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Vertical display cabinets in supermarkets: energy efficiency and the influence of air flows.

Author(s) : AXELL M.

Type of monograph: Doctoral thesis

Summary

The purpose of this thesis was to analyse the energy flows in open vertical refrigerated display cabinets in order to investigate the ways in which their energy efficiency might be improved. Although the work concentrated on display cabinets cooled by an indirect system, most of the conclusions are also directly applicable to display cabinets cooled by direct expansion systems. The thesis was written as a monograph, with each individual chapter including references to, and descriptions of, relevant material with direct links to the chapter concerned. Each chapter has its own reference list and conclusions. Chapter 1 describes the background to, and the limitations of, the work and its purpose, and summarises and comments on the most important published reports and articles. Chapter 2 describes the results and experience from investigations of a larger number of display cabinets under controlled conditions in a climate chamber. Chapter 3 provides a theoretical analysis of the operation of display cabinets, based on the experimental results described in Chapter 2 and on reviews of the literature. It also discusses a number of key functions and components that affect the overall energy use and performance of display cabinets. Chapter 4 describes experimental investigations carried out in a climate chamber on an open vertical display cabinet, with the aim of investigating how ambient conditions affect its cooling demand and thermal climate. The results and conclusions were then linked to results from field measurements. Experience from the earlier experimental investigations described in Chapter 2, from the review of the literature, has provided a structure for determining the contents of the programme. Chapter 5 provides an analysis of energy flows in the cabinet, based on the experimental results. Factors that affect the magnitudes of the various heat inputs are identified, and ways in which they could be minimised are analysed. Chapter 6 describes investigations carried out in order to describe the air flows in vertical display cabinets. This involved both experimental and theoretical work, using CFD models. Chapter 7 describes a parametric investigation in order to describe how the width/height relationship of the air curtain affects performance. Chapter 8 is a summary of the conclusions from the work described in the earlier chapters.

Details

  • Original title: Vertical display cabinets in supermarkets: energy efficiency and the influence of air flows.
  • Record ID : 2004-0960
  • Languages: English
  • Publication: Chalmers University of Technology, Department of Building Services Engineering - Sweden/Sweden
  • Publication date: 2002
  • ISBN: 9172912391
  • Source: Source: D66:2002; 256 p. (17 x 24); fig.; tabl.; ref.; append.
  • Document available for consultation in the library of the IIR headquarters only.

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