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IIR document
Zeotropic mixtures R1234ze(Z)/acetone and R1234ze(Z)/isohexane as refrigerants in high temperature heat pumps: Influence of the accuracy in thermodynamic properties evaluations.
Empirical models of thermal conductivity of cis-1,3,3,3-tetrafluoropropene (R1234ze(Z)) with measurements using transient hot-wire method.
Viscosity Measurement of cis-1,3,3,3-tetrafluoropropene (R1234ze(Z)) by Tandem Capillary Tubes Method.
Experimental speed of sound for cis-1,3,3,3-tetrafluoropropene (R1234ze(Z)) and hexafluoropropene (R1216) in gaseous phase.
Theoretical investigation and comparative analysis of the Linde–Hampson refrigeration system using eco-friendly zeotropic refrigerants based on R744/R1234ze(Z) for freezing process applications.
Recommended by the IIR / IIR document
An update on the thermophysical properties data available for pure low GWP refrigerants.
Evaluation of proper HFO refrigerant/ionic liquid mixture for absorption refrigeration system.
Low GWP refrigerants R1234ze(E) and R1234ze(Z) for high temperature heat pumps.
Viscosity measurements of R32, R134A and R1234ze(Z).
Surface tension of low GWP refrigerants R1234ze(Z) and R1233zd(E).
Condensation and evaporation of R134a, R1234ze(E) and R1234ze(Z) flow in horizontal microfin tubes at higher temperatures.
A fundamental equation of state for cis-1,3,3,3-tetrafluoropropene (R-1234ze(Z)).
Condensation heat transfer of low GWP refrigerants R1234ze(E), R1234ze(Z) and R1233zd(E) on a horizontal plain tube.
Surface tension of low GWP refrigerants R1243zf, R1234ze(Z), and R1233zd(E).
Review of ultra-low GWP molecules – thermodynamics properties and their characteristics for use in HVAC&R.
Refrigeration sector monitoring
35 results
Launch of the first R1234ze free-cooling chillers
The “first to market” TurboChill free cooling chillers using low global warming potential (GWP) refrigerant R1234ze are going to be launched.
HFO1234ze prototypes finally released
The prototype is said to be suitable for outdoor air-cooled chiller applications
HFO-1234ze news
On January 30, 2011, HFO-1234ze, was accepted for use in foam and aerosol applications by the US EPA. HFO-1234ze (GWP = 6) is already used in Europe and Japan in a variety of foam and aerosol applications.Klima-Therm and...
A low-GWP cooling system for the Eiffel Tower
The ageing R407C cooling system in the tower’s west pillar has been replaced with an energy efficient system using low GWP R1234ze(E).
IPCC confirms HFO GWPs are less than 1
The Intergovernmental Panel on Climate Change (IPCC) has confirmed that both R1234yf and R1234ze(E) have global warming potentials below that of carbon dioxide.
Some HFOs have lower GWPs than CO2
US EPA has evaluated new HFO refrigerants as having similar or lower global warming potential than CO2.
IJR highlights: review of low-GWP alternative refrigerants
In a recent review article based on over 60 published studies and published in the International Journal of Refrigeration, Chinese researchers have compared nearly 40 alternative low-GWP refrigerants in terms of...
State of the art on the flammability of HFOs
An article recently published in the IJR reviews the flammability characteristics of 48 HFOs and blends for various experimental conditions.
Innovative HFO/CO2 cascade for supermarket application
An innovative CO2/R1234ze cascade refrigeration system with heat recovery has been installed into a 1500 m2 sales area supermarket in Parma, Italy.
Household refrigerators: HFO performance as drop-in replacement for R-134a
During the IIR co-sponsored International Refrigeration and Air-conditioning Conference at Purdue in 2012, K.M Karber et al. from Oak Ridge National Laboratory, United States, presented* the results of a performance test on R1234yf and R1234ze,...
Latest news on HFCs alternatives
R470A, R470B, R466: What applications and what features for these new non-flammable refrigerants?
Low GWP blends for domestic air conditioning
A review article presents the latest research trends on low GWP refrigerants, mainly HFC/HFO blends, for domestic air conditioning.
R1234yf as a working fluid in Organic Rankine Cycle systems
A recent review article presented the use of HFO R1234yf and its mixtures in Organic Rankine Cycle (ORC) systems, namely in applications for waste heat recovery from internal...
Alternative low-GWP refrigerants for transport refrigeration.
Summary of a paper presented during the 12th IIR Gustave Lorentzen conference on Natural refrigerant, available in Fridoc.
Commercial refrigeration: marketing of R471A, a new alternative to R404A
Honeywell recently announced the marketing of R471A, a non-flammable refrigerant with a GWP under 150. It is expected to replace R404A in medium temperature commercial refrigeration...
IIR news
3 results
IIR member news: Star Refrigeration
After a year’s research project into low GWP cooling, Star Refrigeration proposes a new chiller using R1234ze.
The Mostra Convegno exhibition
In March 2018 the IIR participated in one of the biggest exhibitions on refrigeration technologies, Mostra Convegno, which took place, as always, in Milan.
Member news: Koura offers an alternative refrigerant to R1234yf for mobile air conditioning
Koura offers a direct replacement solution for R1234yf in mobile air conditioning.
Encyclopedia of Refrigeration
2 results
Global warming potential (GWP) of HFC refrigerants
Using the latest updated data from UNEP’s RTOC 2022 report, we have compiled the 100-year GWP and 20-year GWP values of hydrofluorocarbon-based (HFC) refrigerants. Our table includes...
Hydrocarbon refrigerants
Hydrocarbons such as R290 (propane), R600a (isobutane) or R1270 (propene/propylene) are low GWP non-toxic natural refrigerants with excellent thermodynamic properties. They offer an...
