cooling the ambient air incoming the engine room, from where the air is sucked by the engine turbocharger. The monitoring data revealed the reserves to enhance the efficiency of traditional cooling system of intake air by absorption chiller through deeper cooling. This concept can be realized in two ways: by addition cooling a chilled water from absorption chiller to about 5-7?? for feeding engine intake air cooler or by two-stage cooling with precooling ambient air by chilled water from ACh in the first stage and subsequent deep cooling air to the temperatures 7-10?? in the second stage of intake air cooler by using a refrigerant as a coolant. In both cases the ejector chiller could be applied as the most simple in design.
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Altaf, Khurram, Masri Baharom, A. Rashid A. Aziz, Junaid A. Qayyum i Mirza Jahanzaib. "Rapid Prototyping of a Customized Cooling System for a Novel Crank Rocker Engine". International Journal of Engineering & Technology 7, nr 3.17 (1.08.2018): 90. http://dx.doi.org/10.14419/ijet.v7i3.17.16628.
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A novel internal combustion engine termed as Crank Rocker Engine has been developed at Universiti Teknologi PETRONAS (UTP) Malaysia. In the existing design, the engine cylinder is cooled through forced convection which is not efficient and malfunctioning of cooling system could lead to engine overheating. The objective of the current study is to develop a concept of an integrated and customized cooling system for the Crank-Rocker engine and to develop through rapid prototyping (RP). The proposed cooling system comprises of an integrated cooling water jacket around the engine cylinder, which works on the principle of forced convection. The forced convection is energy intensive and not suitable for stationary engines. Therefore, an enhanced design of the cooling system is required to improve the overall performance of the engine. Since the engine cylinder is curved, the conventional manufacturing technologies could be difficult to apply for the development of cooling system. For swift, precise and economic development as well as performance analysis of the cooling system, RP technique could be promising. In the present study, a customized and modified cooling system has been designed and developed through fused deposition modelling (FDM), an efficient RP technology. Design for additive manufacturing (DFAM) is applied to mitigate development time and support structures of the cooling system. The design is proposed by keeping in view the cooling performance and manufacturability.
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Lunyaka, K., O. Kliuiev, S. Rusanov i O. Kliuieva. "THE RESEARCH OF THE WORK OF THE HEAT ACCUMULATOR OF THE PRE-STARTING SYSTEM OF WORMING UP OF THE INTERNAL COMBUSTION ENGINE". Thermophysics and Thermal Power Engineering 42, nr 3 (1.06.2020): 76–83. http://dx.doi.org/10.31472/ttpe.3.2020.9.
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Problem statement. Starting internal combustion engines for a large car fleet at ambient temperature of less than 5 ºС requires considerable time; it leads to increased wear of the components of the connected engine pairs, increased fuel consumption during start-up and warm-up and increased emissions of harmful substances into the atmosphere with exhaust fumes. Therefore, prestart warming up of car engines is given great attention.
Actual scientific researches and issues analysis
Recently, this problem has been solved by using heat accumulators, moreover, heat accumulators with heat storage material of a phase transition are given preference.
The engine exhaust gases (temperature 600-700 ºС) or the engine cooling liquid (water, tosol cooling agent) are used as a heat transfer agent. Given the negative impact of high temperatures on the heat storage material, the metal of the heat storage structure and overheating (boiling) of the engine coolant, the first way has certain disadvantages. In this regard, we consider it more promising to use a liquid cooling engine as a coolant for a heat accumulator. High temperatures have no positive affect on the heat storage material, the metal of the heat storage structure and these are a cause for boiling a coolant –cooler of the engine. In this regard, we consider more promising to use a cooling fluid of the heat accumulator as a heat transfer agent.
The aim of this work is to develop a new design of a heat accumulator for pre-starting warming up of a car engine, to make the experimental installation to research its work and conducting researches in order to find the time of charging and discharging of the heat accumulator, to construct operating modes during charging and discharging, to determine the necessary mass of the heat-accumulating material and the battery size.
Base material
The experimental installation was a closed system: the heat accumulator — a passage of the VAZ 2109 car engine cooling system. Taking into account the work peculiarities of the heat accumulator in the cooling system of the car engine, unlike other areas where all mass of the heat storage material constantly is in contact with the substance which the heat storage material giving up heat, in our case, the engine cooling liquid is located in the heat accumulator and in the cooling jacket. They mixes before starting the engine, while its temperature decreases. The time of charging and staying of the heat accumulator in the charged state has been determined, the operating modes during charging and discharging have been constructed, the necessary mass of the heat-accumulating material and the battery size has been determined.
Conclusions
The experimental model of the heat accumulator of the pre-starting system of worming up of the engine of the car has been developed. This experimental model is included in a closed circuit with engine cooling system. On the model the researches of charging and discharging process of the heat accumulator have been conducted. The required time for these processes has been determined and on this basis the modes of operation of the heat accumulator - engine cooling system have been constructed. The temperatures of tosol cooling agent in the cooling system were calculated and it allowed finding mass (volume) of heat storage material of the heat accumulator and it served as the basis for determining the size of the heat accumulator.
Establishment of a computerized control system on/off control of the heat accumulator in order to maintain the desired temperature of the engine coolant liquid using of heat storage material of phase transition and controlling this system using supplements to phones.
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Pokusaev, Mikhail Nikolaevich, Alexei Viktorovich Trifonov i Vasiliy Aleksandrovich Kostyrenko. "TESTING PLANT FOR ENGINE WITH ENERGY EFFICIENT COOLING SYSTEM". Vestnik of Astrakhan State Technical University 2021, nr 1 (31.05.2021): 15–21. http://dx.doi.org/10.24143/1812-9498-2021-1-15-21.
