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Taiwan has a low energy production rate. According to the statistics of Bureau of Energy, Ministry of Economic Affairs, the energy production rate of Taiwan is lower than 1%; however, Taiwan''s power consumption increases year after year, especially in commercial buildings. The power consumption has grown to an annual growth rate of over 11.7%. Therefore, it is necessary to take reasonable control. Germany began to evaluate the energy utilization efficiency of buildings according to the Energy Performance of Building Directive (EPBD) as early as in January 2006, in order to emirate the high power-wasting buildings from the market gradually.
According to the statistics in the Technical Manual of Supermarket Energy-saving (2002), the annual power consumption of a fresh food supermarket is as high as 1,140,000 kWh, and the monthly average power consumption is 95,000 kWh. The fresh food supermarket is thus classified as a high energy consuming building. However, the Technical Manual of Supermarket Energy-saving (2002) is outdated, and the main items sold in fresh food supermarkets and supermarkets are different. The fresh food supermarket uses many refrigerating equipments to keep food fresh, and the present power efficiency of equipments is better. The fresh food supermarket needs to evolve constantly in competition, and investigate the competitive factors, thus providing references to the promotion of "Energy Certificate System" in the future.
The area of the fresh food supermarket used in this study is 1,401 to 1,800[m2], the annual average customer volume is about 350,000 person-times, the average annual power consumption is 959,165 [kWh/yr], and the average energy use intensity (EUI) is 604 [kWh/(m2.yr)]. In addition, the new and old equipments in the supermarket have different power consumptions. For example, the annual power consumption of recently founded DCN branch is only 74% of CK branch. The two branches have equivalent total area, but there is a difference of 26% in annual power consumption. By analyzing the space, power consumption, building construction form and planar configuration type of fresh food supermarket, based on the conclusion of investigation on the equipments of five real cases, the standard fresh food supermarket model is built. The equipment capacity of the standard fresh food supermarket model built in this paper consists of refrigerating equipment (40.0%), air-conditioning equipment (32.1%), lighting equipment (10.4%), and other equipments (17.4%). The total equipment capacity is 145,833[W]. The space equipment capacity is discussed. The shopping space is 42.0%, and the machine room is the source of refrigeration capacity of refrigerating equipments. Therefore, the machine room equipment capacity is as high as 37.5%, followed by food processing area, office area and other areas.
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