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An Experimental Study on the Pumping Characteristics of Diffuser-Nozzle Based Thermopneumatic Micropumps with Different Input Voltages and Frequencies  

Jeong, Jin (Department of Mechanical Engineering, Kyunghee University)
Chae, Hee-Moon (Department of Mechanical Engineering, Kyunghee University)
Kim, Chang-Nyung (College of Advanced Technology, Kyunghee University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.19, no.9, 2007 , pp. 654-661 More about this Journal
Abstract
This study has been conducted to investigate the pumping characteristics of diffuser-nozzle based thermopneumatic micropumps with different input voltages and frequencies. In this study, the displacements of the membrane have been obtained changing the input voltage and frequency in load-free state because it is very difficult to measure the displacement of the membrane in an actual load state. It has been found that the amplitude of the membrane displacement increases as the input voltage increases. The pressure head of the thermopneumatic micropump increases almost linearly over some range of the input voltage and decreases almost linearly as the frequency increases. Also, the results show that the thermopneumatic micropump can pump the fluid over a certain input voltage. This study can be utilized as basic data for design and evaluation of thermopneumatic micropumps.
Keywords
Thermopneumatic micropump; Diffuser; Nozzle; Membrane; Input voltage; Frequency;
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