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Measurement of thermophysical pure component properties for a few siloxanes used as working fluids for organic rankine cycles / Rima Abbas in Industrial & engineering chemistry research, Vol. 50 N° 16 (Août 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 16 (Août 2011) . - pp. 9748-9757 Titre : Measurement of thermophysical pure component properties for a few siloxanes used as working fluids for organic rankine cycles Type de document : texte imprimé Auteurs : Rima Abbas, Auteur ; Andre Schedemann, Auteur ; Christian Ihmels, Auteur Année de publication : 2011 Article en page(s) : pp. 9748-9757 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Thermophysical  Siloxanes Résumé : In this work, heat capacities for three linear siloxanes (hexamethyl disiloxane (MM), octamethyltrisiloxane (MDM), and decamethyltetrasiloxane (MD2M)) in the temperature range of 205.15―395.15 K and for two cyclic siloxanes (octamethylcyclotetrasiloxane (D4) and decamethylcyclopentasiloxane (Ds)) in the temperature range of 288.15―443.15 K have been measured with the help of a Tian―Calvert calorimeter. Furthermore, vapor pressures for the five mentioned compounds in the temperature range of 250―620 K and pressures from 2 mbar to 1 bar have been determined with the help of a Scott ebulliometer. The prediction of the heat capacities using the group contribution equation of state VTPR were improved by fitting the Twu parameters simultaneously to the new vapor pressure and heat capacity data. In addition, melting temperatures and heat of fusions for these five siloxanes have been measured using a differential scanning calorimeter (DSC). Furthermore, density measurements for the three linear siloxanes (MM, MDM, and MD2M) between 278 and 437 K and pressures up to 130 MPa were carried out using a vibrating tube densimeter. The densities were correlated with the TRIDEN model. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24425220 [article] Measurement of thermophysical pure component properties for a few siloxanes used as working fluids for organic rankine cycles [texte imprimé] / Rima Abbas, Auteur ; Andre Schedemann, Auteur ; Christian Ihmels, Auteur . - 2011 . - pp. 9748-9757. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 16 (Août 2011) . - pp. 9748-9757 Mots-clés : Thermophysical  Siloxanes Résumé : In this work, heat capacities for three linear siloxanes (hexamethyl disiloxane (MM), octamethyltrisiloxane (MDM), and decamethyltetrasiloxane (MD2M)) in the temperature range of 205.15―395.15 K and for two cyclic siloxanes (octamethylcyclotetrasiloxane (D4) and decamethylcyclopentasiloxane (Ds)) in the temperature range of 288.15―443.15 K have been measured with the help of a Tian―Calvert calorimeter. Furthermore, vapor pressures for the five mentioned compounds in the temperature range of 250―620 K and pressures from 2 mbar to 1 bar have been determined with the help of a Scott ebulliometer. The prediction of the heat capacities using the group contribution equation of state VTPR were improved by fitting the Twu parameters simultaneously to the new vapor pressure and heat capacity data. In addition, melting temperatures and heat of fusions for these five siloxanes have been measured using a differential scanning calorimeter (DSC). Furthermore, density measurements for the three linear siloxanes (MM, MDM, and MD2M) between 278 and 437 K and pressures up to 130 MPa were carried out using a vibrating tube densimeter. The densities were correlated with the TRIDEN model. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24425220