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The article focuses on developing a new testing system for the Iveco 8041I06 55 R900 engine in the laboratory “Marine Diesels” under Astrakhan state technical university in the event of modernizing the test benches with ship engines. There has been considered creating an ex-perimental unit for conducting heat-balance tests of a marine engine using modern measurement and control tools. The unit consists of a converted engine powered by a generator. The engine will be tested according to the generator characteristic. There is given the data on the main technical parameters of the tested engine and on the potential configuration of the instrument base. As a load for the generator, it is planned to use a resistive load device. A fuel micro-meter will be used to measure the fuel consumption. Flow meters are selected for measuring the flow rates. Heat carriers and temperature sensors are selected for measuring temperature of the exhaust gases. The parameters of the engine under consideration are compared with the requirements of the Russian River Register for marine engines. The scope of work on converting an industrial engine into a marine engine in terms of the modernization of the cooling system has been described. The unit is designed to study the ship's cooling system operation, in which the control is carried out by changing the speed of the suspended pump depending on the temperature of the seawater. There was selected
a pump and a device to regulating its rotating speed. The positive effect is achieved by reducing the power consumed by the pump. It saves the fuel and reduces the environmental damage due to the lower carbon dioxide emissions
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Cortona, E., C. H. Onder i L. Guzzella. "Engine thermomanagement with electrical components for fuel consumption reduction". International Journal of Engine Research 3, nr 3 (1.06.2002): 157–70. http://dx.doi.org/10.1243/14680870260189271.
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This paper proposes a solution for advanced temperature control of the relevant temperature of a combustion engine. It analyses the possibility of reducing vehicle fuel consumption by improving engine thermomanagement. In conventional applications, combustion engine cooling systems are designed to guarantee sufficient heat removal at full load. The cooling pump is belt-driven by the combustion engine crankshaft, resulting in a direct coupling of engine and cooling pump speeds. It is dimensioned such that it can guarantee adequate performance over the full engine speed range. This causes an excessive flow of cooling fluid at part-load conditions and at engine cold-start. This negatively affects the engine efficiency and, as a consequence, the overall fuel consumption. Moreover, state-of-the-art cooling systems allow the control of the coolant temperature only by expansion thermostats (solid-to-liquid phase wax actuators). The resulting coolant temperature does not permit engine efficiency to be optimized. In this paper, active control of the coolant flow as well as of the coolant temperature has been realized using an electrical cooling pump and an electrically driven valve which controls the flow distribution between the radiator and its bypass. For this purpose, a control-oriented model of the whole cooling system has been derived. Model-based feedforward and feedback controls of coolant temperature and flow have been designed and tested. With the additional actuators and the model-based control scheme, a good performance in terms of fast heat-up and small temperature overshoot has been achieved. The improvements in fuel consumption obtained with the proposed configuration have been verified on a dynamic testbench. Both engine cold-start under stationary engine operation and the European driving cycle MVEG-A with engine cold-start were tested. The fuel consumption reductions achieved during these tests vary between 2.8 and 4.5 per cent, depending on the engine operating conditions. Compared to vehicle mass reduction or internal engine improvements, engine thermomanagement is a simple, flexible and cost efficient solution for improving system performance, i.e. fuel consumption.
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WORSZTYNOWICZ, Barbara. "Influence of the method of implementing the forced air flow through the cooling system on the temperature of the coolant in heavy-duty engines". Combustion Engines 171, nr 4 (1.11.2017): 51–55. http://dx.doi.org/10.19206/ce-2017-409.
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The article discusses the problem how forced air flow is implemented through the cooling module of heavy-duty engines. The kinematic connection between the coolant pump and the crankshaft of the engine, results in the fact that the pump performance often does not correspond to the engine demand at its part load. In conjunction with the fan drive method, the temperature of the coolant may be too low or too high for part load. The study was carried out in order to calculate the parameters of the cooling system in heavy-duty engines for maximum power and maximum torque, taking into account a mechanical fan drive, a hydraulic fan drive and an electric fan drive.
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Chen, Xiao Jie. "Simulation Research of Engine Cooling System". Advanced Materials Research 442 (styczeń 2012): 224–28. http://dx.doi.org/10.4028/www.scientific.net/amr.442.224.
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The engine cooling system is very important for engine working efficiently. Using AMEsim software to simulate the cooling system can make it easily and clearly. So the simulation system is built. The engine cooling system structure is given first, and the model followed. The influence of the heat component and the fan operating is studied also. Through the analysis of the cooling system, we know that with the help of fan, the system can get additional air in the radiator and make the temperature decrease onsequently. This is very useful to make engine working in high performance.
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Gou, Yun Jun, i Xiao Hui Zhong. "Heat Transfer Simulation and Optimization of Cooling System for Micro Wankel Engines". Advanced Materials Research 490-495 (marzec 2012): 1237–40. http://dx.doi.org/10.4028/www.scientific.net/amr.490-495.1237.
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A jet cooling system is designed for micro Wankel engines in laboratory environment. The heat transfer on the wall of engine is simulated with FLUENT, from the simulation results we can see that the cooling effect of jet cooling system is good, it can meet the needs of wall temperature. This paper is helpful for the cooling of micro engines in laboratory environment.
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Cai, De Hong, Cheng Qin Ren i Jing Ping Liu. "The Coupled Simulation Research on Engine Cooling System". Advanced Materials Research 516-517 (maj 2012): 457–62. http://dx.doi.org/10.4028/www.scientific.net/amr.516-517.457.
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Abstract: With the help of field experiments, a 1-D/3-D coupled simulation model between automo-tive engine cooling systems and engine cabin is established. Through these experiments and coupled simulations, the influence of engine cabin on the performance of engine cooling system and thermal flow field has been analyzed, and convective heat transfer coefficients on the engine surface which contacted with engine cabin’s thermal flow field have been summarized. These heat transfer coeffi-cients provide basic arguments for developing engine cooling system efficiently.
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Palej, Patryk, i Tomasz Palacz. "Preliminary Design Analysis of Regenerative Cooling for N2O/Alcohol Small Scale Liquid Rocket Engine". Transactions on Aerospace Research 2018, nr 3 (1.09.2018): 87–102. http://dx.doi.org/10.2478/tar-2018-0024.
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Abstract This paper presents a concept of a small scale liquid-propellant rocket engine designed in AGH Space Systems for sounding rocket. During preliminary design of thermal aspects various ways of cooling were evaluated and described. Possible issues and design approaches for ablative, radiation and regenerative cooling are raised. The authors describe available solutions. Regenerative cooling is especially concerned as it is most popular solution in bi-liquid engines, in which alcohol fuel acts as coolant and is preheated before it reaches combustion chamber. To estimate a possible temperature distribution - and thus an applicability of such a system in the engine - a mathematical model of heat transfer was developed. Unique element of said engine is its oxidizer - nitrous oxide, which have been rarely used to date. Comparison between typical LOX bi-liquids is given and major differences that affect cooling arrangement are discussed. The authors compared different combinations of coolants, fuel/oxidizer ratios etc. to optimize the temperature distribution which is a key factor for the engine performance.
