A system for producing a heat source for heating or electricity, using medium/low-temperature waste heat includes: an absorption-type heat pump (100) supplied with a driving heat source and heat source water to heat a low-temperature heat medium; a regenerator heat exchange unit (210) for supplying a regenerator (110) with a driving heat source using waste heat; an evaporator heat exchange unit (220) for supplying an evaporator with heat source water; a heat medium circulation line (310) for circulating a heat medium; a generation unit (400) branching off from the heat medium circulation line (310) and producing electricity; a heat production unit (500) branching off from the heat medium circulation line (310) and supplying a heat-demanding place with a heat source for heating; and a switching valve unit (600) for controlling the flow of heat medium supplied the generation unit (400) or the heat production unit (500).

The invention relates generally to gas turbine engines used for electrical power generation. More specifically, embodiments of the present invention provide systems and ways for improving the life and reducing start-up time necessary for bringing gas turbine engines online and up to full power.

A method is presented and described for compensating load peaks during the generating of electrical energy and/or for the generating of electrical energy by utilizing the heat of heated carrier gas (2) for the electricity generation, and/or for the utilization of the heat of heated carrier gas (2) for hydrogen generation, comprising the steps: heating of carrier gas (2), especially hot air, in at least one gas heater (4a-d), wherein hot carrier gas (2) with a specified target charge temperature exits from the gas heater (4a-d), thermal charging of at least one heat storage module (5a-d) of a plurality of heat storage modules (5a-d) of the storage power station (1) by releasing heat from the hot carrier gas (2) from the gas heater (4a-d) to a heat storage material of the heat storage module (5a-d), time-delayed thermal discharge of at least one heat storage module (5a-d), preferably of a plurality of heat storage modules (5a-d), wherein colder carrier gas (2), especially cold air, flows through at least one heat storage module (5a-d) and heat from the heat storage material is transferred to the colder carrier gas (2) for the heating of the carrier gas (2) and wherein heated carrier gas (2) with a specified discharge temperature exits from the heat storage module (5a-d), and utilization of the heat transferred to the carrier gas (2) in a process for electricity generation and/or hydrogen generation.

Various embodiments include a system having: at least one computing device configured to perform actions including: measuring at least one of the following parameters: a steam pressure within a steam drum, a load on a GT, a position of a bypass valve bypassing an HRSG, and a steam flow rate through the steam drum; defining a threshold range for each of: a steam pressure within the steam drum, a load on the GT, a position of the bypass valve bypassing the HRSG and a steam flow rate through the steam drum based upon the measured data and a target steam level; and adjusting the steam flow rate through the steam drum in response to at least one of the measured parameters deviating from the corresponding threshold range.

A method for determining an operating set point for a combined cycle power plant, the method includes: simulating the operation of the power plant; correcting the simulation of the operation of the power plant; optimizing the simulation of the operation by simulating the operation at different operating settings and selecting at least one of the operating settings as being optimal, and generating the operating set point based on the optimized simulation of the power plant.

A waste heat recovery system includes: a heater which evaporates a working medium by exchanging heat between supercharged air supplied to an engine and the working medium; an expander which expands the working medium which has flowed out from the heater; a power recovery device connected to the expander; a condenser which condenses the working medium which has flowed out from the expander; a cooling medium supply pipe for supplying a cooling medium to an air cooler which cools the supercharged air which has flowed out from the heater; a cooling medium pump which is provided in the cooling medium supply pipe and which sends the cooling medium to the air cooler; and a branch pipe which bifurcates a part of the cooling medium flowing in the cooling medium supply pipe, to the condenser, in such a manner that the working medium is cooled by the cooling medium.

A heat exchanger includes a sensor grid with sensor leads extending through tube restraints for heat exchange tubes in the heat exchanger. The tube restraint includes a body having a plurality of tube openings defined therein with each tube opening receiving one heat exchange tube of the set of heat exchange tubes therethrough. The body also includes a sensor lead opening defined therein to receive a sensor lead therethrough. Each tube opening has a larger dimension than the sensor lead opening. The sensor grid is installed during manufacture rather than in the field, allowing the sensor grid to be on outermost and inner sets of hea exchange tubes in the heat exchanger.

The invention relates to a method for operating a gas turbine power plant, including a gas turbine, a HRSG following the gas turbine, an exhaust gas blower, and a carbon dioxide separation plant which separates the carbon dioxide contained in the exhaust gases and discharges it to a carbon dioxide outlet, the gas turbine, HRSG, exhaust gas blower, and carbon dioxide separation plant being connected by means of exhaust gas lines. According to the method a trip of the gas turbine power plant includes the steps of: stopping the fuel supply, switching off the exhaust gas blower, and controlling the opening angle of a VIGV at a position bigger or equal to a position required to keep a pressure in the exhaust gas lines between the HRSG and the exhaust gas blower above a minimum required pressure. The invention relates, further relates to a gas turbine power plant configured to carry out such a method.

A method for operating a regenerative heat storage arrangement, wherein the heat storage arrangement has a gas heater for heating a carrier gas; a heat storage row with multiple heat storage modules; and at least one compressor. During a loading cycle, carrier gas heated in the gas heater flows through at least one heat reservoir module, which is thermally charged by the transfer of heat from the heated carrier gas to a heat storage material of the heat reservoir module. The carrier gas is cooled during the charging process. If, after the charging of a heat reservoir module, the carrier gas temperature reaches or exceeds a minimum charging temperature for a subsequent heat reservoir module, the carrier gas is fed to the subsequent heat reservoir module for charging. The carrier gas is recirculated back to the gas heater if the carrier gas temperature falls below the minimum charging temperature.

A control system uses a modeled steam turbine megawatt (power) change attributed to a gas turbine demand change (i.e., a steam turbine to gas turbine transfer function) within a conventional closed loop feedback control scheme to perform control of a combined cycle power plant. This control system implements a form of internal model control and provides better unit megawatt (power) set-point tracking and disturbance variable rejection for overall more robust control, and thus operates to optimize the gas turbine operation of the combined cycle power plant in a manner that provides cost savings over time.