In this **water cooling capacity calculator chart**, we’ve used the **water cooling capacity formula** (**Q = m Cp ΔT**) to calculate the

**cooling capacity**in kW for various

**flow rates**and

**temperature differences**.

The **flow rate** is first converted from **L/min** to **kg/s** by dividing by **60** (to convert minutes to seconds) and multiplying by the **density of water** (approximately **1 kg/L**).

For example…

Flow rate:50 L/min=50 / 60 = 0.833 kg/sTemperature difference:5°CQ = 0.833 kg/s4.186 kJ/kg·°C5°C = 17.44 kWConverting to BTU/h:17.44 kW * 3,412.14 = 59,515 BTU/h

## Water Cooling Capacity Calculator

Flow Rate (L/min) | Flow Rate (kg/s) | Temp. Difference (°C) | Cooling Capacity (kW) | Cooling Capacity (BTU/h) |
---|---|---|---|---|

50 | 0.833 | 5 | 17.44 | 59,515 |

100 | 1.667 | 8 | 55.81 | 190,448 |

200 | 3.333 | 10 | 139.53 | 476,120 |

500 | 8.333 | 15 | 523.25 | 1,785,450 |

1000 | 16.667 | 20 | 1,395.33 | 4,761,200 |

## Water Cooling Capacity Formula

The formula is as follows:

**Q = m Cp ΔT**

Where:

**Q**is the**cooling capacity**(in kW or BTU/h)**m**is the**mass flow rate**of water (in kg/s)**Cp**is the**specific heat capacity**of water (4.186 kJ/kg·°C or 1 BTU/lb·°F)**ΔT**is the**temperature difference**between inlet and outlet water (in °C or °F)

Let’s break down this formula with an example:

Suppose we have a **cooling system** with a **water flow rate** of **2 kg/s**, and the **water temperature** increases by **8°C** as it passes through the system.

To calculate the **cooling capacity**:

**m**=**2 kg/s****Cp**=**4.186 kJ/kg·°C**(specific heat capacity of water)**ΔT**=**8°C**

Plugging these values into the formula:

**Q = 2 kg/s 4.186 kJ/kg·°C 8°C = 66.976 kW**

This means the system can remove approximately **67 kW** of **heat energy** per second from the process being cooled.

To convert this to **BTU/h**, we can multiply the result by **3,412.14** (the conversion factor from kW to BTU/h):

**66.976 kW * 3,412.14 = 228,517 BTU/h**

## How to Calculate Water Cooling Capacity?

Calculating **water cooling capacity** involves several steps and considerations. Here’s a detailed explanation of the process:

**Determine the water flow rate**: Measure the **volume of water** flowing through the system per unit time. This is typically expressed in **liters per minute (L/min)** or **gallons per minute (gpm)**. For the formula, you’ll need to convert this to **mass flow rate** in **kg/s**. To do this, multiply the volumetric flow rate by the **density of water** (approximately **1 kg/L**).

**Measure the temperature difference**: Use **thermometers** or **temperature sensors** to measure the **water temperature** at the inlet and outlet of the cooling system. The difference between these two temperatures is your **ΔT**.

**Know the specific heat capacity of water**: This is a constant value of **4.186 kJ/kg·°C** or **1 BTU/lb·°F**. However, be aware that this can vary slightly with **temperature** and **pressure**, so for extremely precise calculations in critical applications, you may need to adjust this value.

**Apply the formula**: Use the **Water Cooling Capacity Formula** (**Q = m Cp ΔT**) with the values you’ve gathered.

**Convert units if necessary**: Depending on your needs, you may want to convert the result to different units. Common conversions include **kW to BTU/h** or **horsepower**.

**Consider system efficiency**: Remember that the calculated value represents the **theoretical maximum cooling capacity**. In real-world applications, factors such as **heat exchanger efficiency**, **pipe insulation**, and **pump performance** can affect the actual cooling capacity.

**Account for environmental factors**: **Ambient temperature**, **humidity**, and other environmental conditions can impact the overall efficiency of the cooling system. In some cases, you may need to factor these into your calculations for more accurate results.

**Validate your results**: If possible, compare your calculated **cooling capacity** with measured data or equipment specifications to ensure **accuracy**.

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