An emissions reduction system for a combined cycle power plant having a gas turbine engine and a heat recovery steam generator (HRSG) can comprise a duct defining a flow space configured to receive exhaust gas from the gas turbine and convey the exhaust gas into the HRSG, and a louver system coupled to the duct that can comprise a plurality of emission medium panels extending across the flow space, the emission medium panels configured to be moved between a first position where adjacent filter medium panels extend contiguously across the flow space of the duct and a second position where adjacent filter medium panels include spaces therebetween to provide an unobstructed flow path and an actuator to move the plurality of panels between the first position and the second position.

Exhaust systems for handling multiple effluent streams are described. Some embodiments include pressure drops to prevent perturbations from one effluent source from affecting a second effluent source. Some embodiments incorporate an exhaust assembly with multiple inlets and pumps and a single outlet. The exhaust assembly includes shared auxiliary components like purge and cooling systems.

Disclosed is a silencer for fuel cell vehicles. The silencer for fuel cell vehicles includes a housing having an inlet configured to receive air and hydrogen flowing into the housing therethrough, an outlet, and a condensation water drain hole configured to discharge condensation water to the outside therethrough, a distribution plate disposed in the housing and having distribution holes to distribute air and hydrogen flowing into the housing, a rotary plate disposed in the housing closer to the outlet than the distribution plate, a motor connected to the rotary plate to rotate the rotary plate, and an anti-freezing unit extending from one end of the rotary plate to the condensation water drain hole.

A cleaning system for removal of contaminants from a surface of a vehicle component exposed to a gas or fluid flow, the cleaning system comprising: an excitation device adapted to be attached to the vehicle component in the vicinity of the surface exposed to contaminants, wherein the excitation device is configured to cause the surface to mechanically vibrate by transferring a vibrational excitation to the surface; wherein the frequency of the vibrational excitation is controllable to be based on the configuration of the vehicle component as well as other modelled/measured parameters.

An emissions reduction system for a combined cycle power plant having a gas turbine engine and a heat recovery steam generator (HRSG) can comprise a duct defining a flow space configured to receive exhaust gas from the gas turbine and convey the exhaust gas into the HRSG, and a louver system coupled to the duct that can comprise a plurality of emission medium panels extending across the flow space, the emission medium panels configured to be moved between a first position where adjacent filter medium panels extend contiguously across the flow space of the duct and a second position where adjacent filter medium panels include spaces therebetween to provide an unobstructed flow path and an actuator to move the plurality of panels between the first position and the second position.

An engine system may include an intake line, and a cylinder deactivation (CDA) device selectively deactivating a portion of combustion chambers in the engine. The engine system may further include a first exhaust manifold connected to a first plurality of combustion chambers mounted with the CDA device, a second exhaust manifold connected to a second plurality of combustion chambers without the CDA device, a first exhaust line connected to the first exhaust manifold, a second exhaust line connected to the second exhaust manifold, and a third exhaust line connected with the first and second exhaust lines through an exhaust gas processing device. In addition, a turbocharger including a turbine is mounted at the first exhaust line and rotated by exhaust gas. An air injection device may supply air to the second exhaust manifold or the second exhaust line in a catalyst heating mode of the exhaust gas processing device.

Methods and systems are provided for regeneration of a particulate filter including a filter body having a filter paper looped along a plurality of rolling guides. At least one rolling guide may be a roller heater having a motor and a heater. Activation of the roller heater based on a pressure difference across the particulate filter regenerates the particulate filter during a regeneration phase and positions a regenerated section of the filter paper for trapping soot in a subsequent soot loading phase.

An airflow control system for a gas turbine system according to an embodiment includes: an airflow generation system for attachment to a rotatable expander shaft of a gas turbine system, downstream of the gas turbine system, for drawing in a flow of ambient air through an air intake section into a mixing area; and an eductor nozzle for attachment to a downstream end of the turbine component for receiving an exhaust gas stream produced by the gas turbine system and for drawing in a flow of ambient air through the air intake section into the mixing area, the exhaust gas stream passing through the eductor nozzle into the mixing area; wherein, in the mixing area, the exhaust gas stream mixes with the flow of ambient air drawn in by the airflow generation system and the flow of ambient air drawn in by the eductor nozzle to reduce a temperature of the exhaust gas stream.

Particulate matter in exhaust is treated with a novel configuration. An exhaust purifying apparatus of the present invention includes a flow generating device and a treatment device. The flow generating device includes a discharge electrode arranged inside of a tubular outer shell forming a flow passage in which exhaust containing the particulate matter flows. The discharge electrode is configured to generate the flow of the particulate matter from the discharge electrode side to the outer shell side by voltage application. The treatment device includes a space defining member and a treatment electrode. The space defining member is arranged between the discharge electrode and the outer shell to define a treatment space between the outer shell and the space defining member, and is configured to allow the inflow of the particulate matter into the space. Upon treating the particulate matter, the voltage application is performed to the treatment electrode.

An engine system may include an engine, an intake line, a cylinder deactivation (CDA) device mounted at a portion of combustion chambers, a first exhaust manifold connected to combustion chambers mounted with the CDA device, a second exhaust manifold connected to combustion chambers without the CDA device, a first exhaust line flowing exhaust gas exhausted from the first exhaust manifold, a second exhaust line flowing exhaust gas exhausted from the second exhaust manifold, a main exhaust line to which the first exhaust line and the second exhaust line are joined, an exhaust gas processing device at which the main exhaust line is installed, a turbocharger mounted at the first exhaust line, an electric supercharger installed at the intake line to supply supercharged air to the combustion chamber and an electric compressor, and an air injection device supplying the fresh air to the second exhaust manifold or the second exhaust line.