Heat exchangers are classified according to transfer processes into indirect- and direct- contact types. FIGURE 1.2 (a) Classification according to process function; (b) classification of condensers; (c) classification of liquid-to-vapor phase-change exchangers.
What is the application of heat exchanger?
Heat exchangers are used to transfer heat from one medium to another. These media may be a gas, liquid, or a combination of both. The media may be separated by a solid wall to prevent mixing or may be in direct contact.
What is the principle of heat exchanger?
The essential principle of a heat exchanger is that it transfers the heat without transferring the fluid that carries the heat. Photo: How a simple heat exchanger works.May 4, 2021
What are the disadvantages of heat exchanger?
Leakage and pressure drops in the system are two possible disadvantages of heat exchangers. Leakage in the process of heat transfer is difficult to prevent and repair. In fact, many heat exchangers need to be taken apart entirely in order to fix a leak.
How do you Retube an exchanger?
- Remove damaged, corroded, or worn out tubes.
- Clean and prep tube sheets.
- Provide the replacement tubes you need (or work with customer-supplied tubes)
- Install new tubing.
- Assist in pressure or hydro testing the heat exchanger.
- Evacuate, charge, and restart the system.
What is Retubing of heat exchanger?
https://www.youtube.com/watch?v=fdyCDRwIIBM
How do you maintain a heat exchanger?
To maintain efficient operation, keep the heat transfer surfaces of the heat exchanger clean. Cleaning chemicals depend on the same variables for a plate-and-frame heat exchanger, and cleaning compounds must be compatible with the metallurgy of the heat exchanger.
How is heat exchanger measured?
2.1 Temperature measurement in heat exchangers: Many different types of temperature-measuring instruments exist. For heat exchanger performance monitoring, instruments and probes based on electrical effects are most common; specifically, RTDs, thermistors, and thermocouples are used.
What are the three 3 types of heat exchanger?
- Finned Tube Heat Exchanger Or Air Cooled Heat Exchanger. Suitable for: air/gas to fluid.
- Shell And Tube Heat Exchanger. Suitable for: fluid to fluid / fluid to gas.
- Plate Heat Exchanger Or Gasket Plate Heat Exchanger. Suitable for: fluid to fluid / fluid to vapour.
What are heat exchangers and mention its types?
Type of Heat Exchanger Common Industries and Applications
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Condensers Distillation and refinement processes Power plants Refrigeration HVAC Chemical processing
Evaporators/Boilers Distillation and refinement processes Steam trains Refrigeration HVAC
How are heat exchangers classified Mcq?
Based upon the nature of heat exchange process, the heat exchangers are classified into how many categories. Solution: Direct contact, regenerators and recuperators.
What are different types of heat exchanger?
- Double Tube Heat Exchangers: Double tube heat exchangers use what is known as a tube within a tube structure.
- Shell and Tube Heat Exchangers:
- Tube in Tube Heat Exchangers:
- Plate Heat Exchangers:
What are 3 examples of a heat exchanger?
- Shell and tube heat exchangers.
- Double pipe heat exchangers.
- Plate heat exchangers.
- Condensers, evaporators, and boilers.
What is the most common heat exchanger?
The shell-and-tube heat exchanger is probably the most common type found in industry. It is widely used in the process industries as well as in many types of HVAC equipment.Apr 1, 2000