| For the existing state of china's high energy consumption and poor stability heating system, this paper introduces the domestic and foreign existing central heating system, and summarizes the advantages and disadvantages of various systems by comparative analysis. And a new central heating system,namely single-pipe multi-heat sources with multi-pumps of direct connected system is proposed on this basis.In this paper, the cost model of system include Heat & Power plant, coal-burning boiler and oil-burning,gas-burning boiler is established and calculated by excel.The best matching plan is got.In this paper, the thermodynamic and hydraulic formula of single and double loop system is proposed on the basis of analysis, and the calculation model of single-pipe double-loop double-heat sources of direct connected system is established and calculated by excel. The economic and technical data of temperateure, flow, pressure is got.This paper takes a new heating system as an example, establishs and calculates the model by traditional and new design method. The economic and technical data of temperateure, flow, pressure and investment is got. This paper proves the superiority and the practical feasibility of the new system, and it is valuable for the design and application of single-pipe heating system. |
