关键词: 火力发电, 热电联产机组, 蒸汽供热系统, 蒸汽压缩机, 蒸汽再压缩, 蒸汽管网, 热损失

Abstract: [Objectives]　To address the issues of significant pipeline network losses in the steam heating system and the uneven steam parameters of heat users, a steam heating system based on recompression is proposed to reduce pipeline network losses and improve operational benefits.[Methods]　By establishing a coupled simulation model of the steam heating system and the steam compressor, a comprehensive quantitative analysis is conducted on the thermal and economic performance of the system. The influence of key factors such as the degree of pressure reduction and temperature drop on the system performance is also explored.[Results]　Compared with the conventional steam heating system, the maximum reduction in pipeline heat loss of the recompressed steam heating system is 10.59%, with an average reduction of 9.62%. The heat loss power of the steam pipeline network decreases by 110.22 kW. The return period of the new equipment for this system is 3.65 years. Under the condition of the 25-year service life of the units, the net present value of the system can reach 7.533 million yuan.[Conclusions]　The system utilizes a steam compressor to perform steam recompression for local heat users. In doing so, it not only improves the steam parameters of heat users, but also effectively reduces the heating parameters of the main pipeline and the heat loss in the pipeline network, thereby enhancing the economic performance of the system. The proposed system provides a new approach for improving the comprehensive performance of the steam heating system.

Key words: ">thermal power generation, combined heat and power units, steam heating system, steam compressor, steam recompression, steam pipeline network, heat loss