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空气加热器是普通通風工程、热風暖气工程、空气調节工程和干燥工程中十分重要的一种設备。正确經济地选擇一种空气加热器乃是十分重要的事情。北京的設計院,一股采用ГСТМ型空气加热器,而在尺寸受限制时采用ОГ型,也有几个設計院一律采用КП型(即ПВ型)。但是究竟哪一种經济,尚未有人作过系統地研究。本来,考虑經济的問題是应該从多方面着手的。然而十分遺憾,許多資料我們無法知道,例如一个地区的电費,加热一定空气所需的热量价格,空气加热器的一次投资費(安裝費、出厂价格和交通运輸費等)和折旧費等等,因此我們考虑伪問題就只能少一些。我們現在从下列三个問題进行比較: (1) 每小时散發1千卡热所需要的空气加热金屬重量; (2) 每小时散發1千卡热所需要的空气加热器的
The air heater is a very important device in general ventilation engineering, hot air heating engineering, air conditioning engineering and drying engineering. It is very important to choose an air heater correctly and economically. In Beijing’s design institutes, ГСТМ type air heaters are used, while ОГ type is used when the size is limited, and several design institutes use КП type (ie, ПВ type). But what kind of economy has not been systematically studied? Originally, considering economic issues should start from many aspects. However, it is very regrettable that we cannot know much information, such as electricity charges in a certain area, the price of heat required to heat a certain amount of air, an investment fee for air heaters (installation, ex-factory price, transportation, etc.), depreciation, etc. Etc. Therefore, we can only consider fewer pseudo-issues. We now compare the following three questions: (1) The air heating metal weight required to disperse 1 kcal heat per hour; (2) The air heater required to dispense 1 kcal heat per hour.