Determine Sensible Heat Factor (SHF) for this process.

Question

Illustrate the following processes on psychrometric chart with initial state of moist air as dry bulb temperature equal to 20⁰C and relative humidity of 50%.

1. Cooling and humidification.
2. Heating and humidification
3. Humidification at constant dry bulb temperature. Mention one application each for above humidification process.

If the moist air leaves the system for the case (iii) above, at 90% relative humidity, determines per unit mass of dry air:

1. increase in humidity ratio, DW
2. increase in enthalpy, Dh
3. increase in dry bulb temperature, Dt

       iv Determine Sensible Heat Factor (SHF) for this process.