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IIR document

Influence investigation of friction on supersonic ejector performance.

• Author(s) : ZHANG H., WANG L., JIA L., et al.
• Publication date: 2018/01
• Languages : English
• Keywords : Friction, Roughness, CFD, Surface, Loss, Performance, Ejector, Refrigerant
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 85
• Formats : PDF

Numerical Analysis of Friction Power and Wear of Vane in Rotary Compressor.

• Author(s) : YANG Z., GUO H., JIANG B., et al.
• Publication date: 2018/07/09
• Languages : English
• Keywords : Geometry, Friction, Wear, Modelling, Oil, Rotary compressor
• Source: 2018 Purdue Conferences. 24^th International Compressor Engineering Conference at Purdue.
• Formats : PDF

A numerical friction loss analysis of the journal bearing in a hermetic reciprocating compressor.

• Author(s) : POSCH S., HOPFGARTNER J., HEIMEL M., et al.
• Publication date: 2016/07/11
• Languages : English
• Keywords : Friction, Bearing, Simulation, Loss, Hermetic compressor, Reciprocating compressor
• Source: 2016 Purdue Conferences. 23^rd International Compressor Engineering Conference at Purdue.
• Formats : PDF

Condensate impact on air friction of plate fin-tube heat exchangers.

• Author(s) : YU J.
• Publication date: 2021/05
• Languages : English
• Keywords : Condensate, Air, Friction, Finned tube, Heat exchanger, Velocity (fluids, gases), Expérimentation
• Source: 2021 Purdue Conferences. 18^th International Refrigeration and Air-Conditioning Conference at Purdue.
• Formats : PDF

IIR document

Correlation for thermal conductivity of HFOs and HFO/HFC mixtures based on friction theory.

• Author(s) : JIA H., HU Y., ZHANG Y., WANG X.
• Publication date: 2023/04/05
• Languages : English
• Keywords : Thermal conductivity, HFO, HFC, Friction, Mixture, Modelling
• Source: 3^rd IIR conference on HFO Refrigerants and low GWP Blends. Shanghai, China.
• Formats : PDF

Recommended by the IIR

Basic study on application of magnetic nano-oil to scroll compressor – Measurement of friction and leakage.

• Author(s) : KIKUCHI T., MOTOZAWA M., FUKUTA M.
• Publication date: 2022/07/15
• Languages : English
• Keywords : Nanoparticle, Nanolubricant, Friction, Leakage, Scroll compressor, Expérimentation
• Source: 2022 Purdue Conferences. 26^th International Compressor Engineering Conference at Purdue.
• Formats : PDF

IIR document

Leakage and friction characteristics at sliding surface of tip seal in scroll compressors.

• Author(s) : FUKUTA M., SOTANI T., MOTOZAWA M.
• Publication date: 2021/05
• Languages : English
• Keywords : Scroll compressor, Seal, Leakage, Friction, Lubricant, Nitrogen, Expérimentation, Viscosity
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 125
• Formats : PDF

IIR document

An assessment of optimal airside heat transfer per unit friction power characteristics of compact heat exchangers.

• Author(s) : QASEM N. A. A., AL-GHAMDI A., ZUBAIR S. M.
• Publication date: 2019/03
• Languages : English
• Keywords : Friction, Heat transfer, Power, Simulation, Performance, Compact heat exchangeur
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 99
• Formats : PDF

An experimental study on bearing characteristics of compressor considering refrigerant dissolution and friction heat.

• Author(s) : SASAKI T., IKEDA Y., SASAKI S.
• Publication date: 2021/05
• Languages : English
• Keywords : High capacity, Lubricant, Refrigerant, Bearing, Compressor, Friction, Solubility, Expérimentation, Thermodynamic property, Testing, R410A, Polyolester
• Source: 2021 Purdue Conferences. 25^th International Compressor Engineering Conference at Purdue.
• Formats : PDF

IIR document

Flow boiling and frictional pressure gradients in plate heat exchangers. 1. Review and experimental database.

• Author(s) : AMALFI R. L., VAKILI-FARAHANI F., THOME J. R.
• Publication date: 2016/01
• Languages : English
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 61
• Formats : PDF

Friction properties of journal bearing having bell-mouth geometry.

• Author(s) : ISHIDA Y., USAMI H., NAKASHIMA N.
• Publication date: 2018/07/09
• Languages : English
• Keywords : Geometry, Friction, Wear, Refrigerator, Bearing, Testing, Reciprocating compressor
• Source: 2018 Purdue Conferences. 24^th International Compressor Engineering Conference at Purdue.
• Formats : PDF

Parametric study of friction model for reciprocating compressor.

• Author(s) : MANTRI P., TAMMA B., KACHHIA B., et al.
• Publication date: 2014/07/14
• Languages : English
• Keywords : Friction, Valve (compressor), Piston, Performance, Model, Pressure, Oil, Cylinder, Reciprocating compressor
• Source: 2014 Purdue Conferences. 22nd International Compressor Engineering Conference at Purdue.
• Formats : PDF

IIR document

The modified frictional loss efficiency correlation in an ejector 1-D numerical model.

• Author(s) : QI Z. G.
• Publication date: 2015/08/16
• Languages : English
• Keywords : Operation, Geometry, Friction, Efficiency, Simulation, Loss, Ejector
• Source: Proceedings of the 24th IIR International Congress of Refrigeration: Yokohama, Japan, August 16-22, 2015.
• Formats : PDF

Investigation of frictional pressure drop during flow boiling of R1234ze (E) in horizontal tube.

