Air at 80°F DB and 50% RH is cooled and dehumidified to 50°F and 100% RH. What is the rate of latent heat removed from 1,000 CFM of air? b) If 500 CFM of outside air at 96°F DB and 76°F WB is mixed with 1,500 CFM of return air at 80°F DB and 50% RH, what is the specific humidity of the mixed air stream? c) A room has a sensible cooling load of 32,000 Btu/hr. The room latent load is 12,000 Btu/hr. What sensible heat factor results from these loads?
PLEASE SOLVE ANY TWO QUESTIONS.
a) Air at 80°F DB and 50% RH is cooled and dehumidified to 50°F and 100% RH. What is the rate of latent heat removed from 1,000 CFM of air?
b) If 500 CFM of outside air at 96°F DB and 76°F WB is mixed with 1,500 CFM of return air at 80°F DB and 50% RH, what is the specific humidity of the mixed air stream?
c) A room has a sensible cooling load of 32,000 Btu/hr. The room latent load is 12,000 Btu/hr. What sensible heat factor results from these loads?
d) Air at 40°F DB enters a furnace with a heating capacity of 50,000 Btu/hr. If the temperature of the air is increased to 90°F, what is the air flow rate supplied to the furnace?
e) Find the enthalpy of air whose dry bulb temperature is 76°F with a humidity ratio of 60 grains/lb
f) Air at 30°F DB and 80% RH is heated to 75°F DB by passing it over a heating coil (i.e. sensible heating only) What is the wet-bulb temperature of the heated air?
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