Discussion on outdoor design wet-bulb temperature for summer air conditioning based on calculation method

According to 2009 ASHRAE handbook,selects five typical cities in severe cold, cold, hot summer and cold winter, hot summer and warm winter and mild zones for calculating outdoor design wet-bulb temperature for summer air conditioning using trial method, Newton iteration method and empirical coefficient method, respectively. Compares them with the corresponding design parameters in current design code. The result shows that the relative error range of the temperature is 1.25% to 2.98% using both trial method and Newton iteration method, and 1.16% to 2.19% using empirical method. Besides, when web-bulb temperature calculation method is used to perform statistical analysis for outdoor design wet-bulb temperature for summer air conditioning, the enthalphy obtained from statistics is close to that gained from diagram method, which can be used in the design of humidity control systems and air conditioning systems. Therefore, the calculation method of wet-bulb temperature can be used in statistics of outdoor design wet-bulb temperature for summer air conditioning.