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Refrigeration

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
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
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
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
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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HVACR Industry Wary of R-22 Surplus

R-22 Chugging Along Despite Phasedown

Current inventory of R-22 remains plentiful in the U.S., even as the industry heads toward a total phaseout of the popular refrigerant in 2020.


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The Seven Basic Ice Machine Cleaning Steps

Reliability Benefits from Preventive Maintenance Practices
Developing and sticking to a consistent cleaning process for ice machines not only helps guarantee customers a clean food product time and time again, but it also enables them to reap the most from their investment for many years to come. 


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Five Qualities Fluid Automation Devices Should Possess for Low-Temp Applications

Picking Valves and Other Parts That Can Handle the Harsh Conditions Takes Extra Care
Valves control the flow of compressed air or other fluids, and on cylinders to control motion. But the cold truth is that low temperatures can cause problems for these fluid automation devices all along the line — from selection and delivery to operation and maintenance.


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Purdue Conferences Seek Papers

Concurrent Conferences Set for 2014
The dates are set for next year’s three concurrent HVACR conferences at Purdue University. For authors wishing to present papers at any of the conferences, the abstract submission deadline is Dec. 20, 2013.


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ICOR Provides Information to the Industry Digitally

Superheat/Subcooling Calculator Goes Digital for Mobile
ICOR International has announced some new support services. One is a digital version of its NU-22B superheat/subcooling calculators in a mobile app. ICOR also announced a new and improved corporate website.


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Opening Up Students’ Minds to Their Job Options

Vocations Can Include the Manufacturing Sector as well as the Trades
During the summer, the U.S. congressman representing the district in which I live visited a Danfoss plant where variable frequency drives (VFDs) are manufactured. In a Q&A with the media, the congressman spoke of the need to introduce young people to the value of being part of the manufacturing sector.


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2014 SMACNA Annual Convention

Views from the 2014 SMACNA Annual Convention in San Antonio.

Podcasts

NEWSMakers: Chris Mathis

Chris Mathis, president of Mathis Consulting Co. and vice chair of ASHRAE’s residential ad hoc committee, talks about ASHRAE’s exploration into the residential market. Posted on Oct. 17.

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