This paper describes energy conservation measures (ECMs) for building energy efficiency improvement and presents a method and process of economic impact analysis of ECMs in terms of energy and cost savings. ECMs have various measures including operation and maintenance improvements, retrofit activities or renewable energy sources. Most of these measures need investment expense for installation or replacement of facilities. Thus, it is not easy for building owners and energy managers to figure out the detailed cost saving and the payback period. To analyze economic impacts, this paper simulates the energy and cost savings, greenhouse gas emission reduction and payback period and examines the simulation results to verify the effects of ECMs.
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