Abstract: A novel ultrasonic pump system using a series of cylindrical ultrasonic transducers comprising an inner cylinder component that propagates ultrasound in an omni-directional pattern emanating from the outer surface of the inner transducer component. Further, it also comprises an outer cylinder component that propagates ultrasound in an omni-directional pattern emanating from the inner surface of the outer transducer component. The inner cylinder component is placed parallel within the outer cylinder component, the outer cylinder component having a hollow inner cylindrical diameter greater than the outer cylindrical diameter of the inner hollow cylinder component. This allows for and equi-distant hollow spacing parameter between the inner surface of the outer hollow cylinder, and the outer surface of the inner hollow cylinder component.

Abstract: The invention is an apparatus for moving reservoir fluids from an underground reservoir using a wellbore extending from the surface to an end beneath the surface, wherein the wellbore communicates with the reservoir such that reservoir fluids enter the wellbore and separate into a liquid phase and a gas phase at a gas pressure. The apparatus includes a first pump, for containing within the wellbore in communication with the liquid, for pumping the liquid phase. The apparatus further includes a pump drive, for containing within the wellbore, operably connected to the first pump for driving the first pump. The pump drive is powered using the gas pressure of the gas phase in the wellbore. An intake communicates with the gas phase in the wellbore and directs the gas phase to the pump drive in order to power the pump drive, while an exhaust directs the gas phase from the pump drive. Further, the invention is a method for moving reservoir fluids from an underground reservoir using a wellbore.

Abstract: In a power generating plant which utilizes fuel gas for combustion at a predetermined pressure to drive a primary load, and where the fuel gas is supplied at a pressure higher than the predetermined pressure, an improvement is provided wherein a fuel gas expander is located downstream of a source of the fuel gas and upstream of a combustor for decreasing the pressure of the fuel gas, and wherein excess energy from the expander is used to drive a secondary load.

Abstract: A precision pumping device for aspirating and dispensing different volumes of fluid is presented. The precision pumping device comprises a housing with integral anti-rotation guides, a stepper motor which drives a fine pitch lead screw, a coupling for linking the piston to the leadscrew, an anti-backlash leadscrew follower, a split hub clamp nut, and a nut for securing the chamber to the housing. A seal is provided which seals around the piston and against the chamber, as is an o-ring that is set into a groove in the chamber and seals against a flange of the seal. The precision pumping device further includes a piston and a chamber for receiving at least a portion of the piston therein. The piston and chamber are of different sizes for aspirating and dispensing different volumes of fluid. The chamber can include a single port or multiple ports.

Abstract: A pump having a pump chamber arranged to receive liquid to be pumped and air, a delivery pipe for delivery of the liquid by the air to a location remote from said pump chamber, an air pipe for flow of air therein. The delivery pipe and pump chamber are in fluid communication, as are the air pipe and said pump chamber. A first air flow control to control air flow via said air pipe during first and second stages of a pumping cycle of the pump. A timer controls the operation of said first air flow control to thereby set the durations of said first and second stages of said pumping cycle. A first valve allows liquid to enter said pump chamber. Wherein in said first stage of the pumping cycle of the pump, the first air flow control allows air to be directed via said air pipe to said pump chamber for a time period set by said timer to cause liquid to be pushed from said pump chamber into said delivery pipe with the air for delivery via said delivery pipe to said location.

Abstract: A pump system suitable for pumping a hot medium, such as hot mixtures of liquid and solid substances (slurries), includes at least one displacement pump, such as a membrane pump, at least one bidirectional flow pipe, and a second pipe connected to the pump chamber of the displacement pump. The bidirectional flow pipe is connected at a first end to a first and a second one-way valve. A supply pipe for drawing an amount of medium from the supply pipe is connected to the bidirectional flow pipe via the first one-way valve and a discharge pipe for discharging an identical amount of medium from the bidirectional flow pipe is connected to the bidirectional flow pipe via the second one-way valve. The second pipe is provided in a horizontal plane. The displacement pump is associated with an expansion accommodating feature to allow the displacement pump to move when the bidirectional flow pipe or second pipe expand. A partition element is provided in the bidirectional flow pipe to restrict flow through the pipe.

