Showing papers on "Diffuser (sewage) published in 2014"

Backlight source and display device

Abstract: A backlight source and a display device are provided. The backlight source includes a backplate ( 1 ), a light source ( 2 ) and a diffuser plate ( 3 ). The light source ( 2 ) is provided on a face of the backplate ( 1 ), the diffuser plate ( 3 ) is parallel to the face of the backplate ( 1 ), and the diffuser plate ( 3 ) is provided at a side of the backplate ( 1 ), where the light source ( 2 ) is provided, and is opposite to light source ( 2 ); and a support pole ( 31 ) is further provided between the diffuser plate ( 3 ) and the backplate ( 1 ), and the support pole ( 31 ) and the diffuser plate ( 1 ) are made of a same material and formed integrally.

EGR device having baffle and EGR mixer for EGR device

Abstract: An EGR device includes a housing and a baffle. The housing has an outer pipe and a wall. The wall extends radially inward from an end of the outer pipe. The outer pipe defines an EGR inlet. The baffle is accommodated in the outer pipe. The baffle includes an inner pipe defining an inner passage internally and defining an annular passage externally with the outer pipe. The annular passage is configured to communicate with the EGR inlet. The housing has at least one diffuser extending from the wall. The at least one diffuser is located in the annular passage.

Microstructured diffuser comprising first microstructured layer and coating, optical stacks, and method

Abstract: A microstructured diffuser is described comprising a light transmissive film comprising a first microstructured surface comprising a plurality of peaks and valleys. A coating is disposed on the first microstructured surface. The coating partially fills the valleys forming a second microstructured surface.

Terminal device and air conditioning unit including the same

Abstract: PROBLEM TO BE SOLVED: To solve a problem of the need to perform time-consuming operation so as to blow out air from a diffuser of an indoor unit in an air direction with an air volume identical to those desired by a user.SOLUTION: If an imaging unit 50 of a terminal device 3 picks up an image of an air-conditioning target space to be air conditioned, the picked-up image is displayed on a display screen 52 of the terminal device 3. A virtual space image 60 corresponding to air blown out from a diffuser of an indoor unit 2a is also displayed on the display screen 52 of the terminal device 3 on the basis of operating information supplied from the indoor unit 2a. A user operates the terminal device 3 for changing an air direction and an air volume of the air blown out from the diffuser of the indoor unit by touching the display screen 52 on which the virtual space image 60 is displayed.

Numerical Quantification of Interaction Effects in a Closely-Coupled Diffuser-Fan System

Abstract: Distorted inflow conditions have been a plague for compression system operability and aeromechanics since the dawn of gas turbine engines. This will likely continue to be an issue for all systems, but modern inlet designs, particularly serpentine diffusers, accentuate the existing issues through the production of both total pressure deficits and flow angularity distortion. For the first time, unsteady, full annulus CFD analysis of a coupled diffuser-fan system was pursued to determine coupling effects between the serpentine diffuser and transonic fan stage. Additionally, the harmonic balance method was used for the first time to demonstrate development and transfer of the distortion. These efforts provided a novel demonstration of 3-D analysis using a generated distortion relevant to this class of inlet and engine. Prior distortion analyses have been conducted using prescribed inlet distortion fields typically matching experimental total pressure or bulk swirl profiles. In the present study, an offset serpentine diffuser was used, coupled directly with the fan stage, to generate the distortion pattern. The Star-CCM+ solver was used to complete mixing-plane, harmonic balance, and transient, full annulus simulations of the coupled system. Mixing plane analysis provided a computationally inexpensive way to assess a nominal mass flow rate at which the components were matched, but provided little additional information beyond a flow field initialization for the higher-fidelity methods. The ability of any distortion analysis method to compute the generation of total temperature and swirl distortion through the fan stage is critical. The harmonic balance and full annulus results show appropriate capture of the distortion transfer, generation of intra-stage total temperature distortion, as well as the impact of the turbomachinery upon the incoming flow field. Redistribution of the distorted flow entering the fan was captured reasonably well by the harmonic balance simulation. Entering the rotor region, however, the vortices

Parametric Studies of Pipe Diffuser on Performance of a Highly Loaded Centrifugal Compressor

