Abstract: A concentrated solar energy collection system includes an array of heliostats and a solar receiver that further includes a plurality of tubes having at least one inlet and at least one outlet for carrying a heat transfer fluid (HTF). A flow control arrangement is provided for controlling the flow of HTF through the tubes. This includes at least one radiation sensor such as a pyranometer for sensing values representative of the aggregate solar radiation falling on the solar receiver via the heliostats. At least one temperature sensor measures input temperature of the HTF at or near the inlet. A controller coupled to the radiation and temperature sensors regulates the outlet temperature of the HTF by controlling the flow of HTF through the tubes via the flow control arrangement. A pressure differential sensor arrangement measures pressure differential across the flow control arrangement, providing an input to the controller.

Abstract: The invention relates to a heliostat sub-assembly and to a method of forming such a sub-assembly. The method of mounting a concave mirror to a supporting structure of a heliostat includes the steps of bonding a plurality of risers at predetermined spaced intervals to a rear face of the mirror, each riser having a bonding pad and a stem extending from the bonding pad, and applying a predetermined concave curvature to the mirror by conforming the front face of the mirror with a convex forming jig or die. The supporting structure and curved mirror are then aligned, and the supporting structure is clinched to the stems of the risers when the curved mirror is conformed with the forming die.

Abstract: A concentrated solar thermal receiver is mounted on a tower to receive concentrated solar thermal energy from a concentrating array of solar reflectors. The receiver comprises a single layered array of tubes configured to carry a heat transfer fluid such as sodium and defining in combination an exposed concentrated solar thermal energy receiving surface. The array of tubes have a lower fluid inlet header communicating with an inlet conduit, and an upper fluid outlet communicating with an outlet conduit. The tubes are arranged in a serpentine configuration and define a fluid flow path which is predominantly transverse and upward. The receiver includes a thermally insulating cover movable between an open position and a closed position in which the solar thermal energy receiving surface is covered to block or reduce the incidence of solar flux on the tubes or to reduce heat loss from the array of tubes when they are not operational.

Abstract: Methods of forming organic molecules comprising contacting a hydrolase enzyme with an organic reactant are provided. Methods for forming an organosilicon molecule comprising contacting a hydrolase enzyme with an organosilicon reactant are also provided.

Abstract: Methods for forming organosilicon esters and amides are provided. Additionally, organosilicon esters and amides are provided. The organosilicon esters and amides may be formed by contacting a hydrolase enzyme with an organosilicon reactant and an organic reactant. The enzyme may catalyze the formation of an ester bond between carboxylic acid, ester, or amide functional groups of the organosilicon or organic reactant and alcohol functional groups of the organic or organosilicon reactant. The enzyme may catalyze the formation of an amide bond between carboxylic acid, ester, or amide functional groups of the organosilicon or organic reactant and amine functional groups of the organic or organosilicon reactant.

Abstract: Methods for forming structurally defined organosilicon carbohydrates are provided. Additionally, structurally defined organosilicon carbohydrates are provided. The structurally defined organosilicon carbohydrates may be formed by contacting a hydrolase enzyme with an organosilicon reactant and a carbohydrate reactant. The enzyme may catalyze the formation of an ester bond between carboxylic acid, ester, or amide functional groups of the organosilicon or carbohydrate reactant and alcohol functional groups of the carbohydrate or organosilicon reactant. The enzyme may catalyze the formation of an amide bond between carboxylic acid, ester, or amide functional groups of the organosilicon or carbohydrate reactant and amine functional groups of the carbohydrate or organosilicon reactant.

Abstract: In order to provide a converter station for a high-voltage DC connection between two three-phase AC voltage networks, having a converter building which has a number of floors, and in which transformer units, converter devices, filter units, a gas-insulated switchgear assembly with feeder units, at least one cooling system, a DC cable pot head for electrical connection of a high-voltage cable carrying direct current, a smoothing reactor and gas-insulated busbars for electrical connection of these components are arranged, while maintaining its compact design and the arrangement of its components in a closed building, whose cost is low and which has a physically simple design, the invention proposes that the DC cable pot head and the smoothing reactor are arranged on the same floor as the converter valves and are electrically connected to one another via an air-insulated connecting device, with an air-insulated isolating switch being provided in order to produce an isolating gap between the DC cable pot head and

Abstract: The invention concerns a method for accurately determining the position of geographical measuring points and linking the data of these measuring points with further data as well as making the data thus linked available in electronic form. First, geographical measuring points are designated on site and the corresponding coordinates of these measuring points are determined. Following this, a real marker, for example in the form of a seal, or a virtual marker is assigned to each measuring point. The address data of the measuring points and the corresponding coordinates is then stored in a database (2). This data is supplemented with further commercial data, such as for example product and/or service information, and is made available for use to a client who communicates with the database (2) using, for example, a transmitting and receiving device (1).

