Refrigeration

Converting Constant to Variable Volume

Variable-Volume Conversion Can Offer Significant Energy Savings
By Ryan Rex
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Converting a constant-volume RTU to variable volume can save anywhere between 20-50 percent in energy savings if done correctly. 


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Detecting Costly Refrigerant Leaks

Balancing Environmental Responsibilities, Energy Savings, System Resiliency
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Over the course of recent years, the HVACR industry has been focused and made strong progress on developing and advancing refrigeration equipment and systems responsible-use practices.


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Governmental Action on Refrigeration Safety, Regulations

Warehouses, Supermarkets Among Sites Being Watched
By Peter Powell
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Refrigeration service technicians point out the need to keep up to date with what is happening elsewhere that could affect them. So, from time to time, we like to bring readers up to date on some news items related to refrigeration regulatory and safety issues.


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RSC, Freije Announce Merger

New Company Continues Industrial Refrigeration Focus
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Refrigeration System Co. (RSC) of Columbus, Ohio, which provides services for industrial refrigeration, has announced the completion of its merger with Freije Engineered Solutions Co. of Fishers, Ind.


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Krack Sells Industrial Business

Refrigeration Manufacturer to Continue Commercial Focus
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Krack Corp. has announced that it has sold the assets of its industrial business to SGS Refrigeration. SGS will sell the products it has acquired under a new SGS/Krack name in the industrial marketplace.


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A ‘Natural’ Tilt by the EPA?

Where the Feds Seem to Stand on Certain Refrigerants
By Peter Powell
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If you want to get some idea of where the U.S. Environmental Protection Agency (EPA) is leaning when it comes to refrigerants, consider that EPA’s GreenChill program gave a “Best of the Best” award to a store using a transcritical CO2 system.


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Oct. 14, 2013: Commercial Refrigeration Industry Is in the Midst of a Shift

Symposium Notes Increased Regulatory Pressure, Increasing Energy Costs Are Leading to Change
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Danfoss hosted its 20th EnVisioneeringSM Symposium, “The Climate and Energy Nexus in Commercial Refrigeration.” Participants included commercial refrigeration OEMs, supermarket chains, contractors, and more who addressed important issues on the refrigeration and refrigerants agenda.


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The Professor: Diagnosing Bad HVAC Compressor Valves

When Low Head and High Suction Pressures Collide
By John Tomczyk
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Many service technicians experience service calls where the compressor has both a low head pressure and a high suction pressure. Often, the refrigeration equipment is still running, but the product temperature is suffering about 7-10°F.


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Making a Case for New Refrigerants, Technology

Plants, Restaurants, Supermarkets Benefit from Latest Developments
By Peter Powell
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There is so much talk these days about new refrigeration technologies and new refrigerants that it is sometimes difficult for contractors to sort out what’s theoretical and what’s actually up and running in the field. Here’s a snapshot of some of the latest refrigerants being utilized across various projects.


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Ice Breaker: Identifying, Choosing Proper Temp Sensors

There are Differences in this Basic Tool of the Trade
By Joe Marchese
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Not all temperatures sensors are created equal and not all instruments and controllers use the same type of temperature sensors. So the first step in troubleshooting or replacing this type of sensor is to first recognize the type of temperature sensor being used.


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2014 Energy Efficiency Forum

Highlights from the 25th annual Energy Efficiency Forum in Washington, D.C.

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NEWSMakers: Joseph Groh

Joseph Groh, an industry veteran boasting 35 years of HVAC experience, discusses the 2008 bicycle accident that cut his career tragically short, and how the Joseph S. Groh Foundation is his way of giving back to the construction trade. Posted on Aug. 22.

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2014 August 25

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Prohibiting HFCs

EPA is proposing a rule that would prohibit some HFCs in select refrigeration applications. Do you agree with this move?
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