Tubular Heat Exchanger / Shell and Tube Heat Exchanger
A heat exchanger is a device that transfers thermal energy between two fluids (hot and cold) without allowing them to mix. It is critical in industries such as chemical processing, petroleum refining, power generation, food production, and more. Common applications include heating, cooling, condensation, evaporation, and reboiling.
Tubular Heat Exchanger / Shell and Tube Heat Exchanger
A heat exchanger is a device that transfers thermal energy between two fluids (hot and cold) without allowing them to mix. It is critical in industries such as chemical processing, petroleum refining, power generation, food production, and more. Common applications include heating, cooling, condensation, evaporation, and reboiling.
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Classification by Heat Transfer Principle
- Fluids flow in separate channels divided by a solid wall, transferring heat through conduction and convection.
- Types:
- Shell-and-Tube: Most widely used in industrial processes.
- Double-Pipe: Simple design for small-scale or high-pressure applications.
- Plate-and-Frame: Compact and efficient for moderate temperature/pressure conditions.
- Uses a solid matrix (e.g., ceramic, metal) to alternately absorb heat from a hot fluid and release it to a cold fluid.
- Types:
- Rotary**: Rotating matrix for continuous heat exchange.
- Valve-Switched**: Periodic flow reversal via valves.
- Connects two surface exchangers via a circulating heat carrier (e.g., thermal oil). The carrier absorbs heat from the hot fluid and releases it to the cold fluid.
- Fluids mix directly to transfer heat.
- Examples**: Cooling towers, gas condensers.
- Combines indirect surface heat transfer (e.g., steam-to-water) with direct fluid mixing (e.g., water-to-water).
- Advantages: Higher efficiency than pure indirect systems; greater stability and lower noise than direct-contact systems.
Classification by Application
- Raises fluid temperature without inducing phase change (e.g., oil preheating).
- Prepares fluids to meet specific process parameters before entering downstream equipment.
- Heats gases or steam beyond their saturation temperature (e.g., superheated steam for turbines).
- Vaporizes liquids by heating them above their boiling point (common in refrigeration, desalination).
