EVERYTHING YOU CAN KNOW ABOUT HEAT EXCHANGER

 

A heat exchanger is a device designed to transfer heat between two or more fluids with different temperatures (ie liquid, vapor or gas). Depending on the type of heat exchanger used, the heat transfer process can be gas-to-gas, liquid-to-gas or liquid-to-liquid and takes place through a solid separator that prevents fluid mixing or direct fluid contact. Other design features, including building materials and components, heat transfer mechanisms, and flow configuration, also help to classify the types of heat exchangers available. After discovering applications in a wide range of industries, we designed and manufactured a variety of heat exchange equipment used in heating and cooling processes.

This article focuses on heat exchangers, exploring various available designs and types, and explaining their respective functions and mechanisms. In addition, this article outlines the selection considerations and common applications of each type of heat exchange equipment.

Heat Exchanger thermodynamics

The design of heat exchangers is an exercise in thermodynamics. Thermodynamics is a science involving the flow of thermal energy, temperature, and the relationship with other forms of energy. To understand the thermodynamics of heat exchangers, a good starting point is to learn the three methods of heat transfer, conduction, convection and radiation. In the following sections, each heat transfer mode will be introduced.

Conductivity

Conduction is the transfer of heat energy between materials in contact with each other. Temperature is a measure of the average kinetic energy of the molecules in a material-warmer objects (at higher temperatures) exhibit more molecular motion. When a hotter object comes into contact with a colder object (an object at a lower temperature), heat energy transfer occurs between the two materials, the colder object becomes more energy, and the hotter object Becomes less energy. This process will continue until thermal equilibrium is reached.

The rate of heat transfer in the material through heat conduction is given by the following expression.

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