Professional Development Hour - Refrigeration 101

Join CaptiveAire for a professional development hour (PDH) about the basics of the refrigeration cycle, including discussions on the properties of refrigerants and varying P-H charts, defining subcool and superheat using the P-H chart, and the energy implications of modulating equipment and how to define the energy efficiency ratio (EER) and the coefficient of performance (COP). This video is helpful for anyone in the HVAC industry, especially HVAC engineers and consultants, or anyone who wants to learn more about the inner workings of HVAC units. Learn more about CaptiveAire at captiveaire.com. To receive PDH certification for this video, please visit CaptiveAire.com/library and click Request Access under the Professional Development section. Fill out the form on the pop up that appears and click Send. CaptiveAire will then add you to a professional development portal where you can access a certificate to confirm your training. 0:00 Introduction 1:52 Part 1 - The Process 2:53 Constant phase heat exchange 7:20 Variable phase heat exchange 10:32 Part 2 - Refrigerants 11:35 The Pressure-Enthalpy (PH) chart 12:44 Pressure and temperature relationships 15:06 Part 3 - The Refrigerant Journey 15:11 Compression 17:26 Condensation 18:40 Subcool 21:09 Expansion 25:18 Types of expansion devices 23:26 Evaporation 24:26 Superheat 27:30 Part 4 - Efficiency 27:40 The PH chart and efficiency 29:48 Calculating Coefficient of Performance (COP) 34:06 Energy Efficiency Ratio (EER) 32:13 Thought experiment, the open refrigerator 34:54 Efficiency hurdles 36:15 Scroll compressors 37:06 Inverters and variable frequency 37:56 Part 5 - Modulation 38:00 System balance in constant speed systems 39:30 System balance in modulating systems 41:11 Software and Controls 42:56 Conclusion - The Future of Refrigeration