Psychrometric Charts

Psychrometric Charts

Psychrometric Charts

11/20/17

“How can we create a chart of a temperature comfort range?”

 

We all know that many different external factors can affect one’s temperature comfort zone. For example, 28 degrees centigrade can feel either pleasant or horrific depending on the relative humidity. So how can we relate all of these complex variables together in a coherent way? Well, many good Engineers, Architects, and Scientists took on this challenge, and decided to create a chart that takes in Dry-bulb (or absolute) temperature, Wet-bulb, Dew Point, Relative Humidity, Humidity Ratio, Specific Enthalpy, and Specific Volume of the local atmosphere to produce a visualization of a temperature comfort range. This is known as a psychometric chart and is one of the most important foundations of modern HVAC engineering.

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