Enter the sensible heat (kW) and the total heat (kW) into the calculator to determine the sensible heat ratio.

SHR Formula

The following formula is used to calculate a sensible heat ratio (SHR).

SHR = qs / qt

  • Where SHR is the sensible heat ratio
  • qs is the sensible heat (kW)
  • qt is the total heat (kW)

What is a sensible heat ratio (SHR)?

Definition:

A sensible heat ratio, or SHR for short, is a measure of the ratio of sensible heat to total heat that of an evaporator.

For example, if the sensible heat ratio was 1, then the evaporator would use all of its energy to cool air and non for dehumidification. (Not feasible).

How to calculate a sensible heat ratio?

Example Problem:

The following example outlines how to calculate a sensible heat ratio.

First, determine the sensible heat load. This is the heat or power used to cool air by the evaporator. In this example, the sensible load is 100 kW.

Next, determine the total heat load. This is the total power consumed by the evaporator. In this case, the total heat load is 125 kW.

Finally, calculate the SHR using the formula above:

SHR = qs / qt

SHR = 100 / 125

SHR = .80 = 80%