The present invention provides a method for collecting waste heat of exhaust gas and reducing white smoke, and an apparatus to which the method can be easily applied, the method comprising the steps of: introducing exhaust gas from an exhaust gas supply source including high-temperature steam to a heat and moisture exchange unit, collecting latent heat of the steam contained in the exhaust gas by making contact between the exhaust gas and a solution containing hydroscopic salts, condensing the collected latent heat, and discharging the processed exhaust gas to the outside of the heat and moisture exchange unit; and concentrating, cooling, and circulating the solution containing the hydroscopic salts by discharging, to a lower part of the heat and moisture exchange unit, a mixture of the solution containing the hydroscopic salts and condensation water.

Feedwater to be supplied to a feedwater tank via a feedwater path is passed through a waste heat recovery heat exchanger, a supercooler, and a condenser in sequence. A heat source fluid such as heat source water is passed through an evaporator and the waste heat recovery heat exchanger in sequence. The waste heat recovery heat exchanger is an indirect heat exchanger between the feedwater supplied to the feedwater tank via the feedwater path and the heat source fluid having passed through the evaporator. The supercooler is an indirect heat exchanger between the feedwater supplied to the feedwater tank via the feedwater path and a refrigerant supplied from the condenser to an expansion valve.

A semi-open high-temperature heat pump system including a compressor, a direct-contact condenser, a heat exchanger, an evaporator, a water purifier, a cold water pump, a hot water pump, a circulating water pump, and a vacuum pump. A discharge port of the compressor is connected to the direct-contact condenser, the direct-contact condenser is connected to the evaporator via the heat exchanger, and the evaporator is connected to a gas suction port of the compressor via a gas vent on its top. An outlet of the water purifier is separately connected to the compressor, the direct-contact condenser, and the evaporator via the cold water pump. An outlet at the bottom of the evaporator is connected to the direct-contact condenser via the circulating water pump. The vacuum pump is connected above the direct-contact condenser, and the hot water pump is connected below the direct-contact condenser.

An energy-saving pump, and control system for the pump comprises: a pump body arranged to receive steam from a steam generator; a steam transferor for opening/closing a pipeline between the pump body and the steam generator; and a suction valve for opening/closing a pipeline between the pump body and a water source, wherein the steam transferor is closed to receive steam and then the suction valve is opened to suction water from the water source.

Disclosed is an exhaust duct (1) for a gas turbine engine (50), comprising a silencer section (12). At least two plate-shaped silencer baffles (20) are provided inside the silencer section (12). At least one of the plate-shaped silencer baffles is configured as a heat exchange device in that it comprises at least one internal cavity (22) suitable for receiving a heat exchange fluid and leakproof with respect to the interior of the exhaust duct, wherein the at least one internal cavity is fluidly connected to the outside of the exhaust duct at an inlet port and an outlet port (23, 24). This device is useful for recuperating exhaust heat from exhaust gases of the gas turbine engine without the expense and additional space required for providing a heat recovery steam generator.

A liquefied natural gas compression system includes: a first gas turbine that drives a rotary machine; a first steam boiler including a first heat recovery steam generator that recovers heat from exhaust gas from the first gas turbine; a first steam turbine that drives a first refrigerant compressor; a common header steam line through which steam from the first steam boiler flows to an inlet of the first steam turbine; an auxiliary steam line; and a letdown valve that connects the common header steam line to the auxiliary steam line and that opens in response to pressure of the common header steam line exceeding a predetermined threshold value.

A switch-mode power supply waste heat recovery and utilization system includes a switch-mode power supply unit, an air conditioner and a water storage tank that are all connected with pipes. The switch-mode power supply unit, the air conditioner and the water storage tank are in communication with each other through the pipes. The switch-mode power supply unit includes a cabinet. Fixed plates are fixedly connected to an inner side wall of the cabinet and arranged at equal intervals. A top and a bottom of the cabinet and respective interiors of the fixed plates are formed with cavities. The pipes are in communication with the cavities. A fan is fixedly connected to a side wall of the water storage tank, and is matched with the water storage tank. A filter screen is insertedly connected to an inner side wall of the water storage tank. A filter cotton is horizontally provided under the filter screen.

A heat engine (10), particularly a heat pump, has a first heat exchanger (11), a compressor (12), a second heat exchanger (13), and a throttle device (14) connected by a refrigerant line (15), through which a refrigerant flows, and electronics (21, 22, 23) with power electronics for supplying power to and/or control electronics for controlling the heat engine (10). A heat transfer mechanism (24) absorb at least thermal energy emitted by the electronics (21, 22, 23) and transfer it to the refrigerant and/or, insofar as one exists, to a system medium flowing through the first or second heat exchanger.

The invention is about a waste heat re-cycle cooling system, has a Peltier device, a waste heat recycling circuit, and a processor. The Peltier device has a cold side close to room and a hot side, the cold side is connected to a cooling pipe, and a fan arranged on one side of the cooling pipe is configured to blow air over the cooling pipe to cool down air and then blow the cooling air into room. The processor is configured to control the Peltier device and the waste heat recycling circuit. The invention can effectively utilize the waste heat generated by cooling and improve the cooling efficiency.

A combined cycle power plant that includes a first gas turbine engine including a first turbine section, a second gas turbine engine including a second turbine section having an aft outlet configured to discharge an exhaust gas stream, an emissions reduction system configured to receive the exhaust gas stream discharged from the second gas turbine engine, and configured to remove oxides of nitrogen from the exhaust gas stream, and an interstage extraction system communicatively coupled with the first turbine section. The interstage extraction system is configured to selectively extract turbine extraction air from the first turbine section for providing heat to the emissions reduction system.