CN205895505U - Power generation facility of joint solar chimney, ventilation blower and wind energy conversion system - Google Patents

Abstract

The utility model discloses a power generation device combined with a solar chimney, a ventilator and a wind turbine, which comprises a heat collection shed, a chimney, a turbine, a ventilator and a wind turbine. The cover plate and the heat storage layer located in the lower layer are supported by brackets. The cover plate and the heat storage layer form a trumpet-shaped diversion chamber. The outer ring of the diversion chamber is its inlet, the inner ring is its outlet, and the chimney is vertical. Hollow cylinder, the outlet of the diversion cavity communicates with the lower port of the chimney, and a turbine is arranged at the center of the outlet, a ventilator is provided at the center of the upper port of the chimney, and the wind turbine, turbine, The central axis of rotation of the fan and the wind machine coincides with the central axis of the chimney, and the blades of the wind machine are connected with the blades of the fan to drive the blades of the fan to rotate. The utility model realizes the comprehensive utilization of solar energy and wind energy, and the ventilator improves the output power of the solar chimney power station, so that the total power generation of the device is greatly improved.

Description

A power generation device combining solar chimney, ventilator and wind turbine

technical field

The utility model belongs to the technical field of new energy power generation, and in particular relates to a power generation device combined with a solar chimney power generation, a ventilator and an H-shaped vertical axis wind power machine.

Background technique

With the rapid development of the global economy, the supply of fossil fuels is becoming increasingly tight, and because fossil fuels emit a large amount of harmful gases, which have a serious impact on the ecological environment and people's health, solar energy and wind energy are clean and renewable energy sources. to use is gaining more and more attention.

Because the conversion efficiency of solar energy is generally less than 1% in the existing single solar chimney power generation technology, and it is greatly affected by climate and weather, it is difficult for this single solar chimney power generation technology to be commercialized on a large scale. The combination of technology and other forms of power generation is an inevitable trend.

In the existing wind power projects, due to the randomness and uncontrollability of the wind, it cannot be effectively utilized when the wind is too strong or too small, resulting in the low annual power generation hours of the existing wind power generation equipment and the low utilization efficiency of wind energy. Therefore, how to obtain stable wind energy is the key to improving the efficiency of wind power generation equipment.

Utility model content

The purpose of the utility model is to overcome the deficiencies in the prior art and provide a power generating device that combines solar chimneys, ventilators and wind turbines, comprehensively utilizes solar energy and wind energy to generate electricity, and utilizes ventilators to generate negative pressure in the chimney, thereby Improving the output power of the solar chimney power station greatly improves the total power generation.

In order to solve the above technical problems, the utility model provides a power generation device combined with a solar chimney, a ventilator and a wind turbine, which is characterized in that it includes a heat collection shed, a chimney, a turbine, a ventilator and a wind turbine, and the heat collection shed It includes a cover plate, a bracket and a heat storage layer. The cover plate on the upper layer and the heat storage layer on the lower layer are supported by a bracket. The cover plate and the heat storage layer form a trumpet-shaped diversion chamber, and the outer ring of the diversion chamber is its Inlet, the inner ring is its outlet, the chimney is a vertical hollow cylinder, the outlet of the diversion cavity communicates with the lower port of the chimney, and the turbine is arranged at the center of the outlet, and the center of the upper port of the chimney is provided with Ventilator, described wind machine is arranged on the top of the ventilator, the rotation central axis of the turbine, the ventilator and the wind machine coincides with the central axis of the chimney, and the blades of the wind machine are connected with the blades of the ventilator to drive the blades of the ventilator to rotate.

Further, the diversion chamber includes a horizontal section and a transition section, the horizontal section and the transition section are connected to form a trumpet-shaped diversion chamber, the flow channel of the transition section gradually narrows from bottom to top, and the upper port of the transition section is connected to the chimney. The lower port is connected.

Further, the turbine is an axial flow pressure stage turbine generator.

Further, the fan is an axial flow fan, and the wind turbine is an H-type vertical axis wind generator.

Further, the bottom of the central main shaft of the wind turbine is connected to the chimney wall, the blades of the fan are evenly distributed along the circumference of the central shaft, and the blades of the wind turbine are rigidly connected to the blades of the fan.