Abstract: Pipe diffusers with several different geometries were designed for a highly loaded centrifugal compressor originally using a wedge diffuser. Parametric studies on the effect of pipe diffuser performance of a highly loaded centrifugal compressor by varying pipe diffuser inlet-to-impeller exit radius ratio, throat length, divergence angle, and throat area on centrifugal compressor performance were performed using a state-of-the-art multi-block flow solver. An optimum design of pipe diffuser was obtained from the parametric study, and the numerical results indicate that this pipe diffuser has remarkable advantageous effects on the compressor performance. Furthermore, a detailed comparison of flow visualization between the pipe diffuser and the wedge diffuser was conducted to identify the physical mechanism that account for the beneficial effects of the pipe diffuser on the performance and stability of the compressor. It was found that the performance enhancement afforded by the pipe diffuser is a result of the unique diffuse inlet flow pattern. Alleviating flow distortion in the diffuser inlet and reducing the possibility of a flow separation in discrete passages are the physical mechanisms responsible for improving the highly loaded centrifugal compressor performance.

Sensitivity study of diffuser angle and brim height parameters for the design of 3 kW Diffuser Augmented Wind Turbine

Abstract: Abstract The Diffuser Augmented Wind Turbine (DAWT) is an innovative mean to increase the power harvested by wind turbine. By encompassing the rotor with a diffusershaped duct it is possible to increase the flow speed through the turbine by about 40-50%. The study presents the development of a numerical model and its validation by the experiments performed in the wind tunnel of the Institute of Turbomachinery, TUL. Then, the numerical model is used for the geometry sensitivity study to optimize the shape of a diffuser. The paper presents that the DAWT technology has the potential to even double the power outcome of wind turbine when compared to a bare rotor version.

Smoker for grill

Abstract: A smoker for use with a grill, comprising a smoke-releasing material holder positionable between a heat source and food rack within a grill, at least one air diffuser positioned at least partially within the holder in air transmitting communication with the holder, and an air actuator coupled to the at least one air diffuser in air transmitting communication with the at least one air diffuser.

Abrasive handling submersible pump assembly diffuser

Abstract: An abrasive handling submersible pump assembly diffuser is described. An electric submersible pump assembly stage comprises a rotatable impeller, and a co-axially mounted diffuser comprising a diffuser bowl, the diffuser bowl comprising a plurality of diffuser bowl wedges having a blunted pie-shape, each of the plurality of diffuser bowl wedges protruding axially from a diffuser bowl floor into a cavity between the rotatable impeller and the co-axially mounted diffuser such that each of the plurality of diffuser bowl wedges protrudes into a path of pumped solid-laden fluid, wherein the blunted pie-shaped wedges extend radially between an inner wall and an outer wall of the diffuser bowl and a thickness of the blunted pie-shaped wedges in a circumferential direction increases towards the outer wall.

High-Efficiency Shrouded Micro Wind Turbine for Urban-Built Environment

Abstract: Shrouding (diffuser augmented) horizontal axis micro-wind turbine has been shown to be an effective ways to potentially increase the power output of micro wind turbine for applications in built environments. It is well understood that the degree of the performance enhancement depends on several factors including the diffuser shape and geometries, blade airfoils, and the wind condition at the turbine site. The effect of diffuser shape and geometries is reported in this paper. Computational fluid dynamic (CFD) simulations of a small wind turbine with a simple frustum diffuser shrouding have been carried out. The diffuser has been modeled with different shapes with the aim to understand the effect of length and area ratio on power augmentation phenomenon. The simulations provide some parameterized figures which present method to determine the beneficial range of frustum diffuser geometries for diffuser shrouded horizontal axis wind turbines.

Analytical Study of Vapour Compression Refrigeration System Using Diffuser and Subcooling

Abstract: This Paper Presents The Concept Of Analytical Study Ofvapour Compression Refrigeration System Using Diffuser And Subcoolingmainly Carried Out To Improve The Coefficient Of Performance Of System. To Improve The Coefficient Of Performance, It Is To Required That Compressor Work Should Decrease And Refrigerating Effect Should Increase. Initially The Diffuser Of Increasing Cross-Sectional Area Profile Was Designed, Fabricated And Introduced In Our VCR Apparatus. The Size Of Diffuser Selected Was Of 15 Degree Divergence Angle. . By Using Diffuser Power Consumption Is Less For Same Refrigerating Effect So Performance Is Improved. The Size Of The Condenser Can Also Be Reduced Due To More Heat Transfer. So Cost Of The Condenser Will Be Reduced.The Parameters Pressure And Temperature Were Measured. After Result Analysis, We Have Found That The COP Was Enhanced From2.65 To 3.38 In The Case When Conventional VCR System Was Used With Diffuser.

