ENERGY EFFICIENCY IMPROVEMENT
OF DIFFERENT GLASS FURNACE TYPES AND
ENERGY BENCHMARKING OF GLASS FURNACES
J.A.C. van Limpt, R.G.C. Beerkens
TNO Glass Group, P.O. Box 595, 5600 AN Eindhoven, the Netherlands
Phone: +31 40 2650264, E-mail: firstname.lastname@example.org
This paper will present the course of energy efficiency improvements for glass
melting processes in the last century. Most improvements are caused by improved
refractory materials allowing better insulation, up-scaling of furnaces with also
pull rates, higher levels of glass recycling and improved production efficiency.
The energy distribution in glass furnaces has been analyzed with energy balance
models. With such models the impact of cullet fraction in batch, air preheating, design
of the furnace, type of glass, selection of raw materials, pull rate and so forth on the
energy consumption can be predicted. Results are given here.
Recent energy saving measures in the EU glass industry are reviewed, the measures
include novel furnace designs, application of all oxygen firing and the use of batch
preheating systems. From the analysis of energy consumption data of glass furnaces
obtained in a benchmark study in 1999 and based on energy balance models for
glass furnaces, the most energy efficient glass furnaces today are identified.
The energy consumption levels of different existing and possible furnace designs
have been derived and are presented during this presentation. The paper also
includes an evaluation of novel furnace designs and attempts for new melting
concepts will be discussed with regard to their feasibility and energy saving potential.