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District Heating - Case Study
Courtesy of Airwatergreen AB
We want to offer a safe workplace!
The network, which consists of a total of 105 miles, is from 1965 and thus one of the oldest in Sweden. Several studies have come to the conclusion that the best way to get away from problems such as corrosion would be to remove the chambers where the problems and risks are greatest, but because of the high maintenance costs, there is no economy for this. - It is a step 22. The money we needed to build the chambers has been used to maintain them, Mats explains.
Solution: Since March 2016, the district heating chambers are protected by air dehumidifiers built on hot condensation, which has reduced the amount of moisture in the air, so that the corrosion processes have stopped.
The critical limit for corrosion is at 60% relative humidity. If you keep the spaces under it then the corrosion stops, explains Airwatergreen`s research and development manager Fredrik Edström.
Kraftringen and Airwatergreen designed the service "Dry climate". This means that Kraftringen transfers the responsibility for the climate in the chambers of the Airwatergreen for a fixed monthly cost. - This means that we do not have to bind any capital. We receive an invoice every quarter and the Airwatergreen handles the rest. In addition to lowering the humidity, the Airwatergreen provides us with data on how the chambers feel, which simplifies the planning of the maintenance, says Mats.
He also emphasizes that those who work in the chambers have a better working environment.
It`s not just about the maintenance money we save on this. We want to offer a safe workplace for the employees who are down in these chambers daily - something we have now succeeded with thanks to "Dry climate"!
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