| With the development of cogeneration central heating,efficient recovery of exhaust steam waste heat has become an important means to promote clean heating in north China.To reduce the cost of heating,This paper presents two methods for cogeneration central heating system based on exhaust steam waste heat utilization,and research the key parameters of the system and the full process operation optimization method.Combining the absorption heat transfer process in the heat network and the cascade heating flow of power plant based on the absorption heat pump,and construct the first type of cogeneration central heating system.Combining the transfer of combined heat and electricity and cascade heating system of power plant based on the absorption heat transformer,and construct the second type of cogeneration central heating system.Then establish the calculation model of variable operating conditions based on the two systems.Focus on the second type of system,this paper research the influence of heat network parameters on the performance of the absorption heat transformer.This paper establish the thermal network characteristic model,and research the operating characteristics of the system under full working condition and the heating structure of various heat sources.This paper introduces scientific evaluation index of system energy efficiency,and analyze the influence of thermal network parameters on system energy efficiency and economy.Base on the research,optimizing the operation scheme of the planning system under full working conditions and compare the two kinds of systems in this paper.Taking the heating system of a thermal power plant in Shanxi Province as an engineering case,and use the theoretical results of this paper to guide the system integration design and operation optimization.Engineering analysis results can prove the application value of the system by comparing the energy efficiency and economy of the system. |
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