Researchers must look beyond nonflammable chemicals
April 3, 2017
NIST’s study, entitled “Limited options for low-global warming potential [GWP] refrigerants,” focused on residential and small-commercial single-package and split air conditioning systems, but the authors said their conclusions also generally apply to room air conditioning units and other refrigeration and heat-pump systems currently using common, ozone-depleting refrigerants such as R-410A or R-22, which are still used in some developing countries today. “The takeaway is there is no perfect, easy replacement for current refrigerants,” NIST chemical engineer Mark McLinden said.
Company’s position includes approvals for HC and HFO refrigerants
March 1, 2017
In follow-up to the document that Tecumseh issued in January 2016 regarding recommended refrigerants, the company says it is making the required changes to its compressors and condensing units in order to meet the performance, reliability and safety requirements for use with alternatives to R-404A and R-134a refrigerants.
ASHRAE, with the consensus of the American National Standards Institute (ANSI), has designated Bluon Energy’s TdX 20 refrigerant as an approved standard to refrigerant blends under Standard 34-2013. TdX 20 has been given the designation of R-458A.
RS-45 said to be a true drop-in replacement for R-22
September 7, 2016
ComStar International Inc. has announced a new refrigerant for ice rink managers to comply with the phaseout of R-22 refrigerant. The company said its replacement refrigerant is for use in flooded liquid overfeed ice rink systems and does not require changing components or oil.
As hydrofluoroolefins (HFOs), hydrocarbons (HCs), and natural refrigerants are set to replace HFCs, their often-overlooked partners — lubricants — are rarely mentioned. As the industry prepares to adhere to mandated refrigerant transitions, a common question is: “Can I use my old lubricants with new refrigerants?”
TdX 20 is a multi-phase, zeotrope refrigerant blend
June 13, 2016
Refrigerant manufacturer Bluon Energy announced that its TdX 20 refrigerant was given the preliminary ASHRAE number of R-458A with an A1 safety rating. The final approval and assignment of the ASHRAE classification is anticipated by the end of June 2016.
Finding R-22 and R-410A alternatives for high-ambient-temperature environments
March 7, 2016
The Oak Ridge National Laboratory (ORNL) High-Ambient-Temperature Evaluation Program for low-global warming potential (GWP) refrigerants aims to develop an understanding of the performance of low-GWP alternative refrigerants to HCFC and HFC refrigerants in mini-split air conditioners under high-ambient-temperature conditions.