Abstract: A gas turbine engine includes a steam generating system, and a combustion section having a first combustor and a second combustor in fluid communication with a secondary combustion zone of the first combustor. The second combustor is operable to receive compressor bleed air and fuel, along with steam from the steam generating system. During a non-idle operating state and a power-augmentation operating state, when the steam system is operable, steam is provided to the second combustor and then to the secondary combustion zone of the first combustor. When the steam generating system is inoperable, the fuel and bleed air are provided to the second combustor and combusted, and combustion products are provided to the first combustor. When the steam generating system is partially operable, the steam, the bleed air, and the fuel are provided to the second combustor, and combustion products are provided to the first combustor.

Abstract: A cooking appliance including a main body forming a cooking chamber; a door configured to open and close the cooking chamber; and a hinge assembly which connects the main body and the door, wherein the hinge assembly includes a door bracket coupled to the door, a main body bracket coupled to the main body, a hinge link that connects the door bracket and the main body bracket, and supports the door bracket so as to be rotatable, and a locking member coupled to the hinge link. When the cooking chamber is closed by the door, the engaging portion is engaged with the main body bracket to fix a position of the door bracket, and, to prevent the engaging portion from deviating from the main body bracket, the deviation prevention portion interferes with the door bracket if the engaging portion moves in a direction away from the main body bracket.

Abstract: A method of operating an oven appliance includes determining that an access control mode is enabled, determining that a period of inactivity has occurred while the access control mode is enabled, activating the access control mode, the access control mode comprising providing a limited user interface input selection, detecting a user interaction with the oven appliance, determining that the user interaction is not in compliance with the access control mode, and implementing a responsive action in response to determining that the user interaction is not in compliance with the access control mode.

Abstract: An air conditioning system includes an indoor unit, an outdoor unit, a first expansion valve, a second expansion valve and a controller. The controller is configured to: control the air conditioning system to be switched to a cooling mode, control an indoor expansion valve and the second expansion valve to be closed and control the first expansion valve to be opened when a refrigerant leakage occurring indoors is obtained; control a compressor to be stopped and the first expansion valve to be closed, if the compressor satisfies a first preset condition; control the compressor to be started and the first expansion valve and the indoor expansion valve to be opened, if the refrigerant leakage continues indoors after controlling the compressor to be stopped; and control the compressor to be stopped and the first expansion valve to be closed, if the compressor again satisfies the first preset condition.

Abstract: A method for controlling an air conditioner, an air conditioner and a computer-readable storage medium are provided. The method includes: obtaining at least two predicted control parameter combinations for a current cycle prediction of the air conditioner and obtaining a historical control parameter combination of the air conditioner from a previous cycle operation; determining a target control parameter combination for the air conditioner according to parameter similarities between each of the predicted control parameter combinations and the historical control parameter combination; and controlling the air conditioner to operate according to the parameter values in the target control parameter combination.

Abstract: An apparatus for cooling one or more samples includes a cryostat with a first wall forming an inner chamber with an opening for receiving the one or more samples. A second wall forms an outer chamber adapted to insulate the inner chamber and a channel leading to the opening of the inner chamber. A seal selectively seals the opening to the inner chamber, and a cryocooler thermally links to the inner chamber, such as by way of a flexible strap. The inner chamber may entirely surround the outer chamber, and yet via the channel allow for the removal of the one or more samples from the inner chamber while maintaining the evacuated outer chamber. The inner chamber may also be fully contained within the outer chamber, which may be evacuated. Related methods are also disclosed.

Abstract: The present disclosure relates to a multi-circuit heating, ventilation, and air conditioning (“HVAC”) system for use with a first refrigerant in a first refrigerant circuit and a second refrigerant in a second refrigerant circuit. The second refrigerant circuit is fluidically isolated from the first refrigerant circuit. Additionally, a first sensor is operable to detect a leak of at least one of the first and second refrigerants or is operable to measure temperature or pressure from the first refrigerant circuit or the second refrigerant. The multi-circuit HVAC system further including a controller programmed to receive the measurement from the sensor to identify the circuit or circuits that are leaking, to turn off operation of the leaking circuit or circuits, and if only one circuit is leaking, operate only the other of the circuits.

Abstract: Lining pipes (103) are routinely pulled through HDD boreholes from one end. As HDD borehole distances get longer, the total amount of friction experienced by the pipe will increase and therefore greater forces/stresses are applied to the pipes (103). For a given material and diameter of pipe (103), conventionally, the only way to handle these stresses is to increase the wall thickness of the pipe (103). The present invention provides at least one gripping device (201) on a line (107), movable through the interior of a pipe (103), and configured to grip an interior of the pipe (103). In this way, the gripping device (201) may be used to grip a pipe (103) at a point spaced from an end thereof, thereby reducing tensile forces on the pipe.

Abstract: A system may include a built hydraulic fracturing system with a plurality of devices connected together and a simulation of the built hydraulic fracturing system on a software application. Additionally, a fracturing plan may be provided on the software application to include pre-made instructions to perform multiple processes in a hydraulic fracturing operation such as a sequence of valve operations to direct fluid flow through a selected path. Further, the fracturing plan may be modified to create a customized fracturing plan including the pre-made instructions and at least one modified instruction. Furthermore, the customized fracturing plan may be executed to perform at least one of the processes in the built hydraulic fracturing system.

Abstract: A drilling area network hub is located proximate to a drill rig and includes an uphole transceiver in bidirectional communication with a downhole transceiver by utilizing the drill string as an electrical conductor. Certain information is collected including rig-based and/or location information. At least one field report is generated based on the certain information to characterize at least one of an inground operation, an operational condition of the downhole transceiver, an operational condition of the uphole transceiver, and an operational condition of the drill rig. A drilling area network server receives the field report from the Internet at a remote location and can generate a custom report and/or recommended actions based on field data. Region specific parameters can be applied to the operation of a drilling system. The drilling area network hub can transfer data logs to the remote location according to assigned priorities.

