CN102011674A

CN102011674A - Distributed kinetic energy power generation device with convergent divergent runner

Info

Publication number: CN102011674A
Application number: CN2010105819660A
Authority: CN
Inventors: 黄典贵; 孙晓晶
Original assignee: University of Shanghai for Science and Technology
Current assignee: University of Shanghai for Science and Technology
Priority date: 2010-12-10
Filing date: 2010-12-10
Publication date: 2011-04-13
Anticipated expiration: 2030-12-10
Also published as: CN102011674B

Abstract

The invention relates to a distributed fluid (water or wind) kinetic energy power generation device with a convergent divergent runner. The power generation device comprises fluid kinetic energy generator sets, wherein each generator set consists of turbines and generators driven by the turbines; a plurality of generator sets are arranged and distributed in the power generation device; and each turbine unit is arranged on the throat of the convergent divergent runner composed of a front shield, a back shield, a shielding-concentrating plate, a concentrating-diffusing plate and a diffuser plate. When the fluid of the convergent divergent runner passes through the downwind section of one turbine, under the action of the convergent divergent runner, the fluid in the runner is firstly speeded up to have the highest speed at the throat; secondly the pressure is reduced; and after the fluid flows through the throat, the runner is expanded and the pressure is slowly increased. Therefore, the fluid velocity of each turbine can be greatly increased. In addition, the front shield and the shielding-concentrating plate both have the function of reducing the energy loss of the impeller on the upwind section of each turbine, thus the designed device can realize the energy conversion process more efficiently that the fluid kinetic energy is converted to mechanical energy and the mechanical energy is further converted to electric energy.

Description

Formula fluid dynamic energy electricity generating device arranged evenly with shrinkage expansion runner

Technical field

The present invention relates to the device that a kind of kinetic energy that utilizes fluid (water or wind) generates electricity, particularly a kind of formula fluid dynamic energy electricity generating device arranged evenly with shrinkage expansion flow passage structure.

Technical background

Similar with wind, thereby can producing huge energy equally, the ocean current of the horizontal motion that causes owing to brushing of difference that has temperature, salinity or wind in rivers water that turbulent flow is not stopped and the ocean also can be utilized to generating.Energy in the current is directly proportional with the quadratic sum flow of its flow velocity, in general, the water channel of Peak Flow Rate more than 2 meter per seconds, its current can all have the value that can develop.And that such zone distributes on earth is comparatively extensive, so current can be a kind of profuse renewable energy sources resources.According to theoretical calculation, global energy by ocean current can be up to 5TW.In recent years, the utilization of energy by ocean current had obtained the development of advancing by leaps and bounds, and many developed countries all drop into a huge sum of money and are used for the exploitation of energy by ocean current and the development of ocean current energy generator.Especially in Britain, full-scale ocean current energy generator has passed through marine test and has realized generating electricity by way of merging two or more grid systems, and the epoch that indicate industrialization, scale exploitation energy by ocean current at hand.

The flow velocity of ocean current is many at per hour 0.5 nautical mile in China marine site, and changes in flow rate is little, flows to comparatively stable.If with 100 cubic metres of calculating of mean flowrate per second, only the energy of China coastal waters and littoral current just can reach more than 100,000,000 kilowatts.Wherein the coastal energy by ocean current in Liaoning, Shandong, Zhejiang, Fujian and Taiwan is than horn of plenty, and the energy density of many water channels is about 15 ~ 30kW/m ², wait a door water channel as Jin Tang, Guishan Mountain and the west of the Zhoushan Islands in Zhejiang, average power density is all at 20kW/m ²More than, and these zones all are coastal comparatively developed regions, utilizing current can (wind-force) generating to can be to satisfy the fast-developing needed electric power of these regional economy and society provides powerful guarantee.

Existing vertical shaft utilizes the turbo machine of fluid dynamic energy generating, as Fig. 1 is S type turbo machine, Fig. 2 is many S type turbo machine, Fig. 3 is a glass aerofoil profile turbo machine, for these several turbo machines, when the flow direction of fluid (water or wind) for from left to right the time, impeller upper semisection and lower semisection all are subjected to fluid force to the right, but the power of upper semisection (AUG) obviously can be bigger than lower semisection, turbo machine will turn clockwise, doing work when impeller turns over upper semisection, is downwind leg, the acting process, impeller turns over lower semisection (GDA) and also is section against the wind, by consuming certain energy, the recovery of kinetic energy that makes fluid is the wasted work process to the acting section, that is to say, the energy of the pairing fluid of impeller lower semisection does not only obtain utilizing, and has played catabiotic effect on the contrary.