Further, the number of blades of the wind turbine is equal to the number of blades of the fan.

Compared with the prior art, the beneficial effects achieved by the utility model are: the utility model utilizes the heat collection shed to absorb solar energy, continuously heats the airflow through convective heat exchange, increases the airflow velocity, utilizes the chimney effect to generate a pressure difference, and the turbine utilizes the pressure difference Poorly able to do work. Due to the high wind speed at high altitude, the vertical axis wind turbine at the top uses the natural wind from high altitude to generate electricity and drives the fan to rotate. The fan can increase the negative pressure in the chimney and increase the output power of the turbine. The utility model realizes the comprehensive utilization of solar energy and wind energy, can greatly increase the total power generation, and has broad application prospects.

Description of drawings

Fig. 1 is a structural schematic diagram of the utility model power generation device.

Fig. 2 is a top view of the wind turbine in the power generation device of the present invention.

Fig. 3 is a top view of the turbine in the power generating device of the present invention.

Reference signs: 1, heat collection shed; 11, cover plate; 12, bracket; 13, heat storage layer; 2, turbine; 21, turbine impeller; 22, turbine hub; 3, chimney; 4, wind turbine; 41, 42. Wind turbine blades; 43. Connecting rod; 44. Wind turbine generating set; 45. Guide vanes; 5. Ventilator; 51. Ventilator hub; 52. Ventilator blades.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described. The following examples are only used to illustrate the technical solution of the utility model more clearly, but not to limit the protection scope of the utility model.

As shown in Fig. 1, a kind of power generation device of the utility model combined solar chimney, ventilator and wind turbine is characterized in that, comprises heat collection shed 1, chimney 3, turbine 2, ventilator 5 and wind turbine 4, so The heat collection shed 1 includes a cover plate 11, a bracket 12, and a heat storage layer 13. The cover plate 11 on the upper layer and the heat storage layer 13 on the lower layer are supported by the bracket 12. The cover plate 11 and the heat storage layer 13 form a trumpet shape. The diversion chamber, the outer ring of the diversion chamber is its inlet, and the inner ring is its outlet. The chimney 3 is a vertical hollow cylinder. The outlet of the diversion chamber communicates with the lower port of the chimney 3, and in the center The turbine 2 is provided at the center of the upper port of the chimney 3, and the fan 5 is provided at the center of the upper port of the chimney. 3 central axes coincide, and the blades of the wind turbine 4 are connected with the blades of the ventilator 5 to drive the blades of the ventilator 5 to rotate.

The heat storage layer 13 is made of a heat storage material, and the cover plate 11 is made of a light-transmitting material, such as glass or a film with good light transmission. The upper cover plate 11 and the lower heat storage layer 13 pass through a bracket 12 supports, the heat collection shed 1 is inclined upward from the peripheral inlet to the inner outlet to form a trumpet shape, that is, the cover plate 11 and the heat storage layer 13 form a trumpet-shaped diversion cavity, and the diversion cavity includes a horizontal section and a transition section, and the horizontal section and the transition section The sections are connected to form a trumpet-shaped diversion cavity, and the flow channel of the transition section gradually narrows from bottom to top. The two sides of the transition section are designed using the method of fluid mechanics to find the streamline. The upper port of the transition section communicates with the lower port of the chimney 3 , and the hot air flows into the chimney 3 from the inlet of the horizontal section and flows out through the outlet of the transition section.

The turbine 2 is an axial-flow pressure stage turbine generator, and the turbine 2 is arranged at the outlet center of the transition section, as shown in Figure 1 and Figure 3, the turbine 2 is provided with 6 turbine wheels 21, between the turbine wheels 21 and the chimney wall There is a gap, and when installed, the turbine hub 22 coincides with the central axis of the chimney 3, so that the rotation central axis of the turbine 2 coincides with the central axis of the chimney 3.

