Готові списки джерел за темами / MULTI-COMPRESSOR REFRIGERATION SYSTEM

Добірка наукової літератури з теми "MULTI-COMPRESSOR REFRIGERATION SYSTEM"

Автор: Grafiati

Опубліковано: 11 вересня 2023

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Статті в журналах з теми "MULTI-COMPRESSOR REFRIGERATION SYSTEM"

Cirera, Josep, Jesus A. Carino, Daniel Zurita, and Juan A. Ortega. "A Data-Driven-Based Industrial Refrigeration Optimization Method Considering Demand Forecasting." Processes 8, no. 5 (May 21, 2020): 617. http://dx.doi.org/10.3390/pr8050617.

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Анотація:

One of the main concerns of industry is energy efficiency, in which the paradigm of Industry 4.0 opens new possibilities by facing optimization approaches using data-driven methodologies. In this regard, increasing the efficiency of industrial refrigeration systems is an important challenge, since this type of process consume a huge amount of electricity that can be reduced with an optimal compressor configuration. In this paper, a novel data-driven methodology is presented, which employs self-organizing maps (SOM) and multi-layer perceptron (MLP) to deal with the (PLR) issue of refrigeration systems. The proposed methodology takes into account the variables that influence the system performance to develop a discrete model of the operating conditions. The aforementioned model is used to find the best PLR of the compressors for each operating condition of the system. Furthermore, to overcome the limitations of the historical performance, various scenarios are artificially created to find near-optimal PLR setpoints in each operation condition. Finally, the proposed method employs a forecasting strategy to manage the compressor switching situations. Thus, undesirable starts and stops of the machine are avoided, preserving its remaining useful life and being more efficient. An experimental validation in a real industrial system is performed in order to validate the suitability and the performance of the methodology. The proposed methodology improves refrigeration system efficiency up to 8%, depending on the operating conditions. The results obtained validates the feasibility of applying data-driven techniques for the optimal control of refrigeration system compressors to increase its efficiency.

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Zhang, Liang, Huawei Zhang, Qiyu Chen, and Danfeng Long. "A Mathematical Approach for Sound Insulation Characteristics and Cost Optimization of Double-Layer Composite Structures." Journal of Composites Science 7, no. 3 (March 9, 2023): 110. http://dx.doi.org/10.3390/jcs7030110.

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The compressor is the primary source of noise in a refrigeration system. Most compressors are wrapped with multi-layer sound insulation cotton for noise reduction and sound insulation. We explore the sound insulation law of different polyvinyl chloride thicknesses and non-woven fibers. Polyvinyl chloride with varying thicknesses and non-woven fibers are then combined by bonding to study the sound insulation characteristics of a two-layer composite structure. A sound insulation prediction model is established using the multi-parameter nonlinear regression method. An optimal cost mathematical model is established based on experimental and mathematical methods that can quickly determine the optimal cost scheme for different designs with the same effect.

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Negara, I. Putu Sastra, and Ni Ketut Rusminingsih. "The Analysis of the Use of Intercooler on a Multi Stage Cold Storage Simulator Toward the Compressor Work." Logic : Jurnal Rancang Bangun dan Teknologi 22, no. 2 (July 30, 2022): 132–39. http://dx.doi.org/10.31940/logic.v22i2.132-139.

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Multistage type cold storage is a refrigeration machine required in an industry because it functions to store food products for a long time. Bali, as a world tourist destination, will rely heavily on this cooling system in preparing services for tourists, especially in the food and beverage sector. Multistage type cold storage is designed to reach the evaporator temperature below -30oC thus the used compressor performance must be able to produce maximum refrigeration effect. Two compressors placed in succession or connected in series complete this cold storage system, which is expected to achieve higher operating pressures. The temperature occurring due to the pressure increase on the second compressor will be anticipated by installing an intercooler aiming at preventing excessive heat or over heat during the compression. The extent to which the important role of the intercooler as a stabilizer of operating temperature in this cooling cycle will be shown in its working cycle with a Mollier diagram (P-h diagram). The data obtained during the operation of the multistage type cold storage is then transferred to the P-h diagram of R134A to determine the cycle diagram and the enthalpy which then determines the amount of COP, the maximum temperature achieved by the system, and its energy requirements. The calculation results obtained using the intercooler COP is 1.83, and the maximum temperature achieved is 67oC, and the energy consumption seen from the total entalphy difference due to compression work is 81 kJ/kg. Without using the intercooler, the system’s COP is 1.72 and the maximum temperature achieved is 94.9oC and 86 kJ/kg of energy consumption. The energy required for the operational becomes more eficient and the heat released to the environment is much less, therefore the multistage cold storage with intercooler can be categorized as an eco-friendly technology.

