建筑内部排水系统设计秒流量公式讨论

Discussion on design-second-flow formula for drainage system in buildings

简述了现行建筑给水排水设计规范规定的排水系统设计秒流量计算方法。指出由于用水的随机性,生活污水设计秒流量与给水设计秒流量计算方法的一致性,以及所考虑的影响因素和多个器具同时出流时水流的扰动变化等方面存在问题,认为在计算生活污水设计秒流量时应采用概率法。同时推导出了生活污水设计秒流量的计算式,并作了实例计算分析。

The method of design-second-flow calculation for drainage system specified in the Code for design of building water supply and drainage was summarized. It was pointed out that, the said method took no consideration of randomicity of water supply, consistency of calculation methods between domestic sewerage design-second-flow and water supply design-second-flow, moreover, the formula could not properly calculation of the flux and the disturbance variations of flow when several appliances illustrate all factors affect the in use at the same time. In view of those existing problems, Probability method was presented to be the proper method for the design-second-flow calculation of domestic drainage and the calculation formular was der/vated at the same time, and an example was also given to support the theory.