Energy-saving optimization analysis of cogeneration system in new coal-fired power plant
FANG Yaxiong
CHEN Hui
WU Ying
Abstract：In view of the exergic loss of exergic heat exchange of conventional heating units and the turbine departure from the designed working condition caused by a large amount of steam extraction,a new cogeneration scheme for coal-fired power plants is proposed by combining absorption heat pump technology,absorption heat exchange technology and high back pressure technology.Based on the actual operating parameters of a 350 MW cogeneration unit,thermodynamic analysis and calculation of each scheme are carried out.The results show that compared with the conventional cogeneration scheme,the exergic loss of exergic decreased during heat transfer,part of the waste heat released by the condenser was recovered,and more power generation could be obtained under the same heat supply.Under the premise of constant heat supply,the net power generation increased by 14.89 MW and the net power generation efficiency increased by 1.81％.
Keywords：coal-fired power plantcogenerationenergy-saving optimizationwaste heat utilizationeconomic analysis
Publication Date：2025-01-31
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 14-17 )