Methods and systems for enhanced recovery of coal bed methane. A method includes generating a diluent gas mixture comprising N.sub.2 and CO.sub.2 in a semi-closed Brayton cycle power plant, injecting at least a portion of the diluent gas mixture into a coal bed, and recovering a mixed production gas comprising methane from the coal bed.

Methods and systems for enhanced recovery of coal bed methane. A method includes generating a diluent gas mixture comprising N.sub.2 and CO.sub.2 in a semi-closed Brayton cycle power plant, injecting at least a portion of the diluent gas mixture into a coal bed, and recovering a mixed production gas comprising methane from the coal bed.

This invention refers to an installation for the generation of mechanical energy using a Combined Power Cycle which comprises, at least; means to implement a closed or semi-closed regenerative constituent Brayton cycle which uses water as thermal fluid, means to implement at least one Rankine cycle, the constituent basic Rankine cycle, interconnected with the regenerative constituent Brayton cycle, and a heat pump (UAX) which makes up a closed circuit that regenerates the regenerative constituent Brayton cycle;
as well as the procedure for generating energy through the use of the cited installation.

A steam turbine facility includes a rotor shaft, a high-pressure turbine blade row and an intermediate-pressure turbine blade row disposed on the rotor shaft, a first low-pressure turbine blade row and a second low-pressure turbine blade row disposed on the rotor shaft on both sides of the intermediate-pressure turbine blade row, respectively, and a third low-pressure turbine blade row and a fourth low-pressure turbine blade row disposed on the rotor shaft on both sides of the high-pressure turbine blade row, respectively. The steam turbine facility is configured such that steam having passed through the intermediate-pressure turbine blade row is divided to flow into the first low-pressure turbine blade row, the second low-pressure turbine blade row, the third low-pressure turbine blade row, and the fourth low-pressure turbine blade row.

A steam turbine facility includes a rotor shaft, a high-pressure turbine blade row and an intermediate-pressure turbine blade row disposed on the rotor shaft, a first low-pressure turbine blade row and a second low-pressure turbine blade row disposed on the rotor shaft on both sides of the intermediate-pressure turbine blade row, respectively, and a third low-pressure turbine blade row and a fourth low-pressure turbine blade row disposed on the rotor shaft on both sides of the high-pressure turbine blade row, respectively. The steam turbine facility is configured such that steam having passed through the intermediate-pressure turbine blade row is divided to flow into the first low-pressure turbine blade row, the second low-pressure turbine blade row, the third low-pressure turbine blade row, and the fourth low-pressure turbine blade row.

The system includes a methane reformer, a combined cycle power generator, and a switch. The reformer is configured to react methane with steam. The combined cycle power generator includes a steam turbine, a gas turbine, a power generator, and a water boiler. The steam turbine is configured to rotate in response to receiving steam. The gas turbine is configured to rotate in response to receiving a mixture of fuel and air. The power generator is configured to convert rotational energy from the steam turbine and the gas turbine into electricity. In a first position, the switch is configured to direct exhaust from the gas turbine to the reformer, thereby providing heat to the reformer. In a second position, the switch is configured to direct exhaust from the gas turbine to the water boiler, thereby providing heat to the water boiler to generate steam.

A rotating machine control device is provided with: an operating terminal for changing a parameter of the rotating machine; a clearance measuring device which measures the amount of clearance between a rotor and a casing; and a control device body. The control device body, in accordance with the amount of clearance measured by means of the clearance measuring device, determines an operating amount for the operating terminal so as to vary the rate of change in the parameter, and outputs the operating amount to the operating terminal.

A facility for generating mechanical energy by means of a combined power cycle is disclosed herein, which includes at least means for carrying out a closed or semi-closed, constituent regenerative Brayton cycle, which uses water as a heat-transfer fluid, means for carrying out at least one Rankine cycle, a constituent fundamental Rankine cycle, interconnected with the regenerative Brayton cycle, and a heat pump (UAX) including a closed circuit that regenerates the constituent regenerative Brayton cycle, as well as to the method for generating energy using the facility.

A compact heat and electricity co-generation device comprised by: a) a heat generating system connected to a steam generator, a condenser and an internal working fluid, wherein said steam is obtained by external combustion of a suitable fuel in a boiler and/or by conduction of external hot gases to a boiler; y b) an electricity generator system comprised by: i) one or more radial and/or axial turbines; ii) an electric axial flow generator; and iii) an electronic control inverter. The fuel can be a solid, liquid or gaseous fuel. Both the turbine and the electric generator have passive magnetic bearings and electrodynamic bearings. The equipment does not use mechanical seals as all moving parts are housed within working fluid the pressure containment of the working fluid.

A method for block loading an electrical grid with a combined cycle power plant (CCPP) includes operating a gas turbine system of the CCPP in an islanding mode with a steam turbine system of the CCPP off line with turning gear rotating only; loading the steam turbine system accordingly to temperature matching conditions of the steam turbine system, the loading of the steam turbine system includes controlling gas turbine exhaust fed to the steam turbine system and the gas turbine exhaust temperature heats the steam turbine system and to meet temperature matching conditions of the steam turbine system; wherein controlling gas turbine exhaust includes controlling fuel flow and air flow to the gas turbine system; and operating at least one of the gas turbine system and steam turbine system to block load the electrical grid from a load on at least one of gas turbine system and steam turbine system.