Humans generally feel comfortable between temperatures of 22 °C to 27 °C and a relative humidity of 40% to 60%.

In this application, air at 35 °C and 60% relative humidity will be conditioned into the human comfort zone, with the thermodynamic process plotted on a psychrometric chart. To do this, we will

Additionally, we will calculate

Functions for the lower and upper bounds of the human comfort zone.

Shade the human comfort zone between 22 °C and 27 °C.

Plot the human comfort zone on a psychrometric chart.

Initially the air is at a temperature of 35 °C at a relative humidity of 60%

Then, we cool the air, and calculate the temperature at saturation (that is, the temperature at which the relative humidity is 1).

We continue cooling along the saturation line until we reach 14 °C (in this process, water condenses out of the air).

Now we heat the air until it reaches 24 °C.

Hence the entire thermodynamic cycle can then be plotted.

Water removed in the cooling process (in kg water per kg dry air)

Heat removed in the cooling process (in J kg^-1)

Heat added in the heating process (in J kg^-1)