LCCA and LCA to Evaluate Feasibility for Introducing High-Effic iency Motors into Air Ventilation Systems of Public Facilities

摘要

??????? ???? ??????? ?? ??????? ???? ??? ?40%?? ??? ??. ??????? ?????????? ?????? ????????? ???? ??? ???? ????? ???? ??? ????? ? ?? ???? ????? ??? ??. ??? ?? ???? ???? ???? ?????? ?? ?????? ????? ? ??? ????? ?????? ????. ????? ???? ???? ?? ???? ?? ??? ???? LCCA(Life Cycle Cost Analysis)? ????? LCCA? ????? ?? ??????? ???? ??, ????? ???? ??? ??? ??. ????? ???? ?? ???? LCA(Life Cycle Assessment)??? ?? ?? ????? ?????? ?? ???? ??? ???? ???? ??? ???? ??? ??? ??. ?? ? ????? LCCA ? LCA? ??? ??? ?? ? ? ?? ??? ????? ???? ?????? ????? ??? ??? ??? ??? ??? ????? ??. The amount of energy consumed in air ventilation systems of public facilities accounts for 40% of their total energy consumption. To reduce their energy consumption, applying variable speed operation controlled by an inverter with a high-efficiency motor is suggested. Since these methods require higher initial investment costs compared to the existing systems, economic evaluation should be conducted from a long-term perspective. While LCCA(Life Cycle Cost Analysis) model is useful to estimate net savings of alternatives that differs with respect to initial costs and operating costs, the environmental burdens are not considered. On the contrary LCA(Life Cycle Assesment) model is suitable to assess environmental impacts associated with the stages of a product’s life but it does not consider costs. In this study, the high-efficient motors are introduced into the air ventilation system of a subway station and a comprehensive analysis on the economic and environmental impacts of the proposed method is conducted by using LCCA and LCA model.