Refrigeration in The Real World

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