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我国北方城市采暖大多依靠燃煤,采暖能耗在总能耗中占有相当比重。利用90℃以下的低温地热水和工业废热等供暖,除了有经济利益外,还有资源合理利用和保护环境免受污染两大社会效益。煤燃烧产生的高温烟气热能品位高,作功能力比60℃热水大5倍以上。煤和60℃热水两种能源的质地不同,煤的许多重要用途是60℃热水所没有的。烧煤取暖维持18℃室温,使能转变为功的有效能遭到严重损失,是不合理的。为了与传统的95～70℃热水采暖系统相区别,用低位热能供暖的系统可简称低温供暖。与锅炉采暖系统不同,低温采暖系统的
Most of the northern cities in China rely on coal for heating, and heating energy consumption occupies a considerable proportion of the total energy consumption. The use of low-temperature geothermal water and industrial waste heat below 90 °C, in addition to economic benefits, there are two major social benefits of rational use of resources and protection of the environment from pollution. The high-temperature flue gas heat produced by coal combustion is of high grade, and its functional capacity is more than 5 times higher than that of 60°C hot water. Coal and 60°C hot water have different textures. Many important uses of coal are not available at 60°C hot water. It is unreasonable that coal-fired heating is maintained at room temperature of 18°C, and that the energy available for conversion to work is severely lost. In order to distinguish it from the conventional 95-70°C hot water heating system, the system using low heat energy can be referred to as low temperature heating. Different from the boiler heating system, the low temperature heating system