A combination valve for a steam circuit, includes a quick-closing valve and a regulating valve. The quick-closing valve and the regulating valve are arranged in a common housing. The regulating valve is displaceable by an active drive and the quick-closing valve is passively displaceable by the steam.

A combination valve for a steam circuit, includes a quick-closing valve and a regulating valve. The quick-closing valve and the regulating valve are arranged in a common housing. The regulating valve is displaceable by an active drive and the quick-closing valve is passively displaceable by the steam.

A system for maintaining electrical power continuity in a steam-based power plant is provided. The system includes a fossil fuel-fired power generation unit and an electrical power storage apparatus. The fossil fuel-fired power generation unit is operative to generate and provide electrical power to an electrical power grid. The electrical power storage apparatus is electrically coupled to the fossil fuel-fired power generation unit and operative to: receive and store electrical power from the fossil fuel-fired power generation unit during periods of surplus electrical power generation by the fossil fuel-fired power generation unit; and to provide electrical power to a component of the fossil fuel-fired power generation unit during periods of electrical power shortage by the electrical power grid.

A system for maintaining electrical power continuity in a steam-based power plant is provided. The system includes a fossil fuel-fired power generation unit and an electrical power storage apparatus. The fossil fuel-fired power generation unit is operative to generate and provide electrical power to an electrical power grid. The electrical power storage apparatus is electrically coupled to the fossil fuel-fired power generation unit and operative to: receive and store electrical power from the fossil fuel-fired power generation unit during periods of surplus electrical power generation by the fossil fuel-fired power generation unit; and to provide electrical power to a component of the fossil fuel-fired power generation unit during periods of electrical power shortage by the electrical power grid.

A 660MW supercritical unit bypass control method after a load rejection is provided. Steam channels after the load rejection are switched without an interference, and ache steam pressure is controllable. The 660MW supercritical unit bypass control method includes Pipeline 1, Pipeline 2, Pipeline 3, and Pipeline 4; a bottom of Pipeline 3, a bottom of the Pipeline 2, and a head of the Pipeline 4 are connected by a temperature and pressure reducer; a bottom of the Pipeline 1 is connected to a head of Pipeline 2; a branch pipe is arranged between the Pipeline 1 and the Pipeline 2, and a steam turbine is arranged in the branch pipe. A high-pressure bypass control system automatically adapts to the load rejection or FCB under any loading situation, avoids drastic changes of unit parameters from loading fluctuations, meets requirements of the load rejection and the FCB.

A 660MW supercritical unit bypass control method after a load rejection is provided. Steam channels after the load rejection are switched without an interference, and ache steam pressure is controllable. The 660MW supercritical unit bypass control method includes Pipeline 1, Pipeline 2, Pipeline 3, and Pipeline 4; a bottom of Pipeline 3, a bottom of the Pipeline 2, and a head of the Pipeline 4 are connected by a temperature and pressure reducer; a bottom of the Pipeline 1 is connected to a head of Pipeline 2; a branch pipe is arranged between the Pipeline 1 and the Pipeline 2, and a steam turbine is arranged in the branch pipe. A high-pressure bypass control system automatically adapts to the load rejection or FCB under any loading situation, avoids drastic changes of unit parameters from loading fluctuations, meets requirements of the load rejection and the FCB.

Processes for controlling the flowrate of and recovering energy from a gas stream in a processing unit are described. One process comprises directing a portion of the gas stream through one or more variable-resistance power-recovery turbines to control the flowrate of the gas stream and generate electric power therefrom; and controlling the pressure and temperature of the gas stream so that the gas exiting the power-recovery turbine remains in the gas phase.

Processes for controlling the flowrate of and recovering energy from a gas stream in a processing unit are described. One process comprises directing a portion of the gas stream through one or more variable-resistance power-recovery turbines to control the flowrate of the gas stream and generate electric power therefrom; and controlling the pressure and temperature of the gas stream so that the gas exiting the power-recovery turbine remains in the gas phase.

Embodiments of systems and methods for generating power in the vicinity of a drilling rig are disclosed. During a drilling operation, heat generated by drilling fluid flowing from a borehole, exhaust from an engine, and/or fluid from an engine's water (or other fluid) jacket, for example, may be utilized by corresponding heat exchangers to facilitate heat transfer to a working fluid. The heated working fluid may cause an ORC unit to generate electrical power.

A process for energy management includes actuating a closed cyclic thermodynamic transformation, first in one direction in a charge configuration/phase and then in the opposite direction in a discharge configuration/phase, between a casing for the storage of a working fluid other than atmospheric air, in gaseous phase and in equilibrium of pressure with the atmosphere, and a tank for the storage of the working fluid in liquid or super-critical phase with a temperature close to its own critical temperature. In the charge phase, the process accumulates heat and pressure. In the discharge phase, the process generates energy. The process includes actuating, with at least one part of the working fluid, at least one closed thermodynamic cycle, even at the same time as the charge phase or as the discharge phase; and heating the working fluid by means of at least one oxy-combustion within the closed thermodynamic cycle.