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Chilled Water BTU Calculator

Formula

To calculate the Chilled Water BTU ( $BTU$ ):

$BTU = Q \times \Delta T \times 500$

Where:

$BTU$ is the chilled water BTU
$Q$ is the flow rate in gallons per minute (gpm)
$\Delta T$ is the temperature difference in degrees Fahrenheit (°F)

What is Chilled Water BTU?

Chilled water BTU (British Thermal Units) is a measure of the energy required to cool water in a chilled water system. This energy is typically used in HVAC (Heating, Ventilation, and Air Conditioning) systems to provide cooling for buildings. The chilled water absorbs heat from the building and is then circulated back to a chiller where the heat is removed, and the cycle repeats. The BTU value helps in determining the efficiency and capacity of the cooling system.

Example Calculation 1

Let's assume the following values:

Flow Rate ( $Q$ ) = 10 gpm
Temperature Difference ( $\Delta T$ ) = 15 °F

Using the formula:

$BTU = 10 \times 15 \times 500 = 75000 \text{ BTU}$

The chilled water BTU is 75000 BTU.

Example Calculation 2

Let's assume the following values:

Flow Rate ( $Q$ ) = 20 gpm
Temperature Difference ( $\Delta T$ ) = 10 °F

Using the formula:

$BTU = 20 \times 10 \times 500 = 100000 \text{ BTU}$

The chilled water BTU is 100000 BTU.