Refrigeration

The Professor: A Recap on Oil Traps

Functions, Dealing with Oil Reservoirs
By John Tomczyk
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The function of an oil reservoir, commonly known as an oil trap, is to prevent large oil slugs from forming. This is accomplished by trapping a small amount of oil in the reservoir or trap and gradually returning it to the compressor.


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‘Last-gen’ Refrigerants in Development

Manufacturers Focus on Low-GWP Alternative Refrigerants
By Peter Powell
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Contractors hoping for the final word on the newest refrigerants may not have to wait much longer. 


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Ice Breaker: Advantages of Parallel Compressor Racks

Supermarkets Use Design to Cool Cases
By Joe Marchese
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For maximum efficiency, a bank of compressors should be connected to evaporators operating at similar temperatures. From an operational standpoint, cases of different evaporating temperatures can be connected to the rack; however, this causes a substantial energy loss.


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Aug. 26, 2014: Rebate Service Help Supermarkets Recoup Energy-Efficiency Incentives

‘Supermarkets May Be Leaving a Lot of Money on the Table’
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Supermarkets in the United States can now get expert help in securing energy-efficiency rebates from utilities. The service is for supermarkets that invest in initiatives to improve energy efficiency but may not collect all the utility rebates for which they qualify, said Abtar Singh, chief executive of Singh360.


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AHRI, Lennox Petition Court to Review DOE Walk-in Standard

Industry Leaders Challenge Efficiency Standards for Walk-in Coolers, Freezers
By Jen Anesi
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On Aug. 4, the Air-Conditioning, Heating, and Refrigeration Institute (AHRI) and Lennox Intl. Inc. filed a petition asking the U.S. Court of Appeals for the 5th Circuit to review the U.S. Department of Energy’s (DOE) final rule establishing energy conservation standards for walk-in coolers and freezers (WICF).


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Purdue Conference Draws a Line on HFC Refrigerants

Low-GWP Refrigerants Stressed To Keep Refrigerant in Mix
By Peter Powell
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If hydrofluorocarbons (HFCs) are to have long-term viability, the low-global warming potential (GWP) versions will have to separate themselves from high-GWP types. And the survivors will have to play their part in energy efficiencies, especially in commercial buildings.


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CO2 Refrigerant Growth Continues

Inroads Ongoing in United States
By Peter Powell
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CO2 as a refrigerant has been a part of the refrigeration landscape for close to a decade. The most anticipated next step was running CO2 as a standalone refrigerant in a system, which is being done in Europe in more and larger applications. Finally, the approach crossed the Atlantic.


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Considering a CO2 Refrigeration System

Looking at High Pressure and COP
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This article is the second of a two-part series in response to the question: “Should I choose CO2 (R-744) for my refrigeration system?” It was prepared by engineers with M&M Refrigeration of Federalsburg, Maryland.


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Supporting Evolution of New Refrigerants

Adoption of F-gas Regulation Continues in European Union
By Torben Funder-Kristensen and Lisa Tryson
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This story was prepared by Danfoss and brings readers up to date on developments in Europe concerning HFC refrigerants. While what happens in Europe does not automatically reflect what will happen stateside, it would be wise for contractors in the United States and Canada to monitor developments overseas.


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Handbook Covers Refrigeration

New ASHRAE Publication Includes Updates
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The 2014 ASHRAE Handbook—Refrigeration, which covers refrigeration equipment and systems for applications other than human comfort, is now available for purchase. The 51 chapters include information on cooling, freezing, and storing food; industrial applications of refrigeration; and low-temperature refrigeration.


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NEWSMakers: Rajan Rajendran

Rajan Rajendran, newly appointed director of the Emerson Innovation Center, talks about the new $35 million facility and how it will function on the University of Dayton campus. Posted on Aug. 29.

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