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一、概述许多换热设备用于寒冷地区,如大门暖风幕、暖风机、散热器及空调器中的加热器等等,为了防止管内液体工质冻结造成换热设备的损坏,人们常采用的方法是在工质中添加防冻液,而以乙二醇水溶液为工质来防冻是目前较为先进的方法之一。我厂在为国家某重点工程配套暖通空调设备中,其中的大门暖风幕、空气处理室的加热器及暖风机等换热设备就采用了乙二醇水溶液为传热工质。但是,在进行传热和阻力计算时缺乏有关这一工质的计算资料,也没有相应的经验公式可资应用。因此,乙二醇水溶液工质
First, an overview of many of the heat exchange equipment used in cold areas, such as the door warm air curtain, heaters, radiators and air conditioners in the heater, etc., in order to prevent freezing of liquid refrigerant tube heat exchanger damage, often used Method is to add antifreeze in the working fluid, and ethylene glycol aqueous solution as the working fluid to antifreeze is currently one of the more advanced methods. I plant in the country for a key project supporting HVAC equipment, one of the door warm air curtain, air treatment room heater and heater and other heat exchange equipment on the use of ethylene glycol solution for the heat transfer medium. However, there is a lack of data on the calculation of heat transfer and resistance, and no empirical formula is available. Therefore, ethylene glycol aqueous working fluid