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换热器亦称热交换器(Heat exchanger)是合理利用与节约现有能源;开发新能源的关键设备。为了节能降耗,利用换热器进行余热回收来节煤、节油、节电、节水,节汽是目前最为有效的节能方法。因此,对换热器节能的合理评价有着十分重要的意义。换热器是一种普通的热力设备,但计算方法及特性却与一般热力设备不同,特别是有关换热器传热温差,效率,性能评价等经常引起岐议,必须引起人们重视。一、换热器的基本特性1.传热特性在换热器中,高温流体的热量通过壁面传
Heat exchangers, also known as heat exchangers, are key equipment for the rational use and conservation of existing energy; the development of new energy sources. In order to save energy and reduce consumption, heat exchangers are used for waste heat recovery to save coal, save fuel, save electricity, and save water. Gas saving is currently the most effective energy-saving method. Therefore, it is of great significance for the reasonable evaluation of heat exchanger energy conservation. The heat exchanger is an ordinary thermal equipment, but its calculation method and characteristics are different from those of general thermal equipment. Especially the heat transfer temperature difference, efficiency and performance evaluation of the heat exchanger often cause concern and must be paid attention to. First, the basic characteristics of the heat exchanger 1. Heat transfer characteristics in the heat exchanger, the heat of high-temperature fluid through the wall