Abstract: Methods for forming organosilicon esters and amides are provided. Additionally, organosilicon esters and amides are provided. The organosilicon esters and amides may be formed by contacting a hydrolase enzyme with an organosilicon reactant and an organic reactant. The enzyme may catalyze the formation of an ester bond between carboxylic acid, ester, or amide functional groups of the organosilicon or organic reactant and alcohol functional groups of the organic or organosilicon reactant. The enzyme may catalyze the formation of an amide bond between carboxylic acid, ester, or amide functional groups of the organosilicon or organic reactant and amine functional groups of the organic or organosilicon reactant.

Abstract: Methods for forming structurally defined organosilicon carbohydrates are provided. Additionally, structurally defined organosilicon carbohydrates are provided. The structurally defined organosilicon carbohydrates may be formed by contacting a hydrolase enzyme with an organosilicon reactant and a carbohydrate reactant. The enzyme may catalyze the formation of an ester bond between carboxylic acid, ester, or amide functional groups of the organosilicon or carbohydrate reactant and alcohol functional groups of the carbohydrate or organosilicon reactant. The enzyme may catalyze the formation of an amide bond between carboxylic acid, ester, or amide functional groups of the organosilicon or carbohydrate reactant and amine functional groups of the carbohydrate or organosilicon reactant.

Abstract: In order to provide a converter station (1) for a high-voltage DC connection between two three-phase AC voltage networks, having a converter building (2) which has a number of floors, and in which transformer units (21), converter devices (15), filter units (4, 9, 10, 11), a gas-insulated switchgear assembly with feeder units (6), at least one cooling system (16, 19, 22), a DC cable pot head (27) for electrical connection of a high-voltage cable carrying direct current, a smoothing reactor (26) and gas-insulated busbars (12) for electrical connection of these components are arranged, while maintaining its compact design and the arrangement of its components in a closed building, whose cost is low and which has a physically simple design, the invention proposes that the DC cable pot head (27) and the smoothing reactor (26) are arranged on the same floor as the converter valves (15) and are electrically connected to one another via air-insulated connecting means (28), with an air-insulated isolating switch (36)

Abstract: A Hydraulic Pumping Unit equipped with a flywheel, a high-slip electric motor and a reversible hydraulic pump such that during the downstroke of the Unit, the hydraulic pump operates as a hydraulic motor, accelerating the flywheel and accumulating in this way the energy of the downgoing rodstring in the form of kinetic energy.The interaction between the flywheel, electric motor and weight of the rodstring adjusts automatically the range of speed variation.The upward and downward speeds of the Hydraulic Pumping Unit can be adjusted by hand or automatically by electronically commanded step motors, in such a way that the Hydraulic Pumping Units adjusts itself to the varying conditions of the oilwell.

Abstract: In the regions of a drying zone within a tunnel (2) exposed to fire danger a sample of the air streams is drawn off via an intake pipe (11) disposed transversely to the longitudinal extent of the tunnel. The sample is supplied to a measuring device which contains two regeneratable filters which are alternatingly acted upon by the sample via switch-over valves. The measuring device contains a sensor acted upon by the cleansed gas which sensor reacts to CO and is connected to an alarm system and or an extinguisher device. From the extinguisher device an extinguisher agent line (16) leads to an extinguisher pipe (14) which is likewise in the direction of flow of the air steam guided through the tunnel (2) arranged transversely to the longitudinal extent of the tunnel (2) and provided with extinguisher agent exit nozzles.

Abstract: In the regions of a drying zone within a tunnel (2) exposed to fire danger a sample of the air streams is drawn off via an intake pipe (11) disposed transversely to the longitudinal extent of the tunnel. The sample is supplied to a measuring device which contains two regeneratable filters which are alternatingly acted upon by the sample via switch-over valves. The measuring device contains a sensor acted upon by the cleansed gas which sensor reacts to CO and is connected to an alarm system and or an extinguisher device. From the extinguisher device an extinguisher agent line (16) leads to an extinguisher pipe (14) which is likewise in the direction of flow of the air steam guided through the tunnel (2) arranged transversely to the longitudinal extent of the tunnel (2) and provided with extinguisher agent exit nozzles.