Abstract: Embodiments presented provide for a method of analysis for methane leaks. The method of analysis includes performing a record generation event, performing a quality assessment of the record generation event, performing a linear cut generation procedure to create a linear cut generation data set, and performing a source term inversion using the linear cut generation data set.

Abstract: An aftertreatment temperature management system includes: an engine operative to combust a fuel; an aftertreatment system including an oxidation catalyst and operative to receive exhaust produced by the engine; a heat exchanger coupled to the aftertreatment system and operative to exchange heat between exhaust downstream of the oxidation catalyst and exhaust upstream of the oxidation catalyst; and an insulation at least partially enclosing the heat exchanger and the oxidation catalyst.

Abstract: A vehicle pump assembly 13 includes a pump 30 having a mechanical seal 35 sealing a cooling medium and a drain hose 50 attached to the pump 30. The pump 30 includes an introduction chamber 40 separated by the mechanical seal 35 and configured such that the cooling medium having leaked from the mechanical seal 35 is introduced thereinto, and the drain hose 50 communicates with the introduction chamber 40. The internal volume of the drain hose 50 is three times the volume of the introduction chamber 40 or more.

Abstract: A hydrogen engine using fuel gas containing hydrogen, including: a cylinder; a piston movable within the cylinder; a cylinder head forming a combustion chamber with the piston, and including an intake port connected to the combustion chamber and a fuel supply port connected to the combustion chamber; an intake valve for opening and closing the intake port; a fuel supply valve for opening and closing the fuel supply port; and a valve train commonly provided for the intake valve and the fuel supply valve, and configured to open and close the intake valve and the fuel supply valve in conjunction with each other. The hydrogen engine is configured such that a valve opening timing of the fuel supply valve is more retarded than a valve opening timing of the intake valve.

Abstract: A gas turbine engine has a turbomachine comprising compressor, combustion, and turbine sections. The gas turbine engine defines a maximum exhaust gas temperature, a maximum drive turbine shaft torque, and a corrected specific power. The gas turbine engine includes a nozzle vane and an engine casing defining a fluid supply plenum. The engine casing is configured to route cooling fluid from the fluid supply plenum to the nozzle vane. The routing of the cooling fluid facilitates cooling of the nozzle vane and increases an overall pressure ratio of the gas turbine engine. Integration of the cooling fluid routing within the engine casing reduces parasitic bleed air losses, enables tighter turbine stage spacing, and improves the thermal efficiency of the engine, thereby enhancing performance at elevated pressure ratios.

Abstract: A cyclonic separator for a gas turbine engine includes a housing, a fluid inlet, a first fluid outlet, a second fluid outlet, and a particle separator. The housing includes a first end, a second end, and an outer wall extending between the first end and the second end. The fluid inlet is disposed at the first end of the housing. The first fluid outlet is disposed at the second end of the housing. The second fluid outlet is disposed in the outer wall downstream of the first end of the housing and extends outward at least partially in the radial direction. The particle separator is disposed in the housing between the first end and the second end inward of the outer wall in the radial direction and extends in the circumferential direction. The particle separator defines a plurality of openings extending in the radial direction.

Abstract: A system includes a condensate injection system configured to fluidly couple to a combustion chamber of a reciprocating engine and an exhaust gas recirculation (EGR) system of the reciprocating engine. The condensate injection system includes a condensate tank configured to store condensate collected from the EGR system. The condensate injection system also includes a pump fluidly coupled to the condensate tank. The condensate injection system also includes an injector fluidly coupled to the pump. The injector is configured to inject condensate into the combustion chamber during a first portion of an engine cycle of the reciprocating engine. The first portion of the engine cycle includes at least part of a power stroke and/or an exhaust stroke of the engine cycle.

Abstract: An aircraft extending between a forward end and an aft end is provided. The aircraft includes an auxiliary power unit positioned proximate the aft end of the aircraft, the auxiliary power unit having an auxiliary power unit inlet duct and an auxiliary power unit exhaust duct, and a boundary layer ingestion fan positioned proximate the aft end of the aircraft, the boundary layer ingestion fan having a support shaft, wherein the auxiliary power unit exhaust duct extends through a portion of the support shaft of the boundary layer ingestion fan.

Abstract: A fuel filter apparatus for use within a liquid fuel in a fuel tank. The fuel filter apparatus can have an inlet screen that is generally long and slender, and a fuel pickup tube is attached to this fuel inlet screen and sealed so as not to leak. The fuel pickup tube is a one-piece tube that conveys clean fuel from a fuel source to a fuel pump. The fuel screen and pickup tube are oriented so that the long axis of the long slender screen is mounted vertical or at least oriented such that one end of the filter is located higher than the diameter of the filter with respect to gravity and located so that the end of the filter assembly stops against the bottom of the fuel tank to ensure positive indication of positioning.

Abstract: A power generation system may include an impoundment structure at least partially defined by a plurality of precast segments. At least one of the precast segments may include a precast form and at least one precast infill block. The power generation system may include a powerhouse. At the powerhouse, a fluid conduit is coupled to an intake tube and a draft tube in respective transition regions to enable fluid to flow into a power generating module to produce electrical power, and transition collar(s) may be employed to secure connectivity between the fluid conduit and the intake tube and the draft tube. The power generating module may be arranged such that an intake port is elevated with respect to a draft port at the power generating module. Sensors may be employed to monitor integrity of elements of the power generation system.