Systems and methods are provided for the recovery mechanical power from heat energy sources using a common working fluid comprising, in some embodiments, an organic refrigerant flowing through multiple heat exchangers and expanders. The distribution of heat energy from the source may be portioned, distributed, and communicated to each of the heat exchangers so as to permit utilization of up to all available heat energy. In some embodiments, the system utilizes up to and including all of the available heat energy from the source. The expanders may be operatively coupled to one or more generators that convert the mechanical energy of the expansion process into electrical energy, or the mechanical energy may be communicated to other devices to perform work.

A combined cycle plant includes: a plurality of turbine devices; and a connection line, in which each of the plurality of turbine devices includes a gas turbine unit which includes a gas turbine, a first compressor, and a waste heat recovery boiler, a steam turbine unit which includes a steam turbine, and a second compressor which is driven by power obtained from the steam turbine and contributes to compression of a process gas in a plant, and steam supply lines which supplies steam lead out from the waste heat recovery boiler to the steam turbine, and the connection line is disposed between the steam supply lines configuring the plurality of turbine devices and connect the plurality of steam supply lines to each other.

A process for improving the efficiency of a steam power generation plant, the process providing utilizing steam or water from a steam cycle of a steam power plant; and supplying a steam cycle treatment to the steam cycle, thereby generating a hydrophobic coating within the steam cycle.

He is disclosed a heat scavenging system for recapturing waste heat from an internal combustion engine having a water cooling system and an exhaust system. The heat scavenging system includes a first cooling stream coupled to the exhaust system for transferring heat from the exhaust system and converting it into a first high pressure gas stream for driving a first turbine coupled to a first electric generator. The system further includes a second cooling stream coupled to the water cooling system for converting heat from the water cooling system into a second high pressure gas stream for driving a second turbine coupled to a second electric generator. The first and second electric generators effectively convert the waste heat from the internal combustion engine into electrical energy.

A process for the combined generation of mechanical power and manufacture of hydrocarbons is proposed, wherein in order to generate the mechanical power at least one internal combustion engine (1) is fired up, thereby producing a combustion exhaust gas (c), and in order to produce the hydrocarbons at least one reactor (2) is heated using a fuel (e) and a combustion support gas (d). The invention provides that at least a proportion of the combustion support gas (d) is heated by indirect heat exchange with at least a proportion of the combustion exhaust gas (c) from the internal combustion engine (1). The present invention also relates to a corresponding installation (100, 200).

Three-way valve with a valve housing and a closing body arranged in a longitudinally movable manner in the valve housing. An inlet channel, a first outlet channel and a second outlet channel are formed in the valve housing. The closing body interacts by longitudinal movement with a first valve seat formed in the valve housing and thereby opens and closes a first hydraulic connection between the inlet channel and the first outlet channel. Furthermore, the closing body interacts by longitudinal movement with a second valve seat formed in the valve housing and thereby opens and closes a second hydraulic connection between the inlet channel and the second outlet channel. A throttle is formed in the second hydraulic connection.

A subcritical pressure high-temperature steam power plant includes a combustion boiler system, steam turbine generator system, and condensate and feedwater system and wherein the conditions of steam generated in the boiler system and supplied to the steam turbine generator system are subcritical pressure and high temperature (turbine inlet temperature of 593° C. or more).

Some embodiments of the present disclosure include a method and method for recovery of solution mined minerals. The method may include creating superheated steam using a steam boiler; passing the superheated steam through a turbine/generator to generate electricity; reheating the steam exiting the turbine/generator to saturation with a steam reheater; using the saturated steam with an absorption chiller to create chilled water; and recovering minerals using the chilled water in a cooling crystallizer system. In embodiments, the method and system may be used to recover minerals, such as potash (KCl), washing soda (Na.sub.2CO.sub.3.10H.sub.2O); nahcolite (NaHCO.sub.3); and glauber salt (NaSO.sub.4.10H.sub.2O). The method may utilize the trigeneration of steam, electrical, and chilled water utilities, which may be used for a recovery process.

A method of generating syngas as a primary product from renewable feedstock, fossil fuels, or hazardous waste with the use of a cupola. The cupola operates on inductive heat alone, chemically assisted heat, or plasma assisted heat. Cupola operation is augmented by employing carbon or graphite rods to carry electrical current into the metal bath that is influenced by the inductive element. The method includes the steps of providing a cupola for containing a metal bath; and operating an inductive element to react with the metal bath. A combination of fossil fuel, a hazardous waste, and a hazardous material is supplied to the cupola. A plasma torch operates on the metal bath directly, indirectly, or in a downdraft arrangement. Steam, air, oxygen enriched air, or oxygen are supplied to the metal bath. A pregassifier increases efficiency and a duct fired burner is added to a simple cycle turbine with fossil fuel augmentation.

A waste heat recovery system includes a condenser to receive a working fluid in a vapor state and provide the working fluid in a liquid state; a pump in fluid communication with the condenser; a waste heat boiler in fluid communication with the pump, the waste heat boiler to receive the working fluid from the pump and vaporize the working fluid using waste heat from a mechanical system; an expander in fluid communication with the waste heat boiler and the condenser, the expander to receive the vaporized working fluid from the waste heat boiler and to provide the working fluid to the condenser, the expander to produce mechanical power; and a mechanical coupling system mechanically coupled between the expander and the mechanical system.