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Artykuły w czasopismach na temat "Radiator airflow distribution"

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Subramaniyan, Baskar, and R. Rajaraman. "Numerical Investigation on Airflow Distribution of Automotive Radiator." International Review of Mechanical Engineering (IREME) 9, no. 4 (July 31, 2015): 417. http://dx.doi.org/10.15866/ireme.v9i4.6795.

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Ng, E. Y., P. W. Johnson, and S. Watkins. "An analytical study on heat transfer performance of radiators with non-uniform airflow distribution." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 219, no. 12 (December 1, 2005): 1451–67. http://dx.doi.org/10.1243/095440705x35116.

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Heat exchangers used in modern automobiles usually have a highly non-uniform air velocity distribution because of the complexity of the engine compartment and underhood flow fields; hence ineffective use of the core area has been noted. To adequately predict the heat transfer performance in typical car radiators, a generalized analytical model accounting for airflow maldistribution was developed using a finite element approach and applying appropriate heat transfer equations including the ε-NTU (effectiveness - number of heat transfer units) method with the Davenport correlation for the air-si
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Sun, He Chen, Jing Ye Zhao, Wen Hai Wang, and Zhi Yong Gao. "Research on Thermal Comfort in HVAC Laboratory." Applied Mechanics and Materials 148-149 (December 2011): 1122–26. http://dx.doi.org/10.4028/www.scientific.net/amm.148-149.1122.

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According to the characteristics of the laboratory, for the condition of using air conditioning that is falling to the ground pattern to assist radiator to heat, use CFD to simulate the airflow organization and thermal environment in laboratory. Meanwhile combine with the indoor relevant measured parameters, analyze distribution characteristics and finally evaluate the thermal comfort in laboratory in winter.
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Cvok, Ivan, Igor Ratković, and Joško Deur. "Multi-Objective Optimisation-Based Design of an Electric Vehicle Cabin Heating Control System for Improved Thermal Comfort and Driving Range." Energies 14, no. 4 (February 23, 2021): 1203. http://dx.doi.org/10.3390/en14041203.

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Modern electric vehicle heating, ventilation, and air-conditioning (HVAC) systems operate in more efficient heat pump mode, thus, improving the driving range under cold ambient conditions. Coupling those HVAC systems with novel heating technologies such as infrared heating panels (IRP) results in a complex system with multiple actuators, which needs to be optimally coordinated to maximise the efficiency and comfort. The paper presents a multi-objective genetic algorithm-based control input allocation method, which relies on a multi-physical HVAC model and a CFD-evaluated cabin airflow distribu
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Gendelis, S., and A. Jakovičs. "Numerical Modelling of Airflow and Temperature Distribution in a Living Room with Different Heat Exchange Conditions." Latvian Journal of Physics and Technical Sciences 47, no. 4 (January 1, 2010): 27–43. http://dx.doi.org/10.2478/v10047-010-0016-z.

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Numerical Modelling of Airflow and Temperature Distribution in a Living Room with Different Heat Exchange ConditionsNumerical mathematical modelling of the indoor thermal conditions and of the energy losses for separate rooms is an important part of the analysis of the heat-exchange balance and energy efficiency in buildings. The measurements of heat transfer coefficients for bounding structures, the air-tightness tests and thermographic diagnostics done for a building allow the influence of those factors to be predicted more correctly in developed numerical models. The temperature distributio
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Zhang, Xiaoyan, Baoyun Bu, Lang Liu, Tianrun Cao, Yaping Ke, and Qiangqiang Du. "Numerical Simulation on Cooling Effect of Working Face under Radiation Cooling Mode in Deep Well." Energies 14, no. 15 (July 22, 2021): 4428. http://dx.doi.org/10.3390/en14154428.

