Résultats de recherche

  • Briefs: CO2 heat pumps in a retirement home

    Villa Laura, a retirement home near Florence, Italy, is equipped with 4 water/water ground-water heat pumps operating with a transcritical CO2 cycle providing heating, air conditioning and hot water. This technology is already used to produce hot...

    • Date de publication : 20/11/2007
  • CO2 Supermarkets

    The journal Die Kälte und Klimatechnik has just produced an article on the opening of a supermarket using refrigeration installations for the first time running on direct expansion CO2 with both medium and low temperatures in Wettingen,...

    • Date de publication : 26/10/2005
  • Development and evaluation of a reversible CO2 residential air conditioning system compared to a state-of-the art R410a unit

    This paper was presented at the IIR Gustav Lorentzen Conference in Glasgow (Sep. 2004). A reversible CO2 prototype RAC split unit system was designed, built and installed in two calorimetric test chambers. The unit is based on the Lorentzen Cycle...

    • Date de publication : 24/11/2004
  • Underground storage of liquid CO2

    Dispensing of CO2 by storing it underground usually implies placing it in aquifer rocks deep enough (-800 m) to achieve sufficient pressure to maintain the CO2 in a supercritical (fluid) phase. This approach has many shortcomings as in this form,...

    • Date de publication : 15/11/2006
  • Refrigeration’s contribution to CCS

    Led by IFP (France), the European research project Cocate - which brings together 8 other research and industrial partners worldwide for a budget of 4.5 million € - tackles the problems of rolling out a shared transportation infrastructure capable...

    • Date de publication : 27/05/2010
  • CO2 supermarkets: CAREL

    CAREL and the French hypermarket chain Carrefour have joined forces to develop the first subcritical CO2 plant in a supermarket in Turkey. The Istanbul installation uses a cascade system that supplies the low-temperature units with R744. To...

    • Date de publication : 27/05/2010
  • Natural refrigerants in emerging countries: South Africa

    South Africa is facing an energy shortage and a rise in electricity prices. Natural refrigerants, which have important energy saving potential, are now being introduced, especially in supermarkets. Here are 2 examples: . GTZ has offered technical...

    • Date de publication : 07/03/2010
  • Regulations and use of HFCs in the USA

    Under section 608 of the Clean Air Act, it has been illegal since November 15, 1995, to knowingly vent substitutes for CFC and HCFC refrigerants during the maintenance, service, repair and disposal of air-conditioning and refrigeration equipment....

    • Date de publication : 14/09/2004
  • European Union: Revision of EN378 standard

    The European Standard "Refrigerating systems and heat pumps - Safety and environmental requirements" has been republished following comprehensive review. The previous version of the standard, EN378:2000, has been withdrawn and replaced by...

    • Date de publication : 18/05/2009
  • CO2 supermarkets: Tesco

    Designed as Tesco's first zero-carbon store, the new store at Ramsey, Cambridgeshire, UK, is completely HFC-free. The supermarket is hence using natural refrigerants CO2 and hydrocarbons throughout its refrigerators, freezers, heating, ventilation...

    • Date de publication : 27/05/2010
  • 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...

    • Date de publication : 15/11/2006
  • Growing interest in CO2 technology

    Scientists and refrigeration practitioners are increasingly interested in carbon dioxide (CO2) technology. The IIR's Fridoc database contains 198 references to articles mentioning CO2 in their titles and 448 containing the term CO2 in the key...

    • Date de publication : 28/04/2004
  • CHEs in heat pumps

    In its Annex 33, "Compact Heat Exchangers in Heat Pumping Equipment" issued in September 2010, the Heat Pump Programme details the benefits of using compact heat exchangers (CHEs): . Improved heat exchanger thermal effectiveness: thermal...

    • Date de publication : 07/02/2011
  • Alternative Cooling Technologies conference, London, 1st February 2005

    This conference, which was co-sponsored by the UK Institute of Refrigeration and organised commercially by RAC magazine, was well attended with about 140 people present. It was arranged in five sessions. In the first session, speakers from UK...

    • Date de publication : 11/02/2005
  • Conférence IIF Rankine 2020 : quels fluides actifs alternatifs pour les systèmes ORC ?

    Les HFO (hydrofluorooléfines), les HCFO (hydrochlorofluorooléfines) et les hydrocarbures sont les principales alternatives au HFC245fa mises en avant durant la Conférence Rankine 2020 de l’IIF.

    • Date de publication : 04/09/2020
    • Sujets : Alternatives aux HFC
  • News from IIR members: Alfa Laval

    Alfa Laval is providing solutions for the fast-expanding CO2 market and has launched two new brazed heat exchanger models designed for transcritical CO2 systems for transport refrigeration, commercial refrigeration and heat-pump applications. The...

    • Date de publication : 09/12/2009
  • Cryogenics and Low-Temperature Physics: New Horizons and Challenges

    This Focus written by Ralf Herzog*, President of the IIR’s Cryophysics, Cryoengineering commission (Commission A1) for the Newsletter of the IIR is the third in a series of presentations of the activities and hot research topics handled by the...

    • Date de publication : 21/09/2012
  • Visite technique du marché aux poissons de Tokyo

    Lors de la conférence ICCC en juin dernier, les participants ont eu la possibilité de participer à des visites techniques, dont celle du marché aux poissons de Tokyo. Alain Le Bail, Président de la commission C2...

    • Date de publication : 15/11/2024