Douiri, Imen (2007) Pilote oven instrumentation for sponge cake baking. PhD thesis Génie des Procédés, AgroParisTech. UMR GenIAL, AgroParistech 2007AGPT0085 p.145.
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Abstract
BAKING OF CEREAL PRODUCTS CREATE PHYSICOCHEMICAL REACTIONS IN THE DOUGH CREATING THE STRUCTURE, THE TEXTURE , THE SHAPE, THE COLOUR AND TASTE OF THE FINAL PRODUCT. AN AIR CONVECTIVE ELECTRICAL PILOT OVEN WAS INSTRUMENTED TO CONTROL ON-LINE THE BAKING OF A SPONGE CAKE PRODUCT (700G) IN A SPECIAL MOULD: WEIGHT LOSS, INTERNAL TEMPERATURE PROFILE AND SURFACE TEMPERATURE, INTERNAL PRESSURE; THROUGH A GLASS WINDOW IN THE ISOLATED LATERAL SIDE OF THE MOULD, IMAGES WERE TAKEN TO FOLLOW THE PRODUCT HEIGHT VARIATION. THE EVOLUTION OF DENSITY ALONG BAKING WAS CALCULATED. RADIATIVE AND CONVECTIVE HEAT FLUX MEASUREMENTS WERE USED TO EXPLAIN THE SURFACE COLORATION AND THE SHAPE OF THE BAKED CAKE. TRIALS WITH AIR TEMPERATURES OF 160, 180, AND 220 °C WERE PERFORMED WITH A CONSTANT WEIGHT LOSS OF 6% (WATER) DURING THE HEATING PERIOD, CORRESPONDING TO DIFFERENT HEATING DURATIONS OF 81, 71, AND 52 MIN RESPECTIVELY. DURING THIS PERIOD THE DOUGH WAS TRANSFORMED IN THE DRY COLOURED CRUST AND STILL HUMID CRUMB. THE CONTROLLED COOLING PERIOD WITH BLOWING OF COLD AIR (90 MIN) REPRESENTED, WITH AN ADDITIONAL WEIGHT LOSS OF 6%, AN IMPORTANT CONTRIBUTION TO STABILIZE THE STRUCTURE.
| Item Type: | PhD Thesis (PhD) |
|---|---|
| PhD Supervisor: | Dumoulin, Elisabeth |
| Date: | 31 January 2007 |
| Board of examiners: | Pain, Jean-Pierre and Abecassis, Joël and Isambert, Arsène and Dumoulin, Elisabeth and Sommier, Alain and Vignolles, Marc |
| Ecole Doctorale: | ED 435 AGRICULTURE, ALIMENTATION, BIOLOGIE, ENVIRONNEMENTS ET SANTE |
| Discipline: | Génie des Procédés |
| Collection (Fonds): | AgroParistech |
| Institution: | AgroParistech |
| Department: | AgroParisTech. UMR GenIAL |
| Subjects: | 7. Life Sciences and Engineering |
| Uncontrolled Keywords: | Baking, Cuisson, Sponge cake, Génoise, Instrumentation, Instrumentation, Image analysis, Analyse d'image, Density, Masse volumique, Cooling, Refroidissement, Oven, Four |
| ID Code: | 4531 |
| Deposited By: | Agnès Grimal |
| Deposited On: | 13 January 2009 |
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