A Steam power plant comprising a steam turbine (3) and a condenser (5), wherein the condenser (5) is disclosed, comprising a first heat sink being a ground heat exchanger (29) is connected to the condenser during times when ground temperature is lower than air temperature; and a second heat sink being an above-ground heat exchanger is connected to the condenser during times when ground temperature is not lower than air temperature.

The present disclosure is directed to heat recovery systems that employ two or more organic Rankine cycle (ORC) units disposed in series. According to certain embodiments, each ORC unit includes an evaporator that heats an organic working fluid, a turbine generator set that expands the working fluid to generate electricity, a condenser that cools the working fluid, and a pump that returns the working fluid to the evaporator. The heating fluid is directed through each evaporator to heat the working fluid circulating within each ORC unit, and the cooling fluid is directed through each condenser to cool the working fluid circulating within each ORC unit. The heating fluid and the cooling fluid flow through the ORC units in series in the same or opposite directions.

A compressor installation provided with one or more compressor elements and a heat recovery circuit in the form of a closed Rankine circuit in which a working medium circulates through one or more evaporators that act as a cooler for the compressed gas, and a condenser connected to a cooling circuit for cooling the working medium in the condenser, whereby an additional cooler is provided for each evaporator that is connected in series to an evaporator concerned, and which is calculated to be able to guarantee sufficient cooling by itself when the heat recovery circuit is switched off

A cascade organic Rankine cycle plant comprising a hot source, at least a first high temperature organic Rankine cycle and a second low temperature organic Rankine cycle, said cycles comprising at least one preheater, at least one vaporizer, at least one turbine, at least one condenser, wherein the hot source first supplies a vaporizer of the high temperature cycle, then the vaporizer of the low temperature cycle and finally it is divided into two flows which supply a first preheater of the high temperature cycle and a preheater of the low temperature cycle. The first high-temperature organic Rankine cycle comprises a further vaporizer operating at an intermediate pressure between the vaporizer pressure of the high temperature cycle and the vaporizer pressure of the low temperature cycle.

A combined cycle power plant that includes a gas turbine engine, a heat recovery steam generator (HRSG), a steam turbine, a primary condenser, a condensate extraction pump, a gland steam condenser, and a cooling module. The HRSG generates steam. The steam turbine receives steam from the HRSG. The primary condenser is fluidly coupled to the steam turbine and receives a first portion of exhaust steam from the steam turbine. The condensate extraction pump is fluidly coupled to the primary condenser and receives a condensed first portion of exhaust steam. The gland steam condenser is fluidly coupled to the steam turbine and receives a second portion of exhaust steam from the steam turbine. The cooling module is fluidly coupled to the gland steam condenser and supplies a cooling fluid to the gland steam condenser. The cooling module is fluidly isolated from the condensate extraction pump.

A steam turbine plant and an operating method thereof, and a combined cycle plant and an operating method thereof, include: a turbine; steam supply lines that supply main steam to the turbine; a steam control valve and an intercept valve provided to the steam supply lines; and a first auxiliary steam supply line that supplies auxiliary steam to the turbine via the steam supply lines which are located farther downstream than the steam control valve and the intercept valve.

A steam turbine plant and an operating method thereof, and a combined cycle plant and an operating method thereof, include: a turbine; steam supply lines that supply main steam to the turbine; a steam control valve and an intercept valve provided to the steam supply lines; and a first auxiliary steam supply line that supplies auxiliary steam to the turbine via the steam supply lines which are located farther downstream than the steam control valve and the intercept valve.

A device for utilizing the waste heat of a thermo-process device comprising a first heat exchanger for transferring heat from a heat flow of a thermo-process device to a heat transfer medium; a second heat exchanger for transferring heat from the heat flow to a heat transfer medium, the second heat exchanger being arranged downstream of the first heat exchanger with respect to the heat flow; a thermodynamic cycle device having a third heat exchanger for transferring heat from the heat transfer medium to a working medium of the thermodynamic cycle device and having a fourth heat exchanger for transferring heat from the heat transfer medium to the working medium, the fourth heat exchanger being arranged upstream of the second heat exchanger with respect to the flow of the working medium; wherein heat transfer medium cooled in the third heat exchanger can be supplied at least partially to the first heat exchanger for heating and wherein heat transfer medium cooled in the fourth heat exchanger can be supplied at least partially to the second heat exchanger for heating.

A bottoming cycle power system includes a turbine generator and an open cycle absorption system. The turbine-generator includes a turbo-expander and turbo-compressor disposed on a turbo-crankshaft. The turbo-expander is operable to rotate the turbo-crankshaft as a flow of exhaust gas from a combustion process passes through the turbo-expander. The turbo-compressor is operable to compress the flow of exhaust gas after the exhaust gas passes through the turbo-expander. The open cycle absorption chiller system includes an absorber section that is operable to receive the flow of exhaust gas from the turbo-expander. The absorber section includes a first refrigerant solution that is operable to absorb water from the exhaust gas as the exhaust gas passes through the first refrigerant solution. The absorber section is also operable to route the flow of exhaust gas to the turbo-compressor after the flow of exhaust gas has passed through the first refrigerant solution.

An energy storage plant includes a casing for the storage of a working fluid other than atmospheric air, in a gaseous phase and in equilibrium of pressure with the atmosphere; a tank for the storage of said working fluid in a liquid or supercritical phase with a temperature close to the critical temperature; wherein said critical temperature is close to the ambient temperature. The plant is configured to carry out a closed thermodynamic cyclic transformation, first in one direction in a charge configuration and then in the opposite direction in a discharge configuration, between said casing and said tank; wherein in the charge configuration the plant stores heat and pressure and in the discharge configuration generates energy.