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R22와 HFC-134a를 사용한 냉동장치의 성능특성 연구

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Author(s)
김종길
Issued Date
2007
Keyword
R22 HFC-134a 냉동장치 응축기 냉동 압축기
Abstract
Nowaday HCFCs refrigerant are restricted because it cause depletion of ozone layer. Accordingly, this experiment apply the HFC-134a and R22 to study the performance characteristic from superheat control and compare the energy effciency of refrigerants from the high performance. The condensing pressure of refrigeration system is increased from 1500kPa to 1600kPa and degree of superheat is increased from 0 to 5℃ at each condensing pressure.
This study conducted the comparative analysis of performance of refrigerating system using HFC-134a and R22 with respect to the change in condensing pressure and superheat and the results are presented as follows.
1. The refrigerant Circulating rate shows similar stability for the condensation pressure and the degree of superheat change in HFC-134a and R22 refrigerant, and The refrigerant circulating rate of R22 is little less than HFC-134a's but the suction pressure of HFC-134a shows a lot less than R22.
2. If the condensation pressure and the degree of superheat is getting higher, refrigerant mass flow rate that incoming in an evaporator is decrease and condenstation rate is getting bigger and power is increase. So energy is getting loss a lot.
3. The requirement power of R22 is higher than HFC-134a and record factor of R22 is higher than HFC-134a but shows similar result.
4. In this research, HFC-134a and R22 shows similar performance quality, if preservation of the refrigeration system is becoming, HFC-134a is appropriate for substitution refrigerant of R22.
Alternative Title
The Study on Comparison of Performance Characteristics in Refrigeration using R22 and HFC-134a
Alternative Author(s)
Kim, Jong-Kil
Affiliation
조선대학교 교육대학원
Department
교육대학원 기계.금속교육
Advisor
하옥남
Awarded Date
2007. 8
Table Of Contents
제 1 장 서론 = 1
제 2 장 관련 이론 = 3
2.1 냉매의 특성 = 3
2.2 R22의 특성 = 8
2.3 HFC-134a의 특성 = 9
2.4 냉동사이클 해석 = 10
2.4.1 이론 냉동사이클 = 10
2.4.2 실제 냉동사이클 = 12
제 3 장 실험장치 = 15
3.1 실험장치 = 15
제 4 장 실험방법 = 20
4.1 응축기 냉각수 온도와 응축압력 = 20
4.2 증발기 냉수 유량조절 = 20
4.3 과열도 제어 = 21
4.4 소요동력 = 21
4.5 냉동 압축기 운전 = 21
4.6 계측기 및 데이터 정리 = 21
제 5 장 실험결과 및 고찰 = 24
5.1 냉매 질량유량 = 24
5.2 압축기 흡입압력 = 27
5.3 응축기냉각수 질량유량 = 29
5.4 응축기냉각수 출구온도 = 31
5.5 응축기 방열량 = 33
5.6 증발기 냉수 출구온도 = 35
5.7 증발기 흡열량 = 37
5.8 소요동력 = 39
5.9 성적계수 = 41
6 결론 = 43
참고문헌 = 44
Degree
Master
Publisher
조선대학교 교육대학원
Citation
김종길. (2007). R22와 HFC-134a를 사용한 냉동장치의 성능특성 연구
Type
Dissertation
URI
https://oak.chosun.ac.kr/handle/2020.oak/4660
http://chosun.dcollection.net/common/orgView/200000234318
Appears in Collections:
Education > Theses(Master)(교육대학원)
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