Analyses And Improves On Design Method Of Centralized Heating System Networks

This article the rationality design of centralized heating system network, including recommend the heating network hydraulic computation models and hydraulic calculation method, analyze factor which influencing the result of hydraulic computation of heating network, set up centralized heating system network optimization design model, and carry on water pump fit curve research and build water pump database.Firstly, recommend heating network hydraulic computation models。Then show the heating network with matrix adopting the theory of graph, and according to certain assumed conditions has carried on the solving of its model. Then introduced the hydraulic calculation method of dendrite and ring type heating network separately。And has carried on some improvement to the hydraulic calculation method of the ring type heating network. Simplify the pipe network model, improve initial flow method of salary distribution and structure produce trees minimum. Among them consider the minimum square and flow in charge of the length of pipe factor is most important, improved computational efficiency, and could reach the accuracy of adjustment method as soon as possible.There many design parameters in large-scale heating network , in get rid of known or giving design parametering, studied the relation in charge of the equivalent absolute roughness K of the pipe and centralized heating network with resistance head, and the impact on result of hydraulic calculation of different K value.Utilize least square method to set up the characteristic curve return equation of water pump, set up curve formula of the fitting curve of the parallel,serial water pump group connection of the same types,different types, and have studied the performance curve equations of variable speed pump. With colleagues set up the water pump database, used the programs to transfer the water pump database, can select the type of pumps in different operation schemes.At last perfected the mathematics model of ring type heating network...