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85 Energy Efficiency Measures

Divers Boissons Produits de boulangerie et farine Intersecteurs Viande et produits à base de viande Fruits et légumes Produits à base de poisson, crustacés et mollusques Aliments préparés pour animaux Légumes, huiles et graisses animales Produits à base de poisson, crustacés et mollusques Viande et produits à base de viande Produits laitiers Produits de minoterie, amidons et produits d'amidon Other food products Distilling, rectifying and blending of spirits Wine from grape Cider and other fruit wines Other non-distilled fermented beverages Manufacture of beer Manufacture of malt Manufacture of soft drinks; production of mineral waters and other bottled waters

Heat recovery from ventilation system

  • Catégorie: Cross-Cutting
  • Zone: Buildings
  • Sous-domaine: Ventilation
  • Effort de mise en œuvre :  
  • Potentiel d'économie :  

Air conditioning systems can consume considerable amounts of energy for conditioning air fed to the area of application, e.g. to adjust temperature or humidity levels. Energy recovery systems can help to partially recycle used air or the energy contained within. When making a choice on introducing such recovery system it is necessary to check on parameters such as their thermal efficiency, pressure losses and their behaviour with regard to fouling.

Waste-heat recovery from air compressor

  • Catégorie: Cross-Cutting
  • Zone: Processes
  • Sous-domaine: Compressed air
  • Effort de mise en œuvre :  
  • Potentiel d'économie :  

Air gets hot when compressed. Air compressors can therefore yield a considerable amount of heat. This heat is often simply dissipated to the environment. Yet, it can also be collected via a heat exchanger. Then, it can be used for heating (e.g. to support the heating system in winter) or to provide hot water (e.g. for sanitary purposes or for use in processes).

Acquiring energy-efficient compressors

  • Catégorie: Cross-Cutting
  • Zone: Processes
  • Sous-domaine: Compressed air
  • Effort de mise en œuvre :  
  • Potentiel d'économie :  

More recent compressors tend to operate more energy-efficiently than old compressor models. Checking on the performance of old compressors and replacing them, if necessary, can help to achieve energy savings.

Minimization of leakages

  • Catégorie: Cross-Cutting
  • Zone: Processes
  • Sous-domaine: Compressed air
  • Effort de mise en œuvre :  
  • Potentiel d'économie :  

Leakages are a major problem with regard to energy losses in compressed air systems. Insufficient maintenance and ageing of equipment can lead to air losses in the entire piping network. Depending on their size, such leakages are audible if they are sufficiently large or they can be found by using ultrasonic leakage detectors or other means. Regular leakage checks can therefore help to achieve considerable energy savings, especially in aged installations.

Replacing low-efficiency compressor drives

  • Catégorie: Cross-Cutting
  • Zone: Processes
  • Sous-domaine: Compressed air
  • Effort de mise en œuvre :  
  • Potentiel d'économie :  

Modern motor and drive systems for air compressors tend to achieve higher efficiencies than older drive equipment. In some cases, it can be beneficial for energy efficiency reasons to replace existing drive systems of air compressors by more recent technology.

Utilization of modern control systems

  • Catégorie: Cross-Cutting
  • Zone: Processes
  • Sous-domaine: Compressed air
  • Effort de mise en œuvre :  
  • Potentiel d'économie :  

Modern control systems allow to operate one or several compressors in such a way that allows the most energy-efficient control strategy. Installing such control systems can therefore help to minimize energy demand especially when several compressors are used to supply the same compressed air system.

Optimized compressed-air system design

  • Catégorie: Cross-Cutting
  • Zone: Processes
  • Sous-domaine: Compressed air
  • Effort de mise en œuvre :  
  • Potentiel d'économie :  

Compressed air system configurations evolve over time. This can lead to 'grown' systems with a mixture of various air supply equipment on the one hand and numerous compressed air users on the other hand. The former may operate outside optimal levels while the latter may have different requirements to pressure and air quality levels. The supply patterns might therefore not fit to the actual needs, which will result in energy losses due to excessive pressure levels, productivity losses due to performance drops in hand-held tools or compressors running outside of optimal configurations. A review of the system design can help to identify such misconfigurations and induce energy savings.

Avoidance of excessive air pressure losses

  • Catégorie: Cross-Cutting
  • Zone: Processes
  • Sous-domaine: Compressed air
  • Effort de mise en œuvre :  
  • Potentiel d'économie :  

Excessive pressure losses in compressed air piping will either lead to increased energy requirements at the compressors to compensate for these losses or in performance drops of the equipment. The identification and elimination of bottlenecks can therefore help to save energy.

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