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Mishra, R. S. "Thermodynamic Performance Evaluation of Multi-Evaporators Single Compressor and Single Expansion Valve and Liquid Vapour Heat Exchanger in Vapour Compression Refrigeration Systems using Thirteen Ecofriendly Refrigerants for Reducing Global Warming and Ozo." International Journal of Advance Research and Innovation 1, no. 3 (2013): 107–17. http://dx.doi.org/10.51976/ijari.131315.

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The methods for improving first law and second law efficiency have been considered in this paper by using liquid vapour heat exchanger is investigated in this paper. Detailed energy and exergy analysis of multi-evaporators at different temperatures with single compressor and single expansion valve using liquid vapour heat exchanger vapour compression refrigeration systems have been done in terms of performance parameter for R507a, R125, R134a, R290, R600, R600a, R1234ze, R1234yf, R410a, R407c, R707, R404a and R152a refrigerants. The numerical computations have been carried out for both systems. It was observed that first law and second law efficiency improved by 20% using liquid vapour heat exchanger in the vapour compression refrigeration systems. It was also observed that performance of both systems using R717 is higher but R600 and R152a nearly matching same values under the accuracy of 5% can be used in the above system .But difficulties using R152a, R600, R290 and R600a have flammable problems therefore safety measures are required using these refrigerants. Therefore R134a refrigerant is recommended for practical and commercial applications although it has slightly less thermal performance than R152a which is not widely used refrigerant for domestic and industrial applications

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Misra, R. K. "Thermodynamic Performance Evaluation of Multi-Evaporators single Compressor and single Expansion Valve and Liquid Vapour Heat Exchanger in Vapour Compression Refrigeration systems using Thirteen Eco-friendly Refrigerants for Reducing Global Warming and Oz." International Journal of Advance Research and Innovation 2, no. 2 (2014): 139–49. http://dx.doi.org/10.51976/ijari.221421.

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Sarabia, Daniel, María Cruz Ortiz, and Luis Antonio Sarabia. "Integrated Design of a Supermarket Refrigeration System by Means of Experimental Design Adapted to Computational Problems." Algorithms 15, no. 11 (November 7, 2022): 417. http://dx.doi.org/10.3390/a15110417.

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In this paper, an integrated design of a supermarket refrigeration system has been used to obtain a process with better operability. It is formulated as a multi-objective optimization problem where control performance is evaluated by six indices and the design variables are the number and discrete power of each compressor to be installed. The functional dependence between design and performance is unknown, and therefore the optimal configuration must be obtained through a computational experimentation. This work has a double objective: to adapt the surface response methodology (SRM) to optimize problems without experimental variability as are the computational ones and show the advantage of considering the integrated design. In the SRM framework, the problem is stated as a mixture design with constraints and a synergistic cubic model where a D-optimal design is applied to perform the experiments. Finally, the multi-objective problem is reduced to a single objective one by means of a desirability function. The optimal configuration of the power distribution of the three compressors, in percentage, is (50,20,20). This solution has an excellent behaviour with respect to the six indices proposed, with a significant reduction in time oscillations of controlled variables and power consumption compared with other possible power distributions.

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Samsi, Samsi, Ade Hermawan, and Muhammad Ilham. "Product Refrigeration Load Analysis On Contact Plate Freezer On Compressor Performance At PT. Trimitra Makmur, Tarakan, North Kalimantan." Barakuda 45: Jurnal Ilmu Perikanan dan Kelautan 5, no. 1 (April 30, 2023): 68–78. http://dx.doi.org/10.47685/barakuda45.v5i1.349.

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Contact plate freezer (CPF) is a cooling machine unit for freezing products which of course will maintain product freshness. In Order to runs smoothly, one thing that must be considered of the cooling system is the cooling load on the freezer contact plate. The cooling load is the amount of heat absorbed per unit time. The refrigeration cycle at PT. Trimitra Makmur uses a combined refrigeration cycle (multi-stage cycle), uses two cycles of vapor compression using two single-stage compressors. The two compressors used have the same power of 55.92 kW. The cooling load on the contact plate freezer consists of product heat load, water heat load, internal heat load, and transmission heat load. In The contact plate freezer, infiltration or heat load from the outside air are not counted because during production the contact plate freezer door is closed tightly so that the air exchange value is very small and can be neglected. In this study, the average total load on contact plate freezer 1 was 23.07079 kW, so that the average total load on the three contact plate freezers at PT. Trimitra Makmur is 69.21237 kW. The results of data collection and calculations show that the COP (Coefficient of Performance) value for the high-stage cycle is 4.33, so that the high-stage compressor power used is 1/4.33 of the cooling capacity of the contact plate freezer. Whereas in the booster cycle, a COP of 6.49 was obtained, so that the booster compressor power used was 1/6.49 of the cooling capacity of the contact plate freezer.

