NaanDanJain Dan Fogger Manual page 5

Applications
Cooling
One calorie is the amount of heat necessary to raise the temperature of 1 cm
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by 1º C.The conversion of water from liquid to vapor absorbs heat from the surrounding
air at a rate of 590 calories per 1 gram of evaporated water. This process lowers the air
temperature.
Efficient installation and operation can reduce the temperature in the greenhouse
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between 6º and 9º F, depending on two environmental factors: external temperature and
external humidity.
Efficient cooling with foggers requires an adequate ventilation system that continually
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introduces external dry air into the greenhouse to replace the humid air.
A precipitation rate of .118 inches/hour (3mm/hour) is suitable for cooling.
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The duration of the fogging depends upon the air velocity created by the ventilation
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system.
Air Velocity
0.328 ft/s
1.64 ft/s
3.28 ft/s
Humidification
Ventilation must be shut down in order to increase the humidity
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The duration of fogging should be as short as possible
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The intervals between fogging should be as short as possible (1 second)
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A controller should be installed to manage the cycling in connection with temperature
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and humidity sensors.
Humidity
30-40%
40-50%
50-60%
©2011 Jain Irrigation, Inc.
Dan Fogger/Mister
Interval
10 seconds
10 seconds
10 seconds
Interval
60 seconds
90 seconds
120 seconds
3 of water
Duration
1-2 seconds
3-5 seconds
10 seconds
Duration
1 second
1 second
1 second
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