There
is a temperature and humidity gradient between the two ends of the greenhouse.
Generally temperatures rise from the wet pad to the fans.
Growers
can largely avoid this issue by using a high pressure
fog system, where nozzles are distributed throughout the greenhouse and
inject small water droplets (5-20 micrometers); the air inside the greenhouse
then evaporates the water.
Most
of the growers recommend a high-pressure fog system as opposed to low-pressure
mist. “Basically, if you useing high-pressure fog system you are injecting fine
droplets of water into the air, usually over the plants.
“The problem with high-pressure fog and
low-pressure mist systems is just trying to figure out how to balance water
injection and ventilation rates” . As a rule of thumb placing nozzles no less
than three feet (0,914 meters) above the top of plants to prevent water from
getting on them.
Whether
growers decide to use high-pressure fog system, evaporative cooling can help
control temperature and humidity in the greenhouse.
Greenhouse Cooling & Humidification with Misting,
Misting systems (or Fog systems) play an important role in the
greenhouse climatic control. Misting systems are also used with enormous
advantages to keep the right temperature and humidity in the environment, under
conditions of forced or natural ventilation. In summertime the quick
evaporation of the fog will cool the greenhouse due to the principle of
evaporative cooling, meanwhile it humidifies the environment in case of low
relative humidity. During the wintertime the system keeps the correct humidity
rate preventing the dehydration of the crops caused by heating systems.
BENEFITS
- Increased general productivity of
the greenhouse
- Speeds up
plants growth
- Keeping
of constant humidity levels
- Lower
water consumption for the irrigation
- Growing
of a reproduction plants stock in the greenhouse
- Suitable
for chemical spreading (fertilizers, insecticides)
- Less
humidity need
- The
correct micro-climate in any season
- Less
shading needed
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