The wind turbine 4 is an H-type vertical axis wind-driven generator. As shown in Figures 1 and 2, the wind turbine 4 includes a central main shaft 41, wind turbine blades 42, connecting rods 43 and wind turbine generating sets 44, and the center line of the central main shaft 41 is Coincident with the center line of the chimney 3, the central main shaft 41 extends to the inside of the chimney 3 and is fixed to the chimney wall through the guide vane 45, which has a flow guiding effect. The wind turbine 4 includes five wind turbine blades 42, which are evenly distributed along the circumference of the central main shaft 41 , the radius of rotation of the wind turbine blades 42 is the same as that of the chimney 3 , the connecting rod 43 is rigidly connected with the wind turbine blades 42 , and the wind turbine generating set 44 is installed at the lower end of the central main shaft 41 .

Ventilator 5 is an axial-flow ventilator, and ventilator 5 comprises ventilator blade 51 and ventilator hub 52, and ventilator hub 52 is arranged on the lower end of central main shaft 41, and wind turbine generating set 44 is placed in the ventilator hub 52, ventilation Machine hub 52 and central main shaft 41 are integrally arranged; Ventilator blade 51 quantity is 5, and ventilator blade 51 is rigidly connected with wind turbine blade 42 one by one, simultaneously as the connecting rod of wind turbine blade 42 lower ends, so that ventilator blade 51 rotates together with the wind turbine blade 42 .

The working principle of the power generating device of the utility model is that outside air flows into the heat collecting shed 1 through the heat collecting shed inlet. During the daytime, the heat storage layer 13 at the bottom of the heat collection shed 1 absorbs solar radiation, and the temperature rises sharply. Due to the larger radius of the heat collecting shed 1, the airflow has a longer heating time. As the temperature of the airflow increases, the density of the airflow decreases, and the flow velocity of the airflow will also increase accordingly, so that the outside air can be replenished continuously through the inlet of the heat collecting shed. In the evening, because the thermal storage layer 13 has a strong thermal insulation capacity, the continuous operation of the device can still be guaranteed. Due to the existence of the tall hollow cylindrical chimney 3, the tall chimney 3 will produce a chimney effect, and a large relative pressure difference will be formed at the bottom of the chimney 3, so the hot air flow will produce an obvious pressure drop after entering the transition section. Coupled with the sharp narrowing of the airflow channels on both sides in the transition section, the velocity of the airflow is significantly increased, and the velocity and pressure drop of the hot airflow at the outlet of the transition section (ie, the chimney inlet) reach a larger value , so the axial flow pressure stage turbine 2 is set here. The updraft pushes the blades of the turbine 2 to rotate, and drives the corresponding generator of the turbine 2 to generate electricity.

The hot air flow passing through the turbine 2 continues to rise along the chimney 5, the temperature of the air flow gradually decreases during the ascent process, the enthalpy drop is transformed into gravitational potential energy, and the speed of the air flow decreases slightly. The airflow then flows into the axial fan 5 which accelerates the exhaust airflow outwards.

Due to the high wind speed in the high altitude, the high altitude natural wind pushes the wind turbine blades 42 of the H-shaped vertical axis wind turbine 4 above the chimney 3 to rotate, and drives the corresponding wind power generation unit 44 to generate electricity.

Since the wind turbine blades 42 of the H-type vertical axis wind turbine 4 are rigidly connected to the fan blades 51 of the fan 5, the fan blades 51 are driven to rotate together when the wind turbine blades 42 rotate, so that the fan 5 works normally. When the ventilator 5 is working normally, the exhaust airflow can be accelerated outward, so that the air pressure inside the chimney 3 is reduced, and a greater negative pressure is formed inside the chimney 3, so that the output power of the turbine generator 2 is greatly improved.

The prototype size of the Spanish solar power station is adopted below to compare the total output power of the single solar chimney power station and the utility model combined solar chimney, ventilator and wind power generator.

Take the data of the Spanish prototype power station: chimney height H _ch =194.6m, chimney radius R _ch =5.08m, heat collection shed radius R _coll =122m, heat collection shed entrance height h _coll =1.85m.

At the same time, the same meteorological conditions are taken in the comparison, the average solar radiation intensity I=1000W/m ² , and the outside air temperature T _a =288.15K. In the following formula, η _c is the efficiency of the heat collection shed; C _p is the specific heat capacity of air, C _p = 1000J/(kg·℃); ρ is the air density, assumed to be a fixed value ρ = 1.225kg/m ³ ; g is the acceleration of gravity , g=9.81m/s ² ; η is the gas flow conversion efficiency, and η=0.4.

