This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Testing of an R134a Spray Evaporative Heat Sink
Technical Paper
2008-01-2165
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The NASA Glenn Research Center has been developing a spacecraft open loop spray evaporative heat sink for use in pressure environments near sea-level, where evaporative cooling of water is not effective. The working fluid is R134a, a common refrigerant used in household appliances, considered safe and non-toxic for humans. The concept uses an open loop spray of R134a impinging on a heated flat plate, through which a closed loop of hot coolant flows, having acquired the heat from spacecraft electronics boxes, the cabin heat exchanger, and other heat sources. The latent heat of evaporation cools the outside of the hot plate, and through heat conduction, reduces the temperature of the coolant. The testing at NASA Glenn has used an electrically heated cylindrical copper target to simulate the hot plate. This paper will discuss the R134a feed system, the test matrix, and test results.
Recommended Content
Authors
Citation
Althausen, D. and Golliher, E., "Testing of an R134a Spray Evaporative Heat Sink," SAE Technical Paper 2008-01-2165, 2008, https://doi.org/10.4271/2008-01-2165.Also In
References
- National Aeronautics and Space Administration “Exploration Systems Architecture Study (ESAS)” NASA-TM-2005-214062 November 2005 309 342
- Golliher E. “Development of the Compact Flash Evaporator System for Exploration” SAE ICES 2007
- Stuart Nelson J. Thomas E. Milner Lars O. Svaasand “Apparatus and Method for Dynamic Cooling or Biological Tissues for Thermal Mediated Surgery” U.S. Patent # 5814040 1998
- Hsieh Shou-Shing Fan Tsung-Cheng Tsai Huang-Hsui “Spray cooling characteristics of water and R134a. Part I: nucleate boiling” International Journal of Heat and Mass Transfer 47 5703 5712 2004
- Hsieh Shou-Shing Fan Tsung-Cheng Tsai Huang-Hsui “Spray cooling characteristics of water and R134a. Part II: transient cooling” International Journal of Heat and Mass Transfer 47 5713 5724 2004
- Hsieh Shou-Shing Tsai Huang-Hsui “R134a spray dynamics and impingement cooling in the non-boiling regime” International Journal of Heat and Mass Transfer 50 502 512 2006
- Ghodbane M. Holman J.P. “Experimental Study of Spray Cooling with Freon-113” International Journal of Heat and Mass Transfer 14 4 5 1163 1174
- Arthur H. Lefebvre Atomization and Sprays , Taylor and Francis 1989
- Rasband W. S. ImageJ U. S. National Institutes of Health Bethesda, Maryland
- NIST Reference Fluid Thermodyamic and Transport Properties Database (REFPROP): Version 8.0
- Calm J.M. Hourahan G.C. “Refrigerant Data Summary” Engineered Systems 18 11 74 88 November 2001