3. What is heat exchanger? Mass balance and energy balance equation of for the heat exchanger ? How to design an heat exchanger ?

Question

Accepted Answer

A heat exchanger is a device used to transfer heat between two or more fluids.

Heat exchangers are commonly used in various industries, such as HVAC, chemical processing, and power generation.
They can be classified into different types based on their construction and flow arrangement, such as shell and tube, plate, and finned.
The mass balance equation for a heat exchanger states that the mass flow rate of fluid entering the exchanger is equal to the mass flow rate of fluid exiting the exchanger.
The energy balance equation for a heat exchanger states that the heat transfer rate into the fluid is equal to the heat transfer rate out of the fluid.
Designing a heat exchanger involves determining the required heat transfer rate, selecting the appropriate type and size of exchanger, and optimizing the flow arrangement and surface area.
Factors to consider in heat exchanger design include fluid properties, pressure drop, fouling, and cost.
For example, in the design of a shell and tube heat exchanger, the number of tubes, tube diameter, tube length, and shell diameter are important design parameters.

Accepted Answer

Heat exchanger is example of cooler and heat work hot air to cooling water water tamprature is high and air tamprature is low

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