| Our country is a great country of energy consumption, waste heat recovery and utilization is an important research direction of our energy reduction. The ORC waste heat recovery power generation research will greatly promote the development and utilization of waste heat and reduce the use of fossil fuels as well as greenhouse gas emissions. The new heat recovery technology will greatly promote the sustainable development of our economy and bring about huge economic and social benefits. In this paper,regarding the smoke of 400? which is discharged from furnace of float glass as analysis object and the thermal efficiency and levelized cost of energy calculation of the system as objective function,we studied the ORC performance of different working fluid and analyzed the influence of condensing temperature and superheat on ORC thermal efficiency and levelized cost of energy calculation.It proposes recommendations for engineering applications.The main research content of this paper is as follows:(1)Under known conditions of heat,according to the thermal efficiency and LEC calculation model,it analysises of 7 kinds of pure refrigerants thermal efficiency and LEC variation in subcritical and supercritical systems ORC system. Comparison of seven kinds of refrigerants, benzene and toluene has a high thermal efficiency, with the system small levelized cost of energy calculation.(2)According to the working fluid circulating maximum thermal efficiency and LEC combining with the working fluid safety and environmental protection, working fluid is filtered.(3)Under subcritical conditions, increasing superheat, the thermal efficiency of the system is essentially the same. Increasing the degree of superheat to improve cycle capacity and LEC of power generation is not desirable. For condensing temperature changing on supercritical and subcritical systems, the impact of maximum thermal efficiency and LEC is small.(4)Under the same heat conditions, water cycle thermal efficiency compared with organic working fluids advantage is smaller, and the LEC compared to an organic working fluid is larger.(5)According to the research, it is put forward that under the given conditions of heatsource, comprehensive analysis of circulating thermodynamic properties, generation cost and environmental performance, with R141 b refrigerant supercritical ORC technology can use waste heat of float glass furnace power recovery.The thermal efficiency is 19.02%,and LEC is 0.04339$/(kW·h). |
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