Transactions of the Korean Society of Machine Tool Engineers (한국공작기계학회논문집)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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An Application of Optimum Heat Exchanger for the Grasp on Performance Characteristics of $NH_3$ Refrigeration System

  • Ha Ok Nam (Department of Mechanical Engineering, Chosun University) ;
  • Kwon Il Wook (MYCOM Korea Chemical Plant Co., Ltd) ;
  • Hong Suck Ju (Department of Mechanical Engineering, Chosun University) ;
  • Kim Jae Yeol (Department of Mechanical Engineering, Chosun University) ;
  • Lee Jong In (Department of Automobile, Chosun College of Science & Technology) ;
  • Jeon Sang Sin (Graduate School, Department of Mechanical Engineering, Chosun University) ;
  • Ha Kyung Soo (Graduate School, Department of Mechanical Engineering, Chosun University) ;
  • Lee Seung Jae (Graduate School, Department of Mechanical Engineering, Chosun University) ;
  • Park Chan Soo (Graduate School, Department of Mechanical Engineering, Chosun University) ;
  • Jeong Song Tae (Graduate School, Department of Mechanical Engineering, Chosun University)
  • Published : 2005.04.01
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Abstract

Since the use of CFC and HCFC refrigerants is to be restricted due to the depletion of ozone layer, this experiment applies the $NH_{3}$ gas to study the performance characteristics from the superheat control for improving the energy efficiency. The experiments are carried out for the condensing pressure of refrigeration system from 1500kPa to 1600kPa by 50kPa and for degree of superheat from $0^{circ}$ to $1^{circ}$ by $10^{circ}$ at each condensing pressure. As a result of experiment, 1) As degree of superheat increased, evaporating pressure of the compressor decreased so equilibrium temperature decreased. And specific volume of refrigerant vapors increased so refrigerant mass flow and heat load of the evaporator decreased. 2) An influence of change of condensing pressure on heat load of the evaporator was insignificant. 3) With the identical degree of superheat, change of compressed temperature was insignificant according to each condensing pressure, so there was little change in enthalpy.4) when the degree of superheat is $0^{circ}$C at each condensing pressure, the refrigeration system has the hi띤est performance.

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References

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