0

Full Content is available to subscribers

Subscribe/Learn More  >

Dynamic Modeling of Refrigeration Cycle for Electronics Cooling

[+] Author Affiliations
Tiejun Zhang, Juan Catano, Rongliang Zhou, John T. Wen

Rensselaer Polytechnic Institute, Troy, NY

Paper No. IMECE2008-69047, pp. 1587-1596; 10 pages
doi:10.1115/IMECE2008-69047
From:
  • ASME 2008 International Mechanical Engineering Congress and Exposition
  • Volume 10: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B, and C
  • Boston, Massachusetts, USA, October 31–November 6, 2008
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4871-5 | eISBN: 978-0-7918-3840-2
  • Copyright © 2008 by ASME

abstract

In this paper a refrigeration cycle consisting of multiple evaporators, liquid accumulator, compressor, condenser and expansion valves is analyzed. In the cycle the evaporators and condenser are treated as dynamic components while the liquid accumulator, compressor and the expansion valve are consider static components. For the dynamic components, equations for conservation of mass, energy and momentum are used to characterize the comprehensive transient behaviors. One of the differences with previous models is the use of the momentum equation which is typically neglected in traditional vapor compression refrigeration systems, but it is important in electronics cooling where microchannels are commonly used and a significant pressure drop is observed in the evaporator. This model is expected to have higher accuracy than previously used lumped parameter approximation while maintaining its simplicity to be useful for control purposes. The compressor and expansion valves are modeled using empirical relations, the accumulator is used to guarantee proper operation of the compressor. Local system stability is analyzed using a linearized model at some operating condition and an experimental testbed is developed to validate the model. The test bed consists of three electrically controlled heaters immersed in the refrigeration loop which act as the evaporators. A heated tank as an accumulator for operation at wide range of operating conditions, including low quality at the evaporator outlets. A reciprocating compressor with variable frequency drive to operate at various mass flow rates. The condenser is a flat plate heat exchanger and finally three electronically controlled expansion valves for evaporators.

Copyright © 2008 by ASME

Figures

Tables

Interactive Graphics

Video

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

NOTE:
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