Water aeration system

Abstract: A water aeration system encases an air pump and a solar power controller in an encasement structure with one or more air permeable sidewalls. The encasement structure is mounted at or near a top end of a mounting pole. A solar panel is mounted directly or indirectly to the encasement or to the mounting pole at or near the top end of the mounting pole. An air conduit is threaded through a hollow channel in the mounting pole, and then underground and/or under water for joining to an immersed diffuser. The water aeration system operates without a battery or energy accumulator, and is tamper-resistant. The air pump and controller are inside the encasement structure, the solar panel and encasement structure are mounted several feet above the ground surface, and the conduit between the pump and the diffuser is held inside the mounting pole.

Diffuser plate connection structure ror led lighting lamp

Abstract: The present invention relates to a diffuser plate connection structure for an LED lamp and, more specifically, to the diffuser plate connection structure for an LED lamp which connects a diffuser plate to an LED lamp. The diffuser plate connection structure for the LED lamp comprises: a base plate in which a plurality of LED modules is mounted; a side plate which is integrally formed on the edge of the base plate; a border plate which is formed on the end of the side plate; a main frame which is mounted to be protruding to the outer side of the border plate and is made of a holder which is elastically returned; a side frame in which a diffuser plate is supported and fixated in the inner side and a fixing supporter which is supported and fixated on the holder is formed; and the diffuser plate which is fixated on the side frame and diffuses light emitted from the LED modules. The present invention includes a diffuser plate fixing member inside the main frame in which the LED module is attached and detached. The present invention attaches the side frame to the side of the main frame and fixates the diffuser plate to the top of the main frame using the diffuser plate fixing member and the side frame. Therefore, the diffuser plate can be attached to the LED lamp stably and be detached easily.

Back light unit and display device

Abstract: A backlight unit includes: a bottom chassis including a lower portion and side portions enclosing the lower portion; a light source plate to which a light source is attached; a diffuser configured to diffuse light generated from the light source; an optical sheet disposed on the diffuser and adapted to further diffuse the light diffused by the diffuser; and a first mold including a first inclined portion which is disposed between the diffuser and the optical sheet and may prevent the diffuser and the optical sheet from contacting each other, the first inclined portion may reflect light transmitted by the diffuser and emitted from the side of the diffuser toward the bottom chassis.

Supercritical dissolved gas cavitation device for strengthening reduction of sludge

Abstract: The utility model relates to a supercritical dissolved gas cavitation device for strengthening reduction of sludge, belonging to the technical field of urban sewage sludge treatment. When sludge flows through a contracting nozzle at a high speed, air is injected from an air suction tube to be mixed with sludge in a dissolved gas cavitation cavity, sequentially enters into a first diffuser and a secondary diffuser and then is sprayed into an oxidization reaction kettle from a cavitation nozzle, and finally, sludge subjected to dissolved gas cavitation is discharged from a sludge output pipe. The supercritical dissolved gas cavitation device can operate in combination with a biochemical reaction basin, a reflux and surplus sludge pool or a sludge homogenizing pool. As a target vortex cavitation generator is combined with the oxidization reaction kettle, conditions of supercritical wet oxidization reaction are achieved, so that degradation-resistant organic matters in the sludge can be directly decomposed to CO2, H2O and the like, and macromolecular chains of the degradation-resistant organic matters are broken to small molecular chains and the degradation-resistant organic matters are further oxidized to obtain fatty acids; therefore, the ratio of BOD/COD (Biochemical Oxygen Demand/Chemical Oxygen Demand) is improved, beneficial conditions for subsequent biochemical reactions are created, and the sludge is reduced. When the supercritical dissolved gas cavitation device and the method thereof are used by a sewage plant, the sludge output is reduced by 60%-70%.

