Boiler Flow Rate Calculator

To calculate the flow rate of a boiler, multiply the boiler’s power (in kW) by 3600, and divide the result by the product of the temperature difference (ΔT) and the specific heat capacity of water (4.186 kJ/kg°C). This gives you the flow rate in liters per hour.

The Boiler Flow Rate Calculator is a tool designed to calculate the flow rate of water in a boiler system. By using the boiler’s power and the temperature difference, the calculator helps ensure your boiler is operating efficiently. It’s perfect for residential and industrial systems.

Formula:

Contents

1 Formula:
2 Example Calculation:
3 What is Boiler Flow Rate Calculator ?

$FR = \frac{P \times 3600}{\Delta T \times 4.186$

Where:

FR = Flow Rate (liters per hour)
P = Power of the boiler (in kW)
ΔT = Temperature difference (in °C)
4.186 = Specific heat capacity of water (kJ/kg°C)

Variable	Description
FR	Flow Rate (in liters per hour)
P	Boiler Power (in kW)
ΔT	Temperature Difference (°C)
4.186	Specific heat capacity of water (kJ/kg°C)

Example Calculation:

Let’s say the boiler has a power of 30 kW and the temperature difference (ΔT) between the water entering and leaving the boiler is 20°C.

Using the formula:

$FR = \frac{30 \times 3600}{20 \times 4.186} = \frac{108000}{83.72} \approx 1289.33 \, \text{liters per hour$

So, the boiler’s flow rate is approximately 1289.33 liters per hour.

Step	Calculation	Result
1	Multiply boiler power by 3600	$30 \times 3600 = 108000$ kWh
2	Multiply the temperature difference by 4.186	$20 \times 4.186 = 83.72$
3	Divide the result of Step 1 by the result of Step 2	$\frac{108000}{83.72} = 1289.33 \, \text{L/h}$

What is Boiler Flow Rate Calculator ?

A Boiler Flow Rate Calculator is used to determine the amount of water or steam that flows through a boiler, usually expressed in liters per minute (L/min) for combi boilers or kilograms per hour (kg/hr) for steam boilers. To calculate the flow rate of a boiler, you can use the the formula

For combi boilers, the flow rate affects the hot water delivery, with larger boilers typically offering higher flow rates. Using a combi boiler flow rate calculator allows you to determine the correct size of the boiler based on the desired water flow.

For central heating, a central heating flow rate calculation helps ensure the system is delivering enough hot water to radiators for efficient heating.

Other tools like the steam flow rate calculator or water flow rate calculator based on pressure and pipe diameter are essential for determining the flow through piping systems. These calculations ensure the boiler is running at optimal performance and can handle the required heating or steam output.