[In Chinese. / En chinois.]

• Author(s) : QIU J., ZHANG H., YU X., et al.
• Publication date: 2016/01
• Languages : Chinese
• Keywords : Horizontal tube, Friction, R1234ze, Expérimentation, Flow, Refrigerant, Boiling, Pressure drop
• Source: Journal of Refrigeration - vol. 37 - n. 167
• Formats : PDF

Research on motion and friction of rolling piston in rotary compressor.

• Author(s) : XU J., YU B., DING S. P., ZHAO H. H.
• Publication date: 2021/09
• Languages : English
• Keywords : Rotary compressor, Rolling piston compressor, Modelling, Calculation, Simulation, Friction, Reynolds, R32
• Source: 12^th International Conference on Compressors and their Systems
• Formats : PDF

REACH regulation: the restrictions proposed by five European states concern many alternative refrigerants

The European Chemicals Agency has been reviewing the proposed restrictions on PFAS, including some refrigerants, since February 7. 

• Publication date : 2023/02/17
• Subjects: Regulation

US: Court strikes down EPA restrictions on HFCs

In August, the US Court of Appeals for the District of Columbia (D.C.) overturned Environmental Protection Agency (EPA) directives to ban certain high GWP HFC refrigerants.

• Publication date : 2017/12/11
• Subjects: HFCs alternatives, Regulation

The delivery of blood to London hospitals may be impeded by Olympic transport restrictions

The delivery of blood to London hospitals may be impeded by Olympic transport restrictions, a UK delivery firm has warned. TNT Express has emphasized that increased congestion and restrictions on access, parking and delivery times could cause...

• Publication date : 2012/07/05

The benefits of linear compressors

Three articles published recently in the IJR illustrate the strength of R&D work around linear compressors and highlight the benefits of these, especially in commercial and domestic...

• Publication date : 2020/02/27

Compressors: Oil-free linear compressor

Linear technology could become the predominant energy-efficient refrigeration compressor design, according to Brazilian manufacturer Embraco which unveiled a domestic compressor offering linear technology with variable capacity, eliminating the...

• Publication date : 2011/02/11

Supercooling the LHC

CERN's Large Hadron Collider (LHC) is the new research instrument of the world's elementary particle physics community. This discovery-making machine will explore the structure of matter and basic forces of nature on a scale never attained before....

• Publication date : 2007/02/12

Magnetic-bearing centrifugal compressors

This new compressor technology - presented at the 2003 AHR Expo in Chicago - may have a significant effect on the future of mid-range chillers and rooftop applications in water-cooled, evaporatively cooled and air-cooled chilled-water and...

• Publication date : 2004/07/27

Data centre near London upgrades with Turbomiser chillers

The site’s power usage ratio has dropped by 24%

• Publication date : 2012/09/05

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

United States: latest news on HFC regulations

The US Court of Appeals for the District of Columbia has restored restrictions on the transition from ozone-depleting substances to high GWP HFCs.

• Publication date : 2020/04/24
• Subjects: HFCs alternatives, Regulation

Briefs: Edible optics to prevent food poisoning

Edible nanosensors made from silk could alert consumers regarding potential contamination of food thanks to a hologram-type indicator embedded in the pack. Researchers at Tufts University in the US are working on the development of bioactive silk...

• Publication date : 2008/10/25

Out of the ordinary: ice cream

A group of New Zealand scientists has developed a new therapeutic to help cancer patients recover from chemotherapy. Development of the ice cream, named ReCharge, began 8 years ago with the formation of LactoPharma, a collaborative research...

• Publication date : 2010/05/27

Charge minimization in hydrocarbon systems

This paper was presented at the IIR Gustav Lorentzen Conference in Glasgow (Sep. 2004). It presents the results of the project to minimize charge in a R290 system that has 1-1.5 kW refrigeration capacity. Currently, there are many guidelines...

• Publication date : 2004/11/24

Successful test of a dilution refrigerator for quantum computers

IBM scientists have succeeded in cooling a quantum computer chip to a temperature of 25 mK using a large-scale dilution refrigerator. 

• Publication date : 2022/10/27
• Subjects: Technology

Sorption chillers

Sorption chiller technology is rapidly developing, especially that using solar energy. - As highlighted by Jacob and Kohlenbach* during the latest IIR Gustav Lorentzen Conference on Natural Working Fluids in Sydney, in Europe, numerous new...

• Publication date : 2011/02/07

IIR member news: Embraco

Embraco, IIR Corporate Member, announced the launch of a new oil-less linear compressor design for domestic refrigeration.

• Publication date : 2014/04/27

Nanorefrigerants

Nanorefrigerants are created by adding nanoparticles in suspension to a base refrigerant. They have a thermal conductivity that is 15% to 104% higher than that of the corresponding...

• Last update : 2022/06/17
• Langues : English, French
• Themes : Nanofluids

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

Environmental impact of the ice cream industry

This summary document describes the environmental impact of ice cream manufacturing, which is mainly due to the energy consumption and refrigerants used.

• Last update : 2022/11/17
• Langues : French, English
• Themes : General information on environment (climate change, ozone depletion…)

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

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...

• Last update : 2022/06/22
• Langues : French, English
• Themes : Hydrocarbons, Containment, refrigerant charge reduction

Ice cream manufacturing, environmental impact and market data

From a physico-chemical point of view, ice cream is a complex, frozen multiphase mixture. The manufacturing process includes several stages of freezing which are described in this...

• Last update : 2023/06/30
• Langues : French, English
• Themes : Ice creams