HEAT TRANSFER IN GLASS MELTING FURNACES (ADVANCED TRAINING)

28 - 29 October 2025
14:00 - 17:30 CET
Eindhoven (NL) and/or Online

This course describes the fundamentals of heat transfer mechanisms in the combustion space, batch blanket, and glass melt. It focusses on radiative heat transfer in glass melts depending on the presence of the coloring ions and the redox state of the melt. The effects of new, emerging, sustainable furnace technologies, like hydrogen combustion and full electric melting on the heat transfer mechanisms are elucidated.

Contents
• Heat transfer in the combustion space:
– Flame emissivity
– Effect of soot
– H2-rich flames
• Heat penetration in batch:
– In flame furnaces
– In electric cold-top furnaces
– Effect of cullet type and content
• Heat transfer in glass melt
– Radiative heat transfer using a new model for predicting thermal radiation conductivity
– Convection in melting tanks

After the training you will:
• Estimate the impact of the nature and preparation of raw materials on the heat penetration in the batch blanket
• Assess the effect of glass chemistry, color, and redox on radiative heat transfer in the glass melt
• Evaluate the effects of furnace design on convective heat transfer with help of characteristic dimensionless numbers

Training methods
We offer a blended learning approach by mixing e-learning, lectures, open discussions, exercises, and case studies in teams or individually. The number of participants per course is between 8 and 20 to maximize your learning experience. Participants always receive the presentations and a training certificate.

Level of seniority
This training is meant for junior professionals to skilled professionals seeking to deepen their knowledge and understand the topic in detail.

Trainers
Sjoerd Stelwagen
Sjoerd Stelwagen studied Chemical Engineering at Eindhoven University of Technology. Directly after his study he started as a Technical Specialist at the Furnace department of Ardagh Glass in Dongen, The Netherlands, where he later became Batch and Furnace Manager. He then evolved as EHS manager for the Benelux plants. With more than 16 years of practical glass making experience, he joined Celsian in 2021 to work as a project manager and trainer.
Oscar Verheijen
Oscar Verheijen obtained his PhD from Eindhoven Technical University before joining TNO as a R&D project manager and business development manager of sustainable technologies. He is now R&D and training team leader at CelSian, Board member of the GlassTrend, member of the steering committee of the Dutch Glass Industry (NCNG) and represents the NCNG at European level.
Corinne Claireaux
Corinne Claireaux studied glass and materials chemistry in Rennes and obtained her PhD from the Sorbonne University in Paris in 2014. She worked as an internal trainer and R&D project leader for Saint-Gobain, improving or developing new glass formulations for different businesses and products (float, glass wool, glass-ceramics). She joined CelSian as a glass scientist and trainer in 2019.
Price Training costs € 1.200,- per participant.


Price excludes tax and duties.
The 6th participant from the same company can join for free.
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