# How do you calculate gpm in a chilled water system?

**GPM**X 500 X Temp Rise Typical

**chilled water system**design flow rates 2.4

**GPM**per ton (assuming 10oF difference between entering and leaving temperatures) Evaporation rate of cooling tower condenser

**water**3

**GPM**per 100 tons Condenser

**water**flow rate requirement 3

**GPM**per ton BTU per ton of cooling 12,000 BTU = 1 ton

In this regard, how do you calculate gpm through a chiller?

Multiply the fluid's horsepower by 3960. If the **chiller** works at 25 horsepower: 25 x 3960 = 99,000. Multiply your answer by the pump's efficiency. If the pump works at 80 percent efficiency: 99,000 x 0.80 = 79,200.

One may also ask, what is the formula for GPM? The **formula** to find **GPM** is 60 divided by the seconds it takes to fill a one gallon container (60 / seconds = **GPM**). Example: The one gallon container fills in 5 seconds. 60 / 5 = 12 **GPM**. (60 divided by 5 equals 12 **gallons per minute**.)

Regarding this, how do you calculate chilled water flow rate?

**Chilled Water Systems**

- Total Heat Removed. The total heat removed by an air condition chilled-water system can be calculated. h = 500 q dt (1) where.
- Evaporator Flow Rate. The evaporator water flow rate can be calculated. q
_{e}= h_{tons}24 / dt (2) where. - Condenser Flow Rate. The condenser water flow rate: q
_{c}= h_{tons}30 / dt (3) where.

How many GPM are in a ton?

= GPM X 500 X Temp Rise Typical chilled water system design flow rates **2.4 GPM** per ton (assuming 10oF difference between entering and leaving temperatures) Evaporation rate of cooling tower condenser water **3 GPM** per 100 tons Condenser water flow rate requirement **3 GPM** per ton BTU per ton of cooling 12,000 BTU = 1 ton