Recent Additions

• Experimental Study of System Performance Improvements in Transcritical R744 Systems with Applications to Bottle Coolers 

  DeAngelis, J.M.; Hrnjak, P.S. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 2005-03)

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  PDF (4MB)
• Condensation of CO2 at Low Temperatures 

  Jang, J.; Hrnjak, P.S. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 2004-06)

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  PDF (5MB)
• Analysis of design tradeoffs for display case evaporators 

  Chandrasekharan, R.; Bullard, C.W. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 2004-10)

  A model for simulating a display case evaporator under frosting conditions has been developed, using a quasi-steady and finite-volume approach and a Newton-Raphson based solution algorithm. It is capable of simulating ...

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  PDF (2MB)
• An Experimental Investigation of Pressure Drop and Heat Transfer in an In-Tube Condensation System of Ammonia with and Without Miscible Oil in Smooth and Enhanced Tubes 

  Komandiwirya, H.B.; Hrnjak, P.S.; Newell, T.A. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 2005-04)

  Measurements of pressure drop and heat transfer coefficient were taken for smooth and internally enhanced smooth sections. Pure ammonia was used in both smooth and enhanced tubes, whereas ammonia mixed with oil only used ...

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  PDF (2MB)
• Flow and Heat Transfer in Microchannels 30 to 300 Microns in Hydraulic Diameter 

  Tu, X.; Hrnjak, P.S. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 2004-01)

  Fluid flow and heat transfer in microchannels are very important in various fields, including miniature thermal systems, compact heat exchangers and electronics cooling. The purpose of this investigation is to contribute to ...

  application/pdf

  PDF (3MB)