A method, apparatus, and system for determining the temperature of a supercritical fluid that involves determining the speed of sound in the supercritical fluid.

Supersonic jet engine includes a housing and an exhaust nozzle. Spike extends outwardly from the housing. Plurality of fans are arranged in an axial direction within the housing, each of the plurality of fans includes a plurality of fan blades. Plurality of turbines are included, and each of the plurality of turbines having a plurality of turbine blades and being arranged and coupled to a respective one of the fans in a radial direction. Plurality of radial compressors are located radially from the each of the plurality of turbines and are operable to drivingly rotate the respective turbine, which in turn rotates the respective fan. Plurality of electric motors are included, and each of the plurality of electric motors are coupled to a respective one of the plurality of radial compressors and drivingly rotating the respective radial compressor.

A gas turbine system has a source of ammonia and a source of an oxygen-containing gas, a first combustion chamber connected to receive ammonia, a hydrogen-rich gas stream and oxygen-containing gas, a turbine connected to receive an exhaust gas stream from the first combustion chamber; and a second combustion chamber connected to receive an exhaust gas from the turbine, ammonia and a hydrogen-rich gas stream.

A piezoelectric motor comprising one or more concentric stator rings arranged to transfer energy and provide torque to an engine rotor or to an engine transmission. Such a piezo-electric motor improves spatial integration of an engine turning motor in a gas turbine engine.

An electric power system of a moving object includes a gas turbine engine including a compressor and a rotating electric machine connected to the gas turbine engine, a first bleed air flow path configured to introduce bleed air obtained by taking out a part of air compressed by the compressor into the rotating electric machine, and a second bleed air flow path configured to guide the bleed air introduced into the rotating electric machine to a component requiring cooling of the turbine engine.

A dual cycle system for generating shaft power using a supercritical fluid and a fossil fuel. The first cycle is an open, air breathing Brayton cycle. The second cycle is a closed, supercritical fluid Brayton cycle. After compression of air in the first cycle, the compressed air flows through a first cross cycle heat exchanger through which the supercritical fluid from the second cycle flows after it has been compressed and then expanded in a turbine. In the first cross cycle heat exchanger, the compressed air is heated and the expanded supercritical fluid is cooled. Prior to expansion in a turbine, the compressed supercritical fluid flows through a second cross cycle heat exchanger through which also flows combustion gas, produced by burning a fossil fuel in the compressed air in the first cycle. In the second cross cycle heat exchanger, the combustion gas is cooled and the compressed supercritical fluid is heated.

Modifications to power plants for moderating climate warming and increasing safety combine a large compressed air energy storage (CAES) system with a thermal power plant such that free power plant waste heat replaces natural gas used at existing and planned CAES facilities. The system allows higher percentages of wind and solar energy on existing grids. The compressed air in a companion CAES can cool a nuclear reactor during an emergency. Also an inexpensive, add-on, external, Emergency Core Cooling System (ECCS) can cool a nuclear reactor after shutdown, even when all internal cooling water circulation has been disabled. All embodiments are installed outside the plant where they will not be damaged in the event of a plant accident. Both systems use environmentally friendly compressed air energy storage in new ways, and can be built and installed quickly around the world at existing plants using only proven infrastructure.

An aircraft propulsion system includes a fan, a primary powerplant, an augmenting powerplant and a controller. The primary powerplant is coupled to the fan and configured to rotate the fan during a first flight stage and during a second flight stage. The augmenting powerplant is coupleable with the fan. The controller is configured to cause the augmenting powerplant to drive the fan during the first flight stage, and to cause the augmenting powerplant to cease driving the fan based on an indication of a transition from the first flight stage to the second flight stage.

A device of high-temperature solar gas turbine power generation with thermal energy storage includes a combustion chamber, a solar receiver, a thermochemical energy storage tank, a triple valve A and a triple valve B. The thermochemical energy storage tank has a high-temperature side and a low-temperature side. One outlet of the triple valve A is connected to the compressed air inlet of the solar receiver, and the other outlet is connected to the inlet of the triple valve B. One outlet of the triple valve B is connected to the low-temperature side of the thermochemical energy storage tank, and the other outlet is connected to the inlet of the combustion chamber.

An energy storage plant includes a casing for the storage of a working fluid different from atmospheric air, in gaseous phase and in pressure equilibrium with the atmosphere; and a tank for the storage of said working fluid in liquid or super-critical phase with a temperature close to the critical temperature. The critical temperature is close to the ambient temperature. The plant is configured to perform a closed cyclic thermodynamic transformation, first in one direction in a charge configuration and then in an opposite direction in a discharge configuration, between said casing and said tank. In the charge configuration the plant stores heat and pressure and in the discharge configuration generates mechanical energy to drive a driven machine.