A large-scale biotechnology company needs to heat and humidify the air being introduced into a growth chamber. Outside air with a dry bulb temperature of 10° C and 30% relative humidity is brought into their facility but must be heated to 37 °C and humidified to 85% relative humidity. Calculate
a. The relative humidity of the air when it is heated to 37°C, but BEFORE it is humidified.
b. The heat required to raise the temperature of the incoming air before it is humidified on a per kg dry air basis.
c. The amount of water that must be added to the heated incoming air to achieve the desired relative humidity.
d. The amount of moisture lost by the heated and humidified air if it was cooled to 21°C and used as supply air for another controlled environment room.
e. Would it be comfortable for a person to work in the 21°C room described in Part d?