Abstract: To obtain a rotary electric machine in which an insulation failure does not occur even when the output of the rotary electric machine is increased by improving the cooling performance at the rotor winding ends. The rotary electric machine includes a rotor winding wound around a rotor core with a gap, rotor winding ends formed by the rotor winding protruding to an end surface of the rotor core in an axial direction, spacers arranged between adjacent rotor winding ends, mountain-shaped winding support portions provided on both surfaces of the spacers and having an apex with an obtuse angle, meandering ventilation paths formed on both surfaces of the spacers by the mountain-shaped winding support portions and wave-shaped winding support portions formed in the meandering ventilation paths along the meandering ventilation paths.

Abstract: A compound energy co-generation system converts forestry, agricultural, and similar biomass to energy at the source farm. A working fluid reserve at the base is coupled with a boiler inlet. The boiler has a combustion chamber, a vertically rising exhaust stack, and a liquid jacket around the combustion chamber and rising from the working fluid reserve. The liquid jacket receives thermal energy from the combustion chamber and converts a portion of the liquid working fluid into a gas to create a dual-phase working fluid. A reciprocal fluid container, which in one embodiment is a piston and in another is a sealed and insulated container, receives the elevated liquid working fluid. The change in weight drives a power conversion system to convert lowering of the fluid container into electrical energy. Additional ordinarily wasted energy components are employed to perform useful work to improve overall efficiency.

Abstract: A supercritical steam generator includes a downdraft furnace enclosure, a hopper tunnel, and a convection pass enclosure, with the hopper tunnel joining the downdraft furnace enclosure and convection pass enclosure together. Flue gas passes down through the downdraft furnace enclosure through the hopper tunnel and up through the convection pass enclosure. This structure permits the outlet steam terminals, which provide access to the resultant supercritical steam and/or reheat steam, to be located at a base of the steam generator rather than at the top of the steam generator as with conventional boilers. This reduces the length of the steam leads from the steam generator to a steam turbine that produces electricity using the supercritical steam.

Abstract: A boiler system having a series of boilers. Each boiler includes a shell having an upstream end, a downstream end, and a hollow interior. The boilers also have an oxidizer inlet entering the hollow interior adjacent the upstream end of the shell and a fuel nozzle positioned adjacent the upstream end of the shell for introducing fuel into the hollow interior of the shell. Each boiler includes a flue duct connected to the shell adjacent the downstream end for transporting flue gas from the hollow interior. Oxygen is delivered to the oxidizer inlet of the first boiler in the series. Flue gas from the immediately preceding boiler in the series is delivered through the oxidizer inlet of each boiler subsequent to the first boiler in the series.

Abstract: A ground supported single drum power boiler is described combining a refractory lined and insulated stepped floor; refractory lined and insulated combustion chamber; integrated fuel chutes configured to pre-dry wet solid fuel; internal chamber walls; configurable combustion air systems; a back pass with after-burner ports and cross flow superheaters; and a rear wall that acts as the downcomers feeding the other walls. A second embodiment is adaptable as a gasifier.