Modelling of the available latent heat of a CO2 hydrate slurry in an experimental loop applied to secondary refrigeration

Abstract : The present study investigates the suitability of CO2 hydrate for a use as phase change material in two-phase secondary refrigeration. Unlike the generation of the classical two-phase refrigerants, power limited by mechanical parts, hydrate slurry production has the advantage of being performed using a nonmechanical process. Nevertheless, in order to be efficient, the hydrate slurry needs to fulfil two major conditions: a high latent heat of melting of the solid phase and appropriate flowing conditions of the slurry carrying a sufficient amount of solid. Consequently, in the present work, multi-cycle differential scanning calorimetry (DSC) measurements were performed and confirmed a value of CO2 hydrate dissociation enthalpy of approximately View the MathML source500 kJ kgw−1, one and a half higher than that of ice View the MathML source(333 kJ kgw−1). Moreover, an experimental loop made it possible to study the CO2 hydrates in suspension in a carrying liquid and to model the available enthalpy of the system related to the solid fraction of the slurry.
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https://hal-ensta-paris.archives-ouvertes.fr//hal-01179681
Contributor : Didier Dalmazzone <>
Submitted on : Thursday, July 23, 2015 - 10:36:53 AM
Last modification on : Tuesday, September 10, 2019 - 11:54:03 AM

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Sandrine Marinhas, Anthony Delahaye, Laurence Fournaison, Didier Dalmazzone, Walter Fürst, et al.. Modelling of the available latent heat of a CO2 hydrate slurry in an experimental loop applied to secondary refrigeration. Chemical Engineering and Processing: Process Intensification, Elsevier, 2006, 45 (3), pp.184-192. ⟨10.1016/j.cep.2005.08.002⟩. ⟨hal-01179681⟩

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