Float glass production technology waste heat recovery

Waste heat recovery - a green approach

Float glass production

Two of the glass industry’s key challenges include cutting energy consumption during consumption and minimizing the level of CO2 emissions. We offer a cutting-edge, waste heat recovery system for glass plants so that you can achieve climate targets and ensure you receive your operating licenses in the future: A waste heat recovery system for glass plants that operates at the highest level. 

Heat is an asset. You should make it earn interest.

The problem: during the glass melting process, much of the energy in the exhaust gas from the glass melting tanks is lost. WHR systems use this waste heat to generate electrical power, as well as heat and cooling energy for process and air-conditioning purposes.

This leads to a significant increase in energy efficiency, an improvement in the climate protection balance due to avoided C02 emissions, and considerable cost savings by reducing the amount of electricity and fossil fuel that has to be purchased.

Overview of benefits

Achievement of climate goals

The European glass industry has committed itself to reducing CO2 emissions by over 20% by 2030, and the political pressure to achieve this goal will be even stronger in the future. WHR plants from Grenzebach can make a real contribution here on the basis of a proven, controlled technology. They offer the highest efficiency, the highest electrical power generation rates and outstanding availability under almost all operating conditions.

Cost savings

WHR plants generate electricity and, if required, heat and cooling energy. The consequent reduced need to buy energy leads to significant cost savings. Incredible but true: the use of our WHR systems on standard glass melting tanks enables the generation of all the electrical energy required to operate the flat glass production line!


System integration and facility performance

Our WHR systems are exclusively equipped with proven technology derived from power plant construction. Their smart integration into the production process means that the glass manufacturing process remains almost unaffected. Furthermore, there is a chance to achieve additional benefits by reducing operating or investment costs for peripheral equipment.

“Climate protection and energy efficiency are huge issues for the glass industry and gaining momentum due to legislation and companies’ own targets. Waste heat recovery can be implemented today, even if the whole plant may be operated with hydrogen in the future. We’re developing agile solutions for the real world each and every day.”


Statement Dennis Schattauer on waste heat recovery
Dennis Schattauer Senior Sales Manager Turnkey/Hot End Glass at Grenzebach Maschinenbau GmbH
Process of waste heat recovery systems

The process

Waste heat recovery (WHR)

Based on controlled and proven technology, waste heat recovery plants enable improvements in energy efficiency and the reduction of resource consumption. The solution from Grenzebach stands out from other systems on the market due to its particularly high efficiency for power generation, which can be 35 percent or more. The WHR system uses the available thermal energy in the melting tank exhaust gas to produce steam at pressures up to 90 bar by integrating heat exchanger boiler systems into the exhaust gas flow. The steam is fed to the highly efficient turbine/generator unit to generate electrical energy.

Service for the glass industry

Partnership and service that go the extra mile.

Our service for the glass industry

Construction and commissioning of a new glass production line is only the first stage in a good customer relationship. Professional service in daily operation is just as important: We want your investment to be profitable without any interruption – that’s why our engineers are there for you with guidance and support over the entire life cycle of the plant.

We Service

Technology & equipment

Float glass production

For North America

Your contact person: Ron LaBorde

You would like to know what Grenzebach glass solutions can do for you? Call or write us about your challenge. We look forward to hearing from you!

We are here for you

Your contact person: Dennis Schattauer

Collaboration means dialogue. We support you no matter where you are in the world. Contact us. Send us your enquiry.

Dennis Schattauer Grenzebach