| Keywords |
Solar thermal hot water system; Solar fraction; LCC; Lodging facilities; Apartment |
| Abstract |
This study presents the appropriate Solar Fraction for solar hot water systems according to seasonal heat load distribution and hot water usage patterns, based on case analyses of buildings with high domestic hot water demand where solar thermal systems have been applied. For this purpose, five types of buildings were selected and analyzed among apartment and lodging facilities that have relatively large collector areas and reflect seasonal variations in thermal load distribution. The analysis results indicate that, when both economic feasibility and system efficiency are considered, the optimal solar fraction is approximately 45?50% for buildings where the summer hot water load accounts for about 30?100% of the winter load, while buildings with relatively uniform year-round hot water loads show an optimal value of around 55%. |