The Application of Thermal Transpiration to a Gaseous Pump
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A direct thermal-to-pneumatic energy converter utilizing the principle of thermal transpiration through a porous membrane is described. The applicability of this no-moving-part pump to a fluidic control system is discussed. A laboratory model has been constructed and experimentally evaluated for several gases, membrane types, and temperature ranges. A theoretical model is derived from the binary diffusion equations of kinetic theory. A linearized version of this model is verified experimentally for small temperature gradients. The kinetic theory model is evaluated numerically to predict the static performance of a pump for large temperature gradients.
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1975 ◽
Vol 97
(1)
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pp. 64-71
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Keyword(s):
2007 ◽
Vol 50
(17-18)
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pp. 3599-3615
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Keyword(s):
Keyword(s):
1979 ◽
Vol 71
(1)
◽
pp. 339-350
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