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STIRLING ENGINE AND METHOD OF KEEPING SELECTED CONCENTRATIONOF TRACE QUANTITY OF ADDITION GAS IN WORKING GAS OF STIRLINGENGINE
STIRLING ENGINE AND METHOD OF KEEPING SELECTED CONCENTRATIONOF TRACE QUANTITY OF ADDITION GAS IN WORKING GAS OF STIRLINGENGINE
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机译：斯特林发动机及在斯特林发动机工作气体中保持微量气体选择浓度的方法
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摘要
A permeation barrier is maintained on inner surfaces of a Stirling engine, particularly the heat tubes, by maintaining a preselected concentration of dopant gas in the working gas, e.g. hydrogen. A dopant gas (10) is adsorbed on a sorbent (1) in a dopant cartridge or enclosure (2). The amount of gas adsorbed, the quantity of sorbent, and the permeability of a permeable window (3) are selected such that a preselected partial pressure of the dopant is maintained in the hydrogen. In a diffusion cell (FIGS. 1 and 2) an equilibrium partial pressure of the dopant gas is maintained by diffusion through the porous window. In a flow-through cell (FIGS. 3-5) the hydrogen or working gas is circulated through the sorbent. A fraction of the adsorbtion sites on the sorbent may be left open to adsorb excess water vapor from the hydrogen. In a trap cell (FIGS. 9 and 10) water vapor is removed from the working gas as the working gas is pumped by a compressor into a high pressure storage reservoir (59). An appropriate partial pressure of water vapor dopant is reintroduced into the hydrogen as the hydrogen passes from the high pressure reservoir through the trap cell back into the working volume of the Stirling engine. To facilitate handling of the activated sorbent cells without exposing the sorbent to contaminants, a collapsible barrier (29, 42) is provided for automatically isolating the sorbent when the cell is exposed to the atmosphere.
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