Analysis of the air flow in a cold store by means of computational fluid dynamicsAnalyse du débit d'air dans un entrepôt frigorifique à l'aide de la dynamique des fluides informatisée |
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Authors: | M L Hoang P Verboven J De Baerdemaeker B M Nicolaï |
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Affiliation: | Department of Agro-Engineering and -Economics, K.U. Leuven, Kardinaal Mercierlaan 92E, B-3001 Heverlee, Belgium |
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Abstract: | Airflow inside a cold store is investigated using computational fluid dynamics. The airflow model is based on the steady state incompressible, Reynolds-averaged Navier–Stokes equations. The turbulence is taken into account using a k− model. The standard as well as the Renormalisation-Group (RNG) version of the k− model is investigated. The forced-circulation air cooler unit is modelled with an appropriate body force and resistance, corresponding to the characteristics of the fan and the tube-bank evaporator. The finite volume method of discretisation is used. The validation of the model has been performed by a comparison of the calculated time-averaged velocity magnitudes with the mean velocities measured by means of a hot-film type omni-directional velocity sensor. A relative error on the calculated air velocities of 26% was observed. The RNG k− model does not help to improve the prediction of the recirculation. Both a finer grid and enhanced turbulence models are needed to improve the predictions. |
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Keywords: | Cold store Air distribution Simulation ComputerizedEntrepô t frigorifique Distribution d'air Simulation Informatique |
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