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Performance evaluation of a variable speed DC compressor / Orhan Ekren in International journal of refrigeration, Vol. 36 N° 3 (Mai 2013) 

Public ISBD [article]  in International journal of refrigeration > Vol. 36 N° 3 (Mai 2013) . - pp. 745–757 Titre : Performance evaluation of a variable speed DC compressor Titre original : Evaluation de la performance d'un compresseur à courant continu à vitesse variable Type de document : texte imprimé Auteurs : Orhan Ekren, Auteur ; Serdar Celik, Auteur ; Brad Noble, Auteur Année de publication : 2013 Article en page(s) : pp. 745–757 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Direct  current;  Refrigeration;  Variable  speed;  Energy  saving;  Exergy Résumé : Direct current compressors are strong candidates to be employed in energy-efficient refrigeration systems, especially for renewable energy powered units, as these compressors do not require additional components such as a power inverter that an alternative current compressor would require. This study represents experimental performance analysis of a direct current type refrigeration compressor implemented in a 79 L refrigerator. Energy usage reduction and operational improvement potential of the direct current compressor via variable speed operation were investigated. Experiments were carried out at variable speed operation and four different constant speed operation modes of the compressor. Temperature, pressure, and power input measurements were obtained every 30 s. The experimental data were analyzed in terms of energy and exergy efficiencies. The comparison showed that variable speed operation of the direct current compressor can be much more efficient than constant speed operation of the direct current compressors, especially at higher speeds. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700712002435 [article] Performance evaluation of a variable speed DC compressor = Evaluation de la performance d'un compresseur à courant continu à vitesse variable [texte imprimé] / Orhan Ekren, Auteur ; Serdar Celik, Auteur ; Brad Noble, Auteur . - 2013 . - pp. 745–757. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 3 (Mai 2013) . - pp. 745–757 Mots-clés : Direct  current;  Refrigeration;  Variable  speed;  Energy  saving;  Exergy Résumé : Direct current compressors are strong candidates to be employed in energy-efficient refrigeration systems, especially for renewable energy powered units, as these compressors do not require additional components such as a power inverter that an alternative current compressor would require. This study represents experimental performance analysis of a direct current type refrigeration compressor implemented in a 79 L refrigerator. Energy usage reduction and operational improvement potential of the direct current compressor via variable speed operation were investigated. Experiments were carried out at variable speed operation and four different constant speed operation modes of the compressor. Temperature, pressure, and power input measurements were obtained every 30 s. The experimental data were analyzed in terms of energy and exergy efficiencies. The comparison showed that variable speed operation of the direct current compressor can be much more efficient than constant speed operation of the direct current compressors, especially at higher speeds. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700712002435