A Study On Distributed Energy Systems Based On Central Heating Pipe Network

The central heating capacity of the heat source is designed by the heat load of the end user, which leads to that the heat source is running in a non-full-load condition most of the time and can’t meet the design thermal efficiency, at present in China. Another problem is that "large flow rate and small temperature difference" exists in the heating network. In addition, the regulation of the heating network is at a low level. They all increase the power consumption of the circulating water pump. In this paper, distributed peak shaving technology was combined with natural gas distributed CCHP technology. The gas turbines and flue gas absorption heat pump system were set in a Large temperature difference thermal stationlarge based on the absorption heat exchanger as peak heat. The flue gas heat was used for heating hot users. It assumed the peak load of hot users.This paper is based on BIN method and integral method to establish the mathematical model of heating system energy consumption. Get the Simulation calculation of gas turbine combined cooling heat and power system equipment as peak shaving running for the whole year energy consumption of heat source heating system by programming simulation and carries on the optimization to get the optimal load ratio. In addition, this paper also respectively calculate the operation energy consumption of secondary load of gas boiler system and the common central heating system and compare the operation cost, exergy efficiency and pollutant emission situation of the three systems. It is concluded that the operation cost of gas turbine combined cooling heat and power equipment as a secondary network load heat source heating system is minimum, the exergy efficiency is the highest and the environmental benefits is the best.In this paper, The basic model of central heating pipe network hydraulic condition based on the network graph theory, Kirchhoff s law and the characteristics of line equation is established and solving with the basic circuit analysis method. According to the mathematical model and solving method the calculation of heat supply network flow distribution program. Analysis the influence on the heat supply network hydraulic conditions of the heat exchange station renovation with the process simulation and adjust the heat supply network with a simulation adjustment method to make it reach the ideal state.