The purpose of the electric heating of the constant temperature and humidity air conditioner is to ensure the proper air supply temperature after the indoor air is dehumidified, and to electrically heat the air supply temperature. The following detailed analysis:
One. Why do we need to electrically supply the supply air temperature?
1. The temperature of the air supply dry bulb of constant temperature and humidity air conditioner is generally 18 ℃, because some production links require higher humidity requirements, such as pharmaceutical factories, electronic factories, etc., the indoor dry bulb temperature is 23 ~ 26 ℃, and the relative humidity is 50 ~ 70 %, If the air is directly reduced to 18 ℃, the air supply cannot guarantee the relative humidity in the room. Therefore, it is often necessary to reduce the return air to a lower dry bulb temperature, such as 12 ℃. However, if the air is directly supplied, the indoor temperature is biased. Low, therefore, it is often necessary to heat the air at 12 ℃ to 18 ℃ before sending it to the room.
2. The following figure is a typical working condition with constant temperature and humidity. Point A is the temperature of the inlet air of the combined air conditioner . The inlet air is the mixed air of the return air and outdoor fresh air. The outdoor fresh air is approved according to 20%. The dry bulb temperature of point A is 26.4 ° C and the relative humidity is 67.9%; point B is The operating point after the constant-temperature and constant-humidity air-conditioning meter cooler has a dry bulb temperature of 12 ° C and a relative humidity of 95%; point C is the operating point after a reheater, the dry bulb temperature is 18 ° C and the relative humidity is 64.6 %.
Figure 1 The purpose of electric heating of constant temperature and humidity air conditioner
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