Heat Exchanger Sizing Calculator

If you're in need of determining the dimensions and specifications for a new heat exchanger, you've come to the right place. Our Heat Exchanger Sizing Calculator is designed to assist engineers and technicians in selecting the most suitable heat exchanger for their specific project requirements. With extensive experience in the industry, we understand that the selection process for heat exchangers involves a range of factors and parameters, including heat transfer coefficient, fluid flow rates, pressure drops, and more. Our user-friendly tool allows you to input your project details and our algorithm will calculate the optimal dimensions for the heat exchanger. This ensures that your system is operating efficiently and effectively, and saves you both time and resources in the long run. Try our Heat Exchanger Sizing Calculator today and take the first step towards successful project completion!

Heat Exchanger Sizing Calculator

Calculate the size of a heat exchanger based on given parameters.

Heat Exchanger Sizing Calculator Results
Heat Transfer Rate0
Temperature Difference0
Overall Heat Transfer Coefficient0
Fluid Flow Rate0
Inlet Temperature0
Outlet Temperature0
Heat Exchanger Size0

properly sizing heat exchangers is vital in many industrial processes. Our heat exchanger sizing calculator simplifies this task. To gain a deeper understanding of heat transfer and related calculations, consider linking it with our heat calculator. This combination provides a comprehensive approach to heat exchanger design and analysis.

How to use heat Exchange Sizing Calculator

Heat exchangers are essential devices used in various industrial processes for efficient heat transfer between two or more fluids. The Heat Exchanger Sizing Calculator is a useful tool that calculates the required size of a heat exchanger based on specific input parameters. This calculator is significant because it ensures optimal design and selection of a heat exchanger that meets the required heat transfer capacity for a given application.

The primary applications of the Heat Exchanger Sizing Calculator are in the chemical, petroleum, HVAC, and power generation industries. The calculator can be used to determine the appropriate size of a heat exchanger for various processes such as heating, cooling, and heat recovery. This tool is also useful in designing new heat exchangers or optimizing existing ones.

Instructions for Utilizing the Calculator

The Heat Exchanger Sizing Calculator requires five input parameters to calculate the size of a heat exchanger. These parameters include the heat transfer rate, temperature difference, overall heat transfer coefficient, fluid flow rate, inlet temperature, and outlet temperature.

The heat transfer rate is the amount of heat transferred per unit time and is measured in kilowatts (kW). The temperature difference is the difference between the hot and cold fluids and is measured in degrees Celsius (°C).

The overall heat transfer coefficient is the measure of the ability of the heat exchanger to transfer heat and is measured in kW/(m². °C).

The fluid flow rate is the volume of fluid that passes through the heat exchanger per unit time and is measured in cubic meters per hour (m³/h). The inlet and outlet temperatures are the temperatures of the hot and cold fluids, respectively.

After providing the required input data, the calculator generates one output value, which is the size of the heat exchanger required to meet the given heat transfer capacity.

Heat Exchanger Sizing Calculator Formula

The Heat Exchanger Sizing Calculator formula is based on the following equation:

Heat exchanger size = (heat transfer rate x temperature difference / overall heat transfer coefficient) / (fluid flow rate x (inlet temperature - outlet temperature))

The formula shows that the heat exchanger size is directly proportional to the heat transfer rate and temperature difference, while it is inversely proportional to the overall heat transfer coefficient, fluid flow rate, and the difference between the inlet and outlet temperatures.


Suppose we need to determine the size of a heat exchanger required to transfer 50 kW of heat from a fluid at 150°C to another fluid at 50°C. The overall heat transfer coefficient is 300 kW/(m².°C), and the fluid flow rate is 5 m³/h. The inlet and outlet temperatures are 160°C and 40°C, respectively.

Using the Heat Exchanger Sizing Calculator formula, the required heat exchanger size is:

Heat exchanger size = (50 x (150 - 50) / 300) / (5 x (160 - 40)) = 0.002 m² or 20.9 ft²

Therefore, a heat exchanger with a surface area of approximately 20.9 square feet is required to transfer 50 kW of heat between the two fluids.

Illustrative Table Example

Example Table Here is an example table demonstrating how the heat exchanger sizing calculator works with different input values:

Heat Transfer Rate (kW)Temperature Difference (°C)Overall Heat Transfer Coefficient (kW/(m².°C))Fluid Flow Rate (m³/h)Inlet Temperature (°C)Outlet Temperature (°C)Heat Exchanger Size

The heat exchanger sizing calculator is an essential tool for engineers and technicians involved in the design and installation of heat exchangers. This calculator can help ensure that heat exchangers are properly sized to meet specific application requirements, reducing the risk of under or oversized equipment. By understanding the input fields and the output data, users can make informed decisions and ensure the efficient operation of heat exchangers. With the instructions provided in this post, you can now confidently use the heat exchanger sizing calculator and apply it to your work.

About the Author

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Zayan Chowdhury
Theoretical physicist

Zayan Chowdhury is a theoretical physicist with a passion for exploring the fundamental laws of the universe. He is deeply interested in understanding the nature of dark matter and dark energy, and how they influence the evolution of the cosmos. Zayan has published several papers on topics ranging from black hole thermodynamics to quantum gravity, and his work has been recognized by leading physicists in the field. In his free time, Zayan enjoys reading philosophy and exploring the great outdoors.