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Heat Transfer and Cooling Techniques At Low Temperature - Coggle Diagram
Heat Transfer and Cooling Techniques At Low Temperature
Heat Transfer Methods
Thermal Conduction
Conduction in Solid
Conduction in Liquid
Conduction in Gas
Thermal Radiation
Any surface at finite temperature
Absorbs EM radiation
Emit EM radiation
emitted radiation, Φ
-continuous
-nonuniform
-temperature dependent
Reflect EM radiation
Radiation exchange between 2 surface
Thermal Convection
Natural Convection
Forced Convection
Boiling Convection
Cooling Techniques
Wet Method - Cryogenic fluid is used in contact with the device
Bath
Saturated Bath
Superfluid Helium(He II) Bath
Dry Method - Cryocooler is used without any fluid as coolant
Indirect Cooling Method - Cryogenic fluid is used without direct contact with the device but only through intermediate components
Forced Flow Method - Reduce amount of cryogen, especially in indirect cooling composed of a network peripheral tube
Cryogen-free Cooling Method - Using a conductive thermal link between cold source (the cryocooler) and the low temperature device