Company

Waste heat recovery - energy recovery that is so efficient that even the local heating network can be supplied.

The goal:

• The most efficient recovery of unused waste heat from production operations
• Utilisation of the waste heat for heating buildings
• Use of the waste heat to preheat the boiler feed water
• Feeding the energy surplus into the local heating network of the municipality of Lauterach all year round 

Our solution:

• Installation of a hot water buffer tank with 30,000 litres in the boiler house
• Waste heat recovery from production water in the form of pumped hot water used for heating purposes
• Expansion of the use of compressor waste heat
• Utilisation of waste heat from production exhaust air thanks to the recovery of pumped hot water

The data:

The savings potential:

• Recovery of 2,160 MWh per year with regard to waste heat from the production water
• Recovery of 950 MWh per year from the preheating of boiler feed water
• Recovery of 250 MWh per year with regard to waste heat from compressors
• Recovery of 1,520 MWh per year from waste air due to production
• Annual CO₂savings of 472 t

The economic potential:

• Savings of 2,487 kWh natural gas per year 
• Supply of 1.2 GWh into the local heating network of Lauterach in year-round operation