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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

Measurement of transport properties for selected siloxanes and their mixtures used as working fluids for organic rankine cycles / Rima Abbas in Industrial & engineering chemistry research, Vol. 50 N° 14 (Juillet 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 14 (Juillet 2011) . - pp. 8756-8763 Titre : Measurement of transport properties for selected siloxanes and their mixtures used as working fluids for organic rankine cycles Type de document : texte imprimé Auteurs : Rima Abbas, Auteur ; E. Christian Ihmels, Auteur ; Sabine Enders, Auteur Année de publication : 2011 Article en page(s) : pp. 8756-8763 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Transport  properties Résumé : Thermal conductivities have been measured for three linear siloxanes [hexamethyl disiloxane (MM), octamethyl trisiloxane (MDM), decamethyltetrasiloxane (MD2M)], two cyclic siloxanes [octamethylcyclotetrasiloxane (D4), decamethylcyclopentasiloxane (D5)], and a mixture of 50 mass % MDM + 50 mass % MD2M in the temperature range from 290 to 520 K and the pressure range from 500 to 10000 kPa using the transient hot wire method and correlated with a temperature―pressure―thermal conductivity relationship. Moreover, the thermal conductivities at atmospheric pressure were measured for MM, D4, D5, and MD2M. The data were compared with the available data from the literature for four compounds. Additionally, the viscosities of the five siloxanes were measured in the temperature range from 238 to 378 K at atmospheric pressure using a rotational Stabinger viscometer. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24346916 [article] Measurement of transport properties for selected siloxanes and their mixtures used as working fluids for organic rankine cycles [texte imprimé] / Rima Abbas, Auteur ; E. Christian Ihmels, Auteur ; Sabine Enders, Auteur . - 2011 . - pp. 8756-8763. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 14 (Juillet 2011) . - pp. 8756-8763 Mots-clés : Transport  properties Résumé : Thermal conductivities have been measured for three linear siloxanes [hexamethyl disiloxane (MM), octamethyl trisiloxane (MDM), decamethyltetrasiloxane (MD2M)], two cyclic siloxanes [octamethylcyclotetrasiloxane (D4), decamethylcyclopentasiloxane (D5)], and a mixture of 50 mass % MDM + 50 mass % MD2M in the temperature range from 290 to 520 K and the pressure range from 500 to 10000 kPa using the transient hot wire method and correlated with a temperature―pressure―thermal conductivity relationship. Moreover, the thermal conductivities at atmospheric pressure were measured for MM, D4, D5, and MD2M. The data were compared with the available data from the literature for four compounds. Additionally, the viscosities of the five siloxanes were measured in the temperature range from 238 to 378 K at atmospheric pressure using a rotational Stabinger viscometer. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24346916