Characteristics of a micro-fin evaporator: Theoretical analysis and experimental verification

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Zheng Hui-Fan ; Fan Xiao-Wei ; Wang Fang ; Liang Yao-Hua (2013)
  • Publisher: VINCA Institute of Nuclear Sciences
  • Journal: Thermal Science (issn: 0354-9836)
  • Related identifiers: doi: 10.2298/TSCI1305443Z
  • Subject: micro-fin evaporator | simulation | R290 | R717 | heat capacity | Mechanical engineering and machinery | TJ1-1570

A theoretical analysis and experimental verification on the characteristics of a micro-fin evaporator using R290 and R717 as refrigerants were carried out. The heat capacity and heat transfer coefficient of the micro-fin evaporator were investigated under different water mass flow rate, different refrigerant mass flow rate, and different inner tube diameter of micro-fin evaporator. The simulation results of the heat transfer coefficient are fairly in good agreement with the experimental data. The results show that heat capacity and the heat transfer coefficient of the micro-fin evaporator increase with increasing logarithmic mean temperature difference, the water mass flow rate and the refrigerant mass flow rate. Heat capacity of the micro-fin evaporator for diameter 9.52 mm is higher than that of diameter 7.00 mm with using R290 as refrigerant. Heat capacity of the micro-fin evaporator with using R717 as refrigerant is higher than that of R290 as refrigerant. The results of this study can provide useful guidelines for optimal design and operation of micro-fin evaporator in its present or future applications.
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