phdthesis

Pascal Clain


Modelisation Group (2014) : Couplage entre le stockage et la distribution de froid par coulis d hydrates




Couplage entre le stockage et la distribution de froid par coulis d hydrates

Pascal Clain




phdthesis

The use of hydrate slurries as two-phase secondary refrigerants (FFD) reduces the environmental impact of refrigeration systems because these fluids have a high energy density. They can be used for cold storage will be a solution at an industrial problem of cold distribution at various temperature levels (air-conditioning, cooling process or preservation temperature). In this work, we study the coupling between a storage device and a cold distribution system by hydrate slurries. For achieve this objective, a two-stage reactor has been built for simulate the process. Equilibrium conditions studies for single and mixed hydrate showed an equilibrium temperature shift in porous media without deterioration of latent heat fusion. Hydrates formation/dissociation kinetics have been studied according to crystallization classical theories and an empirical model was obtained. Rheological studies of hydrate slurries emphasized a shear-thinning behavior for both, but a high propensity for agglomeration for mixed hydrate slurry. Particle size analysis showed the slurry has bimodal crystals distribution. Experimental set-up characterization showed process parameters effect in induction time. A 2D numerical tool integrating various empirical relations was developed for modelling temperature profile in the reactor and was validated in a first approach

To cite this publication :


Pascal Clain: Couplage entre le stockage et la distribution de froid par coulis d hydrates. Université Pierre et Marie Curie, 2014.





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