The substantial material stream, and energy consumption, associated with the cooling of desktop computers, servers, routers, and power electronic modules contribute significantly to the depletion of key resources. To reduce this severe environmental impact, while meeting the thermal management requirements of these components and systems, it is essential that a minimum energy, design-for-manufacturability approach be followed in the design and commercialization of such air-cooled heat sinks. In this paper, a design-for-manufacturability methodology (DFM) is combined with a least-energy optimization methodology, using the total Coefficient of Performance (COPT), to identify practical low energy designs and existing gaps in manufacturing capability that prevent the attainment of the ideal minimum energy solutions. The COPT methodology relates the heat sink cooling capability to the invested fan pumping work and the thermodynamic work required to manufacture and assemble the heat sink and seeks to maximize the thermal energy that can be extracted from a specified space, while minimizing the material and energy consumed in the fabrication and operation of the specified heat sink. This combined methodology was applied to aluminum, copper, and magnesium as potential heat sink materials for a fixed input work of 20 kWh, and for three different duty cycles, namely, sporadic (1500 h), periodic (6000 h), and continuous (26208 h), respectively. The results presented herein, are derived for heat sinks on a 10 cm by 10 cm isothermal base, and 5 cm fin height, operating at an excess temperature of 25 K relative to the inlet air. The thermo-fluid analysis of the forced convection rectangular plate-fin array has been carried out using a well-validated semi-analytical model. The energy-optimal aluminum, copper and magnesium designs are compared to draw quantitative and qualitative conclusions.
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ASME 2009 InterPACK Conference collocated with the ASME 2009 Summer Heat Transfer Conference and the ASME 2009 3rd International Conference on Energy Sustainability
July 19–23, 2009
San Francisco, California, USA
Conference Sponsors:
- Electronic and Photonic Packaging Division
ISBN:
978-0-7918-4360-4
PROCEEDINGS PAPER
Minimum Energy Design for Manufacturability of Air Cooled Heat Sinks
Madhusudan Iyengar,
Madhusudan Iyengar
IBM Corp., Poughkeepsie, NY
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Avram Bar-Cohen
Avram Bar-Cohen
University of Maryland, College Park, MD
Search for other works by this author on:
Madhusudan Iyengar
IBM Corp., Poughkeepsie, NY
Avram Bar-Cohen
University of Maryland, College Park, MD
Paper No:
InterPACK2009-89093, pp. 319-326; 8 pages
Published Online:
December 24, 2010
Citation
Iyengar, M, & Bar-Cohen, A. "Minimum Energy Design for Manufacturability of Air Cooled Heat Sinks." Proceedings of the ASME 2009 InterPACK Conference collocated with the ASME 2009 Summer Heat Transfer Conference and the ASME 2009 3rd International Conference on Energy Sustainability. ASME 2009 InterPACK Conference, Volume 2. San Francisco, California, USA. July 19–23, 2009. pp. 319-326. ASME. https://doi.org/10.1115/InterPACK2009-89093
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