Comparison on CHP Thermo-electric Decoupling Technologies with Heat Pump and Low Pressure Renovation

3rd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Zhang, Li^1 ; Zhijun, E.^2 ; Hu, Qingbo^1 ; Guan, Sensen^1 ; Du, Yan^3 ; Fang, Jiuwen^4 ; Wang, Kun^1 ; Yang, Bangyu^2 ; Li, Zhenbin^2 ; Zhang, Yu^1

Tianjin Electric Power Science and Research Institute, Tianjin

300384, China^1

State Grid Tianjin Electric Power Company, Tianjin

300384, China^2

Tianjin Guodian Jinneng Co-generation Co. LTD, China^3

Tianjin Guodian Jinneng Binhai Co-generation Co. LTD, China^4

关键词: Absorption heat pumps;    Electricity load;    Heating power;    Low pressures;    Low-pressure cylinder;    Low-pressure turbines;    Renewable Power;    Theoretical analysis model;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/300/4/042083/pdf
DOI  :  10.1088/1755-1315/300/4/042083

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Thermo-electric decoupling is an effective way to improve the adoption capacity of renewable power of power grids. Therefore, theoretical analysis models are established in this study to evaluate the decoupling performance of CHP with absorption heat pump, compression heat pump and low-pressure turbine renovation. Results show that absorption heat pump, compression heat pump and low pressure cylinder can all expand the feasible operation area and reduce the minimum electricity load rate of the reference CHP plant. When the heat load is 250 MW, The minimal electricity load rate of unit decreases by 12.98%, 56.47% and 36.34% with absorption heat pump, compression heat pump and low-pressure turbine renovation, respectively. The maximal heat-to-electricity ratio of unit is also increased by integration with heat pump and low-pressure renovation. Besides, the compression heat pump has the best decoupling performance among these three decoupling technologies under the same max heating power.