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Chang, He, Xiu Min Yu, Xian Qu, Wen Chao Zhang, Pin Sun i Wei Dong. "Energy and Distribution Analysis on Engine Bench". Applied Mechanics and Materials 472 (styczeń 2014): 301–5. http://dx.doi.org/10.4028/www.scientific.net/amm.472.301.
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Engine is carried the test on the thermal balance test and the drag test in the vehicle working condition to analysis the distribution of energy from combustion. The heat of coolant that combustion flow into the cooling system in different temperature is not the same. The results show that the engine heat comes into the cooling system ranging minimum at 3000-4000r/min, the effective power output accounts for the total energy up to 25% at full load reaching the maximum. Based on the data, it is established the control system of engine cooling module that can be controlled by the engine speed, torque and power, when the ECU reads the signal to forecast the combustion energy flow to the cooling system in the target vehicle working conditions establish the cooling module heat release control system.
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Sun, Zuo Yu, Xiang Rong Li, Liang Ping Guo i Xue Yan Zhang. "Research on the Multi-Parameters Matching Control of the Cooling System for the Diesel Engine on the Numerical Simulation Technology". Advanced Materials Research 383-390 (listopad 2011): 1423–30. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.1423.
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For the growing importance of future emission restrictions and the expanding requirement for a better fuel economy, the internal combustion engines are forced to be improved for the high strengthening direction. However, the heat loads of the engine is increasing according to the increasing of engine speed and power density, hence, the cooling system is faced to more challenge. For the cooling system is one of the key system which has more effect on the engine efficiency, fuel economy, and exhaust heats; optimize the matching control cooling system becomes one of the key technology to improve the engine performance. In this paper, several overall schemes of the cooling system are analyzed and discussed, and then one design scheme is determined to the optimal for the current diesel engine. A whole engine system is established by the software GT-Power, and the cooling system in the engine system is established by GT-Cool based on the above optimal scheme. During the simulation, the influence on the heat dissipating capability brought by the control parameters, injection advance angle, power, and torque are investigated. At last, the requirement of the heat released under full conditions is analyzed, and the relationship of the fuel consumption and the control parameters is investigated.
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Sun, Zuo Yu, Xiang Rong Li, Liang Ping Guo i Xue Yan Zhang. "Research on the Multi-Parameters Matching Control of the Cooling System for the Diesel Engine on the Numerical Simulation Technology". Advanced Materials Research 433-440 (styczeń 2012): 2670–79. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.2670.
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For the growing importance of future emission restrictions and the expanding requirement for a better fuel economy, the internal combustion engines are forced to be improved for the high strengthening direction. However, the heat loads of the engine is increasing according to the increasing of engine speed and power density, hence, the cooling system is faced to more challenge. For the cooling system is one of the key system which has more effect on the engine efficiency, fuel economy, and exhaust heats; optimize the matching control cooling system becomes one of the key technology to improve the engine performance. In this paper, several overall schemes of the cooling system are analyzed and discussed, and then one design scheme is determined to the optimal for the current diesel engine. A whole engine system is established by the software GT-Power, and the cooling system in the engine system is established by GT-Cool based on the above optimal scheme. During the simulation, the influence on the heat dissipating capability brought by the control parameters, injection advance angle, power, and torque are investigated. At last, the requirement of the heat released under full conditions is analyzed, and the relationship of the fuel consumption and the control parameters is investigated.
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Zbigniew, Kneba, i Michał Śmieja. "The Automation of Test Stand for Engine Cooling System Testing". Solid State Phenomena 164 (czerwiec 2010): 61–66. http://dx.doi.org/10.4028/www.scientific.net/ssp.164.61.
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Koenhardono, Eddy Setyo. "Performance Improvement of Hopper Cooling System on Traditional Fishing Boats Due to Excessive Cooling". Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan 17, nr 2 (3.06.2020): 58–64. http://dx.doi.org/10.14710/kapal.v17i2.29496.
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The engine cooling system that drives traditional fishing boats uses a hopper cooler type system that experiences excessive cooling. Ideally, the temperature of the cooling water in the hopper should be approximately 70-80°C. The fact, it is only 42°C, thus reducing the effective power generated by the engine. This excessive cooling may cause an increase in fuel consumption and emissions. One method to reduce excessive cooling is to increase the temperature of the cooling media in the hopper. The author has conducted a simple experiment on a traditional fishing boat in Kenjeran, Surabaya, by installing a valve to control the flow of seawater entering the hopper. However, the use of seawater as a cooling medium has a maximum operating temperature limitation, so there is no precipitation of salt and lime, which is 50oC. At this temperature, the benefits are not large, only an increase in speed of 4.4% and a fuel reduction of 4.3%. Therefore, the existing seawater cooling system must be modified to an indirect seawater cooling system to get optimum performance improvement. The re-modification allows the temperature of the freshwater in the hopper to be maintained at 80°C, so that the speed of the fishing boat may increase by 14%, with a fuel savings of 12.3%.
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Chen, Guo Jin, Zhong Min Liu, Ting Ting Liu, Shao Hui Su, Guang Jie Yuan i Yi Jiang Cao. "Study on Matching and Optimization of Low-Speed Diesel Engine’s Cooling System". Applied Mechanics and Materials 148-149 (grudzień 2011): 71–74. http://dx.doi.org/10.4028/www.scientific.net/amm.148-149.71.
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Aiming at the high-power low-speed marine diesel engine, the paper analyzes the impact of the diesel engine’s cooling to the power, economy and NOx’s emission, studies the variable flow control method and system of the diesel engine cooling water and proposes the scheme setting up the intercooler system and the body cooling system independently in the diesel engine. The results show that the methods and systems are better to improve the engine power, reduce the fuel consumption and NOx’s emission.
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Andrey, Ermakov, Salakhov Rishat, Khismatullin Renat i Idiatullin Bulat. "Development and Research of the Adaptive Cooling System with an Electric Pump". International Journal of Heat and Technology 39, nr 2 (30.04.2021): 638–42. http://dx.doi.org/10.18280/ijht.390235.
