Numerical simulation of open refrigerated display cabinets

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

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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.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Depositing User: epEditor USQ
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Electrical, Electronic and Computer Engineering
Date Deposited: 11 Oct 2007 00:24
Last Modified: 10 Sep 2013 05:24
Uncontrolled Keywords: refrigerated display cabinet; ambient; air; temperature
Fields of Research (FOR2008): 15 Commerce, Management, Tourism and Services > 1504 Commercial Services > 150401 Food and Hospitality Services
09 Engineering > 0915 Interdisciplinary Engineering > 091505 Heat and Mass Transfer Operations
09 Engineering > 0913 Mechanical Engineering > 091307 Numerical Modelling and Mechanical Characterisation
Socio-Economic Objective (SEO2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
URI: http://eprints.usq.edu.au/id/eprint/563

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