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This study investigated the power consumption of convenience stores in Taiwan. Convenience stores are the most densely structured commercial buildings in Taiwan. This study sampled 1316 convenience stores. The annual average power consumption of the 1,316 convenience stores was 167,000 [kWh] per store. On the basis of an average power rate of 3.5 [NTD/kWh], the annual average power expense per store is 580,000 NTD. As there are 9,465 convenience stores in Taiwan, the annual power consumption of all convenient stores will be 1.6 billion [kWh]. This study conducted a statistical analysis of the quantity and wattage of the power-consuming equipments in convenience stores. Architectural forms were divided into four types, namely, one-storey houses, street stores, one-sided arcades and double-sided arcades. The number of sides with windows included one side, two sides, and three sides. There were eight door directions. The number of customers was also a variable. The annual accumulated wattage and EUI（EUI，Energy Use Intensity） were used as basic information of the statistical analysis to discuss the impact of the architectural forms of the convenience stores on energy consumption. The annual power consumption per unit area for one-story convenience stores was 1,368 [kWh/m2]. However, the average power consumption was up to 175,476 [kWh], which was the highest among the four architectural forms of convenience stores. The maximum average annual accumulated power consumption of one-story houses increased by 8% as compared to the minimum annual average power consumption of one-sided arcades. The average annual accumulated power consumption of convenience stores with windows on three sides increased by 2% as compared to the average annual accumulated power consumption of the street stores. Thus, architectural forms and number of open windows had a minor impact on the total power consumption. For the estimated formula, the data obtained from the annual energy consumption monitoring of equipment in the six stores are used as the basis for the equipment. The proposed estimated energy consumption formula was verified using two convenience stores. The difference between the actual power consumption and result of the estimated formula was 5%~7%. The proposed formula was simple and could be applied to new and old convenience stores. It could evaluate and determine the energy consumption of convenience stores in a short time, so as to achieve the energy efficiency of convenience stores.
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