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This paper studies the effect of the electrically-driven pump on improving the efficiency of internal combustion engine cooling systems. Numerical one-dimensional simulation of the system operation was performed according to the European transient cycle (ETC). The paper compares the cooling system with a belt-driven pump and electrically-driven pump. It was found that the electrically-driven cooling system not only could maintain a more stable coolant temperature, and also provided energy savings for the pump drive. It can be noted that the mechanically-driven cooling system has disproportionately high energy costs, unstable coolant temperature, so in case of sudden changes in operating modes, the built-in thermostat cannot keep it within two degrees Celsius. At high engine speeds and low load, the drive consumes too much power, and when thermostat is faulty and the coolant is overcooled, at low speeds and high load, the coolant is overheating. The paper also considers options with electric-driven pump with and without an enabled thermostat. With a working thermostat and electrically driven pump, the system consumes a little more energy, because the thermostat does not open fully and as a result, the pump speed is 8.2% higher than in a cooling system without a thermostat.
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Фордуй, Сергій Георгійович, Андрій Миколайович Радченко, Анатолій Анатолійович Зубарєв, Володимир Володимирович Бойчук i Олексій Валерійович Остапенко. "РЕЗЕРВИ ПІДВИЩЕННЯ ЕФЕКТИВНОСТІ ТРАНСФОРМАЦІЇ ТЕПЛОТИ УСТАНОВКИ АВТОНОМНОГО ЕНЕРГОЗАБЕЗПЕЧЕННЯ". Aerospace technic and technology, nr 4 (31.08.2019): 25–30. http://dx.doi.org/10.32620/aktt.2019.4.05.
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It is analyzed the efficiency of heat conversion in the integrated electricity, heat and cooling supply of the enterprise. The installation for energy supply includes two JMS 420 GS-N.LC GE Jenbacher cogeneration gas engines manufactured as cogeneration modules with heat exchangers for removing the heat of exhaust gases, scavenge gas-air mixture, cooling water of engine and lubricating oil. The heat of hot water is transformed by the absorption lithium-bromide chiller AR-D500L2 Century into the cold, which is spent on technological needs and for the operation of the central air conditioner for cooling the incoming air of the engine room, where from it is sucked by the turbocharger of the engine. The presence of significant heat losses, which account for about 30% of the total heat removed from the cogeneration gas piston module and is due to the inconsistency of the joint operation modes of the absorption lithium-bromide chiller and the gas piston engine, was revealed. This inconsistency is caused by the contradictory conditions of their effective operation according to the temperature of the return coolant at the outlet of the absorption lithium-bromide chiller and the entrance to the engine cooling system. The thermal state of the gas piston engine is ensured by maintaining the temperature of the return coolant at the entrance to it is not higher than 70 °C. At the same time, during the transformation of the heat of the coolant into the cold in an absorption lithium-bromide chiller, the temperature decreasing in the machine is no more than 10 ... 15 °С, that is, up to 75 ... 80 °С, if the temperature of the heat coolant outlet from the cogeneration gas piston module, i.e. at the inlet of the absorption lithium-bromide chiller, 90 °С. Therefore, the return coolant is additionally cooled in the "emergency heat release" radiator by removing its heat into surroundings. It is shown the possibility of increasing the cooling capacity of the system by conversion of the return coolant exhaust heat into cold in absorption lithium-bromide and ejector chillers through the data procession of monitoring the heat conversion system in the integrated energy plant.
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Faruoli, Maria, Annarita Viggiano, Paolo Caso i Vinicio Magi. "A Numerical Analysis of the Air-Cooling System of a Spark Ignition Aeronautical Engine". E3S Web of Conferences 197 (2020): 06003. http://dx.doi.org/10.1051/e3sconf/202019706003.
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It is well known that spark ignition internal combustion engines for aeronautical applications operate within a specific temperature range to avoid structural damages, detonations and loss of efficiency of the combustion process. An accurate assessment of the cooling system performance is a crucial aspect in order to guarantee broad operating conditions of the engine. In this framework, the use of a Conjugate Heat Transfer method is a proper choice, since it allows to estimate both the heat fluxes between the engine walls and the cooling air and the temperature distribution along the outer wall surfaces of the engine, and to perform parametric analyses by varying the engine operating conditions. In this work, the air-cooling system of a 4-cylinder spark ignition engine, designed by CMD Engine Company for aeronautical applications, is analysed in order to evaluate the amount of the air mass flow rate to guarantee the heat transfer under full load operating conditions. A preliminary validation of the model is performed by comparing the results with available experimental data. A parametric study is also performed to assess the influence of the controlling parameters on the cooling system efficiency. This study is carried out by varying the inlet air mass flow rate from 1.0 kg/s to 1.5 kg/s and the temperature of the inner wall surfaces of the engine combustion chambers from 390 K to 430 K.
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Radchenko, Andrii, Eugeniy Trushliakov, Krzysztof Kosowski, Dariusz Mikielewicz i Mykola Radchenko. "Innovative Turbine Intake Air Cooling Systems and Their Rational Designing". Energies 13, nr 23 (25.11.2020): 6201. http://dx.doi.org/10.3390/en13236201.
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The efficiency of cooling ambient air at the inlet of gas turbines in temperate climatic conditions was analyzed and reserves for its enhancing through deep cooling were revealed. A method of logical analysis of the actual operation efficiency of turbine intake air cooling systems in real varying environment, supplemented by the simplest numerical simulation was used to synthesize new solutions. As a result, a novel trend in engine intake air cooling to 7 or 10 °C in temperate climatic conditions by two-stage cooling in chillers of combined type, providing an annual fuel saving of practically 50%, surpasses its value gained due to traditional air cooling to about 15 °C in absorption lithium-bromide chiller of a simple cycle, and is proposed. On analyzing the actual efficiency of turbine intake air cooling system, the current changes in thermal loads on the system in response to varying ambient air parameters were taken into account and annual fuel reduction was considered to be a primary criterion, as an example. The improved methodology of the engine intake air cooling system designing based on the annual effect due to cooling was developed. It involves determining the optimal value of cooling capacity, providing the minimum system sizes at maximum rate of annual effect increment, and its rational value, providing a close to maximum annual effect without system oversizing at the second maximum rate of annual effect increment within the range beyond the first maximum rate. The rational value of design cooling capacity provides practically the maximum annual fuel saving but with the sizes of cooling systems reduced by 15 to 20% due to the correspondingly reduced design cooling capacity of the systems as compared with their values defined by traditional designing focused to cover current peaked short-term thermal loads. The optimal value of cooling capacity providing the minimum sizes of cooling system is very reasonable for applying the energy saving technologies, for instance, based on the thermal storage with accumulating excessive (not consumed) cooling capacities at lowered current thermal loads to cover the peak loads. The application of developed methodology enables revealing the thermal potential for enhancing the efficiency of any combustion engine (gas turbines and engines, internal combustion engines, etc.).