Fig. 4 is a kind of screen type plate aerofoil profile turbo machine.This device, make impeller lower semisection (against the wind section) thus pairing fluid will no longer directly impact the rotation that no longer hinders impeller on blade, but the energy in this part fluid also falls total loss.Fig. 5 is that a kind of energy-focusing speed-increasing covers arranged distribution formula device.In this device, turbo machine is in shield, cover-downstream part of the fluid passage that cumulative plate and cumulative plate constitute, shield and covering-cumulative plate has played the effect that stops incoming flow to the blade of turbine wheel lower semisection, thereby has reduced the loss of energy on the turbo machine.Though the contracted channel that turbo machine the place ahead cumulative plate and covering in this device-cumulative plate constitutes can play certain acceleration to incoming flow, but turbo machine is in the outlet of runner, that is to say, the pressure of turbo machine outlet is exactly external pressure, the pressure at turbo machine place can not effectively reduce, speed also just is difficult to improve naturally, and therefore, the capacity usage ratio of this device does not reach very high level.

Summary of the invention

The object of the invention is to propose a kind of formula fluid arranged evenly (water or wind) kinetic-energy power generator with shrinkage expansion runner at the problem of said apparatus, this device not only can farthest be collected current (wind) can, and utilize diffuser, effectively reduce the pressure of shrinkage expansion runner throat, improve the flowing velocity of throat's place's fluid, thereby can further improve the energy conversion efficiency of the above-mentioned type turbo machine.

In order to achieve the above object, the present invention adopts following technical proposals:

A kind of formula fluid dynamic energy electricity generating device arranged evenly with shrinkage expansion runner, comprise the fluid kinetic energy generator group of forming by the generator of turbo machine and driving thereof, it is characterized in that having a plurality of generator set unit cell arrangement to distribute, the throat of the shrinkage expansion runner that the downwind leg of each turbine unit is positioned at by the shield at its front portion and rear, covers-the cumulative plate, cumulative-diffusion plate and diffusion plate constitute jointly.

Above-mentioned shield and cumulative-diffusion plate, the shape of energy-gathering-shadowing plate and diffusion plate can be identical, and the shield of a turbine unit just in time is exactly the cumulative-diffusion plate of adjacent turbines unit.

The smoothed curve that the molded lines of above-mentioned functions plate is formed by one or more snippets camber line constitutes, the rotating center of the curvature circle-center of its camber line and the turbo machine that is covered is in the same side, radius of curvature is 1.005-100 a times of turbine rotor radius, and its arc length is 1.2-200 a times of turbine rotor radius.

The diffuser at above-mentioned turbo machine rear portion effectively reduces the pressure of shrinkage expansion runner throat, improves the liquid speed of throat, thereby can further improve the energy conversion efficiency of the above-mentioned type turbo machine.

The shield in above-mentioned turbo machine the place ahead and covering-cumulative plate can be effectively to turbine wheel against the wind a section blade cover, incoming flow can not directly be impacted on this section blade.

Above-mentioned turbo machine is S type, many S type, plate aerofoil profile or cup aerofoil profile.

Because the direction of fluid is constant, above-mentioned each shield, cover-the cumulative plate, cumulative-diffusion plate and diffusion plate can be fixed on the supporting mechanism, no longer needs to install complicated control structure and implement convection current, thereby this device is simple in structure.

The present invention has following conspicuous substantive outstanding feature and significant advantage compared with prior art: the throat of the shrinkage expansion runner that the downwind leg of turbo machine is in by shield, covers-the cumulative plate, cumulative-diffusion plate and diffusion plate constitute jointly.Because there is a diffuser in the runner rear portion, the pressure of fluid is lower than the external pressure of periphery always in this runner, and throat pressure is minimum, only just returns to external pressure in outlet pressure, and therefore, the speedup effect of throat's fluid is remarkable.

