표제지
목차
Abstract 10
Nomenclature 12
제1장 서론 14
1.1. 연구 배경 14
1.2. 종래 연구 15
1.3. 연구 목적 16
제2장 연구 이론 17
2.1. 태양열 집열 시스템 17
2.2. 태양열 공기-물 가열기 19
제3장 운전조건에 따른 공기-물 가열기의 집열성능 실험 20
3.1. 실험 장치 20
3.2. 실험 조건 및 실험 방법 22
제4장 결과 및 고찰 26
4.1. 일사량 및 외기 온도 26
4.2. 열매체 입·출구 온도 및 온도차 27
4.3. 공기 및 액체 획득 열량 33
4.4. 풍량 및 유량에 따른 집열효율 36
4.5. 무차원 열효율 39
4.6. 중회귀분석을 활용한 집열기 모델링 및 성능 분석 47
제5장 결론 64
Reference 66
Table 3-1. Dimensions of the solar air-water collector 20
Table 3-2. Experiment conditions 23
Table 3-3. Specifications of measuring devices 24
Fig. 2-1. Schematic diagram of solar air heater system 18
Fig. 2-2. Schematic diagram of solar liquid heater system 18
Fig. 2-3. Schematic diagram of solar air-water heater 19
Fig. 3-1. Experimental apparatus and actual view of air duct of the solar air-water heater 21
Fig. 3-2. Schematic diagram of the air duct used to fabricate solar air-water heater with dimensions 21
Fig. 3-3. Schematic diagram of solar air-water heater 22
Fig. 4-1. Ambient temperature solar irradiation according to operating conditions 26
Fig. 4-2. Change of air temperature according to the operating conditions 28
Fig. 4-3. Inlet and outlet temperature of water according to the operating conditions 30
Fig. 4-4. Change of temperature difference of water and water temperature in tank 32
Fig. 4-5. Comparison of heat gain according to operating conditions 34
Fig. 4-6. Total heat gain according to the operating conditions 35
Fig. 4-7. Comparison of thermal efficiency of the air and water side 37
Fig. 4-8. Total thermal efficiency 38
Fig. 4-9. Variation of air side thermal efficiency 40
Fig. 4-10. Variation of water side thermal efficiency 42
Fig. 4-11. Variation of net thermal efficiency of air 44
Fig. 4-12. Variation of net thermal efficiency of water 46
Fig. 4-13. Comparison of experimental and simulated values for maximum efficiency 48
Fig. 4-14. Comparison of experimental and simulated values for heat loss coefficient 49
Fig. 4-15. Predicted heat gain of air with various (Tw,i-Ta)[이미지참조] 51
Fig. 4-16. Predicted heat gain of water with various (Tw,i-Ta)[이미지참조] 53
Fig. 4-17. Predicted total heat gain with various (Tw,i-Ta) and water flow rate[이미지참조] 57
Fig. 4-18. Predicted net heat gain of air with various (Tw,i-Ta)[이미지참조] 59
Fig. 4-19. Predicted net heat gain of water with various (Tw,i-Ta)[이미지참조] 61
Fig. 4-20. Predicted net heat gain of the system with various (Tw,i-Ta)[이미지참조] 63