| Title |
Thermal Performance Evaluation of Building Integrated Forced Circulation Solar Water Heater (Part 2: Simulation) |
| DOI |
https://doi.org/10.6110/KJACR.2022.34.9.410 |
| Keywords |
벽체일체형 태양열온수기; 하절기 과열; 동절기 열성능; 수열원 히트펌프 Building integrated solar water heater; Overheating in summer; Thermal performance in winter; Water heat pump |
| Abstract |
In general, flat-plate solar collectors are installed at an angle of 30° or 45° for the best annual thermal performance. Through experiments in previous studies, it was confirmed that the building integrated forced circulation solar water heater was good in thermal performance. However, it is necessary to compare under the same conditions with the 30° and 45° collectors, which were used much more popularly. In this study, it was impossible to experiment with the same environment, so simulation was conducted. Simulation was performed with TRNSYS18, and the simulation model was verified by comparing it with experimental data. As a result of simulation, in the order of 30°, 45°, and 90° of collector inclination angle, the collection efficiency in the winter season was 37.6%, 38.6%, 39.2%, and the solar fraction was 54.2%, 50.3%, 48.1%, respectively. The performance in summer when the load for hot water supply is small is significantly lower than other inclination angles, but there is little risk of overheating due to the low system temperature. |