Abstract: A seal assembly for arrangement between a first and a second photovoltaic panel is disclosed. The first and the second photovoltaic panel each includes an upper layer and a lower layer, wherein the upper layer is offset with respect to the lower layer at first and second side edges, such that the upper layer of the first photovoltaic panel at its second side edge partially overlaps the lower layer of the second photovoltaic panel at its first side edge. The seal assembly include an upper abutment part, a lower abutment part, and an intermediate part connecting the upper abutment part with the lower abutment part and configured for being arranged between the upper layer of the first photovoltaic panel and the lower layer of the second photovoltaic panel. Also, arrays of solar panels and roof structures including such seal assemblies are disclosed.

Abstract: A runner for a Pelton turbine having a runner hub and a plurality of buckets which in each case have one bucket root. Each bucket is mounted on the runner hub with the bucket root and each bucket includes a cavity which encloses an area configured in such a manner that they passively counteract an occurring bucket oscillation. Where at least one body is movable in respect to cavity.

Abstract: The invention relates to a Pelton turbine comprising a blade wheel which carries a number of Pelton buckets on its circumference; comprising two or more nozzle bodies for applying a water jet to the Pelton buckets; a guide wall which is annular in relation to the rotational axis and is provided for discharging spray water is disposed on each side of the blade wheel and radially outside of the Pelton buckets; the guide wall comprises openings for accommodating one respective nozzle body; each nozzle body extends with its orifice at least up to the inner radius of the guide wall.