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Fuadi, Mohammad Hasan. "Design and Build Temperature Control and Monitoring in Diesel Engines Using Mobile". Jurnal Jartel: Jurnal Jaringan Telekomunikasi 10, nr 1 (12.03.2020): 31–37. http://dx.doi.org/10.33795/jartel.v10i1.183.
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Diesel engines is generally used for industrial and agricultural machines. Few people care about the engine temperature so it is forced to reach temperature of 100oC, which causes overheating of the diesel engine and has an impact on the performance itself. This also uses a hopper cooling system which is certainly not effective, because it's necessary to see that the water in the reservoir is still or not, also not equipped with an engine temperature display so it's difficult to ascertain the temperature inside. This study aims to monitor and control the temperature of cooling water. Operation of temperature control uses a telecontrol system that is connected to network (Internet of Things) so diesel temperature control can be done remotely. Monitoring of temperature and water level in the reserve tank using Web Mobile. In addition, there is a temperature sensor that is used to measure the temperature of the cooling water so that users can monitor the temperature of the diesel engine on Web Mobile. The test results obtained, the temperature sensor has an average temperature reading error of 0.031004%. Diesel engines with controlled solenoid valve cooling systems can produce ideal temperatures compared to when the solenoid valve is open (using the radiator continuously) or when the solenoid valve is Closed (without using a radiator). When the solenoid is controlled the engine temperature can be ideal because the solenoid valve opening and closing system has the lowest temperature of 56.34oC and the highest temperature of only 80.85oC.
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Uzkan, T., i M. A. Lenz. "On the Concept of Separate Aftercooling for Locomotive Diesel Engines". Journal of Engineering for Gas Turbines and Power 121, nr 2 (1.04.1999): 205–10. http://dx.doi.org/10.1115/1.2817106.
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This paper describes a patented cooling system concept for a turbocharged diesel engine. In particular, it defines a cooling system having the capability of transferring some of the cooling capacity of engine jacket and engine oil cooling to cool the cylinder inlet air when more than the cooling capacity built into the system through the size of the radiators and fans is needed. This increased aftercooling will improve the engine performance and reduce emission levels. The cooling capacity of a locomotive is essentially determined by the radiator and fan size, among other factors, and is designed to cool the engine within acceptable metal temperatures at a specified maximum ambient temperature and at the maximum engine power. On the other hand, at lower ambient temperatures or engine power levels, the cooling needs of the engine will be less than this maximum cooling capacity of the cooling system. There remains some excess capacity. This paper describes the concept called the “Separate Aftercooling System” that uses some of this excess cooling capacity to cool the engine inlet air at the aftercoolers. It shows the feasibility of such a system, describes the order of magnitude of benefits that can be expected from such a system, and outlines the implementation of this concept to EMD built Locomotives.
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Seraj, Mohd, Syed Mohd Yahya, Irfan Anjum Badruddin, Ali E. Anqi, Mohammad Asjad i Zahid A. Khan. "Multi-Response Optimization of Nanofluid-Based I. C. Engine Cooling System Using Fuzzy PIV Method". Processes 8, nr 1 (25.12.2019): 30. http://dx.doi.org/10.3390/pr8010030.
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Effective cooling of the internal combustion (I. C.) engines is of utmost importance for their improved performance. Automotive heat exchangers used as radiator with low efficiency in the industry may pose a serious threat to the engines. Thus, thermal scientists and engineers are always looking for modern methods to boost the heat extraction from the engine. A novel idea of using nanofluids for engine cooling has been in the news for some time now, as they have huge potential because of better thermal properties, strength, compactness, etc. Nanofluids are expected to replace the conventional fluids such as ethylene glycol, propylene glycol, water etc. due to performance and environmental concerns. Overall performance of the engine cooling system depends on several input parameters and therefore they need to be optimised to achieve an optimum performance. This study is focussed on developing a nanofluid engine cooling system (NFECS) where Al2O3 nanoparticles mixed with ethylene glycol (EG) and water is used as nanofluid. Furthermore, it also explores the effect of four important input parameters of the NFECS i.e., nanofluid inlet temperature, engine load, nanofluid flow rate, and nanoparticle concentration on its five attributes (output responses) viz thermal conductivity of the nanofluid, heat transfer coefficient, viscosity of the nanofluid, engine pumping power required to pump the desired amount of the nanofluid, and stability of the nanofluid. Taguchi’s L18 orthogonal array is used as the design of experiment to collect experimental data. Weighting factors are determined for output responses using the Triangular fuzzy numbers (TFN) and optimal setting of the input parameters is obtained using a novel fuzzy proximity index value (FPIV) method.
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Luo, Qing Guo, Guang Zheng Ran i Zheng Bo Gong. "Research on Regulating of Engine Cooling Intensity with Fuzzy Control". Advanced Materials Research 490-495 (marzec 2012): 578–82. http://dx.doi.org/10.4028/www.scientific.net/amr.490-495.578.
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In order to improve the overall performance of the engine cooling system, make the engine work in a stable and suitable thermal condition, a fuzzy controller for the engine cooling system was designed, then the cooling control model was established in Simulink, and the engine cooling system model of a diesel engine was built in GT-cool. Simulation computation was taken on the coupling of the two models. The results indicate that fuzzy control has visible effect for the improvement of the cooling system.
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Duan, Min, Yang Liu i Dong Wang. "Design and Controlling Study on Electro-Hydraulic Mix-Drive Cooling System in Vehicle". Advanced Materials Research 299-300 (lipiec 2011): 1295–98. http://dx.doi.org/10.4028/www.scientific.net/amr.299-300.1295.
