The Optimizational Design Mtehod In District Heating System With Multi-thermal Source

Heat-supply system with multiple heat is an advanced technology in the network of hot water pipes,based on the development of water pump’s frequency control of motor speed. It is beneficial to the resource conservation, the operation centralized heat supply and the increase of economic benefit. Compared to the traditional centralized heat supply system,The particularity of the heat supply system with multi-heat sources lies in the existence of intersection. With different location of the intersection,each thermal power plants in the system undertake the different heat flux.The power requiremnt for hot water circulation pump. So this paper presents the method of finding the optimal location of the intersection in the centralized heat supply system with multi heat sources.When the location of the intersection strides over one branch of the system, the system running state changes. So this is a discrete manthematics problem, and the solution process is point-by-point method. Firstly,the optimal objective functions were establised, based on the power consumption of circulating water pump and the function, based on the power consumption of circulating water pump and the influence of the two factors. At the same time, this paper taked a pratiical project in jinan county as the object of study. According to concreation in the project, optimal objective functions were established.The outcomes were analyzed and demonstrated the effectiveness of the designed method.This study could provide guidance for the reliablity optimization design of centralized heat-supply system with muli-sources.Finally,the paper gave an analysis and discussion of the adjustment calculation methods in heat supply loop network system with muli-heat sources.Because of ring network architecture and the effect of heat source location,the number and location of intersection were different.Hydraulic balance in the system,the ring difference in system should be zere.This paper studied the check calculation for a practical project in Jinan.The results of analysis by the method gave a reasonable engineering assessment of the results.