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COOLSOW
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Why Pigs Must be Cooled
When shed temperatures exceed 22-24ºC pigs become
hot and food intake is reduced. As a consequence growth rate
slumps by at least 10%. Cooling growing pigs provides relief
from the heat in two ways. The pig is cooled and the evaporation
of water from the concrete floors also has a cooling effect
on the shed. Benefits
Spray cooled pigs grow as much as 33% faster and
feed efficiency improves by around 11%. Spray cooled pigs
continue to eat even during the hottest part of the day.
How COOLGRO works
The system consists of an electronic controller,
a temperature probe and one solenoid valve. You set the
controller to turn the spray cooling system on at your pre-selected
shed temperature between 22 & 32ºC. COOLGRO then
operates a variable spray cycle – either 2, 4 or 6
minutes every half hour the shed temperature exceeds the
temperature you selected. One controller can run up to two
solenoid valves. For example, if your water pressure is
restricted or your sheds are very long, you can run two
separate water lines from one COOLGRO controller. When the
temperature falls below your setting, the COOLGRO turns
the system off.
Some Tips for Spray Cooling Systems
Install the sprays (droplets – not a fine
mist) so that water sprays onto the pig’s back. Put
them 1.8m to 2.0m above the floor over the slatted area.
Spray cooling requires only 300ml/hour per pig. In hotter
parts of Asia there are in excess of 1500 hours per year
when temperatures exceed 22ºC. About 500 litres of
water per pig are required per summer.
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