Améliorations de la performance des chauffe-eau commerciaux à pompe à chaleur utilisant le dioxyde de carbone.
Mejoras en el rendimiento de los calentadores de agua comerciales de bomba de calor que utilizan dioxido de carbono.
Auteurs : BOWERS C. D., ELBEL S., PETERSEN M., 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 US 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 (180ºF), as required by sanitary codes in the US (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 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 : 26-33 (7 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 : Mejoras en el rendimiento de los calentadores de agua comerciales de bomba de calor que utilizan dioxido de carbono.
- Identifiant de la fiche : 30006289
- Langues : Espagnol
- Source : Frío Calor Aire acondicionado - vol. 40 - n. 452
- Date d'édition : 11/2012
Liens
- Voir les traductions : Performance improvements in commercial heat pump water heaters using carbon dioxide.
Voir d'autres articles du même numéro (3)
Voir la source
-
Performance improvements in commercial heat pum...
- Auteurs : BOWERS C. D., ELBEL S., PETERSEN M., et al.
- Date : 21/08/2011
- Langues : Anglais
- Source : Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
- Formats : PDF
Voir la fiche
-
Development of high efficiency carbon dioxide c...
- Auteurs : PETERSEN M., BOWERS C. D., ELBEL S., et al.
- Date : 16/07/2012
- Langues : Anglais
- Source : 2012 Purdue Conferences. 14th International Refrigeration and Air-Conditioning Conference at Purdue.
- Formats : PDF
Voir la fiche
-
Evaluation de l'efficacité d'un cycle de pompe ...
- Auteurs : SAIKAWA M., HASHIMOTO K.
- Date : 2001
- Langues : Japonais
- Source : Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers - vol. 18 - n. 3
Voir la fiche
-
Development and experimental analysis of CO2 he...
- Auteurs : TRINCHIERI R., NICOLANDREA C., ROVELLA P.
- Date : 21/08/2016
- Langues : Anglais
- Source : 12th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2016). Proceedings. Édimbourg, United Kingdom, August 21st-24th 2016.
- Formats : PDF
Voir la fiche
-
Análisis experimental y simulación de bomba de ...
- Auteurs : HEINZ A., MARTIN K., RIEBERER R., et al.
- Date : 11/2011
- Langues : Espagnol
- Source : Frío Calor Aire acondicionado - vol. 39 - n. 441
- Formats : PDF
Voir la fiche