Have you got MONEY to give away?

No? Then don’t waste valuable energy. The heat recovery of your screw compressor offers you considerable savings potential.

Did you know that the energy consumed for producing compressed air is all converted into heat?

The heat diagram on the right shows the amount of heat that arises in oil-injected screw compressors.

Hard facts:

Recover this energy in the form of:

• hot air to support the space heating
• hot water to support, for example, the central heating or for process water

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.

Have your own savings potential calculated

by ALMiG!

Example types of use for profitable heat recovery

Hot air for
the  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.

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.

Heat for service
and 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!

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.

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 pre-drilled 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

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