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Du, Yang, Nan Jiang, Yicen Zhang, Xu Wang, Pan Zhao, Jiangfeng Wang, and Yiping Dai. "Multi-objective optimization of an innovative power-cooling integrated system based on gas turbine cycle with compressor inlet air precooling, Kalina cycle and ejector refrigeration cycle." Energy Conversion and Management 244 (September 2021): 114473. http://dx.doi.org/10.1016/j.enconman.2021.114473.

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Widell, K. N., and T. Eikevik. "Reducing power consumption in multi-compressor refrigeration systems." International Journal of Refrigeration 33, no. 1 (January 2010): 88–94. http://dx.doi.org/10.1016/j.ijrefrig.2009.08.006.

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Bao, Huaiqian, Baokun Han, Yufeng Xu, Yuechao Liu, and Guifang Liu. "The analysis of vibration response of air-cooled refrigerator excited by reciprocating compressor." E3S Web of Conferences 53 (2018): 02005. http://dx.doi.org/10.1051/e3sconf/20185302005.

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Анотація:

The features of large-capacity and multi temperature zones of air-cooled refrigerators are favored by consumers. However, the vibration of different components caused by the vibrations of different components in the operation process brings certain troubles to people's lives. In order to achieve better vibration and noise reduction of the refrigerator, the vibration characteristics of the air-cooled refrigerator are analyzed under the excitation of compressor, selects four detection points, and uses simulation methods to obtain the excitation of the compressor. In addition to the impact of the vibration source on the refrigerator, the assembly of refrigerator door is also an important factor of the refrigerator vibration. The experimental process has also found that the air-cooled system also has an impact on the vibration and noise generation of the refrigerator.

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Дисертації з теми "MULTI-COMPRESSOR REFRIGERATION SYSTEM"

Chan, Kuan Yoong. "Investigation and performance optimisation of multi compressor refrigeration system." Thesis, Brunel University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247504.

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SINGH, DHARMENDRA PRATAP. "OPTIMIZATION OF VARIOUS PARAMETERS FOR ENHANCING THE PERFORMANCE OF MULTI-COMPRESSOR REFRIGERATION SYSTEM." Thesis, 2017. http://dspace.dtu.ac.in:8080/jspui/handle/repository/15981.

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Анотація:

The present optimization has been done on multi-screw compressor system. Refrigeration cycle requires a lot of improvements for better performance to fulfill the desired condition with high performance in multi-compression system. Many of the parts run during the cooling effect and the running condition of system may vary as per the condition like ambient condition, part load, full load etc has also been changing which create an effect on the suction pressure, evaporator temperature, the rate of heat exchange, refrigerant flow and many other factors which are continuously changing. For efficient cooling process, the noise parameter of the system has to be analyze and its affecting level for the designed system. These noise parameter has controlled (minimize) by some controlled parameter. In this project, the optimization parameter is the Power and the affecting parameters are temperature, discharge pressure and slide valve positioning. The variation in these parameter with different working condition has analyze. The deviation in the effective cooling process can be obtained by its optimization. For the optimization process, taguchi approach with four factor and three level has selected which is best suitable with these conditions. This approach provides the best suited result for the different working conditions as per the requirement of the company. So the main motive of this work is to analyze the noise parameter and provide the best suited parameters in different working conditions so that effective and efficient cooling may be provided for the organization.

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Частини книг з теми "MULTI-COMPRESSOR REFRIGERATION SYSTEM"

Sengupta, Ayan, and Mani Sankar Dasgupta. "Thermodynamic Analysis of a Novel Dual-Ejector Multi-Compressor Transcritical-CO2 Refrigeration System for Supermarket Applications in Warm Climates." In Lecture Notes in Mechanical Engineering, 625–30. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6270-7_104.

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Тези доповідей конференцій з теми "MULTI-COMPRESSOR REFRIGERATION SYSTEM"

Heydari, Ali, and Kathy Russell. "Miniature Vapor Compression Refrigeration Systems for Active Cooling of High Performance Computers." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/epp-24710.

