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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Has anyone modeled a carbon dioxide (R744) heat pump or refrigeration system?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Please let me know if you have performance data that you are willing to share (such as for Type919 or Type927). Although commercial products are available (mostly in Europe and Asia) I have not been able to find any manufacturer data for CO2 equipment.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Thanks,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Ben Heymer, Energy Engineer<o:p></o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Energy Center of Wisconsin</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'> | <b>Madison.Chicago.Minneapolis<o:p></o:p></b></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>608.210.7168 | Mobile: 312.315.4783 | <a href="http://www.ecw.org/" title="Energy Center Home Page"><span style='color:black;text-decoration:none'>www.ecw.org</span></a><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>