The Natural Refrigeration Review is a quarterly publication that contains technical articles, regulatory and code updates, industry news and information about IIAR activities and publications. It is distributed by email to all IIAR Members and IIAR Contact lists.
SUMMER 2026 THE NATURAL REFRIGERATION REVIEW
The Natural Refrigeration Review issues are available as PDF downloads for both lIAR members and non-members, or as individual article posts below. Click the button to view the full issue, or scroll through all the individual issue articles below.
Thermosyphon Oil Coolers
Thermosyphon oil coolers for compressors have been designed in several ways. It has been a common design for the oil to be circulated through the “shell side” of a shell and tube heat exchanger, while ammonia is circulated through the tube side.
Read MoreIIAR Remembers
Donal Ballou was enthusiastic about everything he did in life, whether as a founding member and chairman of the IIAR, or with the company he created, Refrigeration Systems Corp.
Read MoreDEVELOPMENT AND VALIDATION OF A BENCH TEST PROCEDURE FOR POST MORTEM TESTING OF RELIEF VALVES
In 2007, IIAR revised its recommended practice for replacing pressure relief valves on industrial ammonia refrigeration systems (Section 6.6.3 of Bulletin 110). In addition to the prescriptive five-year relief valve replacement interval, the revisions to Bulletin 110 added an alternative replacement method based on an evaluation of in-service relief valve life using appropriate testing and data analysis methods.
Read MoreChairman’s Message
Now that the IIAR conference, with its committee meetings, networking events and technical discussions has ended and we’re all back at work, it’s time to set some new goals and carry the momentum of our recent meeting into the rest of the year.
Read MorePresident’s Mesage by Dave Rule
There’s a lot going on these days, both in our industry and at IIAR’s headquarters. Regulatory issues have seen an increased focus for our organization while new technologies like low charge systems continue to grow in importance.
Read MoreIAR Shatters Attendance Records, Sets New Goals at Conference
The International Institute of Ammonia Refrigeration hit record attendance numbers, signed agreements with ASHRAE and RETA and drew participation from the Department of Homeland Security at its Conference & Heavy Equipment Show, an event that marked a variety of transitions and new initiatives for the association this year.
Read MorePlace Your Bets
Refrigeration technologies like synthetic replacements for HFCs, low charge ammonia and CO2 -based systems are growing like never before ahead of a planned phaseout of R-22 in the United States.
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IIAR Builds Coalition to Comment on Proposed PSM Changes
The Obama Administration continues its work under the Executive Order entitled: Improving Chemical Facility Safety and Security that was signed in August 2013.
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Learning a Valuable Lesson About Experience
We can all learn some valuable lessons from other people’s challenging experiences, and those lessons are even more important when they help others prevent future accidents.
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Look to Set Points to Boost Efficiency
In a large facility, it goes without saying that increasing overall efficiency will save large amounts of money every year in operating cost. But that savings is often dependant on implementing, and following up on, several best practices in myriad different places throughout a system.
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Brazil Event Highlights New Technologies
A group of Brazilian associations including ASHRAE’s Brazil Chapter, ABRAVA, ASBRAV and ANPRAC held a seminar on industrial and commercial refrigeration in the city of Porto Alegre, Brazil, April 2-3.
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Developing Guidelines for Smaller Facilities
The ammonia refrigeration industry continues to experience an increase in enforcement activities that utilize OSHA’s General Duty Clause, specifically in facilities with less than 10,000 pounds of ammonia, where OSHA expects process safety-like standards to be in place.
Read MoreDeep Cleaning Evaporator Coils Reduces Energy Costs and Eliminates Contamination Risks
When evaporator coil surfaces become coated with foreign particles, dust, dirt, pollen, bacteria, and mold, the ability to transfer heat is greatly reduced. Coils with a layer of dust the thickness of a dime lose up to 21 percent in effi ciency.
Read MoreR22 PHASEOUT: CHALLENGES AND OPPORTUNITIES
The phasing down of R22 production is well underway and operators are now looking for guidance on what options are available for replacing R22 in their existing systems. A wide range of ‘drop in’ refrigerant options are available to retrofit existing systems, typically consisting of blends of hydrofluorocarbons, or HFCs.
Read MoreIIAR CO2 Committee Releases Handbook
One of the primary missions of the International Institute of Ammonia Refrigeration is to offer constructive tools and education that will assist members. In July, IIAR’s CO2 Committee embarked on the comprehensive task of revising the CO2 handbook that debuted four years ago. The new edition is scheduled to be released at IIAR’s annual conference.
Read MoreChairman’s Message by Bob Port
The IIAR 2014 Conference and Heavy Equipment Show in Nashville is just around the corner, and that means my term as Chairman is almost over. Although the past year has fl own by, we’ve reached many of our biggest objectives, and we expect to continue< building on that success in 2014.
Read MorePresident’s Message by Dave Rule
The beginning of the year has been a busy time at IIAR headquarters as we prepare for our Heavy Equipment show in Nashville. As usual, we’re looking forward to showcasing the best our industry has to offer.
Read MoreIIAR Technical Program Highlights Industry Issues
The idea formed in Ron Worley’s mind six years ago when he began auditing ammonia refrigeration systems at Nestlé, where he was a manager of refrigeration engineering before his retirement.
Read MoreAstronauts Brave Spacewalk to Fix Ammonia Control Valve
The words ammonia and astronaut have been linked recently by more than their proximity in the encyclopedia. Last December, astronauts aboard the International Space Station embarked on a pair of dangerous spacewalks to replace a failed ammonia pump module outside the orbital laboratory.
Read MoreNH3 Around the WORLD
Ammonia refrigeration is emerging as a dominant market in many important world economies as governments move to re-energize the Montreal protocol to phase-down greenhouse gasses.
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