Full Operating Conditions Optimization of Cogeneration Heating System Based on Waste Heat Utilization of Exhausted Steam of Large Turbine Units

被引：0
|
作者：
Li Y. [1 ]
Mi P. [1 ]
Li W. [1 ]
Zhang S. [1 ]
机构：
[1] College of Civil Engineering & Mechanics, Yanshan University, Qinhuangdao, 066004, Hebei Province
来源：
| 2018年 / Chinese Society for Electrical Engineering卷 / 38期
关键词：
Co-generation; Energy efficiency; Full operating conditions optimization; Waste heat utilization of exhausted steam;
D O I：
10.13334/j.0258-8013.pcsee.172141
中图分类号：
学科分类号：
摘要：
Utilizing the waste heat of exhausted steam in power plant as a new type of heat source is a key direction to achieve both energy-saving and clean urban heating. In order to recycle all the exhausted steam waste heat of multiple units at the same time, the authors’ research group proposed a new cascade heating system with multi-heat source and applied it in several power plants in China. This paper focused on the operation strategy formulating of the new system, the main study contents include: Taking two sets of 300MW direct air cooling turbine units as the example, established the calculation model of system heating characteristics and introduced the “equivalent electricity of heating” as the evaluation method of comprehensive energy efficiency of the new co-generation heating system. Then considering the change regulation of parameters of heat network and composition of heating output, put forward the optimal operation method of backpressure of units to further explore the energy saving potential of the system. The conclusions indicate that the comprehensive equivalent electric power of system heating and the total financial cost per heating output to a certain extent, which means the comprehensive energy efficiency and economy of system can be improved. Results above can be used to guide the optimized operation of exhaust steam waste heat utilization system of large-scale turbine units. © 2018 Chin. Soc. for Elec. Eng.
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页码：4815 / 4822
页数：7
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