R-1233zd(E) 냉매를 이용한 유하액막 증발기의 열전달 성능 측정 및 유동 가시화에 관한 실험적 연구
- Resource Type
- Academic Journal
- Authors
- 김우경 (Wookyoung Kim); 김학수 (Hak Soo Kim); 김정철 (Jungchul Kim); 김동호 (Dong Ho Kim)
- Source
- 설비공학논문집. 2024-01 36(1):9-17
- Subject
- Falling film evaporator(유하액막 증발기)
Flow and thermal characteristics(열유동 특성)
Heat transfer coefficient(열전달계수)
R-1233zd(E) refrigerant(R-1233zd(E) 냉매)
- Language
- Korean
- ISSN
- 1229-6422
2465-7611
This study was performed to measure the thermal performance and visualize the flow behavior of a falling film evaporator using R-1233zd(E) refrigerant. The effect of film Re on the thermal performance of the evaporator was experimentally identified using photography and thermometry. The heat transfer coefficient of falling evaporation using R-1233zd(E) refrigerant on each tested tube was evaluated and compared to the flow visualization results. As the film Re of each tube increased, the heat transfer coefficient of each tube increased until a certain film Re. The flow visualization results showed that the heat transfer coefficient of each tube increased as the wetted fraction of each tube increased. The experimental data showed that the wetted fraction of a tube was a major contributor to the heat transfer coefficient of the tube