How to Choose Flower Greenhouse Fans and Wet Curtain
Let’s have a look at the working theory of greenhouse fans. First, greenhouse fan absorb the hot air outside and lower down the air temperature by the wet curtain. Generally, the wet curtain and the pumps and water tanks are installed at one side of the wall while greenhouse fans are centrally installed at the other side. The wet curtain should keep its moisture in order to make sure the completion of Evaporative cooling process. You can choose the suit greenhouse fans according the greenhouse size.
Evaporative cooling effect have tight connection with the air dryness, that is to say it closely related to the wet bulb temperature and dry bulb temperature of air. Furthermore, the wet bulb temperature and dry bulb temperature of air not only vary because of geographical and seasonal effects, but also change in a day. Although, the Wet and dry bulb temperature variations may be up to 14 ℃, but the magnitude of wet bulb temperature change is only about 1/3 of the dry bulb temperature. Therefore, even in humid areas noon, evaporation system is still capable of cooling, which is also needed for greenhouse production.
Usually in greenhouse flower production, the thickness of is often used in a fibrous wet curtain 10 cm thick or 15 cm thick of wet curtain should be better about 10 or 15 centimeter.
In addition to location and climate, you should also take greenhouse wet curtain and greenhouse fan distance and flower crops’ sensitivity to temperature into consideration. The father greenhouse wet curtain and fan distance is, the thicker wet curtain you should use(you’d better use 15 centimeter thickness).
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