Interest in so-called natural refrigerants continues to grow, especially when it comes to the refrigeration of food. Here are some examples that illustrate how companies are using natural refrigerants to keep food cold and fresh.

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While my last series of columns explored liquid subcooling in a refrigeration system, this article will compare subcooling amounts in a refrigeration system incorporating an overcharge of refrigerant, a dirty condenser, and air in the system.

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Technicians should make safety a first priority when working on any refrigeration system. There are many potential hazards associated with installing, servicing, and maintaining these systems. One of these potential hazards is the refrigerant within the system.

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Fresh on the heels of the announcement of an almost 50 percent reduction in supplies of virgin HCFC-22, the supermarket industry is reacting. What are they focusing on now? 

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It is great to enter the industry as a refrigeration service technician (or any HVACR tech for that matter) with a good amount of education attained through high school, community college, vocational school, or even a four-year program. But is that enough?

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There are many reasons for wanting to stop refrigerant leaks in HVAC mechanical equipment. Some of the most obvious are partial or total loss of cooling capacity, decrease in efficiency, system damage, costly repairs and cleanup, etc. The list goes on and on.

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Apache Junction, Ariz., is one of the harshest and hottest climates in the United States. Last winter Burke Alford, maintenance manager for the Safeway supermarkets, was faced with the dilemma of replacing another evaporative condenser. The company decided to consider a new hybrid condenser technology.

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The Air-Conditioning, Heating and Refrigeration Technology Institute (AHRTI) has completed a research project on performance standards for walk-in refrigerator and freezer systems.

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Some developments are altering European supermarket refrigeration. The three case studies here illustrate some of these changes.

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My Point of View in the April FROSTlines was about a movie called “Inuk” that was shown at the Beloit International Film Festival. Now, I suppose I should mention another movie (one of four we saw at that same festival) — one completely different from “Inuk” but one that had a refrigeration aspect.

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In this 35-minute video presentation, well-known author and instructor Jim Johnson shows appliance and HVACR technicians what they need to know about the EPA Section 608 Universal Refrigerant Recovery Certification Exam.

 

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Copper tube and fittings are core components of most air conditioning and refrigeration systems. With newer refrigerants operating at pressures more than 50% above R22 and R404A, contractors and engineers alike should understand the real science behind how copper piping is designed to meet the demands of modern HVACR applications. Read More