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Frederick Schwartz MS Graduate Student Room/Office: 1335 Email: fschwartz@wisc

Frederick Schwartz MS Graduate Student Room/Office: 1335 Email: fschwartz@wisc.edu From: Fort Atkinson, WI Undergraduate: ME, UW-Platteville ‘08. Thesis: Development of Predictive Correlations for Thermal-Fluid Behavior of Mixed Refrigerants (ASHRAE Project 1602). Experimental Significance.

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Frederick Schwartz MS Graduate Student Room/Office: 1335 Email: fschwartz@wisc

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  1. Frederick Schwartz MS Graduate Student Room/Office: 1335 Email: fschwartz@wisc.edu From: Fort Atkinson, WI Undergraduate: ME, UW-Platteville ‘08 Thesis: Development of Predictive Correlations for Thermal-Fluid Behavior of Mixed Refrigerants (ASHRAE Project 1602)

  2. Experimental Significance • Mixed refrigerants have a thermodynamic advantage when compared to pure fluids for Joule-Thompson refrigeration cycles • Accurate prediction of thermal-fluid behavior is critical to design of cryogenic systems • No practical correlations currently exist for thermal-fluid behavior of mixed refrigerants at cryogenic temperatures for use in equipment design

  3. Test Facility Design ASHRAE Testing Requirements: • Six Refrigerant Concentrations • R14 (35% ), R23 (15% ), R32 (15% ), and R134a (35% ) • Diluted with Argon (0%, 20%, 40%) • Methane (45%) , Ethane (35%) , and Propane (20%) • Diluted with Nitrogen (0%, 20%, 40%) • Mass flux: 250 kg/m2-s • Heat flux: 10 kW/m2 • Temperatures: 150 K to room temperature • Pressures: 100kPa, 1000 kPa • Tube diameters: 0.5, 1.5, & 3.0 mm • Minimize convection and radiation heat transfer around test section Test Section Tout Tin Twall gas mixture

  4. Research Objectives • Obtain thermal-fluid behavior data from the ASHRAE specified test conditions using the test facility developed for this project • Develop predictive, semi-empirical correlations for use in refrigeration equipment design

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