In response to the question, what is a heat exchanger? It should be said that exchangers are considered to be the most important heat transfer equipment between two liquid or gas fluids. Heat transfer in exchangers takes place due to the temperature difference between these fluids. In heat exchangers, it is possible that both fluids are liquid, gas or gas with liquid; For example, in systems like chillers, two heat exchangers are used at the same time. One of these converters is used to reduce the temperature of the desired fluid and the other converter called the condenser reduces the temperature of the refrigerant gas.
Types of heat exchangers and performance!
❌ Heat exchangers in terms of the contact surface of two fluids
❌ According to the flow surface of the two fluids
❌ Based on the mechanical structure and structure
Based on the contact surface of two fluids
Recuperative heat exchangers: In these heat exchangers, using a separating surface, hot and cold fluid are separated from each other and the transfer is done through the surface. It should be noted that the heat exchangers in the industry are more of this type.
Regenerative type heat exchanger: In this exchanger, the separating surface of cold and hot fluid is not fixed and Its parts are subject to movement with hot and cold fluid. The use of this type of heat exchanger is mostly done in laboratories and research environments.
Direct contact type heat exchangers: Cold and hot fluids in this contact heat exchanger are directly with each other; This means that there is no wall between them. In this converter, the streams are actually two immiscible liquids such as gas and liquid. One of the most important features of these converters is their high thermal efficiency. Cooling towers and Open Feed Water Heaters, which are used in steam power plants, are examples of these converters.