宿舍定时集中热水供应系统流量计算与分析

Calculation and Analysis of the Flow of Fixed Time Hot Water Supply System in Dormitory

《建筑给水排水设计标准》(GB 50015—2019)中居室内设卫生间的宿舍按用水分散型建筑采用平方根法计算给水设计秒流量,而定时集中热水供应系统按用水密集型建筑采用同时使用百分数计算设计小时热水量。针对居室内设卫生间的宿舍采用定时集中热水供应系统时如何选择热水给水设计秒流量计算公式的问题,分析了平方根法和同时给水百分数法计算的热水给水设计秒流量与设计小时热水量折算的秒流量之间的关系,得出当淋浴器、洗脸盆数量>340个时,平方根法的计算结果偏小、不合理,建议按同时给水百分数法计算热水给水设计秒流量,并给出了卫生器具同时给水百分数取值表。

According to Standard for Design of Building Water Supply and Drainage(GB 50015-2019), the square root method is used to calculate the design peak flow of the water supply for the dormitory with a private bathroom in the room, while the design hour flow of the hot water consumption of the fixed time hot water supply system is calculated according to the simultaneous water supply percentage in water-intensive-use building. In view of the problem of how to select a formula for calculating the design peak flow of the hot water supply when there is a fixed time hot water supply system in the dormitory with a private bathroom, the relationship between the design peak flow of hot water supply calculated by square root method and that converted by the design hour flow calculated by the simultaneous water supply percentage method was analyzed, and found that the calculation result of square root method was small and unreasonable when the number of showers and washbasins was more than 340. Therefore, it is suggested to calculate the design peak flow of hot water supply by the simultaneous water supply percentage method, and the value table of percentage of simultaneous water supply for sanitary appliances was provided.