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IIR document

Speed of sound measurements of HFO-1234ze(E) in the liquid phase.

• Author(s) : GAO L., ASOU H., HONDA T.
• Publication date: 2015/08/16
• Languages : English
• Source: Proceedings of the 24th IIR International Congress of Refrigeration: Yokohama, Japan, August 16-22, 2015.
• Formats : PDF

IIR document

Compressed liquid speed of sound measurements of cis-1,3,3,3-tetrafluoroprop-1-ene (R1234ze(Z)).

• Author(s) : LAGO S., GIULIANO ALBO P. A., BROWN J. S.
• Publication date: 2016/05
• Languages : English
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 65
• Formats : PDF

IIR document

Speed of sound measurement for R-1336mzz(Z) and R-1233zd(E) in the liquid phase.

• Author(s) : NISHIYAMA T., KURANARI T., GAO L., HIGASHI Y., AKASAKA R.
• Publication date: 2021/06
• Languages : English
• Source: 2^nd IIR Conference on HFO Refrigerants and Low GWP Blends
• Formats : PDF

IIR document

Gaseous speed of sound and virial coefficients for 2,3,3,3-tetrafluoropropene (R1234yf) + 1,1,1,2-tetrafluoroethane (R134a) binary mixture.

• Author(s) : PENG X., XU L., LI J., YANG Z., DUAN Y.
• Publication date: 2023/10
• Languages : English
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 154
• Formats : PDF

IIR document

Experimental speed of sound for cis-1,3,3,3-tetrafluoropropene (R1234ze(Z)) and hexafluoropropene (R1216) in gaseous phase.

• Author(s) : PENG X., XU L., YANG Z., DUAN Y.
• Publication date: 2023/01
• Languages : English
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 145
• Formats : PDF

IIR document

Thermodynamic properties of cis-1-chloro-2,3,3,3-tetrafluoro-1-propene [R-1224yd(Z)]: Experimental measurements of the density and speed of sound and modeling with the Patel–Teja equation of state.

• Author(s) : LAGO S., GIULIANO ALBO P. A., AKASAKA R., ROMEO R.
• Publication date: 2023/11
• Languages : English
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 155
• Formats : PDF

IIR document

Dipole moment and heat capacity in the ideal gas state derived from relative permittivity and speed of sound measurements for HFO-1123 and HCFO-1224yd(Z).

• Author(s) : KANO Y., KAYUKAWA Y., FUJITA Y.
• Publication date: 2020/10
• Languages : English
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 118
• Formats : PDF

IIR document

Compressed liquid density and speed of sound measurements and correlation of the binary mixture {carbon dioxide (CO₂) + 1,1-difluoroethene (R1132a)} at temperatures from 220 K to 350 K.

• Author(s) : MENEGAZZO D., ROWANE A. J., FEDELE L., BOBBO S., LOMBARDO G., MCLINDEN M. O.
• Publication date: 2023/08/21
• Languages : English
• Source: Proceedings of the 26^th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
• Formats : PDF

Supersonic axial compressor stage simplified analysis.

• Author(s) : GALERKIN Y. B., SOLDATOVA K. V.
• Publication date: 2014/07/14
• Languages : English
• Source: 2014 Purdue Conferences. 22nd International Compressor Engineering Conference at Purdue.
• Formats : PDF

IIR document

Turbulence modeling of a single-phase R134a supersonic ejector. 1. Numerical benchmark.

• Author(s) : CROQUER S., PONCET S., AIDOUN Z.
• Publication date: 2016/01
• Languages : English
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 61
• Formats : PDF

IIR document

Speed of sound in gaseous cis-1,3,3,3-tetrafluoropropene (R1234ze(Z)) between 307?K and 420?K.

• Author(s) : LOZANO-MARTIN D., MADONNA RIPA D., GAVIOSO R. M.
• Publication date: 2019/04
• Languages : English
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 100
• Formats : PDF

IIR document

Turbulence modeling of a single-phase R134a supersonic ejector. 2. Local flow structure and exergy analysis.

• Author(s) : CROQUER S., PONCET S., AIDOUN Z.
• Publication date: 2016/01
• Languages : English
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 61
• Formats : PDF

IIR document

Performance analysis of a supersonic ejector cycle working with R245fa.

• Author(s) : MAZZELLI F., MILAZZO A.
• Publication date: 2015/01
• Languages : English
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 49
• Formats : PDF

IIR document

Speed of sound and dielectric constant measurements for a mixture of HFO-1123 and R-32 in the gas phase.

• Author(s) : KANO Y., KAYUKAWA Y., FUJITA Y.
• Publication date: 2018/09
• Languages : English
• Source: 1^st IIR international conference on the application of HFO refrigerants, Birmingham, September 2-5 2018.
• Formats : PDF

IIR document

Speed of sound and dielectric constant measurements for a mixture of HFO-1123 and R-32 in the gas phase.

• Author(s) : KANO Y., KAYUKAWA Y., FUJITA Y.
• Publication date: 2018/09
• Languages : English
• Source: 1^st IIR international conference on the application of HFO refrigerants, Birmingham, September 2-5 2018.
• Formats : PDF

Novel catalysts to address overheating in hypersonic aircraft

Researchers at Australia's RMIT University have developed 3D-printed catalysts to address the challenge of overheating in hypersonic aircraft and possibly other industrial...

• Publication date : 2021/10/22
• Subjects: Technology

Energy savings in a milk plant through permanent magnet speed motors (en français)

A Belgian milk plant reduces by 18 to 21% the necessary energy for cooling through permanent magnet speed motors. (en français)

• Publication date : 2016/09/09

Cryopreservation techniques in reproductive medicine: improving cell survival after warming

A recent literature review presents the technical progress in cryopreservation techniques. The vitrification concept is presented as crucial to ensure cell survival after cryopreservation. 