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This thesis analysis the work course of the system, the match of major part, a fuzzy method for controlling the engine coolant temperature is proposed. The fuzzy rule base is correspondingly established based on the experimental data. The control query table is created through computing and analyzing via the fuzzy logic tools in MATLAB. The test indicates that only a little improvement of the current engine cooling system can better solve the problem that it is difficult to accurately control the engine coolant temperature.
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Myagkov, L. L., i V. M. Sivachev. "Methods for Determining the Thermal State of Medium-Speed Diesel Engines Taking into Account Boiling of the Coolant". Proceedings of Higher Educational Institutions. Маchine Building, nr 07 (724) (lipiec 2020): 22–28. http://dx.doi.org/10.18698/0536-1044-2020-7-22-28.
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Forcing medium-speed diesel engines by increasing the mean effective pressure leads to an increase in the thermal factor of the engine parts. High temperatures of the cylinder head fire deck and the cylinder liner working surface cause thermal fatigue cracks in these parts as well as piston scuffing. Therefore, the development of new methods of intensifying heat transfer in the cooling gallery and refined methods for determining the engine parts thermal state is currently relevant. In both areas of research, a significant role is played by the process of coolant boiling, which significantly intensifies heat transfer in the cooling system. A review of the literature showed that the existing methods of mathematical modeling of conjugate heat transfer in the cooling cavities taking into account the boiling process have a number of significant drawbacks. This paper presents the developed mathematical model and methods for determining the thermal state of medium-speed diesel engine parts taking into account boiling of the coolant, thus making it possible to combine the advantages of both the engineering approach and numerical simulation based on computational fluid dynamics. The thermal state of a new generation medium-speed diesel engine D500 was calculated and the thermal factor of the main engine parts was estimated.
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Du, Dong. "Computer Simulation of an Engine Environmental Control System". Advanced Materials Research 850-851 (grudzień 2013): 355–58. http://dx.doi.org/10.4028/www.scientific.net/amr.850-851.355.
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This paper describes the use of Fluid Flow Simulation Software to model a passenger aircraft engine environmental control system. The analysis simulates the cooling pack and the engine distribution system in a single model.The engine environmental system is very important for engine working efficiently. Using AMEsim software to simulate the cooling system can make it easily and clearly. The influence of the heat component and the fan operating is studied also. Through the analysis of the cooling system, we know that with the help of fan, the system can get additional air in the radiator and make the temperature decrease consequently.
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Pokusaev, Mikhail Nikolaevich, Alexei Viktorovich Trifonov i Elena Georgievna Ilyina. "Expected economic effect after installing variator for main engine cooling system pump". Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies 2020, nr 4 (18.11.2020): 87–94. http://dx.doi.org/10.24143/2073-1574-2020-4-87-94.
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The article describes the process of increasing power efficiency of the ship’s main engines along with reducing power losses on the drive of auxiliary mechanisms. The most common ship cooling systems with two circuits of fresh water and seawater have a disadvantage: the power consumed by the external circuit pump drive does not change when the temperature of the cooling seawater changes. The amount of energy taken from the effective power of the engine by the pump is significant. The technical solution proposed allows to regulate the speed of the mounted pump and to reduce fuel consumption. The chart of the variator in the seawater pump drive of the engine 8ChSP13/14 has been shown. The variator with automatic control is installed between the pump and the engine power take-off shaft, which helps to regulate the speed of the impeller for normal engine cooling. The maximal effect of the proposed modernization can be obtained under the vessel's operation with the seawater temperature below the calculated one. The description of the experimental stand developed in the laboratory of Astrakhan State Technical University, which is simulating the cooling system of the marine engine 8ChSP13 / 14, has been given. The graph of the change in torque versus time is illustrated at the impeller speed of 1 800 rpm. It has been stated that the mechanical characteristics of the pump for different operating modes obtained as a result of experimental studies allow to assess the economic effect from reducing fuel consumption. The results of economic design of installing a variable speed drive in the cooling system of a marine engine are presented as a case study of the vessel Moscow-169 (Astrakhan passenger motor ship).
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SZRAMOWIAT, Mateusz. "The concept of a new refrigerant in combustion engines in aspect of the requirements of modern drive systems". Combustion Engines 177, nr 2 (1.05.2019): 46–49. http://dx.doi.org/10.19206/ce-2019-208.
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The article presents currently applied construction solutions for currently used cooling systems for internal combustion engines. There were presented their defects and possible development directions were indicated. On this basis the concept of a cooling system which will enable the improvement of heat exchange in the internal combustion engine has been proposed.
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Ruzimov, S., i D. A. Muydinov. "STUDY ON CAR ANTIFREEZE AND COOLANT: MAIN PROBLEMS, MAINTAINING, REPAIRING AND DIAGNOSING SERVICES". TECHNICAL SCIENCES 5, nr 3 (30.05.2020): 46–50. http://dx.doi.org/10.26739/2181-9696-2020-5-7.
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In this report we explained diagnosing, maintaining and repairing the cooling system problems. Cooling system is quite dependable. Employed cooling system in an automobile is to maintain the desired coolant temperature thus ensuring for optimum engine operation. However, they do require periodic maintenance. Cooling system service is one of the best values for the customer in terms of preventive maintenance
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Pang, Hong Lei, Cai Yun Zhu, Zhi Bin Ni i Yao Hua Wei. "Research and Application of the Auto-Control Cooling System for the Diesel Engine". Advanced Materials Research 805-806 (wrzesień 2013): 1970–74. http://dx.doi.org/10.4028/www.scientific.net/amr.805-806.1970.
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In order to solve the problem that the traditional cooling system cannot adjust the cooling water temperature to the different operation conditions of diesel engine, the auto-control cooling system is designed. Using it, the coolant temperature can be adjusted automatically by the single-chip which controls the transducer-controlled pump and the electronic dividing valve which replaces the thermostat. We use the thermal equilibrium bench to verify the figures, and the result is show that using the exhaust of generator heats the cooling water can shorten 13 minutes in starting process and the cooling water temperature adjusted automatically to the changing operation conditions of iesel can decrease the fuel consumption remarkably, the highest fuel saving rate reached 5.4%, the averagely fuel saving rate reached 3.6%.
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Andreini, Antonio, Gianluca Caciolli, Bruno Facchini i Lorenzo Tarchi. "Experimental Evaluation of the Density Ratio Effects on the Cooling Performance of a Combined Slot/Effusion Combustor Cooling System". ISRN Aerospace Engineering 2013 (30.05.2013): 1–14. http://dx.doi.org/10.1155/2013/423190.
