Enter the cooling (BTU/hr) and the power consumed (W/hr) into the calculator to determine the Chiller Efficiency.

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## Chiller Efficiency Formula

The following formula is used to calculate the Chiller Efficiency.

**Echill = C/ PC *100**

- Where Echill is the Chiller Efficiency (%)
- C is the cooling (BTU/hr)
- PC is the power consumed (W/hr)

## How to Calculate Chiller Efficiency?

The following two example problems outline how to calculate the Chiller Efficiency.

**Example Problem #1:**

- First, determine the cooling (BTU/hr). In this example, the cooling (BTU/hr) is given as 140.
- Next, determine the power consumed (W/hr). For this problem, the power consumed (W/hr) is given as 200.
- Finally, calculate the Chiller Efficiency using the equation above:

Echill = C/ PC *100

Inserting the values from above and solving the equation:

Echill = 140/200 *100 = 70 (%)

**Example Problem #2: **

Using the same process as above, first define the variables required by the formula. In this case, these values are:

cooling (BTU/hr) = 300

power consumed (W/hr) = 500

Entering these values yields:

Echill = 300/ 500 *100 = 60 (%)