| Title |
Optimizing the Life Cycle Cost of a Solar Water Heating System in an Office Building Through Simulation |
| Authors |
고명진(Myeong-Jin Ko) ; 최두성(Doo-Sung Choi) ; 장재동(Jae D Chang) ; 김용식(Yong-Shik Kim) |
| Keywords |
사무소 건물 ; 태양열급탕시스템 ; 생애주기비용 ; 최적화 시뮬레이션 Office building ; Solar water heating system ; Life cycle cost ; Optimization simulation |
| Abstract |
This study examined the economics of a solar water heating system for an office building using life cycle cost (LCC) optimization simulations. The numerical simulations were conducted with TRNSYS and GenOpt employing the Hooke-Jeeves algorithm. The solar collector area, slope, mass flow rate per collector area and storage tank volume were selected as the main design parameters of the solar water heating system. The LCC optimization simulations of the system were carried out for cases where water temperature was 60℃ and 50℃. The results showed that for water temperature at 60℃ and 50℃ the collector area could be decreased by 17% and 28%, storage tank volume could be decreased by 49% and 54%, and mass flow rate per collector area increased by 5% and 9% respectively compared to a non-optimized system. The LCC of the system was reduced by 4% for 60℃ and 7% for 50℃. The initial installation cost of the system was reduced by 24% for 60℃ and 34% for 50℃. However, the operating cost of the system increased by 16% for 60℃ and 36% for 50℃ compared to a traditional solar water heating system. |