Abstract: A plant for utilizing the energy in the waves which are present at a given time in a section of a water area, such as an ocean or a lake. The plant comprises a base located in this section and in the shape of a platform or raft and a wave converter placed on the base and serving for transforming the wave motion of the water into whirling motion. The plant furthermore comprises a number of adjacent wave catches each having at least one catch plate for catching at least part of the water of the waves and making this water flow down along the catch plate from a top front edge to a bottom rear edge on the plate, and a whirl pipe for each wave catch for, via a slot extending along the rear edge of the at least one catch plate, taking up the water flowing along the catch plate so that this water will describe a whirling motion in the whirl pipe. The plant can utilize the average energy in the waves better and with less construction costs than known so far.

Abstract: A method for impelling water in e.g. a lake by with a pump transforming the waves of the lake into whirling water which is sent down towards the bottom of the water area. The pump comprises a horizontally extending whirl pipe with a longitudinal slot and at least one preferably curvedly extending baffle with a top front edge mainly facing a wave front in the lake in operation and a bottom rear edge extending along the slot. Both ends of the whirl pipe are fluid-connected to a submersible pipe extending down towards the bottom of the water area. The pump is simple and reliable as it functions without movable parts. The pump can without costs for external energy take surface water high in oxygen and atmospheric air down to enrich “dead” bottom water low in oxygen. At the same time the pump can advantageously be used for removing undesired constituents such as superfluous biomass from the lake and add desired additives such as lime to this.