Atmospheric air at a pressure of 1 atm and dry bulb temperature of 28 C has a wet-bulb temperature of 20 C.

Using the psychrometric chart, determine:

(a) the relative humidity,

(b) the humidity ratio,

(c) the enthalpy,

(d) the dew-point temperature, and

(e) the water vapor pressure.

a) , b) , c) , d) , e)

Explanation:

a) The relative humidity is given by the intersection of the dry bulb and wet bulb temperatures:

b) The humidity ratio is:

c) The enthalpy is:

d) The dew-point temperature is:

e) The water vapor pressure is the product of the relative humidity and the saturation pressure evaluated at dry bulb temperature:

fanswer:

explanation:

f