HVAC - Commercial Refrigeration Part 1

  • Tuesday, November 10, 2020
  • 5:30 PM - 7:00 PM
  • WE&T Webinar



There is a wide variety of commercial refrigeration equipment, from ice machines to supermarket food displays. Many refrigeration systems are old, operate inefficiently and have few if any equipment improvements. With today’s new refrigerants and technologies (such as floating head pressure, liquid sub-cooling and multiplexed compressors), there are many opportunities for improving the efficiency of existing equipment or for implementing new equipment.

This full-day course reviews elementary refrigeration concepts and introduces various energy-efficiency techniques that, when properly applied, can save on energy costs. It addresses the latest refrigerant issues, efficiency measures, equipment options, Title 24 compliance, integrated demand side management, and the benefits presented by these topics. This course is designed for owners and managers of refrigeration systems as well as service professionals.


  • Identify the components of a commercial refrigeration system
  • Describe the differences between conventional and parallel/multiplex refrigeration systems
  • List the factors that affect the heat-transfer efficiency of a condenser
  • Discuss the differences in air-cooled, water-cooled, and evaporative condensers
  • Identify the characteristics that affect the function of the evaporator
  • Discuss the variables to consider when evaluating and selecting a replacement refrigerant.
  • Assess ways to improve the energy efficiency of refrigeration systems.
  • Explain the benefits of subcooling.
  • Describe how floating head pressure and variable speed drives result in energy savings
  • Define the concept of IDSM and describe demand-side management strategies that can be used for commercial refrigeration
  • Identify relevant Title 24 Part 6 code triggers and mandatory measures
  • Identify relevant SDG&E programs that can help save energy and reduce costs


David Wylie is a founding member of ASWB Engineering with 40 years of experience in commercial and industrial building optimization and energy engineering and over 100,000 hours of classroom instruction time. He has developed and managed energy efficiency and technology demonstration projects for utilities, municipalities, commercial clients, and the U.S. Department of Energy. He is best known for his role as a workforce development instructor delivering trainings for PG&E’s Industrial Strength Energy Efficiency Seminar Series, SCE’s Energy Education Centers, and SCE’s Customer Energy Services Department. He is a published author of books and articles on energy efficient technologies and former president of the local chapter of the Southern California Board of Association of Professional Energy Managers (APEM).

Additional Details

Learning level: Intermediate

Four Part Series: be sure to register for each night

Part 1 -  11/10/20 - 5:30pm - 7pm

Part 2 -  11/12/20 - 5:30pm - 7pm

Part 3 -  11/17/20 - 5:30pm - 7pm

Part 4 -  11/19/20 - 5:30pm - 7pm

This course is NATE credited. please have your NATE ID available during each class

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