The study presented here describes the geometry optimization of the Sea wave Slot cone Generator (SSG) overtopping wave energy converter as part of the feasibility study for the implementation of the device in the development plan of Hanstholm harbour in Denmark. The total length of the new planned breakwater is 1.5 km and the water depth ranges approximately from 8.0 m up to 14 m with localized influences on the wave climate. The study is conducted numerically in order to present the expected power production and overall performance of the SSG breakwater in Hanstholm. The price par kWh is also presented.


Hanstholm Harbour was first established in 1967 in a location (Fig. 1) considered quite challenging to construct a harbour due to the large wave forces. Hanstholm used to be a small town with only few houses, while the population increased concurrently with the new activities iniciated after the establishment of the harbour. The existing harbour has three primary industries: ferry service, cargo transportation and fishing industries. These three industries with about 2300 employees, provide work for a large amount of the population of Hanstholm. Fishing is the main industry of the harbour and around 80% of the fish here is then directed to the European markets. Hanstholm harbour today consists of two outer breakwaters and two cross going breakwaters, which purpose is to reduce the wave height in the inner harbour (Fig. 1). The outer breakwaters have a height of 2.2 m above the mean water level (MWL). The inner harbour consists of 8 basins and has a size of approximately 2.7 km2 and water depth varies between 3.9 m and 9.0 m. In Autumn 2008, Hanstholm Harbour initiated the preparation of a development plan involving a major expansion. While intending to maintain the status of Denmark's largest fishing port, a great amount of innovation will be also introduced.

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