Reliability research on design of district heating network by stages

Based on the traditional design procedure, divides the design of heating network into two stages, namely, one for topology and the other for diameters and circulating pumps. The corresponding reliability researches are performed for both the structure reservation and transportation capacity reservation. Besides, inserts the design of valve distribution between the above stages to cater for the need of reliability analysis. According to different conditions and design contents during each stage, puts forwards the failure judgment principles, reliability evaluating indicators and analysis methods for each stage.