Analytical study on the heat transfer characteristics of a spirally coiled circular fin-tube evaporator operated under non-frosting conditions

Mooyeon Lee, Taehyung Kang, Yong Chan Kim, Jaejung Park

Research output: Contribution to journalArticle

Abstract

The objective of this study is to predict the heat-transfer performance of a spirally coiled circular fin-tube evaporator in which either R134a or R600a was used; this heat-transfer performance was predicted by varying the mass flow rate, inlet air temperature, air flow rate, and tube thickness. Mean deviation for the analytical model from the measured data was ±8.3%. Simulation results revealed that at a given mass flow rate, the heat-transfer rate of the evaporator using R600a was higher than that usingR134a because the enthalpy of the former is higher than that of the latter at the given conditions. The heat-transfer rate of both refrigerants increased with an increase in the air flow rate and inlet air temperature but decreased with an increase in the tube thickness.

Original languageEnglish
Pages (from-to)105-112
Number of pages8
JournalTransactions of the Korean Society of Mechanical Engineers, B
Volume35
Issue number2
DOIs
Publication statusPublished - 2011 Feb 1

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Fins (heat exchange)
Evaporators
Flow rate
Heat transfer
Air intakes
Refrigerants
Air
Analytical models
Enthalpy
Temperature

Keywords

  • Evaporator
  • Heat transfer
  • Spirally-coiled circular fin-tube
  • Tube-by-tube

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

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abstract = "The objective of this study is to predict the heat-transfer performance of a spirally coiled circular fin-tube evaporator in which either R134a or R600a was used; this heat-transfer performance was predicted by varying the mass flow rate, inlet air temperature, air flow rate, and tube thickness. Mean deviation for the analytical model from the measured data was ±8.3{\%}. Simulation results revealed that at a given mass flow rate, the heat-transfer rate of the evaporator using R600a was higher than that usingR134a because the enthalpy of the former is higher than that of the latter at the given conditions. The heat-transfer rate of both refrigerants increased with an increase in the air flow rate and inlet air temperature but decreased with an increase in the tube thickness.",
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