Abstract: The present invention provides a wind turbine comprising a lightning protection system for providing an electrical conduction path suitable for conducting lightning from the rotor to electrical ground. The lightning protection system comprises a shroud which is electrically coupled to a wind turbine bearing housing and a wind turbine hub and/or the front end of the main shaft. The shroud forms part of the electrical conduction path so to electrically couple a wind turbine rotor to the bearing housing via a short circuit path that bypasses the bearing arrangement.

Abstract: The present invention provides a wind turbine comprising a lightning protection system for providing an electrical conduction path suitable for conducting lightning from the rotor to electrical ground. The lightning protection system comprises a shroud which is electrically coupled to a wind turbine bearing housing and a wind turbine hub and/or the front end of the main shaft. The shroud forms part of the electrical conduction path so to electrically couple a wind turbine rotor to the bearing housing via a short circuit path that bypasses the bearing arrangement.

Abstract: A device for purifying liquids by distillation includes a first and a second evaporation section, and a first and a second condensation section, where each evaporation section includes a liquid inlet and a vapor outlet and each condensation section includes a vapor inlet and a liquid outlet, the first evaporation section and the second condensation section being in vapor connection through the first evaporation section outlet and the second condensation section inlet, wherein the first evaporation section is in thermal contact with the first condensation section, and the second evaporation section is in thermal contact with the second condensation section, wherein the sections in thermal contact are separated by a non-permeable polymer membrane. The device is compact and efficient in the production of a distillate product.

Abstract: An apparatus for production of steam from an aqueous liquid includes (a) a solar panel with a pliable, essentially impermeable, polymer membrane having an outer surface and an inner surface, wherein the outer surface is adapted to be directed towards the sun; a lattice structure adapted to support the inner surface of the polymer membrane; a backing, which together with the pliable polymer film, encases the lattice structure; an inlet for the aqueous liquid; an outlet for the steam produced, and (b) means for providing a vacuum connected to the outlet. The apparatus can be produced with few and relatively simple components thereby reducing the cost of the apparatus.

Abstract: A lightning current transfer unit for a wind turbine, the wind turbine comprising a first part and a second part being rotatable relative to each other, wherein the lightning current transfer unit is arranged to provide electrical contact between the first and second parts, the lightning current transfer unit comprising: a first current transfer portion comprising a first slider and configured to be electrically coupled to a first electrically conducting slideway of the first part of the wind turbine, the first slider being rotatable relative to the first slideway; a second current transfer portion configured to be electrically coupled to an electrically conducting portion of the second part of the wind turbine; a first main spring biasing the first slider towards the first slideway; wherein the first slider comprises: a primary contact biased towards the first slideway by the first main spring; a secondary contact arranged to move relative to the primary contact; and a secondary spring arranged between the f

Abstract: A device for purifying liquids by distillation includes a first and a second evaporation section, and a first and a second condensation section, where each evaporation section includes a liquid inlet and a vapor outlet and each condensation section includes a vapor inlet and a liquid outlet, the first evaporation section and the second condensation section being in vapor connection through the first evaporation section outlet and the second condensation section inlet, wherein the first evaporation section is in thermal contact with the first condensation section, and the second evaporation section is in thermal contact with the second condensation section, wherein the sections in thermal contact are separated by a non-permeable polymer membrane. The device is compact and efficient in the production of a distillate product.

Abstract: An apparatus for production of steam from an aqueous liquid includes (a) a solar panel with a pliable, essentially impermeable, polymer membrane having an outer surface and an inner surface, wherein the outer surface is adapted to be directed towards the sun; a lattice structure adapted to support the inner surface of the polymer membrane; a backing, which together with the pliable polymer film, encases the lattice structure; an inlet for the aqueous liquid; an outlet for the steam produced, and (b) means for providing a vacuum connected to the outlet. The apparatus can be produced with few and relatively simple components thereby reducing the cost of the apparatus.

Abstract: The present invention relates to a lightning current transfer system (100) adapted for usage in a wind turbine (W) having a hub (20) that is rotatably supported relative to a generator in a nacelle (30) and a plurality of blades (10) that are pivotably connected with the hub, wherein the hub (20) is covered by a spinner (20A). The lightning current transfer system (100) comprises a blade band (10A) mountable to the root of the blade (10); a lightning ring (80) mountable to the spinner (20A) facing the nacelle (30); a first contact device (70) mountable to the spinner (20A) adapted for providing lightning current transfer from the blade band (10A); a connecting device (75) for connecting the first contact device (70) with the lightning ring (80); and a second contact device (30B) mountable to the nacelle (30) and adapted for providing lightning current transfer from the lightning ring (80) to ground.

Abstract: A lightning current transfer unit for a wind turbine, the wind turbine comprising a first part and a second part being rotatable relative to each other, wherein the lightning current transfer unit is arranged to provide electrical contact between the first and second parts, the lightning current transfer unit comprising: a first current transfer portion comprising a first slider and configured to be electrically coupled to a first electrically conducting slideway of the first part of the wind turbine, the first slider being rotatable relative to the first slideway; a second current transfer portion configured to be electrically coupled to an electrically conducting portion of the second part of the wind turbine; a first main spring biasing the first slider towards the first slideway; wherein the first slider comprises: a primary contact biased towards the first slideway by the first main spring; a secondary contact arranged to move relative to the primary contact; and a secondary spring arranged between the f

Abstract: The invention generally relates to a blade for a wind turbine, and to a blade for a wind turbine comprising a lightning measurement system. In particular, a lightning measurement system is provided, comprising a lightning current sensor located in the blade for more accurate lightning measurements. A method of measuring a lightning strike is also provided.