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Deep mining results in an increasingly serious hazard. Based on the principle of heat transfer and radiant cooling, a three-dimensional heat transfer model of the working face was established. The influence of the inlet airflow parameter, the surrounding wall temperature and other parameters on the temperature distribution of airflow along the working face were analyzed under the radiation cooling mode. The results show that the increment of airflow temperature in several sections along the working face decreases by 0.67 °C, 0.48 °C, 0.40 °C, 0.36 °C, 0.33 °C, 0.29 °C respectively. The farther
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Xie, Xu Liang, and Fu Lin Shen. "Numerical Investigation on Thermal Environment inside the Passenger Compartment of a Highway Sleeper Coach." Applied Mechanics and Materials 55-57 (May 2011): 215–18. http://dx.doi.org/10.4028/www.scientific.net/amm.55-57.215.

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In order to verify thermal comfort of a 12-meter-long highway sleeper coach equipped with a four-ducted air-conditioning system, the thermal environment inside the passenger compartment was numerical investigated with RNG k-ε turbulence model. Also, discrete ordinates radiation model was applied to consider the effect of solar irradiation. The characteristic distribution of the airflow organization and temperature field were obtained and compared with experiment results. Results show that the air flow and temperature distribution inside the passenger compartment are not uniform and greatly inf
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Zeller, Marie-Louise, Jannis-Michael Huss, Lena Pfister, Karl E. Lapo, Daniela Littmann, Johann Schneider, Alexander Schulz, and Christoph K. Thomas. "The NY-Ålesund TurbulencE Fiber Optic eXperiment (NYTEFOX): investigating the Arctic boundary layer, Svalbard." Earth System Science Data 13, no. 7 (July 14, 2021): 3439–52. http://dx.doi.org/10.5194/essd-13-3439-2021.

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Abstract. The NY-Ålesund TurbulencE Fiber Optic eXperiment (NYTEFOX) was a field experiment at the Ny-Ålesund Arctic site (78.9∘ N, 11.9∘ E) and yielded a unique meteorological data set. These data describe the distribution of heat, airflows, and exchange in the Arctic boundary layer for a period of 14 d from 26 February to 10 March 2020. NYTEFOX is the first field experiment to investigate the heterogeneity of airflow and its transport of temperature, wind, and kinetic energy in the Arctic environment using the fiber-optic distributed sensing (FODS) technique for horizontal and vertical obser
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Conceição, Eusébio, João Gomes, Maria Manuela Lúcio, and Hazim Awbi. "Development of a Double Skin Facade System Applied in a Virtual Occupied Chamber." Inventions 6, no. 1 (March 4, 2021): 17. http://dx.doi.org/10.3390/inventions6010017.

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In this study a system constituted by seven double skin facades (DSF), three equipped with venetian blinds and four not equipped with venetian blinds, applied in a virtual chamber, is developed. The project will be carried out in winter conditions, using a numerical model, in transient conditions, and based on energy and mass balance linear integral equations. The energy balance linear integral equations are used to calculate the air temperature inside the DSF and the virtual chamber, the temperature on the venetian blind, the temperature on the inner and outer glass, and the temperature distr
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Tong, Zheming, and Hao Liu. "Modeling In-Vehicle VOCs Distribution from Cabin Interior Surfaces under Solar Radiation." Sustainability 12, no. 14 (July 8, 2020): 5526. http://dx.doi.org/10.3390/su12145526.

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In-vehicle air pollution has become a public health priority worldwide, especially for volatile organic compounds (VOCs) emitted from the vehicle interiors. Although existing literature shows VOCs emission is temperature-dependent, the impact of solar radiation on VOCs distribution in enclosed cabin space is not well understood. Here we made an early effort to investigate the VOCs levels in vehicle microenvironments using numerical modeling. We evaluated the model performance using a number of turbulence and radiation model combinations to predict heat transfer coupled with natural convection,
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Rozprawy doktorskie na temat "Radiator airflow distribution"

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Ng, Eton Yat-Tuen, and eton_ng@hotmail com. "Vehicle engine cooling systems: assessment and improvement of wind-tunnel based evaluation methods." RMIT University. Aerospace, Mechanical and Manufacturing Engineering, 2002. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080422.100014.