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The purpose of this study is to investigate the effects of coolant-to-mainstream density ratio on a real engine cooling scheme of a combustor liner composed of a slot injection and an effusion array with a central dilution hole. Measurements of heat transfer coefficient and adiabatic effectiveness were performed by means of steady-state thermochromic liquid crystals technique; experimental results were used to estimate, through a 1D thermal procedure, the Net Heat Flux Reduction and the overall effectiveness in realistic engine working conditions. To reproduce a representative value of combustor coolant-to-mainstream density ratio, tests were carried out feeding the cooling system with carbon dioxide, while air was used in the main channel; to highlight the effects of density ratio, tests were replicated using air both as coolant and as mainstream and results were compared. Experiments were carried out imposing values of effusion blowing and velocity ratios within a range of typical modern engine working conditions. Results point out the influence of density ratio on film cooling performance, suggesting that velocity ratio is the driving parameter for the heat transfer phenomena; on the other hand, the adiabatic effectiveness is less sensitive to the cooling flow parameters, especially at the higher blowing/velocity ratios.
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Abdul Jalal, Rifqi Irzuan, M. A. Mohd Yusoff, H. M. Abid Hasan i M. N. Yahya. "Simulation of bypass electric water pump to reduce the engine warm-up time". Journal of Mechanical Engineering and Sciences 15, nr 3 (19.09.2021): 8241–52. http://dx.doi.org/10.15282/jmes.15.3.2021.03.0647.
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There are several strategies have been developed in the automotive cooling system to improve engine thermal management. Basically, these designs use controllable actuators and mechatronic components such as electric water pump, controllable thermostat, and controllable electric fan to improve engine temperature control on most operating ranges. Most of the strategies are complicated and costly. This paper introduced a different approach to improve coolant temperature warm-up during cold start. The new strategy was by promoting a higher coolant flow rate inside the engine block by just installing an electric water pump in the bypass hose. The new approach’s cold start performance was studied using GT-SUITE on a transient model, complete with finite-element of engine block design, lubrication system, components friction model, engine with combustion model and vehicle system. The proposed strategy clearly showed faster coolant temperature increase (18 seconds faster compared to the conventional cooling system). The strategy not only increase the coolant temperature faster, but also increases the oil temperature faster, lower Friction Mean Effective Pressure (FMEP), and lower fuel consumption at certain condition during the warm-up period.
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Kula, Sinan. "Design Studies of Two Stage Cooling Loop for New Generation Vehicles". Academic Perspective Procedia 3, nr 1 (25.10.2020): 550–59. http://dx.doi.org/10.33793/acperpro.03.01.104.
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In this article, the design and integration of an intelligent refrigeration system that increases air conditioning and engine efficiency, reduces fuel consumption and emission levels in vehicles manufactured today will be examined. This design will include a two-stage cooling system. Two-stage cooling unit consist; high temperature radiator and low temperature radiator. The engine coolant will be cooled in the high temperature radiator. In the low temperature radiator, coolant of water cooled air charger and air conditioning condenser will be cooled. It is aimed to increase the engine efficiency by cooling more efficiently, thanks to the heat carrying capacity of the water which is high compared to air. With this project, it is aimed to cool the heated air after the turbocharging and air conditioning gas in the vehicle with water instead of air.
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Li, Wen Shang, Yu Hong Long, Jun Liang Liu, Jie Cai i Xin Zhan. "Simulation and Optimization for the Cooling System of Heavy Vehicle Engine". Applied Mechanics and Materials 599-601 (sierpień 2014): 455–59. http://dx.doi.org/10.4028/www.scientific.net/amm.599-601.455.
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An engine cooling system of heavy vehicle was used as a research object in this thesis. Engine system model was designed with KULI software according to wind tunnel testing data of heat exchanger provided by supplier. Simulation calculation provides optimization program based on the results. The result is that it can simulate calculation with KULI software, in the early design on a cooling system of heavy vehicle engine. The study provides a theoretical basis for the design of a cooling system of heavy vehicle engine, improve the efficiency and save the cost.
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Nabil, Tamer, M. Elfarran i Ahmed M. Farag. "Investigation the Cooling Performance of Vehicle Engines Using Radiator with Nano-Fluid as a Coolant". Journal of Nanofluids 9, nr 3 (1.09.2020): 187–95. http://dx.doi.org/10.1166/jon.2020.1742.
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In the cooling system of the automobile engine, the water which is used as a coolant is evaporated due to high engine temperature, so it needs to add some additives to the coolant water but they dont give high performance compared to adding some of Nano-particles. This work investigated the heat transfer characteristics with Nano-fluid used in a radiator as vehicle engines coolant. The Nano-particles are introduced to a conventional coolantin certain concentrations resulted in, enhancing the ability to transfer heat, lowering the energy cost and theenvironmental impact. The performance enhancement caused reduction of the radiator and the vehicle frontal areathat lowered the coefficient of drag consequently reduced the fuel consumption. Two types of Nano-particles; metal(Cu) and metal oxide (CuO) are used with different concentrations (1%, 2% and 4%) in conventional coolant asa base fluid. Cooling of vehicle engine using radiator operated with different working fluids as water, coolant and modified coolant with Nano-particles are investigated. The conventional coolant with Nano Cu 2% had lowest exit temperature from the radiator and highest amount of heat rejection, so it can be used as industrial Nano-coolant.
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He, Xing, Xian Cheng Wang, Jun Biao Hu i Zhi Xin Sun. "Research on the Cooling Fan Speed Control Scheme of the Large Power Vehicular Diesel Engine in Altitude Environment". Applied Mechanics and Materials 496-500 (styczeń 2014): 1226–30. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.1226.
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The cooling water of the large power vehicular diesel engine often got high or low and engine could not work in the adaptive thermal conditions in altitude environment. In order to solve the problem, analyzed the refrigeration requirement of the diesel engine on plateau section, suggested the amelioration program from installing the fluid operated pump-mot fan speed regulating device. Base on the coupling simulation model of the diesel engine working process and coolant system, took the 90°C water temperature of the diesel engine as the optimally target value, analyzed the change canon of cooling fan speed form the ambient conditions and the diesel engine work condition, established the cooling fan rotary speed control MAP on plateau section, and regulated the cooling fan speed by the methods of open loop preset controlling and closed loop feedback controlling. That would provide the improved method for the large power vehicular diesel engine working well on plateau section.