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Abstract A small refrigeration system for cooling of computer system components is evaluated. A thermodynamic model describing the performance of the cycle along with a computer simulation program is developed to evaluate its performance. The refrigeration system makes use of a miniature reciprocating vapor compression compressor. Due to space limitations in some high performance computer servers, a miniature refrigeration system composed of a compressor, capillary tube, a compact condenser, and a cold-plate evaporator heat exchanger are used. Mathematical multi-zone formulation for modeling thermal-hydraulic performance of heat exchanger for the condenser and evaporator are presented. The throttling device is a capillary tube and there is presented a mathematical formulation for predicting refrigerant mass flow rate through the throttling device. A physically based efficiency formulation for simulating the performance of the miniature compressor is used. An efficient iterative numerical scheme with allowance for utilization of various refrigerants is developed to solve the governing system of equations. Using the simulation program, the effects of parameters such as the choice of working refrigerant, evaporating and condensing temperatures on system components and overall efficiency of system are studied. In addition, a RAS (reliability, availability and serviceability) discussion of the proposed CPU-cooling refrigeration solution is presented. The results of analysis show that the new technology not only overcomes many shortcomings of the traditional fan-cooled systems, but also has the capacity of increasing the cooling system’s coefficient of performance.

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Wang, Yongqing, and Noam Lior. "Combined Desalination and Refrigeration Systems Driven by Low-Grade Heat." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-67029.

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There is often a need for both water desalination and cooling (refrigeration/air-conditioning). The cooling can be used to significantly raise system efficiency by compressor inlet cooling in a dual-purpose power-generation and desalination system using gas turbines, or simply to supply refrigeration or air conditioning beside fresh water. Motivated by the good synergetic potential of energy/exergy utilization through the combination of the LiBr-H2O refrigeration unit, LiBr-H2O heat pump, and low-temperature multi-effect evaporation desalter, two combined refrigeration and water systems, ARHP-MEE (Absorption Refrigeration Heat Pump and Multi-Effect Evaporation desalter) system and ARHP-AHP-MEE (Absorption Refrigeration Heat Pump + Absorption Heat Pump + Multi-Effect Evaporation desalter) system, driven by low-grade heat were configured, modeled and analyzed in detail in the paper. Typically, driving steam with saturation pressure of 0.15–0.35 MPa and correspondingly saturation temperature of 111.4–138.9°C is applicable to run the systems. The main results are: (1) the combined systems have good synergy, with an energy saving rate of 42% in a case study of ARHP-MEE; (2) the refrigeration-heat cogenerated ARHP subsystem is the main reason for the synergy, where the coefficient of performance is around 1.6 and exergy efficiency above 60% when driven by 0.25 MPa saturated steam; (3) at the cost of a more complex configuration, the ARHP-AHP-MEE system has the ability of varying its outputs in very wide range, offering good flexibility on design and operation; (4) the ARHP-MEE system is predicted to have good economics, and its outputs can be varied in a wide range but not independently because their ratio remains almost constant. A parametric analysis was also performed for the ARHP-MEE, further improving the understanding of the system performance.

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Anderson, Kevin R., and Trevor Steele. "Analysis of a FAME/MLL Screw Multi-Stage Compressor for High Temperature, High Pressure Vapor Compression Refrigeration Cycle." In ASME 2020 Fluids Engineering Division Summer Meeting collocated with the ASME 2020 Heat Transfer Summer Conference and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/fedsm2020-20002.

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Abstract This paper presents the analysis and design of a compressor for application to a Fatty Acid Methyl Ester (FAME) Methyl Linoleate (MLL) bio-refrigerant cascade working cycle. This working fluid is being used in the topping cycle of an active electronics payload cooling system design to operate at elevated temperatures and pressures such as those witnessed by a Venus lander. The twin-screw, three-stage compressor operates at escalated temperatures of approximately 520 °C (960 °F). The total compressor power of 143.4 W is shared as 43.5 W, 47.7 W, and 53.3 W over stages 1, 2, and 3, respectively. The screw compressor is baselined with a D = 1 inch diameter rotor and an L/D (stroke/bore) ratio of L/D = 2 per stage. The compression ratio corresponds to a volume ratio of 6.5. The swept volume for a 4+6 rotor configuration is estimated to be 1.13 CFM at 2000 RPM with an asymmetric profile and no leakage. The volumetric efficiency of the compressor is estimated to be on the order of 80% due to the higher molecular weight of the FAME/MLL working fluid. The SCORG turbomachinery software is used to verify the thermodynamics analysis and affords a volumetric displacement of 0.025 L/rev at 2000 RPM and 80% adiabatic efficiency.

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