• Publication date : 2020/11/27

World air-conditioning market in 2019

Despite a decline of -0.8% in sales globally, many markets performed well in 2019. Inverter technology and smart air conditioners are steadily gaining ground globally while sales of R32 systems are increasing...

• Publication date : 2020/03/01
• Subjects: Figures, economy

A must-read in the IJR: a review of storage temperatures for biological material

To improve storage efficiency, the authors of a review article take stock of storage temperatures for biological material (cells, proteins, DNA, etc).

• Publication date : 2024/04/26
• Subjects: Technology

China to enforce a more stringent energy efficiency standard for air conditioners

A new standard, which will come into effect on July 1, 2020, increases the minimum energy efficiency values of room air conditioners, resulting in the elimination of the least efficient air conditioners, i.e....

• Publication date : 2020/04/05
• Subjects: Regulation

Noise reduction strategies for screw compressors

The operating noise of twin-screw compressors is an important issue that may limit their scope of application. Two recent IJR papers suggest several noise reduction methods and analyse their...

• Publication date : 2021/05/31

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.

• Publication date : 2020/02/05

Market assessment and updates of Rwanda’s national cooling strategy

In Rwanda, the purchase of household refrigerators and ACs is increasing with economic growth. As part of the national cooling strategy, the country has launched a public awareness campaign on efficient cooling...

• Publication date : 2021/03/29
• Subjects: Developing country, Environment

Newly revised efficiency standards for ACs in Brazil and India

Stringent minimum energy performance standards (MEPS) for air-conditioning (AC) equipment contribute to cutting down the energy demand for ACs globally. Setting up and periodically revising energy efficiency...

• Publication date : 2020/10/22
• Subjects: Regulation, Developing country

Efficient cooling methods to reduce heat stress in pigs

Microclimate parameters such as air temperature and humidity are important indicators of animal welfare. Besides, heat stress is more detrimental to productivity in the swine...

• Publication date : 2020/10/22
• Subjects: Technology

Is super-cooling better than chilling for seafood products?

Super-cooled storage is a novel technique that better preserves the texture and freshness of fish and extends shelf life compared to chilling. 

• Publication date : 2024/02/29
• Subjects: Technology

Is this the final run in the quest for the Higgs Boson?

In March 2012, physicists from Fermilab’s Tevatron collider near Chicago announced that data collected could suggest the existence of the Higgs boson. Furthermore, the results coincide with the Large Hadron Collider (LHC) results released by CERN...

• Publication date : 2012/05/23

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).

• Publication date : 2022/04/04
• Subjects: HFCs alternatives

Defining energy efficiency indicators for refrigerated shipping vessels

A working group from the International Maritime Organisation (IMO) has proposed new energy efficiency indicators for ships. Shipping companies challenge their...

• Publication date : 2021/07/26
• Subjects: Environment

Heat pumps, the central theme of the recent IIR Congress

An overview of the research carried out in the field of heat pumps, with the aim of achieving greater flexibility and increased energy efficiency, in particular through to the use of thermal energy...

• Publication date : 2023/10/24

Member news: Daikin introduces EWYS-4Z: High-Efficiency Cooling and Heating Solution for Industrial and Commercial Needs

The polyvalent EWYS-4Z cooling and heating unit, which runs on R513A, is designed for superior energy efficiency and reduced noise for industrial and commercial applications. 

• Publication date : 2024/08/01

SophiA project: HKA Lab test progress

SophiA HKA (Karlsruhe University of Applied Sciences) Lab test is intended to provide a better understanding of the cooling system in in different climate zones.

• Publication date : 2023/10/27

Call for abstracts: IIR Compressors Conference 2020

Set to celebrate its 10th anniversary edition in the series, the IIR next Conference on Compressors and Refrigerants has launched a call for abstracts. Don't miss the deadline!

• Publication date : 2019/11/04

Member news: Presenting MIRAI Intex's Latest process cooling Innovation - X Cryo

Discover the latest advancement in process cooling technology from MIRAI Intex. X Cryo delivers precision and durability, meeting the needs of demanding industrial applications. 

• Publication date : 2024/03/27

Technical visit to the Tokyo fish market

At the ICCC conference last June, attendees had the opportunity to participate in technical visits, including a tour of the Tokyo fish market. Alain Le Bail, President of IIR Commission C2, joined the visit and...

• Publication date : 2024/11/15

Cryogenics in the pharmaceutical industry: drug design and bioavailability improvement

Research activities in the pharmaceutical sector focus primarily on developing novel drug formulations which can elicit the desired response upon being administered to the patient...

• Last update : 2023/03/10
• Langues : French, English
• Themes : Freeze-drying in biology and medicine, Cryobiology, cryomedicine: general information

Cryogenic nitrogen in the food and beverage industry

The adoption of cryogenic processes in the food and beverage industry is predominantly driven by liquid nitrogen (LIN), and it is the preferred candidate for food chilling and...

• Last update : 2023/11/07
• Langues : French, English
• Themes : Freezing of foodstuffs

Additive manufacturing of regenerators for caloric cooling

In many areas of engineering, additive manufacturing allows the production of complex and multifunctional products that could not be manufactured using traditional methods. In the...

• Last update : 2022/09/16
• Langues : French, English
• Themes : Caloric cooling (magnetocaloric, electrocaloric, elastocaloric and barocaloric cooling)

Additive manufacturing of heat exchangers

In the refrigeration industry, additive manufacturing (colloquially referred to as “3D printing”) makes it possible to fabricate novel, complex and potentially more energy efficient...

• Last update : 2022/09/07
• Langues : French, English
• Themes : Evaporators, condensers and other heat exchangers