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Improving rotor hole shape to reduce force in cold pressing rotor into Crankshaft.

• Author(s) : CHU C., LUO J., WU S., et al.
• Publication date: 2014/07/14
• Languages : English
• Keywords : Geometry, Crankshaft, Design, Rotor, Simulation, Hermetic compressor, Reciprocating compressor
• Source: 2014 Purdue Conferences. 22nd International Compressor Engineering Conference at Purdue.
• Formats : PDF

Investigation of the parameters affecting crankshaft and rotor interference fit.

• Author(s) : EYYUBOGLU N. A.
• Publication date: 2014/07/14
• Languages : English
• Keywords : Crankshaft, Rotor, Model, Expérimentation, Hermetic compressor, Compressor
• Source: 2014 Purdue Conferences. 22nd International Compressor Engineering Conference at Purdue.
• Formats : PDF

Application of path homotopy in twin screw compressor rotor profile design.

• Author(s) : PATIL S., STOSIC N., KOVACEVIC A., SMITH I., ASATI N.
• Publication date: 2021/09
• Languages : English
• Keywords : Screw compressor, Rotor, Review, Modelling, Design
• Source: 12^th International Conference on Compressors and their Systems
• Formats : PDF

IIR document

Dynamic characteristics improvement of the single screw compressor with odd-grooves screw rotor.

• Author(s) : PENG C., WU W., ZHANG Z., XIE J., FENG Q., HE Z.
• Publication date: 2021/12
• Languages : English
• Keywords : Screw compressor, Optimization, Rotor, Groove, Modelling
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 132
• Formats : PDF

IIR document

Analysis of rigid rotor of magnetic refrigeration compressor.

• Author(s) : HU Y., CHEN B., ZHANG F., et al.
• Publication date: 2019/08/24
• Languages : English
• Keywords : Damping, Vibration, Rotor, Bearing, Simulation, Modelling, Frequency, Magnetic compressor, Centrifugal compressor
• Source: Proceedings of the 25^th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
• Formats : PDF

Dynamic analyses for the rotor-journal bearing system of a twin-screw refrigeration compressor.

• Author(s) : HOU F., WANG C., YU Z. Q., et al.
• Publication date: 2017/07/20
• Languages : English
• Keywords : Rotor, Bearing, Modelling, Expérimentation, Screw compressor
• Source: 8th international conference on compressors and refrigeration, 2017.
• Formats : PDF

IIR document

Experimental study of the axial force on the rotors in a twin-screw refrigeration compressor.

• Author(s) : HOU F., ZHAO Z., YU Z., et al.
• Publication date: 2017/03
• Languages : English
• Keywords : Design, Rotor, Pressure, Expérimentation, Screw compressor
• Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 75
• Formats : PDF

Recommended by the IIR

Improving screw compressor rotors – a collaboration of manufacturing and design engineers.

• Author(s) : SAULS J. R., HOLMES C. S.
• Publication date: 2021/09
• Languages : English
• Keywords : History, Generality, Screw compressor, Rotor, Geometry, Manufacture
• Source: 12^th International Conference on Compressors and their Systems
• Formats : PDF

Development of an interior permanent magnet motor through rotor cooling for electric vehicles.

• Author(s) : LEE K. H., CHA H. R., KIM Y. B.
• Publication date: 2016/02/25
• Languages : English
• Keywords : Magnet, Rotor, Cooling, Power, Optimization, Electric motor
• Source: Applied Thermal Engineering - vol. 95

Improvement of the efficiency of twin-screw refrigeration compressors by means of dual lead rotors.

• Author(s) : UTRI M., BRÜMMER A.
• Publication date: 2016/07/11
• Languages : English
• Keywords : Rotor, Efficiency, Optimization, Compression, Screw compressor
• Source: 2016 Purdue Conferences. 23^rd International Compressor Engineering Conference at Purdue.
• Formats : PDF

The study on dynamic characteristics of twin-screw compressor rotor.

• Author(s) : XIONG B., WU H., LIN K., ZHANG B.
• Publication date: 2021/05
• Languages : English
• Keywords : Screw compressor, CFD, Simulation, Thermodynamic property, Temperature, Pressure, Rotor, Distribution
• Source: 2021 Purdue Conferences. 25^th International Compressor Engineering Conference at Purdue.
• Formats : PDF

CFD modelling of a twin screw expander using a single domain rotor grid.

• Author(s) : KARVOUNTZIS-KONTAKIOTIS A., SINGH G., KOVACEVIC A., et al.
• Publication date: 2018/07/09
• Languages : English
• Keywords : CFD, Screw, Rotor, Simulation, Prediction, Performance, Expander
• Source: 2018 Purdue Conferences. 24^th International Compressor Engineering Conference at Purdue.
• Formats : PDF

Recommended by the IIR

Reducing rotors clearance - a way to increase the performance of a screw compressor.