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The high complexity of vehicle front-end design, arising from considerations of aerodynamics, safety and styling, causes the airflow velocity profile at the radiator face to be highly distorted, leading to potentially reduced airflow volume for heat dissipation. A flow visualisation study showed that the bumper bar significantly influenced the cooling airflow, leading to three-dimensional vortices in its wake and generating an area of relatively low velocity across at least one third of the radiator core. Since repeatability and accuracy of on-road testing are prejudiced by weather condit
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Części książek na temat "Radiator airflow distribution"

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Sethuramalingam, Ramamoorthy, and Abhishek Asthana. "Design Improvement of Water-Cooled Data Centres Using Computational Fluid Dynamics." In Springer Proceedings in Energy, 105–13. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63916-7_14.

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AbstractData centres are complex energy demanding environments. The number of data centres and thereby their energy consumption around the world is growing at a rapid rate. Cooling the servers in the form of air conditioning forms a major part of the total energy consumption in data centres and thus there is an urgent need to develop alternative energy efficient cooling technologies. Liquid cooling systems are one such solution which are in their early developmental stage. In this article, the use of Computational Fluid Dynamics (CFD) to further improve the design of liquid-cooled systems is discussed by predicting temperature distribution and heat exchanger performance. A typical 40 kW rack cabinet with rear door fans and an intermediate air–liquid heat exchanger is used in the CFD simulations. Steady state Reynolds-Averaged Navier–Stokes modelling approach with the RNG K-epsilon turbulence model and the Radiator boundary conditions were used in the simulations. Results predict that heat exchanger effectiveness and uniform airflow across the cabinet are key factors to achieve efficient cooling and to avoid hot spots. The fundamental advantages and limitations of CFD modelling in liquid-cooled data centre racks were also discussed. In additional, emerging technologies for data centre cooling have also been discussed.
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Streszczenia konferencji na temat "Radiator airflow distribution"

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Ruijsink, Rick, John Hoorneman, and Coen Mulders. "The Measurement of the Distribution of the Airflow Through a Radiator." In Vehicle Thermal Management Systems Conference. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1993. http://dx.doi.org/10.4271/931105.

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Raza, Hammad, Suraj Somanna Porangada, Wahidul Islam, Mohammed Naviwala, and Jobaidur Rahman Khan. "Performance Enhancement in Unconventional Radiator." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-70255.

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A number of cars are found to have an unconventional radiator. The radiator is placed at the back of the car instead of front, for which the radiator does not get the incoming airflow to cool the engine down and the engine gets overheated very easily. In order to deal with this problem, a channel has mounted at the top of the vehicle to navigate incoming air flow and direct it through the radiator to cool down the engine. The channel that is provided has three cases, which will indicate the different way of studying this problem. Both steady and transient state analysis has been performed. Eac
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Xie, J., and R. S. Amano. "Cooling Flow Simulation in the Enclosure of Mobile Generator." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-60291.

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A thermal and airflow simulation model is developed for three-dimensional cooling flow study of ventilation and heat transfer inside a mobile generator’s enclosure. The purpose of this design is to achieve better sound attenuation while keeping proper cooling of the engine and generator. This paper focuses its objectives on the adjustment and improvement of cooling performances of some design factors like vent size, vent positions, fan’s flow rate and airflow route based on the CFD approach. A zero-equation HVAC turbulence model was employed and the simulation results were compared with the st
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Islam, Wahidul, and Jobaidur Rahman Khan. "Transient Analysis of Air Flow in a Channel for Unconventional Radiator." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-88327.

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A number of cars are found to have an unconventional radiator. The radiator is placed at the back of the car instead of front, for which the radiator does not get the incoming airflow to cool the engine down and the engine gets overheated very easily. In order to deal with this problem, a channel has been mounted at the top of the vehicle to navigate incoming air flow and direct it through the radiator to cool down the engine. Three channels are tested computationally with three different lengths, which indicates the different way of studying this problem. Transient state analysis has been per
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Swanson, L. W., D. K. Moyeda, and B. A. Folsom. "A Thermal Model for Concentric-Tube Overfire Air Ports." In ASME 2003 Heat Transfer Summer Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ht2003-47025.

