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Development of Heat-treatment Furnace with Maximum Uniform Zone using Gas-phase Condensing Heat Exchange  

Hong, Hyun-Seon (Plant Engineering Center, Institute for Advanced Engineering)
Kong, Man-Seek (Plant Engineering Center, Institute for Advanced Engineering)
Kang, Hwan-Kook (Dongeun ATS Co)
Publication Information
Journal of the Korean Society for Heat Treatment / v.22, no.3, 2009 , pp. 162-168 More about this Journal
Abstract
A horizontal tube furnace with a wide uniform-temperature zone was developed using isothermal characteristics of a heat pipe. The heat pipe heating system consists of a concentric annular shaped stainless-steel container, sodium as a working fluid and a screen mesh wick structure. The performance test of the heat pipe revealed that temperature changes along seven consecutive positions of the heat pipe outer wall were less than${\pm}0.1^{\circ}C$, thereby ensuring the high isothermal property. The isothermal property of the heat pipe-adapted tube fumace was investigated and compared to a conventional non-heat pipe type tube furnace. The temperature distribution measurement showed that the uniform temperature zone, in which temperature change is less than${\pm}$1$^{\circ}$C, of the heat pipe employed tube furnace system was about three times longer compared to the conventional tube furnace system.
Keywords
Heat pipe; Isothermal furnace; Uniform-temperature; Wick; Sodium;
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