5) Ovens
LABTUCAL has been working since 2001 in both design and conversion of baking ovens employing the thermosyphon technology. The thermosyphons transfer heat from the combustion chamber to the baking chamber with great efficiency. The combustion chamber could burn either petroleum gas or any other fuel and it is usually located at the bottom of the oven. The baking chamber is located at the top of the oven. The combustion and baking chambers are separated apart from one another in order to avoid combustion gases from contaminating the food being baked. The conventional ovens usually transfer heat through natural convection, which is not very efficient. In addition, the temperature distribution in the baking chamber is much more uniform in an oven with two-phase thermosyphons. This technology is being developed in cooperation with oven industries. LABTUCAL is responsible for the designing and the manufacturing of the thermosyphons, as well as for the entire system thermal control. The industry partners build the ovens according to the LABTUCAL design and attach the thermosyphons built in the laboratory to the ovens.
5.1) Bakery ovens
5.2) Pizza ovens
5.3) Continuous ovens (biscuits)
Publications: MILANEZ, F. H.; MANTELLI, M. B. H. Thermal Characteristics of a Thermosyphon Heated Enclosure. International Journal of Thermal Sciences, v. 45, p. 504-510, 2006.
MILANEZ, F. H.; MANTELLI, M. B. H. Analytical Model for Thermal Performance Analysis of Enclosure Heated by Aligned Thermosyphons. Journal of Thermophysics and Heat Transfer, v. 20, n. 2, p. 267-275, 2006.
SILVA, A. K.; MANTELLI, M. B. H. Thermal applicability of two-phase thermosyphon in cooking chambers - experimental and theoretical analysis. Applied Thermal Engineering. v. 24, p. 717-733, 2004.
MANTELLI, M. B. H.; MILANEZ, F. H.; MARTINS, G. J. M.; ZIMMERMMAN, R.; SILVA, C. N. Termossifões em Árvore Aplicados a Fornos de Cocção de Pães: Maior Eficiência Energética. In: 1º Seminário da Rede Gás & Energia, 2006, Rio de Janeiro, 2006.
MILANEZ, F. H.; MANTELLI, M. B. H. Thermal Performance Theoretical Prediction of an Enclosure Heated by Aligned Thermosyphons. In: 43th Aerospace Sciences Meeting and Exhibit, 2005, Reno, 2005.
MANTELLI, M. B. H.; MILANEZ, F. H.; NIELITZ, G. Tree Configuration Thermosyphon Study. In: AIAA 38th Thermophysics Conference, 2005, Toronto. AIAA 2005 - 4953, 2005.
MILANEZ, F. H.; MANTELLI, M. B. H. A New Methodology for Measuring Heat Transfer Coeficients-Application to Thermosyphon Heated Enclosures. In: 13th International Heat Pipe Conference, 2004, Shanghai, 2004.
MANTELLI, M. B. H.; LOPES, A. A.; MARTINS, G. J. M.; ZIMMERMANN, R.; BAUNGARTNER, R.; LANDA, H. G. Thermosyphon Kit for Conversion of Electrical Bakery Oven to Gas. In: 7th International Heat Pipe Symposium - 7th IHPS, 2003, Jeju - Coréia.
