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Thermodynamic analysis on work transfer process of two gas streams / Jian - Qiang Deng in Industrial & engineering chemistry research, Vol. 49 N° 24 (Décembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 24 (Décembre 2010) . - pp. 12496-12502 Titre : Thermodynamic analysis on work transfer process of two gas streams Type de document : texte imprimé Auteurs : Jian - Qiang Deng, Auteur ; Ji - Quan Shi, Auteur ; Zao - Xiao Zhang, Auteur Année de publication : 2011 Article en page(s) : pp. 12496-12502 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Thermodynamic  analysis Résumé : A novel concept of gas-gas work exchanger (WE) is proposed for recovery of mechanical energy. Its thermodynamic process is analyzed by using the energy conservation law and the real gas's pressure-specific enthalpy diagram. An in-depth work evaluation model of the work transfer process is carried out. A simplified equation for quick forecast work recovery efficiency of a gas-gas work exchanger is derived. The performances of a gas-gas work exchanger are analyzed by predigesting some precondition. The work recovery efficiency of a gas—gas work exchanger is found to be lower than that of a liquid-liquid work exchanger, e.g., the work recovery efficiency of a diatomic molecule gas drops from 0.75 to 0.46 as the compression ratio is increased from 1.5 to 3.0. The higher compression rate results in more work loss. In the example case of this work, supposing the same nitrogen stream supplies the power for recovery, a three-stage recovery process can recover 79% more power than a single stage process. A low-pressure stream can be compressed and rise its temperature far higher than that of two original temperatures of the streams. It is a new approach to energy transfer driven by pressure difference and it is wholly different from the heat transfer in a heat exchanger (HE). A network combining WEs with HEs is proposed for recovering energy thoroughly and flexibly. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23692004 [article] Thermodynamic analysis on work transfer process of two gas streams [texte imprimé] / Jian - Qiang Deng, Auteur ; Ji - Quan Shi, Auteur ; Zao - Xiao Zhang, Auteur . - 2011 . - pp. 12496-12502. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 24 (Décembre 2010) . - pp. 12496-12502 Mots-clés : Thermodynamic  analysis Résumé : A novel concept of gas-gas work exchanger (WE) is proposed for recovery of mechanical energy. Its thermodynamic process is analyzed by using the energy conservation law and the real gas's pressure-specific enthalpy diagram. An in-depth work evaluation model of the work transfer process is carried out. A simplified equation for quick forecast work recovery efficiency of a gas-gas work exchanger is derived. The performances of a gas-gas work exchanger are analyzed by predigesting some precondition. The work recovery efficiency of a gas—gas work exchanger is found to be lower than that of a liquid-liquid work exchanger, e.g., the work recovery efficiency of a diatomic molecule gas drops from 0.75 to 0.46 as the compression ratio is increased from 1.5 to 3.0. The higher compression rate results in more work loss. In the example case of this work, supposing the same nitrogen stream supplies the power for recovery, a three-stage recovery process can recover 79% more power than a single stage process. A low-pressure stream can be compressed and rise its temperature far higher than that of two original temperatures of the streams. It is a new approach to energy transfer driven by pressure difference and it is wholly different from the heat transfer in a heat exchanger (HE). A network combining WEs with HEs is proposed for recovering energy thoroughly and flexibly. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23692004