• Author(s) : NITULESCU M., SLUJITORU C., PETRESCU V., SILIVESTRU V., FETEA G., TOMESCU S.
• Publication date: 2021/09
• Languages : English
• Keywords : Screw compressor, Performance, Rotor, Testing, Coating (materials), Clearance
• Source: 12^th International Conference on Compressors and their Systems
• Formats : PDF

Practical application of sorption rotors in the air drying technology of objects for different purposes.

• Author(s) : PJEVIC A.
• Publication date: 2017/12/06
• Languages : English
• Keywords : Dehumidification, Rotor, Air, Drying, Expérimentation, Condensation
• Source: 48^th International HVAC&R Congress and Exhibition.
• Formats : PDF, PowerPoint

Experimental investigation of heat transfer in a rotor–stator cavity with cooling air inlet at low radius.

• Author(s) : LUO X., WANG L., ZHAO X., et al.
• Publication date: 2014/09
• Languages : English
• Keywords : Heat transfer, Rotor, Nusselt, Expérimentation
• Source: International Journal of Heat and Mass Transfer - vol. 76

Refrigerant news: General Motors

General Motors has announced that it will convert by 2013 the air-conditioning systems in its entire fleet of Chevrolet, Cadillac, Buick and GM models from HFC-134a (GWP of 1300) to HFC-1234yf developed by Honeywell and DuPont (GWP of 4). GM said...

• Publication date : 2011/02/07

Motor vehicle air-conditioning manufacturing in the U.S

The industry's revenue for the year 2012 was reported at USD 5.9 billion, with an estimated gross profit of 20.85%.

• Publication date : 2013/12/01

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

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

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

Chillers: efficiency takes off

Chillers are key refrigerating systems since, according to the Department of Energy, in the US, they account for about 13% of the power consumed by the nation's buildings and 9% of the overall demand for electric power. Examples below illustrate...

• Publication date : 2008/10/25

The Bank of England overhauls chillers

A new cooling system at the Bank of England building, in the City of London, has saved an estimated 48% on cooling energy, which translates to €190,000 a year.

• Publication date : 2016/05/24

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: Environment, Developing country

China: Latest policy measures to tackle end-of-life recycling and disposal of cooling equipment

In 2024, China has implemented several measures to reduce emissions from HFC and HCFC refrigerant recycling and recovery through cooling equipment end-of-life recycling and disposal.

• Publication date : 2024/08/27
• Subjects: Regulation, General information

China: new CO2 heat pump standard

Standard GB/T26181-2010 is for hermetic motor-compressors for household and similar-use heat pump water heaters using CO2 refrigerant, and is expected to accelerate the introduction of new products on the Chinese market.

• Publication date : 2011/12/22

Linear compressor key to fridge efficiency?

The US Department of Energy’s Oak Ridge National Laboratory and Whirlpool are collaborating to design a domestic refrigerator that could cut energy use by up to 40% compared with current models.

• Publication date : 2015/06/15

A novel method for frost detection

Frost growth on the evaporator coils of a refrigeration plant can dramatically reduce its efficiency. A novel indirect detection method that would avoid frost built-up has been developed.

• Publication date : 2020/02/06

Market assessment and financial schemes for sustainable cooling in Ghana and Senegal

In partnership with the UNEP’s “United for Efficiency”, Ghana and Senegal have implemented financing schemes to replace obsolete ACs and refrigerators, as part of the ECOWAS Refrigerators and Air Conditioners...

• Publication date : 2021/05/17
• Subjects: Figures, economy, Developing country

Refrigerator sales rise in 2015 in France

Sales of refrigerators in France in 2015 increased by 4.7% and total sales reached 2.62 million units.

• Publication date : 2016/07/08
• Subjects: Figures, economy

IJR highlights: latest R&D results regarding household refrigerators

Vacuum insulation panels, mini-channel condensers and PCMs: 3 areas of research and development to reduce the energy consumption ofhousehold refrigerators.

• Publication date : 2019/01/31

Upcoming IIR events: Portorosz

The 2nd IIR International Conference on Magnetic Refrigeration at Room Temperature will take place on April 11- 13, 2007 in Portorosz, Slovenia and follows a very successful initial event held in Montreux, Switzerland in September 2005. Find out...

