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  • Micro-refrigeration

    Future computer chips will probablly generate 10 times more heat than today's microprocessors and will require new types of cooling systems. Currently, computers are usually cooled thanks to fans and small finned devices called heat sinks, but the...

    • Publication date : 2008/08/12
  • Brief: R-723

    The new natural refrigerant blend R-723 presents the same advantages as ammonia (i.e. high specific evaporation heat and insignifigant GWP) and offers further benefits: it can be used in copper systems and offers full mineral oil solubility. R-723...

    • Publication date : 2005/02/11
  • Briefs: solar air-conditioning prototype

    As part of the European programme Solera, CEA LITEN researchers recently set up a 4.5-kW solar air-conditioning prototype in the facilities of the INES (French National Institute of Solar Energy) in Chambéry in the French Alps, where the system...

    • Publication date : 2009/12/09
  • 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
  • H-fluid as an alternative to HFC-134a?

    The new European Directive 2006/40 on emissions from air-conditioning systems in motor vehicles - which bans F-gases with a GWP higher than 150 (such as HFC-134a) as of 2011 for new models of cars - and Californian legislation which is putting...

    • Publication date : 2006/11/15
  • Innovative system to cool spacecraft on long missions

    An innovative cooling system developed by a team of mechanical engineers has proven successful in testing aboard the International Space Station.

    • Publication date : 2018/05/17
  • DuPont’s new HFO 1336mzz could replace R123

    DuPont has announced it is to start small scale production of a new low GWP HFO which could replace R123.

    • Publication date : 2014/05/22
    • Subjects: HFCs alternatives
  • IIR Rankine Conference 2020: Which alternative working fluids for ORC systems?

    HFOs (hydrofluoroolefins), HCFOs (hydrochlorofluoroolefins) and hydrocarbons were the main alternatives to HFC245fa presented during the IIR Rankine Conference 2020.

    • Publication date : 2020/09/04
    • Subjects: HFCs alternatives
  • Reducing the environmental impact of ultra-low temperature refrigeration systems

    Ultra-low temperature (ULT) refrigeration systems often use very high-GWP HFCs. Yet, ULT systems are excluded from the scope of the regulations aimed at phasing-down HFCs. An IJR paper reviews the most promising...

    • Publication date : 2020/04/05
    • Subjects: Environment, HFCs alternatives
  • Data centers: immersion cooling project

    The world’s most powerful two-phase immersion cooling (2PIC) project, which will be deployed in a 40+ MW data center being constructed by BitFury Group, is currently underway in the Republic of Georgia.

    • Publication date : 2016/05/12
  • Overview of data center cooling technologies

    The very huge growth in Internet traffic requires the continued development of new energy-efficient data center cooling technologies, based primarily on liquid...

    • Publication date : 2022/12/15
    • Subjects: Technology
  • ICR2011 highlights: cooling particle detectors

    Cooling systems for particle detectors attracted interest at the IIR’s Congress in Prague in August 2011. These highly specific applications have very strict requirements compared with standard cooling systems: refrigerants should be resistant to...

    • Publication date : 2012/02/21
  • Cryogenics 2021 highlights: applications of liquid nitrogen

    Cryopreservation of biological materials to favour biodiversity and cooling of superconducting cables to allow transmission of electrical energy with zero resistance are key applications of liquid...

    • Publication date : 2022/01/28
  • Towards a sustainable seafood cold chain

    Several FAO (UN’s Food and Agriculture Organisation) reports present the figures and challenges of the seafood cold chain.

    • Publication date : 2023/02/06
    • Subjects: Figures, economy, Developing country
  • IIR Cryogenics 2023 conference: perspectives of cryogenic technologies for 2030

    Overview of future technological advances in cryogenics: liquid hydrogen electric aircrafts, cryofuels, hydrogen chemical energy conversion, fuel cells for energy storage, cryogenic rocket engine, quantum and...

    • Publication date : 2023/06/27
  • 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 : English, French
    • 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 : English, French
    • Themes : LNG and LPG