Calculation of air conditioning load for public area of underground railway station

Based on psychrometric chart, presents a new thought of air conditioning load calculation for public area of underground railway station. Combined with design codes and related manuals, discusses the reasonable value of outdoor air rate per person, and presents the suggested value. Puts forward that hourly air conditioning load should be calculated for public area. Taking all stations of one underground railway line as an example, calculates the minimum air change rate according to indoor dust concentration. The result shows that the calculated values are lower than 5 h^-1 on average. Analyses the influence of apparatus dew point on calculation result of air conditioning load, and presents the suggested method of determining apparatus dew point.