Abstract: A lightning current transfer unit (100) for a wind turbine, the lightning current transfer unit (100) comprising a first portion (20a) configured to be electrically coupled to an electrically conducting portion of a blade of a wind turbine electrically connected to a down conductor of the blade and a second portion (20b) configured to be electrically coupled to an electrically conducting portion of a nacelle of the wind turbine connected to a down conductor connected to earth. The first portion (20a) and the second portion (20b) are both independently movable to maintain electrical coupling to the electrically conducting portion of the blade and nacelle respectively. A lightning current transfer portion (104) is provided that comprises a spark gap (106) formed between an electrical connection (108) to the first portion (20a) and an electrical connection (110) to the second portion (20b). The electrical connections (108, 110) are moveable with their respective first or second portion (20a, 20b).

Abstract: The present invention relates to a lightning current transfer system (100) adapted for usage in a wind turbine (W) having a hub (20) that is rotatably supported relative to a generator in a nacelle (30) and a plurality of blades (10) that are pivotably connected with the hub, wherein the hub (20) is covered by a spinner (20A). The lightning current transfer system (100) comprises a blade band (10A) mountable to the root of the blade (10); a lightning ring (80mountable to the spinner (20A) facing the nacelle (30); a first contact device (70) mountable to the spinner (20A) adapted for providing lightning current transfer from the blade band (10A); a connecting device (75) for connecting the first contact device (70) with the lightning ring (80); and a second contact device (30B) mountable to the nacelle (30) and adapted for providing lightning current transfer from the lightning ring (80) to ground.

Abstract: A lightning current transfer unit (100) for a wind turbine, the lightning current transfer unit (100) comprising a first portion (20a) configured to be electrically coupled to an electrically conducting portion of a blade of a wind turbine electrically connected to a down conductor of the blade and a second portion (20b) configured to be electrically coupled to an electrically conducting portion of a nacelle of the wind turbine connected to a down conductor connected to earth. The first portion (20a) and the second portion (20b) are both independently movable to maintain electrical coupling to the electrically conducting portion of the blade and nacelle respectively. A lightning current transfer portion (104) is provided that comprises a spark gap (106) formed between an electrical connection (108) to the first portion (20a) and an electrical connection (110) to the second portion (20b). The electrical connections (108, 110) are moveable with their respective first or second portion (20a, 20b).

Abstract: The invention generally relates to a blade for a wind turbine, and to a blade for a wind turbine comprising a lightning measurement system. In particular, a lightning measurement system is provided, comprising a lightning current sensor located in the blade for more accurate lightning measurements. A method of measuring a lightning strike is also provided.

Abstract: A communication device and method of removing an LO leakage signal from a signal path on the fly is disclosed. The signal path may be that of a transmitter or receiver. An initial RF output signal, containing a desired RF output signal and an LO leakage signal, is supplied from a feedforward path to a combiner/splitter on a feedback path. A 180° out-of-phase copy of the desired RF output signal is also supplied to the combiner/splitter. The resulting LO leakage signal is down-converted and the power of the down-converted signal determined and used to suppress the LO leakage signal. The resulting LO leakage signal is also supplied to the feedforward path of the feedback loop.

Abstract: Steam is discharged onto a carcass surface from a plurality of steam discharge jets, and impurities, steam and condensate are drawn in from the surface through a plurality of suction nozzles adapted to following an uneven surface of the carcass. A cleaning device for cleaning the surface comprises steam discharge jets and suction nozzles adapted to following an uneven surface of the carcass. Jets and nozzles may be combined into nozzle arrangements adapted to deflect resiliently. Nozzle arrangements may be made from a hose having a central lumen and a number of narrow channels embedded into the hose wall. A cleaning machine may incorporate the cleaning device as well as automated machinery for sweeping it across the carcass surface.

Abstract: A communication device and method of removing an LO leakage signal from a signal path on the fly is disclosed. The signal path may be that of a transmitter or receiver. An initial RF output signal, containing a desired RF output signal and an LO leakage signal, is supplied from a feedforward path to a combiner/splitter on a feedback path. A 180° out-of-phase copy of the desired RF output signal is also supplied to the combiner/splitter. The resulting LO leakage signal is down-converted and the power of the down-converted signal determined and used to suppress the LO leakage signal. The resulting LO leakage signal is also supplied to the feedforward path of the feedback loop.

Abstract: The invention concerns a hydraulic steering (1) with a steering valve (7) located between a supply connection arrangement (P, T) and a steering motor (2). It is endeavoured to improve the safety of such a steering. For this purpose, the steering valve (7) has a hydraulic drive (9, 10) with a pilot valve arrangement (11) supplied by a pressure control valve (5), a stop valve (16) being located between the pressure control valve (5) and the pilot valve arrangement (11).

Abstract: The invention concerns a hydraulic steering (1) with a steering motor (8), a steering unit (2) with feedback behaviour, a steering member activating the steering unit (2) and a shock valve arrangement (50) between the steering motor (8) and the steering unit (2). It is endeavoured to enable changes of the feedback behaviour in a simple manner. For this purpose it is ensured that a switchable feedback suppression device (9) is located at the side of the shock valve arrangement (50) facing away from the steering motor (8).

Abstract: The invention concerns a hydraulic steering arrangement (1) with a supply connection arrangement having at least a high-pressure connection (P) and a low-pressure connection (T), a working connection arrangement having at least two working connections (L, R), a steering unit (7), which can be activated by a steering transducer (2), the steering unit having a first load-sensing connection (LS1), and a steering valve (8) having a second load-sensing connection (LS2), the steering unit (7) and the steering valve (8) being arranged in parallel with each other between the supply connection arrangement and the working connection arrangement. It is endeavoured to ensure a good steering behaviour.