## Introduction

## How to Use

Using the Coaxial Heat Exchanger Calculator is straightforward. Follow these steps:

- Input the hotter temperature (T2) in the designated field. This is the temperature of the hot fluid stream.
- Input the lower temperature (T1) in the provided space. This is the temperature of the cold fluid stream.
- Specify the heat transfer coefficient (U) in the respective box. The heat transfer coefficient is a measure of how efficiently heat is transferred between the fluids.
- Enter the area (A) of the heat exchanger in the provided field. This is the surface area through which heat is exchanged.

## Formula

The formula used by this calculator to determine the heat transfer (Q) in the coaxial heat exchanger is:

**Q = U × A × LMTD**

Where:

**Q**is the heat transfer rate.**U**is the heat transfer coefficient.**A**is the area of the heat exchanger.**LMTD**is the Log Mean Temperature Difference between the two fluid streams, which is a calculated value.

## Example

Let’s illustrate how this calculator works with an example:

Suppose you have a coaxial heat exchanger with the following parameters:

- Hotter temperature (T2) = 150°C
- Lower temperature (T1) = 50°C
- Heat transfer coefficient (U) = 250 W/m²°C
- Area (A) = 2 m²

By plugging these values into the calculator, you will find the heat transfer rate (Q):

**Q = U × A × LMTD**

**Q = 250 W/m²°C × 2 m² × LMTD**

Now, you can calculate LMTD using standard methods and then use it to find the heat transfer rate.

## FAQ’s

**Q1. What is Log Mean Temperature Difference (LMTD)?**

The Log Mean Temperature Difference (LMTD) is a parameter used in heat exchanger calculations. It is a measure of the temperature difference between the two fluid streams over the length of the heat exchanger.

**Q2. What are the units of heat transfer coefficient (U)?**

The units of heat transfer coefficient (U) are typically Watts per square meter per degree Celsius (W/m²°C) in the International System of Units (SI).

**Q3. Can this calculator be used for different units of temperature and area?**

Yes, you can use different units for temperature and area, but make sure they are consistent. The calculator will provide the result in the units you input.

## Conclusion

The Coaxial Heat Exchanger Calculator simplifies the process of determining heat transfer in a coaxial heat exchanger. By providing the necessary input values, you can quickly find the heat transfer rate using the formula Q = U × A × LMTD. This tool is valuable for engineers and professionals working in heat exchanger design and analysis. Try it out to streamline your calculations and make your work more efficient.