1. UNEP HFC Workshop Refrigeration Session 1, part 2 OVERVIEW Reinhard Radermacher raderm@umd.edu Bangkok, 20-21 April 2015

2. R404A COP = 2.57, GWP = 3922 CO2* COP = 2.4, GWP = 1 Refrigerant Properties for Refrigeration 118cc 8 cc Flammability 1 2L 3 Comp. displacement volume T evap = -20°C, T cond = 45°C 10K superheat, 5K subcooling Refrigerant properties based on NIST REFPROP 9.1 Mixing parameters have been estimated for some blends * Includes Suction Line HX * CO2 cycle is modeled with suction line HX

3. Total Emissions Comparison 3 From: IIR LCCP Working Party, published IIR Website

4. 2L Refrigerant Flammability Fire Protection Engineering at University of Maryland Research (published 2014 Purdue Refrigeration) The hot plate ignition temperatures of R-32 and R-410A were 764 and 790 °C. For POE and mineral oil these were 645 and 764 °C, while their closed cup ignition temperatures were 445 and 338 °C. Ignition temperatures of refrigerant/oil mixtures were essentially the same as for the oil.