Abstract
In order to improve the energy efficiency of integrated energy system (IES), the organic Rankine cycle (ORC) power generation technology with high heat conversion efficiency is used to recover the low-grade waste heat from the combined cooling and power system of micro gas turbine (MGT-CCP) in IES. The energy efficiency analysis is based on the results of day-ahead economic scheduling. Firstly, the IES scheduling model is established, and 0–1 mixed integer nonlinear programming is used to describe the day-ahead economic scheduling problem of the system. Secondly, three optimization solvers, OPTI, Cplex and Gurobi, were used to solve the problem under an actual case respectively, and the performance and effect of these three solvers were compared. Then the load distribution with and without the utilization of low-temperature waste heat is optimized and analyzed in comparison. According to the optimization results, the opening of the ORC unit is equivalent to increasing the power generation of the MGT-CCP system by 7.61%, increasing the power generation efficiency of the system by about 3.30%, and reducing the carbon dioxide emission by about 4.49%, which proves the economic feasibility and carbon emission reduction benefit of MGT-CCP combined with ORC.
Published Version
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