The Application of Thermal Transpiration to a Gaseous Pump

[+] Author and Article Information
P. A. Orner, G. B. Lammers

Case Western Reserve University, Cleveland, Ohio

J. Basic Eng 92(2), 294-302 (Jun 01, 1970) (9 pages) doi:10.1115/1.3424991 History: Received July 14, 1969; Online October 27, 2010


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.

Copyright © 1970 by ASME
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