하이브리드 배기가스용 고온재생기의 흡수액 출구조건에 따른 성능특성에 대한 실험적 연구

Metadata Downloads
Issued Date
Recently, the ozonosphere depletion and greenhouse effect was caused by using the CFCs and HCFs refrigerant into a heat pump and it have become more and more serious. Therefore, usage of existing refrigerant has regulated through the International agreement. The absorption chiller-heater using just the natural refrigerants has very little effects on the environmental pollution.
In the absorption chiller-heater, the HTG(high-temperature generator) using exhaust gas is an important factor to achieve high system performance. To investigate performance of the HTG using exhaust gas in the absorption chiller-heater, Lab. scale HTG using exhaust gas was designed and setup. Since it is very difficult to uses and control the 500oC exhaust gas, the experiment was performed using 200oC air instead of 500oC exhaust gas by using the dimensionless scaling method. It is very important to investigate the performance change of high temperature regenerator using exhaust gas according to the inlet condition of the exhaust gas and absorbing solution.
In this study, to analysis the performance of the HTG using exhaust gas in the absorption chiller-heater with operating conditions, the inlet condition of solution liquid and exhaust gas was changed. The Wilson Plot method for the exhaust gas of HTG was used to develop heat transfer coefficient of a fluid.
As the results, the more steam would be separated from absorption liquid within the HTG with the increase of the inlet temperature at air side. The 1st-outlet port of high-temperature generator shows more steam generation compared to that of other position port because it is located at the inlet of hot air which can supply most heat. Besides, the heat transfer efficiency of the HTG increases due to higher heat capacity and Re number with an increase of air mass flow ratio. As the air mass flow ratio increases from 80% to 120%, the heat capacity of 1st-, 2nd-, and 3rd-outlet port increases by 39.2%, 37.9%, 35.9%, respectively. When the absorption liquid outlet temperature is increased, the temperature difference between air and absorption liquid decreased. Thus, heat exchange rate is gradually decreased. Since the entropy increase rate increase of absorption liquid at outlet side is bigger than that of absorption liquid at inlet side, the heat capacity of HTG is decreased. When the inlet temperature of absorption liquid for 1st-, 2nd-, and 3rd-outlet port, the heat capacity of the HTG is increased by 14.5%, 17%, 14.8%, respectively. With the increase of the mass flow rate of absorption liquid at each outlet, the capacity of the HTG increased. when the mass flow rate of absorption liquid varies from 80% to 120%, the heat capacity of HTG at 1st-, 2nd-, and 3rd-outlet port is increased by 7.4%, 6.5%, 8.19%, respectively.
Wilson Plot method for the exhaust gas of high temperature regenerator was used to develop inlet and outlet tube heat transfer coefficient of fluid. As a result, index of Pr and Re number is 0.4 and 0.679, respectively.
Alternative Title
Experimental study on the performance characteristics with a variation of outlet port of the high-temperature generator for using hybrid exhaust gas
Alternative Author(s)
Kwak, Myoung Seok
일반대학원 기계공학과
Awarded Date
Table Of Contents

Contents ⅰ
List of Figures ⅲ
List of Tables ⅶ
Nomenclature ⅷ

제 1 장 서 론 1
제 1 절 연구 배경 1
제 2 절 고효율 흡수식 냉동기의 기술개발 현황 5
1. 고효율 흡수식 냉온수기 6
2. 폐열활용 흡수식 냉온수기(배기가스, 엔진 냉각수 활용) 9
3. 고효율 복합열원 하이브리드 흡수식 냉온수기 10
4. 국내ㆍ외 관련 기술의 현황 11
제 3 절 기존연구 동향 14
제 4 절 연구목적 16

제 2 장 배기가스용 고온재생기 실험장치 및 조건 17
제 1 절 배기가스 구동 고온재생기 설계 17
1. 핀-관 열교환기 20
2. 엘리미네이터 (Eliminator) 21
3. 희용액 분배기 22
4. 농용액넘이 받이 22
제 2 절 Lab. scale 배기가스 고온재생기 실험장치 23
1. Lab scale 배기가스 고온재생기 실험장치 및 설계 23
제 3 절 배기가스 고온재생기의 실험조건 49
1. 배기가스 물성치 상사 49
2. 고온재생기 및 공기열원의 열량계산 방법 55
3. Wilson Plot 방법을 이용한 내ㆍ외측 열전달계수 산출을 위한 실험조건 57

제 3 장 실험 결과 및 고찰 60
제 1 절 공기측 조건에 따른 고온재생기 성능특성 분석 60
1. 공기측 입구온도에 따른 성능특성 분석 60
2. 공기측 질량유량에 따른 성능특성 68
제 2 절 흡수액 조건에 따른 고온재생기 성능특성 분석 76
1. 흡수액측 입구온도에 따른 성능특성 분석 76
2. 흡수액측 질량유량에 따른 성능특성 분석 84
제 3 절 Wilson Plot 방법을 적용한 열전달계수의 계산 92

제 4 장 결 론 95

Reference 98
조선대학교 대학원
곽명석. (2013). 하이브리드 배기가스용 고온재생기의 흡수액 출구조건에 따른 성능특성에 대한 실험적 연구.
Appears in Collections:
General Graduate School > 3. Theses(Master)
Authorize & License
  • AuthorizeOpen
  • Embargo2012-12-21
Files in This Item:

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.