Biomedical Engineering Reference
In-Depth Information
ambient temperature and the relative humidity,
which increases to almost saturation during hot-
humid (rainy) season. The important consider-
ation in all the systems should be water economy
and recycling. Sprinkler and fan cooling systems
generate a large volume of wastewater which must
be processed or recycled. The fan/sprinkler system
uses about tenfold more water than the fan/mist
system. Mechanical cooling, or air conditioning, is
generally considered expensive and uneconomic
in animal housing. During hot-humid season, use
of evaporative cooling pads reduces air tempera-
ture of the barn without any effect on milk yield.
Therefore, improved systems capable of either
cooling the animal directly or cooling the sur-
rounding environment are necessary to better con-
trol the animal's body temperature and maintain
production in hot and hot-humid climates. With
cooling devices, the temperature in the animal
sheds may be kept low to cool animal, and THI
can be kept around 72. The high-producing cows
may be kept under low temperature, and an invest-
ment in mechanical cooling may be feasible.
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http://www.chps.
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