• Publication date : 2006/07/26

Upcoming IIR events: Portoroz

The 2nd IIR International Conference on Magnetic Refrigeration at Room Temperature will take place on April 11- 13, 2007 in Portoroz, Slovenia. Present a paper and register:

• Publication date : 2006/11/15

Upcoming IIR events: Portoroz

The 2nd IIR International Conference on Magnetic Refrigeration at Room Temperature will take place on April 11-13, 2007 in Portoroz, Slovenia. Register: www.thermag2007.si Alojz Poredos

• Publication date : 2007/02/12

The notoriety of the IJR increases further!

The impact factor of the International Journal of Refrigeration increases for the fourth consecutive year. 

• Publication date : 2022/09/28

News from IIR members: MYCOM Mayekawa

The Japanese compressor manufacturer MYCOM Mayekawa will be introducing its high-efficiency NH3/CO2 cooling system NewTon3000 within the context of the Garden City Ammonia Program (GCAP). GCAP is actively promoting CO2 emissions reduction and...

• Publication date : 2011/02/07

Obituary: Per-Oskar Persson

The former Managing Director of Frigoscandia AB, Per-Oskar Persson of Helsingborg, Sweden passed away on August 26, 2008, at the age of 84. He was an Honorary Member of IIR, President of Commission D1, 1971 - 1979, and Head of Section D 1979 -...

• Publication date : 2008/09/29

City, University of London organises its 11th Conference on Compressors

Organized biennially by City, University of London, the 11th International Conference on Compressors and their Systems took place on September 9-11, 2019.

• Publication date : 2019/09/30

New in our Encyclopedia: additive manufacturing for refrigeration equipment

Additive manufacturing makes it possible to optimise the geometry and performance of cooling components such as heat exchangers and regenerators for caloric...

• Publication date : 2022/09/28
• Subjects: Technology

IIR member news : Linde

The CSG-4 snow generator allows to generate snow on demand or via programming and is claimed to offer a cost effective and safe alternative to dry ice pellets.

• Publication date : 2015/05/20

Member news: Ultra-low temperatures. NIST creates a more efficient pulse-tube refrigerator prototype

American researchers have created a prototype pulse-tube refrigerator that significantly reduces the time and energy required to reach temperatures close to absolute zero: an exciting advance for the quantum...

• Publication date : 2024/06/27

24th Conference of the Parties to the United Nations Framework Convention on Climate Change in Poland

The 24th Conference of the Parties to the United Nations Framework Convention on Climate Change was held in Katowice, Poland, on December 3-14. Didier Coulomb, director of the IIR, made a statement.

• Publication date : 2018/12/27
• Subjects: Regulation, Environment

The 30th Conference of the Parties to the Montreal Protocol in Quito, Equador

The 30th Conference of the Parties to the Montreal Protocol took place in Quito (Equador) on 5-9 November 2018. Didier Coulomb, Director General of the IIR, made a statement.

• Publication date : 2018/11/22
• Subjects: Regulation, HFCs alternatives

Review of F-gas regulation - IIR contribution

The IIR has responded to the European Commission consultation “Fluorinated greenhouse gases – review of EU rules (2015-20)” which aims to collect opinions and suggestions about the update of the F-gas Regulation...

• Publication date : 2020/09/06
• Subjects: Regulation, HFCs alternatives, Environment

Refrigeration and the IIR in the spotlight at COP 28

The Conference of the Parties on Climate Change took place in Dubai (United Arab Emirates) from 30 November to 13 December 2023. For the first time, refrigeration was given special attention. The IIR shared a...

• Publication date : 2023/12/18
• Subjects: Environment

IJR editorial: The cop on climate change: a growing presence of refrigeration issues to be consolidated

The Conference of the Parties on climate change was held in Sharm-El-Sheikh (Egypt) from Sunday 6 November to Sunday 20 November 2022. Generally speaking, this COP did not result in the decisions and actions...

• Publication date : 2023/01/23
• Subjects: Environment

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)

Global HFC emissions from the refrigeration sector

This table shows HFC emissions from the refrigeration sector – including air conditioning – in million tonnes of CO2 equivalent for about 40 countries that are signatories...

• Last update : 2022/01/20
• Langues : English
• Themes : General information on environment (climate change, ozone depletion…)

Kigali Amendment status per country

List of the 163 countries that have accepted, approved or ratified the Kigali Amendment as of November 15, 2024.

• Last update : 2024/11/15
• Langues : English
• Themes : Regulations and standardization (Montreal and Kyoto Protocols…)

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

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…)

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

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

Liquefied Natural Gas: production process and cold energy recovery

Liquefied natural gas (LNG) is natural gas that has been cooled to about -160 °C and turned into a liquid to facilitate transportation and storage. A typical LNG supply chain...

• Last update : 2023/06/23
• Langues : French, English
• Themes : LNG and LPG

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...

• Last update : 2023/09/15
• Langues : French, English
• Themes : HFCs

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