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High Temperature Heat Pipe Furnaces for Material Processing
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English
Abstract
A heat pipe furnace development was carried out to demonstrate the potential of the heat pipe heating technique at temperatures up to 1500°C for future material processing purposes and for process temperature control in a microgravity environment. Two different types of heat pipes were developed, viz. a variable conductance heat pipe and a specially modified constant conductance heat pipe. Both types utilizing molybdenum 41 wt% rhenium and lithium as containment material and working fluid, respectively, were successfully operated in the temperature range 900°C to 1500°C. The variable conductance heat pipe employing a gas buffering technique provides an excellent temporal temperature stability of less than 80 mK at temperatures of 1300°C and above and a very good temperature measurement accuracy by means of working fluid vapour pressure measurement. The constant conductance heat pipe equipped with special provisions for vapour pressure measurement provides the furnace with a temporal temperature stability of .4K in the temperature range 900°C to 1500°C and a temperature measurement accuracy like that of the variable conductance heat pipe.
Authors
Citation
Brost, O. and Behrmann, P., "High Temperature Heat Pipe Furnaces for Material Processing," SAE Technical Paper 901305, 1990, https://doi.org/10.4271/901305.Also In
References
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