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目前在中小面积恒温室的空调设计中,一般均采用定型的恒温恒湿空调机组(以下简称机组)。国产机组的设计工况焓降均小于5千卡/公斤。而在选择机组时常常会碰到需要焓降大(大干5千卡/公斤)而送风量小于机组风量这种情况,例如欲保证室内规定的新风量,则设计要求的焓降超过了与机组在实际运行风量(即室内送风量)下的“允许焓降”;有些被调房间不允许使用室内回风,须用直流系统。这时还能否采用机组?此外,当最后选定的机组其冷量大于设计计算容量时有没有办法使机组能力发挥出来,在不另增投资的前提下,尽可能多送新
At present, in the air conditioning design of small and medium-sized constant-temperature rooms, stereotyped constant-temperature, constant-humidity air-conditioning units (hereinafter referred to as units) are generally used. The design conditions of domestic units are all less than 5 kcal/kg. In the selection of the unit, it is often encountered that there is a need to reduce the load (5 kcal/kg) and the air supply volume is smaller than the air flow rate of the unit. For example, to ensure that the indoor air volume is new, the design requirements exceed the With the unit in the actual operating air flow (ie, indoor air supply) under the “allowed drop”; some adjusted room is not allowed to use indoor return air, must use the DC system. Is it still possible to use the unit at this time? In addition, when the capacity of the last-selected unit is greater than the design calculation capacity, there is no way to make the unit’s capabilities come into play. If there is no additional investment, send as many new ones as possible.