# Heat Exchanger Calculations

• drkidd22

#### drkidd22

Hello,
I'm working with a heat exchanger I'm trying to integrate into a cooling application. I've done some tests but want to have some clear understating of how the calculations are done or if I have missed something. Below is what I have so far.
So it's a radiation with 2 pwm fans, they push air through the radiator. It has a 1.7gpm water flow through the loop.

Air temp into fans: 30.1C
Air temp out fans (rear radiator): 59.2C
Input water temp to radiator: 64.8C

So what I get from this is that the radiator is removing 8.3C from the water temp. How would this translate to actual power or BTUs dissipated by the radiator?

drkidd22 said:
1.7gpm water flow
drkidd22 said:
8.3C from the water temp
drkidd22 said:
actual power or BTUs
Power? You want BTU/hr if you're interested in English units. What's the definition of BTU?

## What is a heat exchanger and how does it work?

A heat exchanger is a device used to transfer thermal energy between two fluids at different temperatures. It works by allowing the fluids to flow through separate channels, with one fluid being heated or cooled by the other fluid through a conductive barrier.

## What factors affect the performance of a heat exchanger?

The performance of a heat exchanger is affected by factors such as the flow rate, temperature difference, surface area, and type of fluids used. The design and materials of the heat exchanger also play a role in its performance.

## How do you calculate the heat transfer rate in a heat exchanger?

The heat transfer rate in a heat exchanger can be calculated by multiplying the overall heat transfer coefficient by the temperature difference between the two fluids and the surface area of the heat exchanger. This can be further refined by using specific equations for different types of heat exchangers.

## What are some common types of heat exchangers?

Some common types of heat exchangers include shell and tube, plate and frame, and double pipe heat exchangers. Each type has its own advantages and is suitable for different applications.

## What are some important considerations when designing a heat exchanger?

When designing a heat exchanger, factors such as the required heat transfer rate, fluid properties, space constraints, and cost must be taken into account. It is also important to consider the operating conditions and potential fouling or corrosion issues that may affect the performance of the heat exchanger.