我国负荷计算方法仍采用冷负荷系数法,相对保守和落后.热平衡方法是最准确的负荷计算方法.在同时发生设计日生成方法研究中,比较和评价了传递函数方法和辐射时间序列方法(Radiant Time Series Method,RTSM),尚未对热平衡方法(Heat Blance Method,HBM)与RTSM进行对比和评价研究.本文首先用HBM生成同时发生设计日H,用RTSM生成同时发生设计日R.用HBM和RTSM计算样本房间同时发生设计日H的设计负荷差异率,评价这2种负荷计算方法的准确性.结果表明,用HBM计算的各代表城市95％样本房间同时发生设计日的设计负荷差异率分布范围比RTSM小.用HBM计算样本房间同时发生设计日H和R的设计负荷差异率,评价这2种同时发生设计日生成方法在工程应用中的适用性.结果表明,各代表城市95％样本房间同时发生设计日R的设计负荷差异率分布范围比同时发生设计日H小.综上表明,HBM比RTSM计算设计负荷更准确,RTSM生成的同时发生设计日比HBM生成的同时发生设计日更适合工程应用.
Evaluation of Coincident Design Day Generated by Heat Balance Methodand Radiation Time Series Method
The cooling load coefficient method is still used in China,which is relatively conservative and backward,while the heat balance method is the most accurate cooling load calculation method.In the study of coincident design day generation methods,the heat balance method(HBM)and radiation time series method(RTSM)were compared and evaluated.In this paper,HBM was used to generate coincident design day H,and RTSM to generate coincident design day R.To evaluate the accuracy of these two cooling load calculation methods,HBM and RTSM were used to calculate the design cooling load difference rate of coincident design day H for sample rooms.The results show that the distribution range of the design cooling load difference rate calculated by HBM is smaller than that by RTSM for 95％sample rooms in each representative city.To evaluate the applicability of these two methods for generating coincident design days in engineering applications,HBM was used to calculate the design cooling load difference rate of coincident design days H and R for sample rooms.The results show that the design cooling load difference rate of coincident design day R is smaller than coincident design day H for 95％sample rooms in each representative city.In conclusion,the heat balance method is more accurate than the radiation time series method in calculating the design cooling load,and the coincident design day generated by the radiation time series method is more suitable for engineering applications than the coincident design day generated by the heat balance method.
heat balance methodradiation time series methodcoincident design daydesign cooling load difference ratedesign cooling load benchmark
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