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Numerical study of the thermal performance of well freezer cabinets.

Number: pap. 167

Author(s) : GOWREESUNKER B. L., TASSOU S. A., RAEISI A. H.

Summary

The cold-food chain is responsible for 28% of the energy consumption and 7% of the greenhouse gases emissions of the UK food chain. The majority of energy is consumed by low and medium temperature refrigeration equipment, of which well-type freezers contribute a sizeable proportion. The efficient thermal design of such systems is therefore crucial. This paper presents a numerical study of the thermal performance of a 300 L well type freezer. The main heat transfer mechanism in small freezers is natural convection due to buoyancy differences in the freezer’s air. As a result, the air movement and stratification phenomena are crucial in evaluating and optimising the performance of such systems. This study uses Computational Fluid Dynamics (CFD) to investigate the transient performance and to evaluate the heat transfer performance of such freezers. Extensive experimentation on a 300 L freezer established the thermal performance of the freezer at ISO23953 Climate Class 3 conditions. The data generated were used to calibrate and validate the accuracy of the CFD model. The model was subsequently used to gain fundamental understanding of the heat transfer parameters, with regards to the heat transfer rates, heat transfer coefficients and temperature stratification. This study depicts the effectiveness of CFD to develop correlations and thermal parameters which can be further used to enhance simpler lumped/nodal and holistic food-chain models, as well as to conduct parametric and optimisation analyses.

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Pages: 8 p.

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Details

  • Original title: Numerical study of the thermal performance of well freezer cabinets.
  • Record ID : 30012040
  • Languages: English
  • Source: 3rd IIR International Conference on Sustainability and the Cold Chain. Proceedings: London, UK, June 23-25, 2014
  • Publication date: 2014/06/23

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