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자료유형
학술저널
저자정보
저널정보
대한설비공학회 International Journal of Air-Conditioning and Refrigeration Journal Of Air-Conditioning and Refrigeration Vol.4
발행연도
1996.9
수록면
78 - 91 (14page)

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Concerning the increase of the dangers on enviromental destruction in a global scale, CFC regulations have finally been carried out and some CFC's are expected to be phased out in the near future. Therfore the research for alternative refrigerants is demanded. The major activities related to alternative refrigerants are focused on two different aspects: The development of mixed refrigerants by using the existing refrigerants, and the development of new HFC refrigerants.
One of the most promising alternative refrigerants for CFC-12 is HFC-134a. HFC-134a has often been used as a replacement of CFC-12 for automotive air-conditioners. However, due to the different thermodynamic properties of HFC-134a, performances of the replaced system are degraded compared with those of the CFC-12 system. Sometimes a complete redesign of the system is required.
To design and analyse a new system, a steady-state simulation program could be used. The outputs from this program can also be used to develop dynamic models, which can predict the dynamic behaviors of the system.
Therefore, the summary of this research is as follows : (1) The various thermodynamic properties of HFC-134a are ana lysed and programmed. (2) The model for serpentine heat exchanger is developed and programmed. (3) These subroutines are integrated to develop an automotive air conditioning system simulation program. (4) This developed system simulation program is verified with the test results, and used for the design and analysis of a new automative air conditioning system.

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Abstract

1. Introduction

2. Mathematical Model

3. Model Verification

4. Analysis of the Results

5. Conclusions

References

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