Energy consumption of subway stations in China: Data and influencing factors

Subway transportation systems are in rapid development and energy consumption in subway stations is becoming more and more significant. The present paper aims to reveal the electricity consumption of subway stations for non-traction purpose, and data from 341 subway stations in 5 cities in different climate zones in China have been statistically integrated and analyzed. The results demonstrate that the average annual electricity consumption ranges 1.8-2.3 million kWh in underground non-transfer stations. Electricity consumption per unit floor area is taken as the benchmark to evaluate the energy performance with an annual average value of 131-144 kWh/m(2) in each city. The VAC (ventilation and air conditioning) system and lighting system are found in dominant positions of the total electricity consumption, accounting for about 46% and 27% respectively in City A. Influencing factors of the energy consumption are also analyzed, including floor area, annual passengers, CDD (cooling degree days), service year, PSD (platform screen door) system, platform type and number of entrances. These factors are compared and classified into three categories according to the degree of influence on energy consumption. The current information provides references for understanding the energy consumption level and establishing energy consumption standards for subway stations.