The region Emsland is not only said to be the centre of the German oil industry but also is a traditional power plant site. Within only a few kilometres around the city of Lingen, you'll find a decommissioned and an active nuclear plant as well as the natural gas power station Emsland containing three active units. As recently as 2009 the newest unit, a combined cycle power plant, was completed. The power plant has a net efficiency of 59,2 %. Additionally, it provides industrial customers with up to 100 tons of process steam per hour.
Natural Gas Power Station Emsland
Cooling Tower
| Customer |
Züblin |
| Crane operation |
02 till 07/2008 |
| Hook height | 112–160 m |
| Radius | 42 m |
| Foundation |
Foundation anchor |
| Special features |
Larger than usual tower elements for the lower part of the tower in order to increase stability |
The power plant
The task
The corresponding cooling tower of the newest unit was planned as a natural draft cooling tower. In order for the natural draft effect to be strong enough, this type of cooling tower has to be at least 100 m high. In this case, a building height of 123 m consisting of 75 casting sections of 1.5 m height was planned. The crane had to reach the required hook height of up to 160 m without any stays attached to the building.
The implementation
A luffing jib crane like the WT 205L e.tronic used in this case is flexible concerning the hook height because of the movable jib. Therefore, it has a major advantage in comparison to trolley cranes. Placed on top of a 112 m tower, the crane in this specific setup was able to reach a hook height of up to 160 m through a 42 m jib – more than enough for this natural draft cooling tower.
As connections to the building were to be avoided, the lower part of the tower was constructed out of tower elements with a lateral length of 3.33 m. In addition to that, the tower was fastened to the ground by special stays. Our standard tower elements were sufficient for the upper part of the tower. This way, we were able to play to the strengths of our flexible modular system.
As connections to the building were to be avoided, the lower part of the tower was constructed out of tower elements with a lateral length of 3.33 m. In addition to that, the tower was fastened to the ground by special stays. Our standard tower elements were sufficient for the upper part of the tower. This way, we were able to play to the strengths of our flexible modular system.
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