Research on low-temperature heating technology of cogeneration based on absorption heat exchange
In order to reduce the impact of winter heating on the power output of cogeneration units,proposes a low-temperature heating technology based on absorption heat exchange for cogeneration.With the help of absorption heat exchange technology,the dual reduction of primary network supply water temperature and return water temperature is achieved,and the proportion of exhaust steam heating during the heating season is increased,thereby improving the energy utilization efficiency and economic benefits of cogeneration units.Taking a thermal power plant in northwest China as an example,an application case analysis was conducted.The analysis results showed that after the project renovation,the reduced power generation due to heating decreased from 213 million kWh before the renovation to 97 million kWh.Without increasing coal consumption,a single heating season can generate an additional 116 million kWh of electricity;The annual increase in revenue is 47.66 million yuan,and the static investment payback period of the project is 3.7 years.The economic feasibility of the renovation is very considerable.The theoretical analysis and application case analysis results show that the low-temperature heating technology based on absorption heat exchange for cogeneration proposed in this article can significantly improve the proportion of exhaust steam heating and energy utilization efficiency of cogeneration units,promote energy conservation and emission reduction in China's central heating industry.
combined heat and power generationlow-temperature heatingabsorption heat exchangethe proportion of exhaust steam heating
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