夏季空调室外计算参数确定方法分析及探讨
Analysis and discussion on determination method of outdoor design conditions for summer air conditioning
摘要：
目前我国以50 h不保证时长选取夏季空调室外计算参数，并以此生成设计日进行室内负荷计算及设备选型。这种夏季空调室外计算参数确定体系没有反映空调系统对于室内热环境的保障效果。选取广州、上海及天津为建筑热工分区代表城市并构建相应建筑模型，以室内负荷不保证时长为指标评价当前我国夏季空调室外计算参数确定方法。结果表明：3个城市中，以不保证50 h的夏季空调室外计算参数确定的室内负荷不保证时长均不超过10 h；其他不保证时长下与上述规律类似；3个算例中室内外不保证时长呈线性关系。不同建筑模型的验证也证实了室内外不保证时长间量级差异及线性关系的普遍性。
Abstract：
At present, Chinese HVAC design code determines outdoor design conditions for summer air conditioning and generates the design day based on 50 non-guaranteed hours in the air conditioning system design and equipment selection. The determination system of outdoor design conditions for summer air conditioning can not reflect the effect of air conditioning system on indoor thermal environment. Selects Guangzhou, Shanghai and Tianjin as representative cities with typical climate characteristics, and establishes corresponding office building models. Takes the non-guaranteed hours of indoor cooling load as the index of indoor thermal environment risk level. The results show that in the three cities, the non-guaranteed hours of indoor cooling load are lower than 10 hours when outdoor design conditions for summer air conditioning are selected based on 50 non-guaranteed hours. There are similar results for other non-guaranteed hours. There is a linear relationship between the two non-guaranteed hours in the three examples. The simulation of different building models confirms the universality of the magnitude difference and linear relationship of the two non-guaranteed hours.
Keywords:outdoor design conditions for summer air conditioning, non-guaranteed hours, magnitude difference, linear relationship, load calculation