Numerical simulation of open refrigerated display cabinets

Paper

Mossad, Ruth, Schillak, Thomas and Malli, Mike. 2005. "Numerical simulation of open refrigerated display cabinets." 3rd International Conference on Energy Research and Development (ICERD-3). Kuwait City, Kuwait 21 - 23 Nov 2005 Kuwait.
Paper/Presentation Title

Numerical simulation of open refrigerated display cabinets

Presentation TypePaper
AuthorsMossad, Ruth (Author), Schillak, Thomas (Author) and Malli, Mike (Author)
Journal or Proceedings TitleProceedings of the 3rd International Conference on Energy Research and Development (ICERD-3)
Journal Citation2, pp. 395-404
Number of Pages10
Year2005
Place of PublicationKuwait
Conference/Event3rd International Conference on Energy Research and Development (ICERD-3)
Event Details
3rd International Conference on Energy Research and Development (ICERD-3)
Parent
International Conference on Energy Research and Development
Event Date
21 to end of 23 Nov 2005
Event Location
Kuwait City, Kuwait
Abstract

Open refrigerated display cabinets are becoming more widespread since they are believed to enhance sales by providing easy access to the chilled products. Air
curtains are used as a barrier between the warm ambient air and the chilled compartment of the fridge. The effectiveness of the air curtain depends on many parameters. The objective of this work is to study the effect of jet velocity, turbulence intensity and temperature on the performance of a commercial refrigerated display cabinet aiming at minimizing energy usage. A 2-D numerical model suing double precision was solved using the computational software 'Fluent' that include the full buoyancy effect and radiation between surfaces. Results include temperature variations, estimation of the entrainment of air into the fridge and heat exchanged with the ambient air in the room. The numerical results indicate that jets with lower velocities at colder temperature enhance the efficiency of the open fridge. A reduction of 19.5 percent in the air entrainment and 23 percent in the heat gain was observed in comparison with the current setting. Temperature measurements and flow visualization using smoke were conducted to validate the numerical simulation.

Keywordsrefrigerated display cabinet; ambient; air; temperature
ANZSRC Field of Research 2020350401. Food and hospitality services
401205. Experimental methods in fluid flow, heat and mass transfer
401706. Numerical modelling and mechanical characterisation
Byline AffiliationsDepartment of Mechanical and Mechatronic Engineering
Karlsruhe University of Applied Sciences, Germany
Orford Refrigeration, Australia
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