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Ratgeber

Intelligent compressed air Made in Germany

The economical, energy-optimised supply of compressed air is an important production and profit factor for your company and it enhance its competitiveness.

Heat distribution

Save energy easily and enjoy financial benefits quickly

The energy consumed for the generation of compressed air is converted almost entirely to heat.
This is a high potential for savings since one compressed air station with a power requirement of 75 kW during 4000 operating hours, for example, will need approximately 300,000 kWh of power every year.

Use this energy in the form of:

  • Warm air to supplement space heating
  • Warm water to support central heating
  • Warm water for industrial water
Heat recovery

How big are your potential savings?

By way of the example, below you can see an overview of the energy saving potential of the compressors depending on the respective installed rated outputs.

Examples of potential energy savings

Have your own savings potential calculated by ALMiG!

Example types of use for profitable heat recovery

Acceptable level for the temperature: 20–25 K above ambient temperature

Hot air forthe room heating

The heated cooling air is used to heat a room via a ductwork system. Temperature controlled valves achieve a regulated, adjustable room temperature. In winter the heat from the exhaust air is used entirely or partly for heating purposes. In the summer it is blown out into the air via an exhaust air channel.

Acceptable hot water temperature: up to 70° C

Hot water for heating purposes

Plate heat exchangers are used to produce hot water.The heating water runs through “plates” within a closed housing. The hot compressor oil flows between plates and housing and delivers its heating power to the hot water.

Acceptable service water temperature: up to 70° C

Heat for serviceand process water

The heat recovery process is the same as for heating water. Shell-and-tube heat exchangers are used to prevent oil from penetrating the service water even if there are leaks.

We can offer you three alternative ways of saving money!

Available for compressors: 15–355 kW

Integrated heat recovery

All components required for heat recovery are installed in the compressor during the production process.

Advantage:   

  • Simply connect up in the building and immediately start saving cash!
  • Constant temperature regulation: Depending on the available heat, the water temperature on the customer’s side will be kept at the desired temperature level.
Available for compressors: 15–355 kW

Preparation for heat recovery

If the order is for a new compressor, it will be prepared for heat recovery, i.e.:

  • ball valves on the oil tank outlet
  • The space needed for heat exchangers etc. has been allowed for in the plant.
  • The apertures for the connections have already been predrilled into the panelling.
  • It can be completed at no expense at a later date by using a retrofitting set; this entails:
    • Heat exchanger
    • Control valve + temperature sensor
    • Hose connector / pipe coupling
Available for compressors: 4–355 kW
External modules for retrofitting previously installed compressors

Heat recovery for (old) compressors previously installed

External modules for retrofitting previously installed compressors.

Advantage:

  • Easy to connect to all compressors
  • Fully equipped with all the necessary, highly efficient components and safety devices
  • Minimal installation costs thanks to the intelligent ALMiG design
  • Constant temperature regulation
* Effective volume of usable heat at 75 % heating efficiency
** Speed-controlled compressors: Values refer to an average 70 % capacity utilisation.