Abstract: A gas turbine engine having a waste heat recovery system is provided. The gas turbine engine includes a compressor section, a combustion section, a turbine section, and an exhaust section in serial flow order and together defining a core air flowpath, the exhaust section including a primary exhaust flowpath and a waste heat recovery flowpath parallel to the primary exhaust flowpath; and the waste heat recovery system includes a heat source exchanger positioned in thermal communication with a first portion of the waste heat recovery flowpath.

Abstract: A gas turbine engine having a waste heat recovery system is provided. The gas turbine engine includes a compressor section, a combustion section, a turbine section, and an exhaust section in serial flow order and together defining a core air flowpath, the exhaust section including a primary exhaust flowpath and a waste heat recovery flowpath parallel to the primary exhaust flowpath; and the waste heat recovery system includes a heat source exchanger positioned in thermal communication with a first portion of the waste heat recovery flowpath.

Abstract: A radiation detector operating at high temperatures is shown comprising a scintillating material for producing light when excited by incident radiation, a photocathode, and an electron multiplier. The photocathode is deposited directly onto the surface of the scintillating material that is oriented toward the electron multiplier. Depositing the photocathode directly on the surface greatly decreases photon loss which is a problem of prior art systems. In a preferred embodiment, a metal flange is hermetically sealed to the scintillating material and this is fusion welded to the electron multiplier to create a vacuum envelope. This invention is particularly useful in noisy environments such as downhole in a drilling operation.

Abstract: A radiation detector operating at high temperatures is shown comprising a scintillating material for producing light when excited by incident radiation, a photocathode, and an electron multiplier. The photocathode is deposited directly onto the surface of the scintillating material that is oriented toward the electron multiplier. Depositing the photocathode directly on the surface greatly decreases photon loss which is a problem of prior art systems. In a preferred embodiment, a metal flange is hermetically sealed to the scintillating material and this is fusion welded to the electron multiplier to create a vacuum envelope.

Abstract: An LuAP scintillation detector and a method for improving the light output and uniformity of an LuAP scintillator crystal is provided, wherein the method includes disposing the scintillator crystal in a predetermined environment at a threshold temperature to generate an initial scintillator crystal, annealing the initial scintillator crystal in the predetermined environment at the threshold temperature to create an annealed scintillator crystal and cooling the annealed scintillator crystal in the predetermined environment to a final temperature.

Abstract: A hydrophilic semipermeable membrane can include a porous polymeric structure containing a blend of PVDF and hydroxyalkylcellulose. The membrane may be used for ultrafiltration. A method of making a hydrophilic semipermeable membrane can include providing a blend containing PVDF and hydroxyalkylcellulose, forming the blend into a porous polymeric structure, and purifying the porous polymeric structure.

Abstract: An LuAP scintillation detector and a method for improving the light output and uniformity of an LuAP scintillator crystal is provided, wherein the method includes disposing the scintillator crystal in a predetermined environment at a threshold temperature to generate an initial scintillator crystal, annealing the initial scintillator crystal in the predetermined environment at the threshold temperature to create an annealed scintillator crystal and cooling the annealed scintillator crystal in the predetermined environment to a final temperature.

Abstract: A radiation detector operating at high temperatures is shown comprising a LuAP scintillating material for producing light when excited by incident radiation, a photocathode, and an electron multiplier. The photocathode is deposited directly onto the surface of the scintillating material that is oriented toward the electron multiplier. In a preferred embodiment, a metal flange is hermetically sealed to the scintillating material and this is fusion welded to the electron multiplier to create a vacuum envelope. This invention is particularly useful in high temperature noisy environments such as downhole operations to detect radiation within a well hole.

Abstract: A radiation detector operating at high temperatures is shown comprising a scintillating material for producing light when excited by incident radiation, a photocathode, and an electron multiplier. The photocathode is deposited directly onto the surface of the scintillating material that is oriented toward the electron multiplier. Depositing the photocathode directly on the surface greatly decreases photon loss which is a problem of prior art systems. In a preferred embodiment, a metal flange is hermetically sealed to the scintillating material and this is fusion welded to the electron multiplier to create a vacuum envelope.

Abstract: A hydrophilic semipermeable membrane can include a porous polymeric structure containing a blend of PVDF and hydroxyalkylcellulose. The membrane may be used for ultrafiltration. A method of making a hydrophilic semipermeable membrane can include providing a blend containing PVDF and hydroxyalkylcellulose, forming the blend into a porous polymeric structure, and purifying the porous polymeric structure.

Abstract: An unsupported fluorocarbon copolymer membrane is made unsupported by using a combination of two distinctly different processes: the first is an annealing heat treatment, and the second is a polymerization process using ultra-violet (UV) light and acrylate monomers (UV/Acrylic process) that may also make the membrane hydrophilic.