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Радченко, Андрій Миколайович, Анатолій Анатолійович Зубарєв, Сергій Георгійович Фордуй, Володимир Володимирович Бойчук i Віталій Васильович Цуцман. "АНАЛІЗ ЕФЕКТИВНОСТІ ОХОЛОДЖЕННЯ ПОВІТРЯ КОГЕНЕРАЦІЙНОГО ГАЗОПОРШНЕВОГО МОДУЛЯ УСТАНОВКИ АВТОНОМНОГО ЕНЕРГОЗАБЕЗПЕЧЕННЯ". Aerospace technic and technology, nr 7 (31.08.2019): 76–80. http://dx.doi.org/10.32620/aktt.2019.7.10.
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The analysis of the efficiency of cooling air of cogeneration gas-piston module of installations for combined production of electric energy, heat, and cold is performed. The installation for energy supply includes two JMS 420 GS-N.LC GE Jenbacher cogeneration gas-piston engines manufactured as cogeneration modules with heat exchangers for removing the heat of exhaust gases, scavenge gas-air mixture, cooling water of engine and lubricating oil. The heat of hot water is transformed by the absorption lithium-bromide chiller AR-D500L2 Century into the cold, which is spent on technological needs and for the operation of the central air conditioner for cooling the incoming air of the engine room, wherefrom it is sucked by the turbocharger of the engine. The temperature of the scavenge gas-air mixture at the entrance to the working cylinders of the engine is maintained by the system of recirculating cooling with the removal of its heat into surroundings by the radiator. Because of significant heat influx from working engines and other equipment, as well as through the enclosures of the engine room from the outside to the air-cooled in the central air conditioner in the engine room, from where it is sucked by a turbocharger, the air temperature at the inlet of the turbocharger is quite high: 25...30 °C. At elevated temperatures of the ambient air at the inlet of the radiator for cooling scavenge gas-air mixture and the air at the turbocharger inlet the fuel economy of engine is falling, which indicates the need for efficient cooling of air. The efficiency of cooling the air of the gas-piston module was estimated by a reduction in the consumption of gaseous fuel and the increase in electric power of the engine. For this purpose, the data of monitoring on the fuel efficiency of the gas-piston engine with the combined influence of the ambient air temperature at the inlet of the radiator and the air at the turbocharger inlet were processed to obtain data on their separate effects and to determine the ways to further improve the air cooling system of the gas-piston module.
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DETERRE, Daniel. "Organic technology coolant for gas engines. What benefits?" Combustion Engines 125, nr 2 (1.05.2006): 73–77. http://dx.doi.org/10.19206/ce-117355.
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Results of investigation of fluid coolant Coolelf Supra application on some engine parts in long-time running conditions have been presented in the paper. It was recognized, that organic additive coolant technology leads to smaller wear of engine parts, better cooling performance and longer engine life. The suitability of the “Diagofluid” system for monitoring of engine running or maintenance troubles has been stated.
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Che Sidik, Nor Azwadi, Muhammad Noor Afiq Witri Mohd Yazid i Rizalman Mamat. "Recent advancement of nanofluids in engine cooling system". Renewable and Sustainable Energy Reviews 75 (sierpień 2017): 137–44. http://dx.doi.org/10.1016/j.rser.2016.10.057.
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Park, Kyoung Suk, Jong Phil Won i Hyung Seok Heo. "Thermal flow analysis of vehicle engine cooling system". KSME International Journal 16, nr 7 (lipiec 2002): 975–85. http://dx.doi.org/10.1007/bf02949727.
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Romanov, V. A., i N. A. Khozeniuk. "Experience of the Diesel Engine Cooling System Simulation". Procedia Engineering 150 (2016): 490–96. http://dx.doi.org/10.1016/j.proeng.2016.07.025.
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R Dolas, Dhananjay, i Sudhir Deshmukh. "Reliability Ananlysis of Cooling System of Diesel Engine". Universal Journal of Mechanical Engineering 3, nr 2 (marzec 2015): 57–62. http://dx.doi.org/10.13189/ujme.2015.030205.
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Ovcharenko, Sergey, Oleg Balagin i Dmitry Balagin. "Cooling system operation efficiency of locomotive diesel engine". IOP Conference Series: Earth and Environmental Science 90 (październik 2017): 012011. http://dx.doi.org/10.1088/1755-1315/90/1/012011.
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Fedorov, A. Yu. "Reduction of Fuel Consumption in 12ЧН15/18-Type Diesel Engine by Regulating Cooling System". Science & Technique 18, nr 3 (2.07.2019): 248–55. http://dx.doi.org/10.21122/2227-1031-2019-18-3-248-255.
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Many countries exploit a large number of armored vehicles, developed and manufactured dozens of years ago. Due to this there is a necessity of its continuous modernization. An object of the research is an internal combustion engine for a ground armored vehicle with a 12ЧН15/18 diesel engine. Calculation of engine thermal balance components is based on an engine external speed characteristic. An analysis of thermal balance for a 12ЧН15/18-type diesel engine of a ground armored vehicles has been made with separation according to: heat being withdrawn from cooling system liquid to environment; oil of lubrication system in the internal combustion engine; efficiently used heat; heat being withdrawn along with exhausted gases; residual portion of heat. The paper presents characteristics on changes in heat release during loading modes of the diesel engine operation and also shows an influence of the diesel loading on amount of heat withdrawn by cooling water and oil of diesel lubrication system. Two versions of the cooling system are considered in the paper, namely: with regulation and without regulation. The paper contains description of evaluation pertaining to an influence of a regulating system on characteristics of the diesel cooling system, parameters of efficient power and specific and efficient consumption of fuel. The necessity has been proved to modernize a regular fan cooling system of the armored vehicle with the 12ЧН15/18-type diesel engine. An influence of an average cooling liquid and diesel oil temperature with loading modes of 60 and 80 % on the efficient power of a power unit with a fan-type cooling system has been investigated in the paper. It has been determined that an increase in average temperatures of cooling liquid and oil for the 12ЧН15/18-type diesel makes it possible to improve economy and power of the diesel engine.