If you ignore specific volume and use standard density, you may undersize or oversize the fan.
A psychrometric chart is a graphical representation of the physical and thermodynamic properties of air, including its temperature, humidity, and volume. One of the key properties represented on a psychrometric chart is specific volume. psychrometric chart specific volume
"It’s too light," Leo muttered, noting the value. "The air is too thin to carry the heat away." If you ignore specific volume and use standard
Specific volume lines are steep, diagonal lines that slant from the bottom-right toward the top-left. They are generally steeper than constant enthalpy or wet-bulb lines. including its temperature
Here is a deep dive into understanding, locating, and applying specific volume using a psychrometric chart. What is Specific Volume? In thermodynamics, specific volume (