[article]
| Titre : |
Transcritical carbon dioxide microchannel heat pump water heaters: Part II – System simulation and optimization |
| Titre original : |
Systèmes de chauffage d'eau sanitaire à pompe à chaleur au dioxyde de carbone transcritique : Partie II – Simulation et optimisation du système |
| Type de document : |
texte imprimé |
| Auteurs : |
Christopher Goodman, Auteur ; Brian M. Fronk, Auteur ; Srinivas Garimella, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
pp. 870-880 |
| Note générale : |
Génie Mécanique |
| Langues : |
Anglais (eng) |
| Mots-clés : |
Gas cooler Microchannel Heat pump Transcritical Cycle Carbon dioxide |
| Index. décimale : |
621.5 Energie pneumatique. Machinerie et outils. Réfrigération |
| Résumé : |
This paper presents the development of a transcritical CO2 heat pump water heating system model incorporating analytical heat exchanger models and an empirical compressor model. This study investigated the effects of a suction line heat exchanger (SLHX) and once-through versus recirculating water heating schemes. The once-through systems outperformed the recirculating systems by 10% for the system without an SLHX and 15% with an SLHX. However, a gas cooler twice as large is required. The SLHX was shown to benefit system performance at higher evaporator temperatures with improvements of 16.5% for the once-through and 4% for the recirculating systems. This study can be used to improve the design of microchannel based transcritical CO2 heat pumps; evaluate the impact of varying water inlet temperature, desired outlet temperature and evaporation temperature on system performance; and quantify the effect of differential diurnal electricity rates on system operating costs for these different operation schemes. |
| DEWEY : |
621.5 |
| ISSN : |
0140-7007 |
| En ligne : |
http://www.sciencedirect.com/science/article/pii/S0140700710002756 |
in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 870-880
[article] Transcritical carbon dioxide microchannel heat pump water heaters: Part II – System simulation and optimization = Systèmes de chauffage d'eau sanitaire à pompe à chaleur au dioxyde de carbone transcritique : Partie II – Simulation et optimisation du système [texte imprimé] / Christopher Goodman, Auteur ; Brian M. Fronk, Auteur ; Srinivas Garimella, Auteur . - 2011 . - pp. 870-880. Génie Mécanique Langues : Anglais ( eng) in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 870-880
| Mots-clés : |
Gas cooler Microchannel Heat pump Transcritical Cycle Carbon dioxide |
| Index. décimale : |
621.5 Energie pneumatique. Machinerie et outils. Réfrigération |
| Résumé : |
This paper presents the development of a transcritical CO2 heat pump water heating system model incorporating analytical heat exchanger models and an empirical compressor model. This study investigated the effects of a suction line heat exchanger (SLHX) and once-through versus recirculating water heating schemes. The once-through systems outperformed the recirculating systems by 10% for the system without an SLHX and 15% with an SLHX. However, a gas cooler twice as large is required. The SLHX was shown to benefit system performance at higher evaporator temperatures with improvements of 16.5% for the once-through and 4% for the recirculating systems. This study can be used to improve the design of microchannel based transcritical CO2 heat pumps; evaluate the impact of varying water inlet temperature, desired outlet temperature and evaporation temperature on system performance; and quantify the effect of differential diurnal electricity rates on system operating costs for these different operation schemes. |
| DEWEY : |
621.5 |
| ISSN : |
0140-7007 |
| En ligne : |
http://www.sciencedirect.com/science/article/pii/S0140700710002756 |
|
Transcritical carbon dioxide microchannel heat pump water heaters: Part II – System simulation and optimization in International journal of refrigeration, Vol. 34 N° 4 (Juin 2011)
