Operation of an Air Conditioner

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Consider an air cooler operating at a constant pressure of 1 atm. Use the sliders to set the temperature and relative humidity of the inlet air stream.

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This Demonstration computes the amount of water condensed (in kg) and heat removed (in kJ) after you set the temperature of the cooled outlet air stream. It also gives the fraction of water that is condensed during the cooling process. Note that a basis for the calculation of 1 kg dry air is taken.

In addition, these thermal properties of both the inlet and outlet air streams are listed:

1. the dry-bulb temperature

2. the wet-bulb temperature

3. the dew point temperature

4. the relative humidity

5. the absolute humidity or moisture content

6. the humid volume

7. the specific enthalpy

Things to try out or check:

1. For a fixed temperature of the cold outlet air stream, increase the value of the relative humidity of the inlet air stream. As expected, you will observe an increase in the amount of condensed water.

2. The values of the wet-bulb, dry-bulb and dew point temperatures of the outlet air stream are identical. This is expected because we assume that this stream is saturated (i.e. the relative humidity is 100%).

3. For fixed temperature and relative humidity values of the inlet air stream, decrease the temperature of the cooled outlet air stream. As expected, you will observe an increase in the amount of heat removed.

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Contributed by: Housam Binous and Ahmed Bellagi (October 2016)
Open content licensed under CC BY-NC-SA


Snapshots


Details

Reference

[1] R. M. Felder and R. W. Rousseau, Elementary Principles of Chemical Processes, 3rd ed., New York: John Wiley & Sons, 2005.



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