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Advances in Heat Transfer Engineering

ISSN:
1-56700-198-1 (Print)

HEAT TRANSFER IN GLASS TEMPERING AND FORMING PROCESSES

Reijo Karvinen
Tampere University of Technology, Korkeakoulunkatu 6 P.O. BOX 589,FI-33101 Tampere, Finland

Mikko Rantala
Tamglass Engineering Ltd. Oy, Tampere, Finland

Tarmo Pesonen
Tamglass Engineering Ltd. Oy, Vehmaistenkatu 5, 33730 Tampere, Finland

Abstract

Glass processing, i.e. tempering, bending, and laminating, is done by heating and cooling the glass. Different types of heat transfer phenomena are coupled together in a lime-dependent process. In the paper, the principles of different processes are shown and the most important theoretical aspects are discussed. The main goal has been to show the connection between conduction, convection, and radiation in a semitransparent medium. The usefulness of numerical modeling in process control and machinery design is pointed out and some trends in the field are discussed on the basis of authors' experience in research.