Partager

Système commercial de chauffage d'eau sanitaire de prochaine génération à pompe à chaleur utilisant le dioxyde de carbone et faisant appel à plusieurs approches d'amélioration.

Nueva generación de calentadores de agua comerciales por bomba de calor utilizando dióxido de carbono y differentes enfoques de majora.

Auteurs : BOWERS C., PETERSEN M., ELBEL S., et al.

Type d'article : Article

Résumé

Although heat pump water heaters are today widely accepted in Japan, where energy costs are high and government incentives for their use exist, acceptance of such a product in the U.S. has been slow. This trend is slowly changing with the introduction of heat pump water heaters into the residential market, but remains in the commercial sector. Barriers to heat pump water heater acceptance in the commercial market have historically been performance, reliability and first/operating costs. The use of carbon dioxide (R744) as the refrigerant in such a system can improve performance for relatively small increase in initial cost and make this technology more appealing. What makes R744 an excellent candidate for use in heat pump water heaters is not only the wide range of ambient temperatures within which it can operate, but also the excellent ability to match water to refrigerant temperatures on the high side, resulting in very high exit water temperatures of up to 82°C, as required by sanitary codes in the U.S. (Food Code, 2005), in a single pass, temperatures that are much more difficult to reach with other refrigerants. This can be especially attractive in applications where this water is used for the purpose of sanitation. While reliability has also been of concern historically, dramatic improvements have been made over the last several years through research done in the automotive industry and commercialization of R744 technology in residential water heating mainly in Japan. This paper presents the performance results from the development of an R744 commercial heat pump water heater system of approximately 35 kW and a comparison to a baseline R134a unit of the same capacity and footprint. In addition, recommendations are made for further improvements of the R744 system which could result in possible energy savings of up to 20%.

Documents disponibles

Format PDF

Pages : 28-36 (8 p.)

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Nueva generación de calentadores de agua comerciales por bomba de calor utilizando dióxido de carbono y differentes enfoques de majora.
  • Identifiant de la fiche : 30010917
  • Langues : Espagnol
  • Source : Frío Calor Aire acondicionado - vol. 42 - n. 466
  • Date d'édition : 02/2014

Liens


Voir d'autres articles du même numéro (3)
Voir la source

Indexation