Résultats de recherche

  • Une étape potentiellement importante dans la recherche de la supraconductivité à température ambiante (en anglais)

    Deux équipes de chercheurs viennent de rendre compte d’expériences indiquant qu’un hydrure de lanthane comprimé de 1,7 à 1,85 million de bar a une température critique de 250–260 K (-23 – -13 °C).

    • Date de publication : 31/01/2019
  • Integrated CO2-CHP system

    Brunel - a UK University - and 14 industrial partners in the commercial refrigeration sector have presented an innovative integrated energy system which has been designed to meet the needs of medium and large supermarkets and can be tailored to...

    • Date de publication : 11/02/2011
  • 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
  • CO2 applications: First hospital catering facility refrigeration system to run with CO2 in the UK

    A CO2 unit supplied by Green & Cool has been installed and commissioned by CCS Refrigeration, through Aggora on behalf of Medirest to provide for the on-site catering requirements of patients, restaurant and hospital staff at the Homerton...

    • Date de publication : 07/02/2011
  • 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
  • Le froid réduit l'indice glycémique du riz cuisiné

    Plusieurs études soulignent les avantages du froid sur l'indice glycémique du riz, qui est important dans la gestion de maladies chroniques telles que le diabète.Plusieurs études...

    • Date de publication : 05/12/2022
    • Sujets : Généralités
  • Efficacité des systèmes de pompe à chaleur géothermiques

    En dépit de coûts d’installation plus élevés, les pompes à chaleur de source géothermiques (PACg) sont réputées être plus efficaces que les pompes à chaleur aérothermiques plus répandues. Un article récent a...

    • Date de publication : 29/03/2021
    • Sujets : Technologie
  • Briefs: First transcritical CO2 supermarket system in Australia

    CO2 is raising interest in the retail industry in warm counties. Last November, a 1-day seminar organised by the Natural Refrigerants Transition Board (NRTB) focusing on the technical challenges related to transcritical CO2 systems, featured a...

    • Date de publication : 12/02/2008
  • Brief: Industrial Refrigeration Consensus

    During the Industrial RefrigerationConsensus hosted by Danfoss, held in December 2004 in Sønderborg , Denmark , the main following points were reached through workshop discussions with focus on the industrial refrigeration issues (thus the points...

    • Date de publication : 14/06/2005
  • 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
  • Brief: 12th c-dig meeting

    Uusikaupunki in Finland was the setting for the 12 th c-dig meeting in April 2005 attended by 55 delegates. Roughly half the presentations were by Finnish companies, reflecting the tremendous focus on carbon dioxide in the region in recent years....

    • Date de publication : 14/06/2005
  • Un nouveau mélange ininflammable pour améliorer la performance des systèmes au CO2

    Dans un récent article de la RIF, des chercheurs proposent de combiner le R744 avec le diméthyl-éther (DME) pour améliorer les performances tout en garantissant la sécurité et un...

    • Date de publication : 26/02/2024
    • Sujets : Technologie
  • 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
  • Briefs: ARTI's 21st Century Research Program

    During the 2004 ASHRAE Winter meeting in Anaheim, results from several research projects initiated under the ARTI (Air-Conditioning and Refrigeration Technology Institute) 21st Century Research Program - initiated by ARI (Air-Conditioning and...

    • Date de publication : 28/04/2004
  • TTI: new developments

    Time-Temperature Integrators (TTIs) are "intelligent labels" that simulate bacterial development, as a function of time-and-temperature parameters. As soon as a critical threshold is crossed, a change in colour alerts the consumer that the...

    • Date de publication : 15/11/2006