| Title |
Deriving Investment Priorities for PV, BIPV, and ESS in Public Building Design |
| Authors |
오진웅(Oh, Jin-Woong) ; 정나연(Jung, Na-Yeon) ; 정다혜(Jung, Da-Hye) ; 안용한(Ahn, Yong-Han) ; 장한별(Jang, Han-Byeol) |
| DOI |
https://doi.org/10.5659/JAIK.2026.42.9.83 |
| Keywords |
Life Cycle Cost (LCC); Photovoltaics (PV); Building-Integrated Photovoltaics (BIPV); Energy Storage System (ESS) |
| Abstract |
This study develops a hybrid Life Cycle Cost (LCC) analysis framework based on ISO 15686-5 to evaluate the economic feasibility of
photovoltaic (PV), Building-Integrated Photovoltaics (BIPV), and Energy Storage Systems (ESS) in public buildings and to derive investment
priorities under budget constraints. Twelve system scenarios were analyzed over 40 years at a 4.5% social discount rate using actual 2025
design cost data. Among single-system scenarios, BIPV 100% (S4) achieved the highest economic feasibility with an NPV of approximately
KRW 398 million, a B/C ratio of 2.39, and an IRR of 19%, driven by a high policy adjustment factor (k_policy = 6.12). The combined PV
?BIPV scenario (S7) was identified as the optimal hybrid configuration with an NPV of KRW 149 million. ESS-inclusive scenarios showed
consistently low economic viability due to recurring battery replacement costs and round-trip energy losses. The proposed CAPEX?NPV
matrix offers a practical decision-support tool for optimal system selection at the building design stage. |