Dynamic analysis of an electrostatic compressor

Sathe, Abhijit A.; Groll, Eckhard A.; Garimella, Suresh V.

doi:10.1016/j.ijrefrig.2010.04.004

Cited by 14 publications

(6 citation statements)

References 13 publications

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“…In this study, the actuation frequency is assumed as 50 Hz. This assumption is based on the study by Sathe et al., 23 in which the exhaustive process of a pump similar to the present design can be accomplished within 20 ms under 50 V of actuation and the consumed time of the discharge process decreases as the actuation increases. The volumetric efficiency is set as the maximum volumetric efficiency considering that no gas is trapped in the inlet valve.…”

Section: Resultsmentioning

confidence: 95%

Effect of flexible microvalves on the output performance of electrostatically actuated micropumps

Wang

Zhao

Ding

2012

Proceedings of the Institution of Mechanical Engineers, Part C:

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This article analyzes the effect of electrostatically actuated flexible microvalves on the output performance of electrostatic micropumps. The existence of microvalves affects the pressure rise and volumetric efficiency of micropumps. The effects of valve volume on the pressure rises of pumps with single and double cavities are predicted by integrating energy minimization with the analytical solutions for circular membrane deflection under uniform pressure. Outlet valve resistance is analytically specified as well. The micropumps could achieve their maximum volumetric efficiency in the case of zero back pressure. However, the design of the inlet valve leads to gas trapping in the inlet valve during discharge. In such a situation, the volumetric efficiency of the pumps drops along with the increase of pressure rise. Moreover, the flexibility of valve plates yields a much lower voltage than the cavity actuation for the valve closing and the breakdown voltage of the dielectric layer on the valve body, thereby enhancing the reliability of the microvalves.

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Section: Resultsmentioning

confidence: 95%

Effect of flexible microvalves on the output performance of electrostatically actuated micropumps

Wang

Zhao

Ding

2012

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Traditional mechanical pumping methods are often used but they lack high effectiveness with only a 60-75% isentropic efficiency. 23,24 An electrochemical ammonia compression process can be highly efficient, as it is noiseless and vibration free. However, for the electrochemical compression of ammonia, the decomposition of ammonia must be avoided when operating at higher voltages, as the ammonia can be electrochemically oxidized.…”

Section: Electrochemical Ammonia Compression and Purificationmentioning

confidence: 99%

Electrochemical Gas Separations for Green Energy Integration

Stracensky,

2024

Electrochem. Soc. Interface

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Separation and purification of molecules and compounds is one of the fundamental processes of chemistry and a hugely important factor in industrialization, accounting for as much as 15% of world’s energy consumption. As the world tries to limit and reduce the effects of climate change, simultaneous development of a green chemical economy and carbon sequestration strategies are needed. Both these goals need to effectively and efficiently separate gas phase molecules to make the implementation of these technologies feasible, requiring an even higher demand for economical and green gas phase separation. The current methods of gas phase separation used in industry rely predominantly on inefficient processes, such as cryogenic distillation or temperature or pressure swing absorption. Gas phase separation by electrochemical means can offer theoretically high energy efficiency separation, as the energy supplied can operate exclusively on the molecule of interest, if proper material and design criteria are met, while traditional methods act upon the entire gas mixture. Additionally, electrochemical separations can reduce the number of steps needed as they can simultaneously separate and compress the purified gas, easing the demand for high energy processing required when using mechanical pumps. However, the effectiveness of these technologies depends largely on the operating conditions and materials that make up the electrochemical cell. Thus, a key factor driving improvement in this field relies heavily on material development, such as improved membranes/separators, catalysts, and other cell materials which can in turn give rise to novel techniques and high performance of the electrochemically driven devices. Electrochemical gas phase separations integrated with green energy are critical to reaching climate change targets, but they in turn rely on the development of novel materials at enlarged scales and implementation of these technologies at reduced costs. In this article, we discuss the principles and applications of three electrochemical gas separations: hydrogen (H2) pump, ammonia (NH3)compression, and carbon dioxide (CO2) separation.

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“…Lei et al [27] analyzed the causes of the diaphragm compressor exhaust volume decrease and proposes the corresponding elimination method. Sathe et al [28] analyzed the dynamic effects of diaphragm movement in a pumping device based on electrostatic zipping of the diaphragm to a chamber surface.…”

Section: Introductionmentioning

confidence: 99%