Abstract
Water meters were installed on the evaporative cooling system of a long, low-profile, cross-ventilated dairy in the upper Midwest. The evaporative pad along the west side measured 10 by 350 ft. The water usage per unit surface area of the evaporative pad was 0.29 gallons/hour per square foot of evaporative pad surface area. The total daily water usage per stall averaged 13 gallons with a maximum of 22.7 gallons. Results from this study indicate that peak hourly water usage may be as much as 3 times the average values. The evaporative pad efficiency was 65% between noon and 0800 hours and 79% between midnight and 0400 hours.; Dairy Day, 2009, Kansas State University, Manhattan, KS, 2009; Dairy Research, 2009 is known as Dairy Day, 2009
Highlights
Consumptive water use on a dairy for heat abatement increases the daily water requirements during summer
Results from this study indicate that peak hourly water usage may be as much as 3 times the average values
The pad efficiency increased to 79% during the night
Summary
Consumptive water use on a dairy for heat abatement increases the daily water requirements during summer. Water usage depends on weather conditions, the heat abatement system, and operational characteristics. Evaporative cooling systems cool the air around a cow’s body to help minimize heat stress and maintain an animal environment in the thermoneutral zone. Distributors of evaporative pads assume a pad efficiency of 75% regardless of the air properties or air speed. Little information exist describing water demand and water usage of evaporative pads, making it difficult to properly design the water distribution system. The objective of this study was to determine consumptive water usage of evaporative cooling systems on a low-profile, cross-ventilated dairy facility
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