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Reclaim energy by upgrading to new generation energy wheels

On average, the HVAC plant is responsible for 1/3 of a cruise ship’s total energy consumption.  Most air handling units onboard are therefore equipped with energy recovery wheels, which efficiently retrieve the energy from the ship’s exhaust air.  Over time the wheels get worn and the efficiency degrades significantly.  This results in increased energy consumption and, in worst case, the designed climate cannot be maintained onboard the ship.


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How can Callenberg Technology Group help?

Callenberg Technology Group offers a turn-key energy recovery wheel solution which not only reclaims once predicted energy consumption, but lowers it.  Our solution incorporates the new generation of SEMCO energy recovery wheels, developed by our partner Fläkt Woods.  With its new type of high efficiency coating, it can retrieve up to 80% energy.

Callenberg Technology Group guarantees and take full responsibility for the complete solution:

  • One point of contact
  • Survey of the existing installed equipment
  • Delivery of correct equipment based on survey
  • Installation and commissioning of equipment

The result is a highly energy efficient HVAC plant, reduced fuel costs and improved indoor climate for passengers.


How much energy & money can you save?

Callenberg Technology Group has successfully helped several clients change to the new generation energy wheels on their vessels.  Below is an example of savings can be achieved during certain circumstances:

Vessel type Cruise ship sailing in the Caribbean, age 15 years
Number of energy recovery wheels in the HVAC plant: 50
Average air flow at full speed from each air handling unit: 4 cu m per second
Reduction of air flow due to other energy conservation activities on board: 60%

BACKGROUND: Some of the energy recovery wheels onboard were original whilst others had been changed over the years. In common for the energy recovery wheels, besides that they were worn and some of them were not working at all, was that they had the previous generation of coating. As a result, the average energy recovery capacity was reduced to 60%.


By converting energy recovery wheels to wheels with the new generation of coating, the energy recovery efficiency increased to 80%. This translates into an annual saving of USD 250 000 as well as an improved indoor climate and fewer passenger claims.


The payback time including installation cost would be approximately one year. The total energy recovery from the energy recovery wheels would be USD 750 000 per year at optimal operation and maintenance.