热电联产机组集成热泵实现热电解耦的潜力与能耗特性分析
摘要：在热电联产机组中集成机械式热泵可以实现热电解耦，并影响机组的能耗特性。以某350MW热电联产机组为例，建立了供热机组变工况计算模型以及机械式热泵供热计算模型，比较了热电联产机组采用抽汽供热和压缩式热泵供热时最低电负荷率及煤耗量的差别，同时研究了热泵性能系数、电负荷率、热负荷率对机组能耗特性的影响规律。结果表明：在基准工况下，压缩式热泵供热较热电联产节能，且其机组的电负荷可调节范围更大。压缩式热泵供热相比抽汽供热减少的煤耗量随着热泵实际性能系数αCOP1、热负荷率增大而增大，随着电负荷率增大而减少，αCOP1为6.119，热负荷率为2.5，电负荷率为0.8时，节煤率为2.60%。
Abstract:The integration of heat pump can realize heat-power decoupling, and would influence the energy consumption characteristics of combined heat and power cogeneration plants (CHP). Therefore, a 350MW CHP unit was taken as a reference case, and the off-design calculation models of CHP unit and the heating calculation models of heat pump were established. The minimum power load rate and the coal consumption rate of the CHP plants with steam extraction and heat pump to supply heat were compared. The influences of the heat pump performance coefficient, the power load rate and the heat load rate on energy consumption characteristics of CHP plants were also studied. Results show that the compression heat pump can save energy on benchmark condition and its power load regulation range is also greater. The coal saving rate increases with the increase of αCOP1 and heat load rate, and decreases as power load rate increases. When the αCOP1 is 6.119, the heat load rate is 2.5, and the electric load rate is 0.8, the coal saving rate is 2.60%.
标题：热电联产机组集成热泵实现热电解耦的潜力与能耗特性分析
title:Analyses on Heat-Power Decoupling Potential and Energy Consumption Characteristics for CHP Plant Integrated With Heat Pump
作者：刘忠秋,张国柱,邱寅晨,张钧泰,王珊,刘明
authors:Zhongqiu LIU,Guozhu ZHANG,Yinchen QIU,Juntai ZHANG,Shan WANG,Ming LIU
关键词：热电联产,热泵,热电解耦,电负荷率,热负荷率,
keywords:heat and power cogeneration,heat pump,heat-power decoupling,power load rate,heat load rate,
发表日期：2019-06-30
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