Full Content is available to subscribers

Subscribe/Learn More  >

Development of an Electrohydrodynamic (EHD) Micro Pump for LN2 Spot Cooling

[+] Author Affiliations
Y. Zhao, J. Lawler

Advanced Thermal and Environmental Concepts, Inc., College Park, MD

P. Foroughi, M. Ohadi

University of Maryland, College Park, MD

Paper No. IMECE2003-55625, pp. 113-118; 6 pages
  • ASME 2003 International Mechanical Engineering Congress and Exposition
  • Process Industries
  • Washington, DC, USA, November 15–21, 2003
  • Conference Sponsors: Process Industries Division
  • ISBN: 0-7918-3725-4 | eISBN: 0-7918-4663-6, 0-7918-4664-4, 0-7918-4665-2
  • Copyright © 2003 by ASME


Cryogenic cooling systems play increasingly important roles in both military and commercial applications. These systems are essential for the operation of superconducting electronics and sensors. The development of innovative cryogenic cooling solutions to replace the traditionally bulky, complicated, and less efficient devices that rely solely on heat conduction is becoming more and more attractive. Spot cooling is a novel concept for cryogenic cooling systems. However, spot cooling devices require a compact, efficient and reliable pump that can pump cryogenic fluids. This paper presents preliminary efforts on developing a micro pumps for cryogenic cooling of certain specialty electronics, including those of sensor and detector applications. A packaging method compatible with cryogenic applications is proposed. The tested micro pump, fabricated by MEMS techniques, had a saw-tooth emitter and planar collector with 50-μm electrode spacing and 200-μm pair spacing. The pump was tested in sub cooled liquid nitrogen (with about 7 K sub cooling). It was shown by the experimental tests that liquid nitrogen is pumped by the EHD effects if the electrodes of the pumps are properly designed. The tested micro pump pumped liquid nitrogen at a flow rate of 2.3 g/min and had an output pumping head of 5 Pa when 1000 volts were applied across the electrodes.

Copyright © 2003 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In