Question

In: Mechanical Engineering

An air-conditioned zone is at 72°F and 40% relative humidity. The total heating load of the...

An air-conditioned zone is at 72°F and 40% relative humidity. The total heating load of the space is 300,000 Btu/hr, out of which 60,000 Btu/hr is latent heating load. To maintain an appropriate indoor air quality 1000 CFM of outdoor air at 30°F and 80% relative humidity is required. Determine:

a) flow rate of supplied air at 25 °F above the zone temperature

b) total heating unit load

c) amount of water required for the humidifier

Please show diagrams in psychometric chart too!! Thank you.

Solutions

Expert Solution

Please , appreciate my answer by LIKE key . It would be a great favour

samet mamat answered 2 years ago
Next > < Previous

Related Solutions

1222 Air enters a heating section at 100 kPa, 9oC, 45% relative humidity at rate of...
1222 Air enters a heating section at 100 kPa, 9oC, 45% relative humidity at rate of 10m3/min, and it leaves at 22oC. Determine (a) the rate of heat transfer (Q?) in the heating section and (b) the relative humidity (??) at the exit. (c) What-if Scenario: What would the relative humidity at the exit be if the relative humidity of the mixture changed to 75%?
If at 30F the air has 25% relative humidity, what is the relative humidity at 70F...
If at 30F the air has 25% relative humidity, what is the relative humidity at 70F and how much moisture must be added to get it up to 50% relative humidity.
Outside air at 10 degC, 1 bar and 40% relative humidity enters an air conditioner operating...
Outside air at 10 degC, 1 bar and 40% relative humidity enters an air conditioner operating at steady state with a mass flow rate of 1.5kg/s. The air is first heated at essentially constant pressure to 30 degC. Liquid water at 15 degC is then injected, bringing the air to 25 degC, 1bar. Determine (a) the rate of heat transfer to the air passing through the heating section, in kJ/s. (b) the rate of water is injected, in kg/s. (c)...
15 m3 /min of air at 104o F and 60% relative humidity is cooled to 59o...
15 m3 /min of air at 104o F and 60% relative humidity is cooled to 59o F and 100% relative humidity, and then reheated to 68o F. Find the following: a. The flow rate of dry air (BDA) in kg /min. b. The amount of water condensed during cooling stage. c. kW of power needed for cooling the air in the cooling stage. d. kW of power needed for the heating step.
Moist air at 55 oF dry bulb temperature and 40% relative humidity is first heated through...
Moist air at 55 oF dry bulb temperature and 40% relative humidity is first heated through a heating coil. The air is then adiabatically humidified by saturated water vapor at 4.5 psia. The exit air has a dry bulb temperature of 90 oF and wet bulb temperature 65 oF. Air is supplied at a volume flow rate of 478.5 cfm. Assume sea level pressure throughout. Determine the following. a) Show the inlet and outlet air condition clearly on the psychrometric...
Humid air at 155 kPa, 40°C, and 70 percent relative humidity is cooled at constant pressure...
Humid air at 155 kPa, 40°C, and 70 percent relative humidity is cooled at constant pressure in a pipe to its dew-point temperature. Calculate the heat transfer, in kJ/kg dry air, required for this process. Use data from the tables. The heat transfer is  kJ/kg dry air.
Relative humidity isn't everything. Why is it that outdoor air of 80 Fo at 55% humidity...
Relative humidity isn't everything. Why is it that outdoor air of 80 Fo at 55% humidity will feel more “muggy” than a 50 Fo cave at 75% humidity? What other parameter is a better measure of the actual amount of moisture in the air, and how do we define it? Then give two examples of when keeping close track of moisture in the air is important.
Relative humidity isn't everything. Why is it that outdoor air of 80 Fo at 55% humidity...
Relative humidity isn't everything. Why is it that outdoor air of 80 Fo at 55% humidity will feel more “muggy” than a 50 Fo cave at 75% humidity? What other parameter is a better measure of the actual amount of moisture in the air, and how do we define it? Then give two examples of when keeping close track of moisture in the air is important.
Air enters an air conditioning unit at 32oC, 80% relative humidity, and with a mass flowrate...
Air enters an air conditioning unit at 32oC, 80% relative humidity, and with a mass flowrate of 12 kg/min. It is to be conditioned to 25oC and 50% relative humidity. In order to do this, part of the moisture in the air must be removed as condensate at 30oC. Be able to draw the path that the atmospheric air takes on the psychrometric chart. Find a. The rate of moisture removal from the air, mw  b. The rate of...
Air enters a window air conditioner at 1 atm, 36oC and 75% relative humidity (??) at...
Air enters a window air conditioner at 1 atm, 36oC and 75% relative humidity (??) at a rate of 12m3/min and it leaves as saturated air at 18oC. Part of the moisture in the air which condenses during the process is also removed at 18oC. Determine (a) the rate of heat (Q?) and (b) moisture removal from the air. (c) What-if Scenario: What would the rate of heat removal be if moist air entered the dehumidifier at 95 kPa instead...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT