Heat Recoveryfrom flame treatment ovens at Danish Crown

Key Technical Data:
  • Efficient use of waste heat to reduce primary energy consumption
  • Optimization of heating and domestic hot water supply through stratified storage tanks
  • Sustainable reduction of operating costs through heat recovery
  • Installation of an exhaust gas heat exchanger with a capacity of 1.500 kW

At Danish Crown in Essen (Oldenburg), a heat recovery system (HRS) with heating water storage was integrated as part of an efficiency improvement initiative to reduce primary energy consumption. The recovered waste heat is used to heat cleaning water and to support the heating system.

These measures enhance energy efficiency, reduce operating costs for hot water generation, and contribute to more sustainable production.

Key Project Measures

  • Installation of an exhaust gas heat exchanger (EGHE) to utilize waste heat from the flame treatment ovens (temperature range: 350–450 °C)
  • Integration into a heating water system with usable water temperatures of up to 95 °C
  • Storage of waste heat in two 100 m³ stratified tanks to decouple heat supply and demand
  • Hydraulic separation for heating cleaning water up to 65 °C
  • Return temperature increase for the heating system up to 90 °C
  • Utilization of additional waste heat from the oil cooling of the ammonia refrigeration system to raise the EGHE supply temperature
  • Supply of a 20 bar high-pressure cleaning network and a 6 bar low-pressure cleaning network
  • Heat extraction
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