Abstract: A roof 201 has an apex 200. A wind turbine 202 is positioned above the apex 200. Air flows through the gap 204 between the apex 200 and the turbine 202. A flow optimizer 203 diverts a section of airflow close to the apex 200 into the region 205, downstream of the apex. This section of diverted airflow is turned away from the local airflow direction towards the surface of the roof 201, downstream of the apex. This reduces the boundary layer separation and turbulence downstream of the apex 200, which reduces energy loss associated with sub-optimal static pressure recovery downstream of the apex 200, and thus increases the discharge coefficient of the system.

Abstract: A roof 201 has an apex 200. A wind turbine 202 is positioned above the apex 200. Air flows through the gap 204 between the apex 200 and the turbine 202. A flow optimiser 203 diverts a section of airflow close to the apex 200 into the region 205, downstream of the apex. This section of diverted airflow is turned away from the local airflow direction towards the surface of the roof 201, downstream of the apex. This reduces the boundary layer separation and turbulence downstream of the apex 200, which reduces energy loss associated with sub-optimal static pressure recovery downstream of the apex 200, and thus increases the discharge coefficient of the system.

Abstract: A turbine assembly comprising, a rotor having a plurality of blades, and a shroud at least partially enclosing the rotor and adapted to expose a portion of the rotor. At least two shroud portions extend axially along the rotor and around the rotor to at least partially enclose the rotor. At least two shroud portions are rotationally adjustable. In use, the shroud defines a variable inlet and a variable outlet. The inlet area and outlet area are variable independently of each other. Adjustment of the area of the inlet area does not result in the same magnitude of adjustment in area of the outlet area. Adjustment of the position of the inlet area does not result in the same magnitude of adjustment of the position of the outlet area.

Abstract: A turbine assembly (10, 90, 100, 200) comprising, a rotor (20) having a plurality of blades (30), and a shroud (40) at least partially enclosing the rotor (20) and adapted to expose a portion of the rotor (20).

Abstract: A succinimide dispersant, which is the reaction product of hydrocarbons or polymers functionalized by halogenation (e.g. chlorination), thermal "ene" reaction or free radical grafting and derivatized with a heavy polyamine. A heavy polyamine is a mixture of polyalkylenepolyamines comprising small amounts of lower polyamine oligomers such as tetraethylene pentamine and pentahexamine but primarily oligomers with 7 or more nitrogens, 2 or more primary amines per molecule, and more extensive branching than conventional polyamine mixtures.

Abstract: Piston deposits resulting from neutralizing combustion acids present in the lubricating oil circulating within the lubrication system of an internal combustion engine are reduced or eliminated by first cntacting the acids with a soluble weak base in the piston ring zone of the engine to form soluble neutral salts containing the weak base and the combustion acids. Thereafter, the neutral salts are contacted with a heterogenous strong base immobilized within the lubrication system but outside of the piston ring zone. The strong base displaces the weak base from the neutral salts, returning the weak base to the oil for recirculation to the piston ring zone for further use. The remaining strong base/combustion adic salts are immobilized as deposits with the strong base rather than on the piston. In a preferred embodiment, trioctadecyl amine is the weak base and magnesium oxide is the strong base.

Abstract: Piston deposits resulting from neutralizing combustion acids present in the lubricating oil circulating within the lubrication system of an internal combustion engine are reduced or eliminated by first contacting the acids with a soluble weak base in the piston ring zone of the engine to form soluble neutral salts containing the weak base and the combustion acids. Thereafter, the neutral salts are contacted with a heterogeneous strong base immobilized within the lubrication system but outside of the piston ring zone. The strong base displaces the weak base from the neutral salts, returning the weak base to the oil for recirculation to the piston ring zone for further use. The remaining strong base/combustion acid salts are immobilized as deposits with the strong base rather than on the piston. In a preferred embodiment, trioctadecyl amine is the weak base and zinc oxide is the strong base. In a particularly preferred embodiment, the strong base is incorporated on a substrate, preferably a cement binder.

Abstract: Piston deposits resulting from neutralizing combustion acids present in the lubricating oil circulating within the lubrication system of an internal combustion engine are reduced or eliminated by first contacting the acids with a soluble weak base in the piston ring zone of the engine to form soluble neutral salts containing the weak base and the combustion acids. Thereafter, the neutral salts are contacted with a heterogenous strong base immobilized within the lubrication system by outside of the piston ring zone. The strong base displaces the weak base from the neutral salts, returning the weak base to the oil for recirculation to the piston ring zone for further use. The remaining strong base/combustion acid salts are immobilized as deposits with the strong base rather than on the piston. In a preferred embodiment, trioctadecyl amine is the weak base and zinc oxide is the strong base. In a particularly preferred embodiment, the weak base is incorporated on a substrate, preferably a cement binder.