Heat transfer and heating rate of food stuffs in commercial shop ovens

The CFD analysis of flow and temperature distribution in heating ovens used in bakery shop, to keep the foodstuffs warm, is attempted using finite element technique. The oven is modelled as a two-dimensional steady state natural convection heat transfer problem. Effects of heater location and total heat input on temperature uniformity of foodstuffs are studied. Placing the heater at the bottom of the oven improves the air circulation rate by 17 times and 10 times than that at the top and side of the oven. But the top location provides better uniformity in foodstuff temperature than the other cases. Side location is not preferable. In the present ovens, the heating elements are located at the top. The analysis shows that if heaters are located at the bottom along with additional flow guidance arrangements, energy efficient oven configuration can be obtained.

[1]  Da-Wen Sun,et al.  Applications of computational fluid dynamics (cfd) in the food industry: a review , 2002 .

[2]  H. Muhr,et al.  CFD simulation of precipitation in the sliding-surface mixing device , 2001 .

[3]  M. Farid,et al.  Thermal sterilization of canned food in a 3-D pouch using computational fluid dynamics , 2001 .

[4]  Vassilis Belessiotis,et al.  Simulation of air movement in a dryer by computational fluid dynamics : Application for the drying of fruits , 1998 .

[5]  Q. Pham,et al.  A multi-layered two-dimensional finite element model to calculate dynamic product heat load and weight loss during beef chilling , 2000 .

[6]  Peter Richards,et al.  Numerical simulation of natural convection heating of canned food by computational fluid dynamics , 1999 .

[7]  Kostadin Fikiin,et al.  Numerical simulation of unsteady heat conduction in arbitrary shaped canned foods during sterilization processes , 1994 .

[8]  Shyam S. Sablani,et al.  Neural networks for predicting thermal conductivity of bakery products , 2002 .

[9]  Sture Holmberg,et al.  Energy savings and thermal comfort with ventilation radiators : a dynamic heating and ventilation system , 2007 .

[10]  David F. Fletcher,et al.  Spray drying of food ingredients and applications of CFD in spray drying , 2001 .

[11]  A. A. Teixeira,et al.  Numerical Modeling of Natural Convection Heating in Canned Liquid Foods , 1987 .

[12]  M Orme,et al.  Energy and ventilation , 1998 .

[13]  Jyeshtharaj B. Joshi,et al.  CFD modelling and mixing in stirred tanks , 1999 .