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A quasi-steady multi-mode heat-transfer model for boiler concentric-tube overfire air ports has been developed that predicts the effect of geometry, furnace heat source and heat sink temperatures, axial injector wall conduction, and coolant flow rate on the tube wall temperature distributions. The model imposes a radiation boundary condition at the outlet tip of the ports, which acts as a heat source. The model was validated using field data and showed that both the airflow distribution in the ports and tube diameter can be used to control the maximum tube wall temperature. This helps avoid tu
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Kruger, Sunita, and Leon Pretorius. "An Assessment of Different Boundary Conditions in a Naturally Ventilated Venlo-Type Greenhouse." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22849.

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This paper presents a parametric study of the indoor climate of a four span greenhouse subjected to natural ventilation. The effect of different heat fluxes through the greenhouse covering on the airflow patterns as well as temperature and velocity distributions were determined. Appropriate effective heat flux boundary conditions were introduced in the CFD model to investigate temperature and velocity distributions at plant level. Initially, three different simulations were done to represent zero wind speed conditions. Secondly, a velocity of 1m/s was specified at the domain inlet boundary. Re
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Beedie, David, Christopher Knight, Matthew Horsfield, and Roy Moobola. "A Thermal-Electrochemical Model of a Fuel Cell Stack Block." In ASME 2011 9th International Conference on Fuel Cell Science, Engineering and Technology collocated with ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/fuelcell2011-54829.

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RRFCS is developing SOFC fuel cell stack and system technology for a hybrid power generation system. RRFCS is also developing state of the art numerical prediction tools that will be used to support fuel cell product design. One such tool, the Block Thermal Model, is based in the FEMAP-TMG thermal model generator package. This paper describes the constituents of the block and the physics modelled, presents the initial results and states the computer resources used. Full validation could be a subject for later publication. In the RRFCS stack block, aerothermal physics in the anode and cathode g
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Yang, Haoqi, Qingzhen Yang, Saile Zhang, Huicheng Yang, and Yubo He. "Study on the Influence of Film Cooling on the Flow Field and Infrared Radiation Characteristics in the Divergent Section of a Nozzle." In ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/gt2020-16247.

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Abstract As the last part of the convergent divergent nozzle, the divergent section is exposed to high temperature and high-speed airflow and thus, it is more easily to be detected by the infrared detector. It is one of the main sources of the infrared radiation in the exhaust system. Film cooling is applied to protect the wall from hot flow and reduce the infrared radiation. In this paper, the study is conducted on a nozzle with spherical convergence flap in a turbofan engine exhaust system. The effect of film cooling on the internal flow and infrared radiation characteristics of the exhaust
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Hicks, R. A., and C. W. Wilson. "Comparison Between Measured and Predicted Wall Temperatures in a Gas Turbine Combustor." In ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/99-gt-059.

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On of the major considerations in the development of advanced gas turbine engines are increased thrust to weight ratio and reduced development and operating costs. Improvements in engine thrust require an increase in combustion chamber heat release and inlet pressures. However, increasing the amount of heat release will also result in an increase in the radiative heat flux to the combustion chamber walls, proving detrimental to the operational life time of the combustor. To maximise combustor life, different cooling devices can be incorporated into the combustion chamber design. The effectiven
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Khalil, Essam E. "Holistic Approach to Green Buildings From Construction Material to Services." In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-70283.

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Attempts to adequately design an optimum HVAC airside system that furnishes comfort and air quality in the air-conditioned spaces with efficient energy consumption represent a great challenge. Air conditioning identifies the conditioning of air for maintaining specific conditions of temperature, humidity, and dust level inside an enclosed space. The conditions to be maintained are dictated by the need for which the conditioned space is intended and comfort of users. So, the air conditioning embraces more than cooling or heating. The comfort air conditioning is defined as “the process of treati
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