Vacuum furnace partial pressures can influence power input requirements
Amir Khalilollahi, Norbert E. Stainbrook
School of Engineering (Behrend)
The small Marketable Prototype (MPU) heat treating unit and quench system were developed for the many applications where only a single part or a small lot needs to be heat treated at a time such as in machine shops, educational institutions, and test facilities. Numerical analysis and testing were performed to gain insight to the effect of furnace chamber partial pressure on power input requirements. The numerical model allows conclusion that a computer code can predict the MPU furnace temperature vs. power input, or alternately predict the power requirement for a given temperature, for the whole range of partial pressures (O < P < Patm). For the first time an attempt is made to formulate the effects of both local pressure and temperature on thermal conductivity of the gas in a vacuum heat treat furnace model. Finally, it was quantitively shown that furnace power input requirements can be influenced by the type of gas, the partial pressure of the gas, shield emissivities, shield spacing, and the emissivity of the furnace cold wall.
36-38, 40
Specialist publication
Vacuum furnaces
Partial pressure
Fluid Flow and Transfer Processes
Khalilollahi, A., & Stainbrook, N. E. (1989). Vacuum furnace partial pressures can influence power input requirements. Industrial Heating, 56(11), 36-38, 40.
Khalilollahi, Amir ; Stainbrook, Norbert E. / Vacuum furnace partial pressures can influence power input requirements. In: Industrial Heating. 1989 ; Vol. 56, No. 11. pp. 36-38, 40.
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title = "Vacuum furnace partial pressures can influence power input requirements",
abstract = "The small Marketable Prototype (MPU) heat treating unit and quench system were developed for the many applications where only a single part or a small lot needs to be heat treated at a time such as in machine shops, educational institutions, and test facilities. Numerical analysis and testing were performed to gain insight to the effect of furnace chamber partial pressure on power input requirements. The numerical model allows conclusion that a computer code can predict the MPU furnace temperature vs. power input, or alternately predict the power requirement for a given temperature, for the whole range of partial pressures (O < P < Patm). For the first time an attempt is made to formulate the effects of both local pressure and temperature on thermal conductivity of the gas in a vacuum heat treat furnace model. Finally, it was quantitively shown that furnace power input requirements can be influenced by the type of gas, the partial pressure of the gas, shield emissivities, shield spacing, and the emissivity of the furnace cold wall.",
author = "Amir Khalilollahi and Stainbrook, {Norbert E.}",
pages = "36--38, 40",
journal = "Industrial Heating",
publisher = "Business News Pub. Co.",
Khalilollahi, A & Stainbrook, NE 1989, 'Vacuum furnace partial pressures can influence power input requirements' Industrial Heating, vol. 56, no. 11, pp. 36-38, 40.
Vacuum furnace partial pressures can influence power input requirements. / Khalilollahi, Amir; Stainbrook, Norbert E.
In: Industrial Heating, Vol. 56, No. 11, 01.11.1989, p. 36-38, 40.
T1 - Vacuum furnace partial pressures can influence power input requirements
AU - Khalilollahi, Amir
AU - Stainbrook, Norbert E.
N2 - The small Marketable Prototype (MPU) heat treating unit and quench system were developed for the many applications where only a single part or a small lot needs to be heat treated at a time such as in machine shops, educational institutions, and test facilities. Numerical analysis and testing were performed to gain insight to the effect of furnace chamber partial pressure on power input requirements. The numerical model allows conclusion that a computer code can predict the MPU furnace temperature vs. power input, or alternately predict the power requirement for a given temperature, for the whole range of partial pressures (O < P < Patm). For the first time an attempt is made to formulate the effects of both local pressure and temperature on thermal conductivity of the gas in a vacuum heat treat furnace model. Finally, it was quantitively shown that furnace power input requirements can be influenced by the type of gas, the partial pressure of the gas, shield emissivities, shield spacing, and the emissivity of the furnace cold wall.
AB - The small Marketable Prototype (MPU) heat treating unit and quench system were developed for the many applications where only a single part or a small lot needs to be heat treated at a time such as in machine shops, educational institutions, and test facilities. Numerical analysis and testing were performed to gain insight to the effect of furnace chamber partial pressure on power input requirements. The numerical model allows conclusion that a computer code can predict the MPU furnace temperature vs. power input, or alternately predict the power requirement for a given temperature, for the whole range of partial pressures (O < P < Patm). For the first time an attempt is made to formulate the effects of both local pressure and temperature on thermal conductivity of the gas in a vacuum heat treat furnace model. Finally, it was quantitively shown that furnace power input requirements can be influenced by the type of gas, the partial pressure of the gas, shield emissivities, shield spacing, and the emissivity of the furnace cold wall.
SP - 36-38, 40
JO - Industrial Heating
JF - Industrial Heating
Khalilollahi A, Stainbrook NE. Vacuum furnace partial pressures can influence power input requirements. Industrial Heating. 1989 Nov 1;56(11):36-38, 40.