Description of drawings

Fig. 1 is the S type turbine structure schematic representation of prior art;

Fig. 2 is many S type turbine structure schematic representation of prior art;

Fig. 3 is the cup aerofoil profile turbine structure schematic representation of prior art;

Fig. 4 is the screen type plate aerofoil profile turbine structure schematic representation of prior art;

Fig. 5 is that the energy-focusing speed-increasing of prior art covers the arranged distribution formula and utilizes fluid dynamic energy electricity generating device schematic representation;

Fig. 6 is the structural representation that the present invention has the formula fluid dynamic energy electricity generating device arranged evenly of shrinkage expansion runner;

Fig. 7 is the plan view that is used for fluid dynamic energy electricity generating device shown in Figure 6.

Embodiment

The preferred embodiments of the present invention accompanying drawings is as follows:

Embodiment one: referring to Fig. 6 and Fig. 7, originally have the formula fluid dynamic energy electricity generating device arranged evenly of shrinkage expansion runner, comprise the fluid kinetic energy generator group of being made up of the generator of turbo machine and driving thereof;

Embodiment two: present embodiment and embodiment one are basic identical, specialization is as follows: described below shield 2 is identical with the shape of top cumulative-diffusion plate 4, the front portion covers-and cumulative plate 1 is identical and symmetrical with the shape of rear portion diffusion plate 5, and the below shield 2 of a turbine unit just in time is exactly the cumulative-diffusion plate 4 of top, adjacent turbines unit;

Embodiment three: present embodiment and embodiment one are basic identical, specialization is as follows: present embodiment is many S type (2 the S types) vertical axis turbine 3 and generator 6 that 2 diameters of this fluid dynamic energy electricity generating device employing are 5m, as Fig. 7, energy-gathering-shadowing plate 1, shield 2, cumulative-diffusion plate 4 and diffusion plate 5 constitute by one section circular arc, the diameter of circular arc all is 22.5m, and the center of circle and the institute screening turbo machine center of circle are in the same side.Plate 1 and 5 length of (on the CD direction) in the horizontal direction is 4m.Constituting the covering of shrinkage expansion runner-cumulative plate 1, shield 2, cumulative-diffusion plate 4 and diffusion plate 5 directly is fixed on the supporting mechanism 7.

Claims

1. formula fluid dynamic energy electricity generating device arranged evenly with shrinkage expansion runner, comprise the fluid kinetic energy generator group of forming by the generator (6) of turbo machine (3) and driving thereof, it is characterized in that having a plurality of fluid kinetic energy generator group cell distribution to arrange, each turbine unit is installed on by covering-cumulative plate (1), shield (2), in the common shrinkage expansion runner that constitutes of cumulative-diffusion plate (4) and diffusion plate (5), make the downwind leg of turbo machine (3) be installed in the throat of this shrinkage expansion runner, and the contrary wind section of turbo machine (3) be installed in cover-cumulative plate (1) and shield (2) constitute the downstream of structure, guarantee that incoming flow can not directly impact on the contrary wind section of turbo machine (3).

2. the formula fluid dynamic energy electricity generating device arranged evenly with shrinkage expansion runner according to claim 1, it is characterized in that the below shield (2) and the shape of top cumulative-diffusion plate (4) can be just the same, the turbo machine front portion covers-shape of the diffusion plate (5) at cumulative plate (1) and turbo machine rear portion symmetry fully then, and the shield (2) of a resistance type turbine unit (3) also just in time is exactly the cumulative-diffusion plate (4) of top, adjacent turbines unit (3); And the smoothed curve that the molded lines of above-mentioned plate (1), (2), (4) and (5) is formed by one or more snippets camber line constitutes, radius of curvature is 1.005-100 a times of turbo machine (3) rotor radius, and its arc length is 1.2-200 a times of turbo machine (3) rotor radius; Described shield (2) with cover-cumulative plate (1) forms the masking structure to turbo machine (3) lower semisection blade, incoming flow can not directly be impacted on the lower semisection blade of impeller; Each covers-and cumulative plate (1) and fixedly connected shield (2) and cumulative-diffusion plate (4) thereof, diffusion plate (5) all can be according to coming flow path direction to be fixed on the supporting mechanism (7).