Abstract: There is described a rotor for a vertical axis wind turbine comprising: first and second blades connected to one another and arranged to rotate around an axis; wherein the first and second blades are disposed 180° apart with respect to one another and are offset from the axis in a radial direction; wherein an inner edge of each blade is spaced radially inwardly from an outer edge of the opposing blade to form a pair of diametrically opposed openings which open in opposite directions; wherein each of the first and second blades comprises a first curved section and a second oppositely curved section, the first and second curved sections being separated by a point of inflection; and wherein the first and second curved sections of the first and second blades overlap one another to form a passageway between the first and second blades which extends between the openings.

Abstract: There is described a rotor for a vertical axis wind turbine comprising: first and second blades connected to one another and arranged to rotate around an axis; wherein the first and second blades are disposed 180° apart with respect to one another and are offset from the axis in a radial direction; wherein an inner edge of each blade is spaced radially inwardly from an outer edge of the opposing blade to form a pair of diametrically opposed openings which open in opposite directions; wherein each of the first and second blades comprises a first curved section and a second oppositely curved section, the first and second curved sections being separated by a point of inflection; and wherein the first and second curved sections of the first and second blades overlap one another to form a passageway between the first and second blades which extends between the openings.

Abstract: A modular wind turbine system comprises modules with electrically conductive structural rails supporting wind turbines. The wind turbines drive generators electrically connected to the rails. Individual modules are electrically and mechanically linked to adjacent modules, simultaneously bracing the overall structure and providing a means of conveying the electricity, produced by the generators, to the location or locations required for consumption, storage or onward transmission of that electricity.

Abstract: A modular wind turbine system comprises modules with electrically conductive structural rails supporting wind turbines. The wind turbines drive generators electrically connected to the rails. Individual modules are electrically and mechanically linked to adjacent modules, simultaneously bracing the overall structure and providing a means of conveying the electricity, produced by the generators, to the location or locations required for consumption, storage or onward transmission of that electricity.

Abstract: An electrical wire or cable having insulation comprising a first layer of a polyolefin-based formulation, of which at least 20%, preferably at least 40%, more preferably at least 60% or very preferably at least 80% of the weight of the polymeric portion of the formulation consists of a carbonyl-containing polymer (homopolymer or copolymer or terpolymer), the at least one constituent monomer of the polymer being a carboxylic acid ester, preferably an acrylate or acetate, especially an alkyl acrylate (preferably methyl acrylate, ethyl acrylate, propyl acrylate or butyl acrylate), the monomer itself being at least 5%, preferably at least 9%, more preferably at least 15% by weight of the said co- or terpolymer when used, and the remainder or the majority of the remainder of the said co- or terpolymer preferably being derived from olefinic monomer, preferably ethylene; a second layer of another material formulation in contact with the first layer, containing at least 10%, more preferably at least 50%, very prefe

Abstract: Wire or cable insulation comprising at least 30%, preferably at least 40%, of polypropylene homo- and/or co-polymer, and comprising at least 2%, preferably at least 4% zinc sulphide and/or at least 5%, preferably at least 10%, zinc oxide, percentages being by weight based on the whole insulation composition. preferably, the insulation contains little or substantially zero hydrated flame-retardant fillers and substantially zero mercaptobenzimidazole, and a majority by weight or substantially all of any propylene copolymers present are copolymers of propylene with halogen-free co-monomers.

Abstract: An electrical wire or cable having insulation comprising