Abstract: A high pressure reciprocating pump (10) for high fluid pressures between 30,000 and 60,000 psi and having a valve cartridge (57) positioned within a manifold block (15) of the pump (10). The valve cartridge (57) has a fixed body (58) with a plurality of equally spaced suction opening (69) extending therethrough. A central bore (70) of the valve cartridge body (58) has a valve assembly (72) mounted therein. Valve assembly (72) include a discharge valve member (74) and a suction valve member (80) mounted for sliding movement about the outer surface of discharge valve member (74). A spring (84) biased between discharge valve member (74) and suction valve member (80) continuously urges the valve members (74, 80) toward closed position. On the suction stroke, suction valve member (80) is opened and fluid through suction openings (69) enters the pump chamber (37).

Abstract: In a pump chassis (112), spring-loaded members (108a, 108b) engage a pumping cassette (114) to it in a predetermined position. The members each include pairs of latches (110a, 110b) that are each beveled to form a ramp so that the latches and associated members are forced outwardly to enable the pumping cassette to be seated within the pump chassis. The latches engage the pump cassette as it is seated, holding it securely. A release button (138) is attached to a spring-loaded shaft (144) that extends into the interior of the pump chassis. The shaft has a ramp formed on its inner end. When the user depresses the release button, the ramp rides under inwardly extending arms (162a, 162b) provided on the members, forcing the members and attached latches to move outwardly. As the members move outwardly, the pumping cassette is released and readily removed.

Abstract: A scroll-type variable-capacity compressor is disclosed in which a single spool is moved to open or close bypass ports and thereby change the capacity of compression chambers. Especially, the capacity can be controlled in satisfactory manner by opening the bypass ports to a specific position. Specifically, a first bypass port is arranged in the neighborhood of the contact point between the inner surface of the spiral wall of a fixed scroll and the outer surface of the spiral wall of a movable scroll making up one of the compression chambers with the capacity thereof reduced to a predetermined level. A second bypass port is arranged at a position on the side beyond a discharge port from the first bypass port but where the discharge port is not located on the line connecting the particular position and the first bypass port.

Abstract: A method and apparatus for operating a gas turbine installation combustion chamber with liquid fuel, by means of which the NOX are similar to those for gaseous fuels. The liquid fuel (38) is evaporated in two steps in an evaporative reactor (12). The liquid fuel (38) is first atomized to a fuel vapor/liquid fuel mixture (61) by direct heat exchange with a first heat exchange medium (21). The evaporation of the remaining residue of the liquid fuel (38) takes place by indirect heat exchange with a second heat exchange medium (51). An evaporative reactor (12) is arranged which accommodates, at its inlet end, a dual-fluid nozzle (22) connected both to a liquid fuel line (19) and to a supply line (20) for a first heat exchange medium (21).

Abstract: A variable capacity swash plate type compressor 10 incorporates a swash plate 34 to effect movement of at least an associated piston 44 to vary the capacity of the compressor 10. The structure of the swash plate 34 and piston 44 minimize the bending moment exerted on the piston 44 during operation.

Abstract: Lift pump guard for a pump operable by an electrical motor. The lift pump guard monitors variable parameters and actuates a relay to electrically terminate operation of the pump motor when the pump is dry running. Also a method of protecting a pump from dry running compares a measured parameter to a predetermined value and terminates operation based on the comparison.

Abstract: A refrigerant circuit includes a compressor and an expansion valve. The expansion valve is connected to a discharge muffler of the compressor by a high pressure conduit. The expansion valve is also connected to a suction passage of the compressor by a low pressure conduit. The high pressure conduit includes a condenser and the low pressure conduit includes an evaporator. A check valve is located between the discharge muffler and the high pressure conduit to selectively connect and disconnect the high pressure conduit with the discharge muffler. A relief valve is attached to the discharge muffler upstream of the check valve. If the pressure in the compressor is abnormally high when the check valve closes, the relief valve releases the abnormally high pressure from the discharge muffler. Therefore, if the check valve fails to function, the relief valve prevents the pressure in the compressor from being abnormally high.

