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热电厂利用电厂的抽汽、排汽、经热交换器並通过城市供热管网向城市供应大于100℃的高温水。把高温水用于工厂、旅馆、浴室、居民区以实现全市集中供热,可大大减少城市的飞尘和二氧化硫排放量,减少城市空气污染及酸雨的形成。此法与热电厂用蒸汽供热相比更能节约原煤。水在高温状态下作热供应时其性能要比低温状态下好。水的比热随温度升高而增加,热容量随温度升高而增加。温度230℃的水与60℃的水相比,其热容量增加12％。水的热容量与蒸汽相比要大几十倍。由于高温水的蓄热量大,设计供热管路时可减小管径,节
The thermal power plant uses the power plant’s extraction, exhaust, and heat exchangers to supply the city with high-temperature water greater than 100°C through the urban heating pipe network. The use of high-temperature water for factories, hotels, bathrooms, and residential areas in order to achieve centralized heating in the city can greatly reduce urban emissions of dust and sulfur dioxide and reduce the formation of urban air pollution and acid rain. This method saves more raw coal than steam heating in thermal power plants. When water is heated at high temperatures, its performance is better than at low temperatures. The specific heat of water increases as the temperature increases, and the heat capacity increases as the temperature increases. The water at a temperature of 230°C has a 12% increase in heat capacity compared to 60°C. The heat capacity of water is several ten times larger than that of steam. Due to the high heat storage temperature of the high temperature water, the pipe diameter can be reduced when designing the heating pipeline.