Analyses on Heat-Power Decoupling Potential and Energy Consumption Characteristics for CHP Plant Integrated With Heat Pump

doi:10.12096/j.2096-4528.pgt.19073

Power Generation Technology ›› 2019, Vol. 40 ›› Issue (3): 253-257.DOI: 10.12096/j.2096-4528.pgt.19073

• Energy Clean and Efficient Utilization in Coal-fired Power Systems • Previous Articles Next Articles

Analyses on Heat-Power Decoupling Potential and Energy Consumption Characteristics for CHP Plant Integrated With Heat Pump

Zhongqiu LIU¹(),Guozhu ZHANG¹,Yinchen QIU¹,Juntai ZHANG¹,Shan WANG²,Ming LIU²()

¹ Datang(Beijing) Energy Management Co. LTD., Haidian District, Beijing 100097, China
² School of Energy and Power Engineering(Xi'an Jiaotong University), Xi'an 710049, Shaanxi Province, China

Received:2019-05-06 Published:2019-06-30 Online:2019-07-02
Supported by:
National Key Research and Development Program(2018YFB0604405);Shaanxi Province Innovation Capability Support Plan(2018TD-014)

Abstract

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 α_COP1 and heat load rate, and decreases as power load rate increases. When the α_COP1 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%.

Key words: heat and power cogeneration, heat pump, heat-power decoupling, power load rate, heat load rate

Zhongqiu LIU,Guozhu ZHANG,Yinchen QIU,Juntai ZHANG,Shan WANG,Ming LIU. Analyses on Heat-Power Decoupling Potential and Energy Consumption Characteristics for CHP Plant Integrated With Heat Pump[J]. Power Generation Technology, 2019, 40(3): 253-257.

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Analyses on Heat-Power Decoupling Potential and Energy Consumption Characteristics for CHP Plant Integrated With Heat Pump

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