1964: it was invented in Los Alamos National Laboratory.
1964-1970: peak of theoretical research, nearly 1000 papers published.
1970-1980: confidential application research, energy-saving application research such as space nuclear power supply, electronic instrument heat dissipation, space vehicle average temperature, etc., heat pipe heat exchanger, solar power generation, high chemical reactor.
1980-2000: electronic and electrical heat dissipation, computer CPU heat dissipation, large air preheater, high temperature heat pipe heat exchanger, high temperature and high pressure chemical reactor.
2000-2010: high micro heat pipe technology, high temperature large heat pipe technology, high heat pipe reaction equipment technology, various high heat pipe heat exchange equipment.
[basic characteristics of heat pipe]
Phase change heat transfer, high heat transfer efficiency;
The internal thermal resistance is very small and the equivalent thermal conductivity is high;
Flexible structure and shape size;
It has a good isothermal surface;
Evaporation section and condensation section can be separated far away;
The heat flux density of input and output can be changed;
The thermosyphon has unidirectional thermal conductivity.
[heat pipe classification]
According to the working fluid reflux power, there are core heat pipe, two-phase closed thermosyphon (also known as gravity heat pipe), gravity assisted heat pipe, rotary heat pipe, electrohydrodynamic heat pipe, magnetohydrodynamic heat pipe, osmotic heat pipe, etc.
According to the working temperature in the heat pipe, it can be divided into low temperature heat pipe, normal temperature heat pipe, medium temperature heat pipe, high temperature heat pipe, etc.
According to the combination of shell and working liquid, the copper water heat pipe, carbon steel water heat pipe, aluminum acetone heat pipe, carbon steel naphthalene heat pipe and stainless steel sodium heat pipe are distinguished.
According to the structure, common heat pipe, separated heat pipe, capillary pump loop heat pipe, micro heat pipe, flat heat pipe and radial heat pipe are distinguished.
According to the function of heat pipe, heat pipe, heat diode, heat switch, heat pipe for heat control, simulation heat pipe, refrigeration heat pipe, etc.