Partner
  • VW-Coaching GmbH
  • Pfleiderer-Institut für
    Strömungsmaschinen
    der TU-Braunschweig
  • Harzwasserwerke GmbH
05/2004
design by l-tobe-l
animation by smund

Test TU Braunschweig / FU Berlin

Download of the power-estimation of the TU-Braunschweig for the large realization of an Atlantisstrom tidal power plant.

Comparison of the power measurements at the Pfleiderer-Institute in the blocked channel (measurement Dwinger) with the one in the deepwater towing-channel Berlin and the performance accounting from the research paper by Stremlau.

In 2002 a computer aided research paper for performance accounting was performed at the Pfleiderer-Institute with an Atlantisstrom tidal power plant with a 8m diameter and 20m length.
The results are shown by the graph "Theorie (Stremlau)".

In december 2008 the performance of an Atlantisstrom prototype with a 1m diameter and 1m length was measured at the TU-Braunschweig in a blocked channel and projected to an Atlantisstrom tidal power plant with the same size as the one in the research paper (20m length, 8m diameter)
The results are shown by the graph "Messung PFI (Dwinger)".

In august 2009 the prototype mentioned above was tested and measured in the 8m wide and 4m deep towing-channel for its output. The results were also projected to a tidal power plant with 20m length and 8m diameter.
They build the graph "Messung Berlin".

If you compare the three graphs you see that after the theoretical research paper of Stremlau, a tidal power plant with a diameter of 8m and a length of 20m would create only 25 kW at a current velocity of 2m/sec

The measurement in the towing-channel Berlin resulted in 70 k/W of power with the same current velocity (2m/sec) and the same projection of the measured data to a rotor with 8m diameter and 20m length.

The measurement in the blocked* channel at the TU-Braunschweig resulted in a projected performance of over 200 k/W at a current velocity of 2m/sec and a rotor of the same size mentioned above.

The measurements mentioned above show that the performance depends on the blocking of the current by the tidal power plant.

With a strong blocking as at the TU-Braunschweig and a tidal power plant with 8m diameter and 20m length a performance like the one shown in "Messung PFI (Dwinger)" would be expected.

With a less strong blocking and a current velocity as in the towing-channel Berlin a performance like the one shown in "Messung Berlin" would be expected.


Conclusion:

The projection of the measurements proves that our tidal power plant produces several times of the performance that was assumed so far and consequently have got the best cost effectiveness of all tidal power plants.

*Blocking: If the tidal power plant is positioned in a way, that only a little bit of water can flow past on the left and the right site of the power plant, people speak about a strong blocking. If the tidal power plant is for example positioned in a wide fjord a lot of water can flow past the left and the right site of the power plant and people speak of a slight blocking.


Pictures of the tests in the deepwater towing-channel Berlin.

Pictures of the tests in the blocked channel at the Pfleiderer-Institut (Dwinger).