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7. Recommendations As the mrottling losses account for the majority of the energy losses in the cycles studied, methods of energy recovery must be developed. Pressure equalizations, while recovering some of the energy of compression, still create throttling irreversibilities that decrease the second law efficiency of the cycle. Research in this area continues to be done by Highquest Engineering Inc., which has developed many proprietary cycles that incorporate energy recovery techniques. The Cell-Model has already been applied to a highly efficient cycle invented by Dr. Bowie Keefer of Highquest Engineering Inc. This cycle directly recovers energy and uses it to partially power the system. In the search for more energy efficient cycles, due effort must be given to finding adsorbents that are more selective for the desired separation. As all real cycles will have some energy losses, the cycle can be made more energy efficient by finding the best adsorbent. The Cell-Model should be run with non-linear isotherms to see the effect of isotherm curvature. It is expected that non-linear isotherms will affect the Four-Step cycle (in which there are throttling energy losses) more than they will affect the Ideal Four-Step and Ideal Three-Step cycles. 146PDF Image | Energy Efficiency of Gas Separation Pressure Swing Adsorption
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