Question

8) If outdoor air at 95F dry bulb and 78F web bulb is cooled to 75F dry bulb without any dehumidification, what will the relative humidity be?

Answer 1

Given that If outdoor air at 95F dry bulb and 78F web bulb is cooled to 75F dry bulb without any dehumidication. Relative humidity measured by subtracting the temperature on the wet-bulb thermometer from the temperature on the dry-bulb thermometer and using a Relative humidity chart. here dry bulb temperature is 95F and difference of dry bulb wet bulb is = (78 - 75) = 3 Now go to chart we see the lowest row of value 95 then 3 in third column, which give relative humidity is 89%