The relevant data of a single solar chimney power station are as follows:

Temperature rise from the inlet to the outlet of the heat collection shed where m is the mass flow rate,

Mass flow m = ρπR _ch ² v, where v is the air velocity,

air velocity

Substituting the above data into the above three equations, the above equations can be solved simultaneously:

Temperature rise ΔT=11.965K, mass flow m=1249.89kg/s, air velocity v=12.5915m/s,

relative pressure difference at the turbine

Airflow power P=ΔP×m/ρ _a =95.176kW,

Output power N=η×P=38.071kW.

The relevant data of the power generating device of the utility model combined solar chimney, ventilator and wind turbine are as follows:

The H-type vertical axis wind turbine has the following design parameters: impeller diameter d=10m, blade length l=15m, rated wind speed v=15m/s, rated speed n=200rpm, and wind energy utilization coefficient C _p =0.15.

wind power

H-type vertical axis wind turbine output power N'=C _p P _w ＝37.21kW,

The rotational speed of the axial fan is the same as that of the H-type vertical axial fan, n'=n=200rpm, and the diameter of the wind wheel d'=d=10m. On the premise that the mass flow m=1249.89kg/s is a certain value, that is, under the conditions of air volume V=m×3600/ρ _a =3.67×10 ⁶ m ³ /h, n′=200rpm, d′=10m, select The negative pressure obtained by a certain type of vertical-axis axial-flow fan is between 30Pa-40Pa, and here, the negative pressure ΔP'=35Pa is taken.

Then the output power N″=ηm×(ΔP+ΔP′)/ρ _a =52.334kW, compared with the output power of a single solar chimney power station, it has increased by 14.263kW, and the increase rate is 37.5%. The total output power of the power generation device N _all =N'+N"=89.54kW.

It can be seen from the above data that the power generation device of the utility model has greatly improved the output power of the solar chimney power station, and through the comprehensive utilization of solar energy and wind energy, the total power generation of the device has been greatly improved.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the utility model, some improvements and modifications can also be made. And modification should also be regarded as the protection scope of the present utility model.

Claims (6)

1. a kind of power generation device of joint solar chimney, ventilator and wind machine, it is characterized in that, comprise heat-collecting shed, chimney, turbine, ventilator and wind-driven machine, described heat-collecting shed comprises cover plate, support and thermal storage layer , the cover plate on the upper layer and the heat storage layer on the lower layer are supported by brackets, the cover plate and the heat storage layer form a trumpet-shaped diversion chamber, the outer ring of the diversion chamber is its inlet, and the inner ring is its outlet. The chimney is a vertical hollow cylinder, the outlet of the diversion cavity communicates with the lower port of the chimney, and the turbine is provided at the center of the outlet, the center of the upper port of the chimney is provided with a ventilator, and the top of the ventilator is provided with Described wind machine, the rotation center axis of turbine, fan and wind machine coincides with the chimney center axis, the blade of fan is connected with the blade of wind machine, and the blade of wind machine is connected with the blade of fan to drive the blade of fan to rotate . 2. A kind of power generation device combining solar chimney, ventilator and wind turbine according to claim 1, it is characterized in that, described diversion cavity comprises horizontal section and transition section, and horizontal section and transition section are communicated into trumpet-shaped In the diversion cavity, the flow channel of the transition section gradually narrows from bottom to top, and the upper port of the transition section communicates with the lower port of the chimney. 3. The power generating device of a kind of combined solar chimney, ventilator and wind power machine according to claim 1, is characterized in that, described turbine is an axial-flow pressure stage turbine generator. 4. a kind of power generation device of combined solar chimney, ventilator and wind turbine according to claim 1, is characterized in that, described ventilator is an axial flow ventilator, and described windmill is H type vertical axis wind power generation machine. 5. a kind of power generation device of combined solar chimney, fan and wind machine according to claim 4, it is characterized in that, the central main shaft bottom of described wind machine is connected with chimney wall, and the blade of fan is along the circumference of central shaft Evenly distributed, the blades of the wind turbine are rigidly connected to the blades of the fan. 6. The power generating device of a kind of combined solar chimney, ventilator and wind-driven machine according to claim 5, is characterized in that, the number of blades of wind-driven machine is equal to the number of blades of ventilator.