Investigation on heat transfer and pressure drop correlations of R600a air-cooled finned tube evaporator for fridge

Du, Su; Li, Qingyang; Xue, Changfeng; Song, Qinglu; Wang, Dechang; Li, Yanhui; Lishun, Li; Liu, Jian

doi:10.1016/j.ijrefrig.2022.07.012

Cited by 4 publications

(6 citation statements)

References 17 publications

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“…To investigate the influence of generated heat, the temperature at the refrigerant tube side is fixed at 10 • C. The total heat generation is increased from 80 to 320 W to demonstrate the module temperature under various heat rates. The convection heat transfer coefficient for simulation is fixed at different values ranging from 200 to 300 W/m 2 •K, which is consistent with the flow Reynold number at the refrigerant tube side for the evaporation process within the small tube [26][27][28]. Figure 8 shows the simulated temperature at the middle of the module, and Figure 9 shows the temperature contour of the module with 160 W, 220 W and 320 W of generated heat.…”

Section: Influence Of Generated Heatmentioning

confidence: 70%

“…In practice, the h ref depends significantly on the refrigerant flow rate and the saturated working conditions of the refrigerant, which is under the control of the researchers. This will significantly affect the Reynold number and Prandtl number [26,27,[38][39][40], resulting in variations in the h ref . Hence, this section aims to demonstrate how variations in the h ref affect the BTMS temperature.…”

Section: The Influence Of Convection Heat Transfer Coefficientsmentioning

confidence: 99%

“…As the refrigerant flows through the BTMS (which involves flow equipment with a small channel), if the refrigerant flow rate is high enough, the flow evaporation of the twophase fluid will occur within the refrigerant-side cooling system (small channel or small tubes are mostly used) [26][27][28][29]. Hence, the heat transfer from batteries to the refrigerant occurs under the saturated temperatures of the refrigerant while flowing through the BTMS (working as an evaporator).…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, for a larger scale design, it essentially requires an alternative simulation technique that can simplify the two-phase flow evaporation at the refrigerant tube-side cooling. In this case, the heat transfer performance of the two-phase flow evaporation through the refrigerant tube side can be represented by the convective heat transfer coefficient under a certain saturation temperature as supported by numerous studies [26][27][28][29]. Hence, the flow evaporation at the refrigerant side can be modeled by the convective heat transfer mechanism when the h ref is specified.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the Performance of Battery Thermal Management Based on Direct Refrigerant Cooling: Simulation, Validation of Results, and Parametric Studies

Jamsawang,

Chanthanumataporn,

Sutthivirode

et al. 2024

Energies

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This study proposes a simulation technique for investigating a battery thermal management system based on direct refrigerant cooling (BTMS-DRC). The main focus is to investigate the temperature uniformity and working temperature of the module housing. The simulation technique employs a finite element method for a combined conduction–convection heat transfer to predict the module housing temperature. The refrigerant side is based on two-phase flow evaporation, which is represented by the convection heat transfer under a certain refrigerant saturation temperature. The real BTMS-DRC, which is based on the dual-evaporator vapor compression refrigeration system, is constructed for experimentation with the test bench. The simulated result is validated with the experimental results to ensure correction of the modelling. Error rates of approximately 2.9–7.2% are noted throughout the specified working conditions. The BTMS can produce temperatures of less than 35 °C under conditions where 80–320 W heat is generated. The difference in the temperature of the module is around 1.7–4.2 °C. This study also investigates the impact of heat generation, the convection heat transfer coefficient (href), the refrigerant saturation temperature, and thermal conductivity on the module’s temperature. The thermal conductivity ranges from 25 to 430 W/m·K, while the href ranges from 80 to 400 W/m2·K.

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Section: Influence Of Generated Heatmentioning

confidence: 70%

Section: The Influence Of Convection Heat Transfer Coefficientsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of the Performance of Battery Thermal Management Based on Direct Refrigerant Cooling: Simulation, Validation of Results, and Parametric Studies

Jamsawang,

Chanthanumataporn,

Sutthivirode

et al. 2024

Energies

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“…15 A correlation has been developed to calculate the coefficient of heat transfer and pressure loss due to friction in the evaporator of a refrigerator using R600a. 16 Bashar et al 17 developed the pressure drop correlation for evaporator coils.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Split Air Conditioner with Consideration of Pressure Drop in Evaporator and Condenser

Mishra¹,

Soni

Maheshwari

2022

Curr. World Environ

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In this research, a split air conditioner's performance has been evaluated using exergy analysis on three different low global warming potential (GWP) refrigerants, namely R32, R447A, and R447B, to find a replacement for the GWP-high refrigerant R410A. With regard for pressure loss in the evaporator and condenser, a computational model is built to recreate the operational conditions of a split air conditioner. GENETRON Properties 1.4 software is used to calculate performance metrics such as coefficient of performance (COP), exergy destruction ratio, exergetic efficiency, and efficiency defect. Result shows that pressure drop in evaporator alone has an adverse effect on COP and total exergy destruction and it is higher at higher pressure drop. Effect of pressure drop on exergetic efficiency and exergy destruction ratio is found to be less significant with condenser pressure drop compared to evaporator pressure drop. Exergy efficiency is found to be maximum with R447A followed by R447B, R32, and R410A.

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Electromagnetic effects and accurate wall-temperature measurement method under directly electric heating mode

Lei

Liu

et al. 2023

International Journal of Thermal Sciences

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Investigation on heat transfer and pressure drop correlations of R600a air-cooled finned tube evaporator for fridge

Cited by 4 publications

References 17 publications

Investigation of the Performance of Battery Thermal Management Based on Direct Refrigerant Cooling: Simulation, Validation of Results, and Parametric Studies

Investigation of the Performance of Battery Thermal Management Based on Direct Refrigerant Cooling: Simulation, Validation of Results, and Parametric Studies

Performance Evaluation of Split Air Conditioner with Consideration of Pressure Drop in Evaporator and Condenser

Electromagnetic effects and accurate wall-temperature measurement method under directly electric heating mode

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