1 You own a mechanically ventilated swine facility The dry b

1) You own a mechanically ventilated swine facility. The dry bulb temperature inside the facility is 50 degrees F and outside is only 30 degrees F. Inside you have a relative humidity of 70% and outside the relative humidity is 20%. To keep the humidity from getting any higher you need to remove 12 gallons of water per hour from the facility with the ventilation air. At what rate (cfm) must the fans pull inside air out of the building?

Fan Rate = XXXX cfm

2) A producer has a barn for sheep and lambs. The producer wants to use evaporative cooling to cool the barn. If the outside air has a dry bulb temperature of 90 degrees F and a relative humidity of 40%, what is the lowest temperature that the producer can get using the evaporative cooler?

Lowest Temperature = XXXX degrees F

Solution

2) The required lowest temperature can be predicted by using the psychometric chart. So from the chart, the temperature corresponding to the given relative humidity with respect to dry bulb temperature is 68°F.

The lowest temperature is 68°F.