基于计算法的夏季空调室外计算湿球温度探讨
Discussion on outdoor design wet-bulb temperature for summer air conditioning based on calculation method
摘要：
依据ASHRAE手册，分别采用试算法、牛顿迭代法及经验系数法计算了我国严寒地区、寒冷地区、夏热冬冷地区、夏热冬暖地区以及温和地区的5个典型代表城市的夏季空调室外计算湿球温度，对比了现行规范中各城市相对应的设计参数。结果表明，采用试算法和牛顿迭代法统计夏季空调室外计算温度时，其统计结果与现行规范中设计参数的相对误差范围为1.25%～2.98%；采用经验系数法统计夏季空调室外计算温度时，其统计结果与现行规范中设计参数的相对误差范围为1.16%～2.19%。此外，采用湿球温度计算法统计夏季空调室外计算湿球温度时，其统计结果的比焓与查图法所得设计参数比焓较为接近，可用于湿度控制系统及空调系统的设计。认为湿球温度计算法可应用于夏季空调室外计算湿球温度的统计中。
Abstract：
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.
Keywords:wet-bulb temperature, trial method, Newton iteration method, empirical coefficient method, outdoor design wet-bulb temperature for summer air conditioning