Simulation Analysis of Flue Gas Waste Heat Utilization Retrofit Based on ORC System  

作　　者：Liqing Yan Jiang Liu Guangwei Ying Ning Zhang 

机构地区：[1]College of Energy and Mechanical Engineering,Shanghai University of Electric Power,Shanghai,200090,China [2]Shanghai Engineering Research Center of Energy-Saving in Heat Exchange Systems,Shanghai,200090,China [3]China Huadian Corporation Ltd.Shang Hai Company,Shanghai,200126,China [4]Zaozhuang Vocational College,Chemical and Pharmaceutical Institute,Zaozhuang,277000,China

出　　处：《Energy Engineering》2023年第8期1919-1938,共20页能源工程（英文）

基　　金：supported by research funds from Shanghai’s 2020 Annual Science and Technology Innovation Action Plan:Social development and Science&Technology Project(No.20dz1205302).

摘　　要：Recovery of waste heat from boiler flue gas is an effective way to improve energy utilization efficiency.Taking a heating station heating project as an example,the existing heating system of this heating station was analyzed for its underutilized flue gas waste heat and low energy utilization rate.Rankine cycle is an effective waste heat recovery method,and a steam boiler organic Rankine cycle(ORC)cogeneration waste heat utilization method is proposed.The system model simulation is constructed and verified.First,a thermodynamic model was constructed in MATLAB and five suitable work gases were selected to analyze the effects of evaporation temperature and condensation temperature on the network and thermal efficiency of the waste heat cycle power system.Secondly,the ORC model is invoked in TRNSYS to construct the improved cogeneration system,and the rationality of the remaining heat utilization methods is determined by calculating and analyzing the thermal performance,economy,and environmental protection of the improved system.The simulation results show that the system can generate about 552,000 kWh of electricity per year,and improving the energy utilization rate from 0.72 to 0.78.

关 键 词：COGENERATION waste heat recovery organic Rankine cycle simulation model 

分 类 号：TK11[动力工程及工程热物理—热能工程]