Multistage centrifugal compressor

Abstract: A multistage centrifugal compressor comprises a spindle, impellers, a spacer bush, a thrust disc, a balance disc, a diaphragm coupling, a curve, a backflow device, a diffuser, an inlet and outlet volute chamber and a seal and is characterized in that the compressor is provided with multiple cascade-stage impellers, vanes of the rear impeller of every two adjacent impellers deflects for certain angles relative to vanes of the front impeller of every two adjacent impellers; the diffuser adopts combination of a vaneless diffuser and a vane diffuser, the vaneless diffuser is in front of the vane diffuser; an air inlet way composed of an inner ring, an outer ring, a side plate and adjustable guide vanes is adopted; the inlet and outlet volute chamber provided with reinforcing ribs on two sides of a partition plate is adopted; an air seal body is sealed in a split mode and assembled integrally; an oil seal group structure provided with a certain-taper oblique plane on the inner wall of a seal ring is adopted. The multistage centrifugal compressor can stably work in a wide working range, can be well suitable for various different working environments and working media and wins consistent high praise from customers.

Optimization of valveless micropump for drug delivery

Abstract: With controlled drug delivery system, appropriate and effective amount of drug can be precisely delivered at appropriate time by a micropump. This is achieved with the use of diffuser and nozzle elements that eliminate the need for valve mechanism simplifying the micropump design and fabrication. A preliminary valveless micropump prototype has been demonstrated and the systematic optimization to improve the performance at low Reynolds number (Re <; 100), typical in drug delivery system, is presented here.

Pressure-bearing emergency cooling device

Abstract: The utility model discloses a pressure-bearing emergency cooling device. The pressure-bearing emergency cooling device comprises a tank body. An upper diffuser and an upper water distribution pipe are arranged on an upper water distributor on the upper portion of the tank body. The upper water distribution pipe is communicated with a chilled water return pipeline through a hot water pipeline. A lower diffuser and a lower water distribution pipe are arranged on a lower water distributor on the lower portion of the tank body. The lower water distribution pipe is communicated with a chilled water outlet pipeline through a cold water pipeline. In the cold accumulation or discharge process, the water flow directions of the chilled water or hot water on the upper diffuser, the upper water distribution pipe, the lower diffuser and the lower water distribution pipe are different. The tank body is effectively combined with the upper water distributor and the lower water distributor, and in other words, cold accumulation or discharge is achieved by changing the water flow directions of the upper diffuser, the upper water distribution pipe, the lower diffuser and the lower water distribution pipe. Cold accumulation and discharge can be achieved without relying on the size characteristic of the tank body, the height-diameter ratio is reasonable, no plate type heat exchanger is needed for heat exchange, and therefore cost is low, and disaster prevention safety is high.

Hybrid diffuser case for a gas turbine engine combustor

Abstract: A hybrid diffuser case for a gas turbine engine includes an outer diffuser case wall that extends downstream from an annular outer pre-diffuser case shroud. An inner diffuser case wall extends downstream from an annular inner pre-diffuser case shroud. A multiple of struts extend between the annular outer pre-diffuser case shroud and the annular inner pre-diffuser case shroud.

Exhaust diffuser for a gas turbine engine exhaust system

Abstract: An exhaust diffuser for a gas turbine engine includes a diffuser inlet, a diffuser exit, an inner diffuser wall, and an outer diffuser wall. The inner diffuser wall may include a first tubular member with a flared downstream portion. The outer diffuser wall may include a second tubular member at least partially about the inner diffuser wall and with a second flared downstream portion. The outer diffuser wall and the inner diffuser wall extend between the diffuser inlet and the diffuser exit, and form a diffusing flowpath therebetween. The second flared downstream portion may include a lower section and an upper section, with the upper section extending further downstream in an axial direction than the lower section, relative to the diffuser axis.

Experimental and numerical study of a diffuser augmented wind turbine - DAWT

Abstract: The effect of concentrator-diffuser (C-D) of a shrouded wind turbine was studied. The main objective involved assessing the increment that this device induces in productivity of small wind turbines. Also the aerodynamic performance of two scaled blade models were studied in terms of drag and lift forces as a function of angle of attack for Re of 15714 and 37143. Wind turbine power performance was evaluated in terms of power coefficient values. Laboratory measurements showed that improvements were obtained on the electrical power values, resulting in an average increase of 90% in the corresponding power coefficient values. A more pronounced enhancement is described at lower wind speed values. CFD calculations were performed at flow values of 6 and 14 m/s to the C-D device. CFD calculations performed an evaluation of velocity experienced in the action rotor zone, which provided maximum increases of 81 % and 86 %, respectively. Numerical simulations and experimental measurements were performed also to the blades, where the results obtained were similar, providing a difference of 25 % for drag forces.