Abstract: The present invention is directed to a system and method for removing a first chemical from a web of filtration membrane material using a vacuum roller or other vacuum pressure application device. Embodiments of the method involve applying vacuum pressure to a surface of the membrane web, immersing said membrane web in a flushing chemical and removing the membrane web from the flushing chemical. Embodiments of the system may include one or more vacuum rollers, positioning rollers and a flushing chemical in which a portion of the membrane web may be immersed.

Abstract: A bag making machine including a film web supply roll, a draw roll for drawing the film web to a bag forming section, a seal bar in the bag forming section of the bag making machine for sealing the drawn film web, and a tension control system, the tension control system including a surface drive roll, a surface drive roll servo, a vacuum box, a torque mode capstan, a capstan servo drive, a draw roll servo drive, and a controller programable to control the film web tension in a first run of the film web between the supply roll and the torque mode capstan independently from the tension in a second run of the film web between the capstan and the draw roll.

Abstract: The present invention is directed to a filter element in which an undesired fluid flow path through the filter element is blocked. The present invention is also directed to a method for producing such a filter element. In embodiments of the invention, the filter element may be a spiral wound filter element with a filter membrane. The desired flow path through the filter membrane may be through the lateral surface of the filter membrane, while an undesirable flow path may begin at a point on the cross-sectional face of the filter membrane. To prevent fluid from entering the filter membrane through the cross-sectional face, the pores of the filter membrane near the cross-sectional area may be sealed, for example, by filling the pores with a substance, such as a polymer.

Abstract: The present invention is directed to a filter element in which an undesired fluid flow path through the filter element is blocked. The present invention is also directed to a method for producing such a filter element. In embodiments of the invention, the filter element may be a spiral wound filter element with a filter membrane. The desired flow path through the filter membrane may be through the lateral surface of the filter membrane, while an undesirable flow path may begin at a point on the cross-sectional face of the filter membrane. To prevent fluid from entering the filter membrane through the cross-sectional face, the pores of the filter membrane near the cross-sectional area may be sealed, for example, by filling the pores with a substance, such as a polymer.

Abstract: A system and method for detecting defects in a porous material web or dense film applies differential pressure across the material web or film. The pores and defects in the material web or the defects in the dense film may be filled with a liquid. In embodiments of the invention, differential pressure may be applied using a vacuum roller or other vacuum pressure application device. When the differential pressure applied to the material web exceeds the bubble point pressure of a defect, the liquid within that defect may be removed. An image, such as a thermal or photographic image, of the material web is captured after the differential pressure has been applied across the material web or film. Removal of the liquid from a defect is indicated in the image, allowing defects to be detected.

Abstract: A process using acrylate monomers and ultraviolet light permits modification of porous polymeric materials without the use of a free radical initiator is described as is the material so modified. The modified polymeric material exhibits new properties such as wetability and advantageous flow characteristics that are useful in filtration.

Abstract: The present invention is directed to a system and method for removing a first chemical from a web of filtration membrane material using a vacuum roller or other vacuum pressure application device. Embodiments of the method involve applying vacuum pressure to a surface of the membrane web, immersing said membrane web in a flushing chemical and removing the membrane web from the flushing chemical. Embodiments of the system may include one or more vacuum rollers, positioning rollers and a flushing chemical in which a portion of the membrane web may be immersed.

Abstract: The present invention relates to a “poly” bag machine and, more particularly, to mechanisms for operating the seal bar component of such machines. The machine according to the invention includes a mechanism for reciprocatingly raising and lowering the sealing bar in which the movement and position of the sealing bar are controlled by the drive shaft and are selectively adjustable by one or two separate servo-drives. A main link is coupled to a seal bar drive shaft for movement in direct response to its rotation. A second link is movably coupled to the main link. A servo-drive system including a servo motor or servo valve is coupled to the second link for adjusting the position of the second link with respect to the main link while the main link is moving in response to the rotation of the drive shaft.

Abstract: A bag making machine having a plurality of components including a film web supply roll, a draw roll for drawing the film web to a bag forming section, a seal bar in the bag forming section of the bag making machine for sealing the drawn film web, and a tension control system for controlling the tension in the film web between the supply roll and the draw roll, the tension control system comprising: a surface drive roll for rotating the film web supply roll to pay out film web from the film web supply roll; a surface drive roll servo drive responsive to signals from a motion controller for controlling the position and rotation of the surface drive roll; a vacuum box situated between said web supply roll and said draw roll receivable of a loop of the film web under partial vacuum as the film web travels from said web supply roll to said draw roll; a torque mode capstan situated at an inlet side of said vacuum box engaging the film web and applying tension to the film web supplied from said film web supply roll;