Research On The Optimization Of Dynamic Distributed Central Heating Planning For A County In Tibet

Scientific planning of urban district heating not only improves people’s quality of life,but also accelerates the development of the city.Traditional centralized heating systems can no longer meet the requirements of energy conservation and economy under the current trend of “energy conservation and emission reduction”.Therefore,instead of the dynamic distributed heating system came into being.In view of the many drawbacks of traditional centralized heating,this paper takes the central heating system of a county seat in Tibet as the research object.According to the overall plan of the county,it divides 8 heating zones;According to the local climatic conditions and building type,the heating area and the heating load are determined.The total heating area is 42.72 million square meters and the total heat load is 26.85 MW.According to the local natural conditions,the energy form of biomass and energy,the heat source form of the regional boiler room are determined.And also determine heating and heating parameters;the direction of pipe network;the laying of pipe network.This paper focuses on the optimization of the heating system in the south of the city,and introduces the traditional system of central heating and distributed heating,and compares the advantages and disadvantages of the two systems.This paper suitably presents the design and adjustment method of power distributed system for this project,and discusses the regular of the changeable zero pressure difference position and the feasibility of frequency pump replacing the regulating valve.According to zero pressure difference position,this engineering designs seven different power distributed heating system in addition to the traditional heating solutions,The computation is carried ondistribution energy consumption of all distributed system,and contrast with traditional heating schemes,we can find the difference position of zero pressure make different distribution power consumption;The largest energy-saving solutions can save 30% when the zero pressure difference control point in the heat source.Therefore,The largest energy-saving system is determined.The economical simulation of traditional heating system and seven different distributed systems are carried out.The relative power consumption calculation formula of the distributed variable frequency pump and the annual calculation cost of the objective function of the system are given..Through the computation,it is concluded that difference position of zero pressure makes different scale-economy,The largest economical solutions can save 29.86% when the zero pressure difference control point in the heat source.Therefore,the most economical solution of the system is clarified and the optimal solution is obtained through analysis and calculation.