Vane type diffuser with horseshoe-shaped diffuser channels

Abstract: The invention discloses a vane type diffuser with horseshoe-shaped diffuser channels and belongs to the technical field of medium and small type aero-engine compressors. The vane type diffuser is characterized by being formed by a series of vanes which comprise the horseshoe-shaped diffuser channels and are uniformly distributed along the circumferential direction; the two adjacent diffuser channels are communicated with each other; dovetail-shaped inlet front edges are formed on the side of a wheel cover. The vane type diffuser with the horseshoe-shaped diffuser channels can be applied to a medium and small type aero-engine high-pressure ratio centrifugal compressor directly and accordingly the efficiency and the stability work margin of the centrifugal compressor can be greatly improved under the condition that the machining and manufacturing cost of the compressor diffuser is not increased.

Multi-stage compressor and air conditioner

Abstract: The utility model provides a multi-stage compressor and an air conditioner. The multi-stage compressor comprises a first-stage compression cavity and a second-stage compression cavity, wherein a first-stage impeller is located in the first-stage compression cavity, a second-stage impeller is located in the second-stage compression cavity, and the first-stage compression cavity is connected with the second-stage compression cavity through an air passing channel. The multi-stage compressor further comprises a shell, a box, a stage diffuser, an air replenishing channel and an air replenishing cavity, wherein at least a part of the first-stage compression cavity is formed in the shell, at least a part of the second-stage compression cavity is formed in the box, the stage diffuser is connected with the shell, the air replenishing channel is used for leading replenishing airflow into the air passing channel and is formed between the stage diffuser and the box, the air replenishing cavity is communicated with the air replenishing channel and is connected with an air source for air replenishing through an air inlet, and the air replenishing cavity is defined by the shell, the box and the stage diffuser. According to the multi-stage compressor, the air replenishing cavity is defined by the box, the shell and the stage diffuser, the size of the air replenishing cavity is not limited by the wall thickness of the box or the wall thickness of the shell, in this way, the beneficial effects of the air replenishing cavity on the replenishing airflow can be brought into full play, and the working efficiency of the multi-stage compressor is improved.

Engine assemblies and methods with diffuser vane count and fuel injection assembly count relationships

Abstract: An engine assembly includes a compressor section configured to supply compressed air and a combustion section coupled to the compressor section. The compressor section includes a diffuser with diffuser vanes to condition the compressed air, and the diffuser vanes have a vane count of a first value. The combustion section includes a combustion chamber to receive the compressed air and fuel injection assemblies configured to introduce fuel into the combustion chamber. The fuel injection assemblies have a fuel injection assembly count of a second value, and the first value is a whole number multiple of the second value.

Investigating the Thermal and Lighting Performance of Light Pipes for Sunny and Cloudy Conditions in Insular Tropical Climate

Abstract: Tubular light pipes (i.e., solar tubes) are modern daylighting devices, which are designed to let confined interior spaces benefit from natural lighting. In tropical country, the use of sunlight for lighting is a major concern due to the heat associated with sunlight, which has the potential to increase the cost of cooling, thereby reducing the energy savings from the reduction in lighting load. To investigate the thermal and lighting performance of light pipes, a case study for a seminar room, in which light pipes are installed, is presented. Temperatures for the solar tube (dome and diffuser), window and room were monitored continuously for 24 h periods. Results from the study indicate that the diffuser was on average 6.68 °C higher than room temperature on a clear day between 7:00 a.m. and 4:00 p.m., while dome temperature was on average 4.45 °C higher than diffuser's temperature during the same period. This large thermal gradient in the day between dome, diffuser and room can significantly increase the cost of maintaining thermal comfort of 25 °C, in the room. Another finding was the phenomenon of light pipes acting as a heat pumping the night, because it extracts heat from the room during the night between 7:00 p.m. and 4:00 a.m. This occurred because dome temperature is always smaller than diffuser and room temperature in the night. Therefore, for energy savings to be realized from light pipes, thermal performance must be taken into consideration in the analysis of energy savings from light pipes.