Heating balance point temperature and calculation method of residential buildings in severe cold and cold zones of China

Using the method of theoretical calculation and simulation verification, studies the heating balance point temperature of residential buildings in severe cold and cold zones of China. Analyses the influence of two methods for calculating the total heat gain of buildings on the calculation results of heating balance point temperature, the difference of heating balance point temperature between cities and the difference of heating degree days at different base temperatures. The results show that the method using the whole heating period as the calculation period is suitable for Northeast and North China, but no appropriate method can reflect the real building energy consumption level in the Qinghai-Tibet Plateau. The heating balance point temperature of residential buildings has a certain relationship with the regional cold climate. With the decrease of the outdoor temperature in the cold climate, the heating balance point temperature increases gradually. The heating balance point temperature of 72 representative cities is between 10.6 ℃ and 13.5 ℃. Compared with the base temperature 18 ℃ of heating degree days, taking the balance point temperature as the base temperature, the heating degree days of each city decrease at varying degrees.