MODULE III
Air-conditioning and Cooling technology Page 60

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c) with extraneous heat Q






3.2.4 Dehumidification

Influencing the humidity of the room air by changing the proportion of the outside air


In special plants with a high amount of extraneous humidity, for example, in indoor swimming pools, the humidity of the room can be reduced in winter and during the transition period by increasing the proportion of the outside air.

On / off method of "dehumidification"

control In the case of simple plants (small indoor swimming pools), ventilation is carried out with the help of cabinet coolers. Apart from a fan and a heater battery, these units also incorporate outside and return air dampers (see Fig.49a). The heater battery is controlled with the help of the room temperature detector 4, while the supply air temperature low limiter 3 prevents the supply air temperature from falling below the permissible values.

Fig. 49 Simple swimming pool control




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