吸收式热泵技术在传统热电联产机组余热、废热等低温热源回收领域中应用十分广泛,但由于核能供热起步较晚,所以对于吸收式热泵的应用较少。从某核电机组供热的角度,结合机组特点与吸收式热泵适用条件,针对目前供热方式存在的问题,提出了耦合吸收式热泵及背压式小汽轮机的核能供热方案。利用EBSILON仿真软件对2种供热方案进行仿真建模,从热泵参数对供热机组的影响、供热方案变工况分析、节能降耗分析对2种供热方案进行分析。通过研究发现,吸收式热泵低温热源进口温度及热网回水温度对热泵性能系数COP值和机组发电量均有较大影响。热网回水温度增大,热泵COP值减小,机组发电量增加；低温热源温度升高,热泵COP值和机组发电量均增大。在设计供热量为500MW时,三种工况下新型供热系统发电热耗比高排抽汽供热系统分别降低了231.05 MW/(kW·h)、236.73 MW/(kW·h)和278.6 MW/(kW·h),占比为2.48%、2.52%和2.93%。

Absorption heat pump technology is widely used in the field of low-temperature heat source recovery such as waste heat and waste heat of traditional cogeneration units, but due to the late start of nuclear energy heat supply, there are fewer applications for absorption heat pumps. from the point of view of heat supply of a nuclear power unit, combining the unit characteristics with the applicable conditions of absorption heat pumps, and in view of the problems existing in the current heat supply method, a nuclear energy heat supply scheme coupled with absorption heat pumps and back-pressure small turbines is proposed. EBSILON simulation software is used to carry out simulation modeling of the two heating schemes, and the two heating schemes are analyzed in terms of the influence of heat pump parameters on the heating unit, the analysis of variable working conditions of the heating scheme, and the analysis of energy saving and consumption reduction. It was found that the low-temperature heat source inlet temperature of absorption heat pump and the return water temperature of heat network have a large influence on the COP value of heat pump performance coefficient and the power generation of the unit. Heat network return water temperature increases, heat pump COP value decreases, unit power generation

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