Abstract: The invention relates to a hydraulic delivery device with a displacement unit which delivers a medium from a suction connection under output pressure to a pressure connection, connectable with a consumer, and under consumer pressure, and a regulating device for setting and/or limiting a volume flow delivered by the delivery device.

Abstract: A floating brush seal useful in a stationary gas turbine engine having a first rotary compressor component having a rotor having a land region, a second non-rotary component having an end extending over and around at least a portion of the land region with the floating brush seal being positioned between the first and the second component to substantially reduce the flow of air between the first and second component. A method for controlling the flow of cooling air into a chamber in the second component using the rotary brush seal is disclosed.

Abstract: A control and method is provided that continuously adjusts fuel sensitive schedules in the ECU for changes in the heating value of the fuel being combusted by the engine. The control and method includes calculating, as the engine is running, an expected fuel flow for a baseline fuel type and an actual fuel flow. A ratio of these two fuel flows is determined and applied to the heating value of a baseline fuel type that is preprogrammed into the ECU. This results in a scale factor that is then applied to fuel sensitive schedules in the ECU.

Abstract: A gas turbine operational strategy is provided for the optimization of ISO-Day rated performance. The invention is realized by setting the nominal operating line equal to or slightly below the operating limit line, so that ISO full load performance is maximized. Thus, the first stage turbine nozzle throat area is sized such that, without inlet bleed heat addition, and at Base-Load pressure ratio and firing temperature, the compressor operates within its operational limits on a ISO day. As ambient conditions change, levels of inlet bleed heat and firing temperature are controlled and the inlet guide vane angle is set whereby the nominal operating line is equal to or slightly below the operating limit line.

Abstract: A two-cylinder air compressor has a motor with a through drive shaft. Identical housings are provided at each end of a cylindrical spacer sleeve that surrounds the motor. The housings include cylinder housing extensions each of which mounts a cylinder sleeve, a valve plate and a head. The heads are part of a one-piece cylinder head member. Wobble pistons are mounted on each end of the motor shaft and operate in the cylinder sleeves. The cylinder sleeves rest on a floor in the housing which has integrally formed passages for cooling air to circulate around the cylinder sleeves. The one-piece cylinder head member includes integral tubes connecting the heads. The integral tubes span the distance between the heads and are spaced from the outside of the spacer. The housings may be joined by through bolts or without bolts by press fitting the bearings in the housing, press fitting the housings to the spacer sleeve, and press fitting the motor shaft into the bearings.

Abstract: Improved membrane valve for transferring fluids or gases in hermetic or semi-hermetic compressors, including a method and system for manufacturing a membrane valve and a membrane valve with applications for use in several motors, particularly in hermetic or semi-hermetic compressors which use, as a refrigeration fluid, an appropriate type of gas thus promoting the refrigeration physical affect. The above mentioned gas is to be transferred from one chamber to the other, according to a pre-determined frequency, when utilized in conjunction with a piston. A body and a membrane are produced from substantially thin metallic plates separately in accordance to an available process and subjected to rounding in order to eliminate live comers, and then juxtaposed thus composing the valve, with the above mentioned membrane on one side, fitted to the body which is fixed through a connection process and, on the other side, left free to oscillate, thus allowing the passage of a fluid such as a refrigeration gas.

Abstract: A gas turbine combined plant, a method of operating the same, and a steam-cooling system for a gas turbine hot section are provided, whereby the generation of thermal stress can be utmost reduced. A gas turbine hot section steam cooling system (30) is designed to cool a hot section (8) of a gas turbine unit (1) by the steam of an exhaust heat recovery boiler (2) and to supply the steam after cooling into a steam turbine (23). The system (30) comprises: a temperature detectors (15, 16) for detecting the outlet temperature of the steam of the gas turbine hot section and the outlet temperature of the steam of the exhaust heat recovery boiler, respectively, at the start-up time of the gas turbine; and a shielding valve (20) disposed to a pipe (12a) supplying the steam after cooling the gas turbine hot section to the steam turbine for shielding the steam after cooling in the case where there is a substantial difference between the both temperature levels.