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helical oil separator

The Professor: Helical Oil Separators

January 9, 2012
By John Tomczyk
No Comments
Oil separators are essential on low and ultra-low temperature refrigeration systems and on large air conditioning systems up to 150 tons. Most compressor manufacturers require oil separators on all two-stage compressors.


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AHR Expo Innovation Award

Innovation Awards Recognize Honorable Mentions

January 9, 2012
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In addition to the 10 AHR Expo Innovation Award winners highlighted in this issue, 31 other products have been recognized with honorable mentions in the same 10 product categories. The honorable mentions are listed here.


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Lots of Refrigeration to See

January 9, 2012
By Peter Powell
No Comments
About this time of year, editors and columnists in the HVACR industry do editorials and columns encouraging attendance at the annual International Air-Conditioning, Heating, and Refrigerating Exposition (AHR Expo), this year taking place Jan. 23-25 in Chicago. It’s on the ‘R’ that I want to focus.


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Three Common Ammonia Refrigerant Mistakes and How to Avoid Them

January 9, 2012
By John R. Hall
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Refrigeration contractors know that there are several upsides to ammonia refrigerants. The most common is its compatibility with the environment. Ammonia does not contribute to global warming because it does not deplete the ozone layer. It has thermodynamic qualities that require less electricity in its usage.


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HFCs Stay the Course After Global Meeting

January 9, 2012
By Peter Powell
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The long-term availability of HFCs survived another effort at phase-down during the 23rd Meeting of the Parties (MOP23) to the Montreal Protocol held in November 2011. Participants did not reach agreement on taking any action to control HFCs.


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Devilish to Diagnose

January 9, 2012
By Mike Gray
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Low pumper compressors can be devilish to diagnose properly. None of us wants to replace a compressor that is not bad. With more than 40 years of experience, I want to offer some thoughts.


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Distribution Center Glycol 1

Distribution Center Goes with Glycol

January 9, 2012
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Longo’s Supermarkets needed an environmentally friendly, cost-effective warehouse refrigeration, Neelands Refrigeration Ltd. and Hill Phoenix® had an answer.


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Refrigeration

Ultra Low Temp Refrigeration

January 9, 2012
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Ultra-low temperature systems are used to achieve low temperature baths or boxes for laboratory use, storage of pharmaceutical or biological samples, low temperature manufacturing of metals, or extreme temperature environmental testing.
 


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Basic Thermodynamics

Basic Thermodynamics for Refrigeration and Air Conditioning

January 9, 2012
By Brian J. Dolin
No Comments
Thermodynamics, as with most concepts in science and physics, is most accurately described using mathematical equations. This article is an attempt to simplify these concepts.
 


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Refrigeration

Stores Try Transcritical CO2

December 12, 2011
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Efforts to make CO2 work in transcritical applications got a boost with the announcement the CSC, The Canadian manufacturer of refrigeration systems, will be making a major push in that regard.


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