Rheological properties of CO₂ hydrate slurry produced in a stirred tank reactor and a secondary refrigeration loop

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• 作者：Salem Jerbi^a ; ^{salem.jerbi@irstea.fr} ; Anthony Delahaye^a ; ^{anthony.delahaye@irstea.fr} ; Jé ; ré ; my Oignet^a ; ^{jeremy.oignet@irstea.fr} ; Laurence Fournaison^a ; ^{laurence.fournaison@irstea.fr} ; Philippe Haberschill^b ; ^{philippe.haberschill@insa-lyon.fr}
• 关键词：Carbon dioxide hydrates ; Phase change ; Slurries ; Rheology ; Multiphase flow ; Refrigeration
• 刊名：International Journal of Refrigeration
• 出版年：2013
• 出版时间：June, 2013
• 年：2013
• 卷：36
• 期：4
• 页码：1294-1301
• 全文大小：829 K

文摘

The aim of this paper is to present the rheological properties of CO₂ hydrate slurry for a use as secondary fluids in refrigeration systems. A set-up composed of a stirred tank reactor and a circulation loop was used to study CO₂ hydrate slurry formation and flowing. Rheological properties of CO₂ hydrate slurries circulating in the loop were determined by the capillary viscometer method. The results show a shear thinning behaviour of the CO₂ hydrate slurries for a solid fraction up to 22 % . This behaviour is correlated by an Ostwald-de-Waele empirical equation, which takes into account the hydrate fraction of the slurry. The apparent viscosity of CO₂ hydrate slurry was estimated from the model and a good agreement was found with the experimental data. A comparison with literature shows the importance of using a stirred reactor for slurry homogenisation, which allows the decrease of the apparent viscosity of the slurry.