Floating type solar water collector for enhancing heat exchange through wind power disturbance nanofluid

Abstract

The utility model discloses a wind power disturbance nanofluid enhanced heat exchange floating type solar water collector which comprises fan blades, a shaft rod, a water vapor collecting plate, a heat preservation wall, a matching weight, a rotation resisting plate, a buoyancy plate, a water collecting tank, a light reflecting wall, a light transmitting plate, a filter screen, a propeller, a heat conduction wall and a sponge block. The shaft rod penetrates through the middle of the light-transmitting plate, the lower portion of the light-transmitting plate is connected with the heat conduction wall and provided with a nanofluid inlet and outlet, the light reflecting wall is arranged above the light-transmitting plate and connected with the upper portion of the water collecting tank in a sealed mode through the water vapor collecting plate, the water collecting tank is arranged above the buoyancy plate, and a water drainage opening is formed in the side of the water collecting tank. The buoyancy plate is arranged above the heat preservation wall formed by the outer side heat preservation wall and the bottom heat preservation wall, rotation stopping plates are evenly distributed in the circumferential direction of the outer side heat preservation wall, and the matching weight is hung at the bottom end of the heat conduction wall. The device has the advantages that the temperature gradient of the photo-thermal conversion medium is reduced, the heat transfer efficiency is improved, and the occupied area is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of new energy utilization and water resource collection, and particularly relates to a floating solar water collector with wind disturbance nanofluid enhanced heat transfer. BACKGROUND

[0002] With the rapid development of global economy and the sharp rise in energy demand, freshwater resource shortage has become a major bottleneck restricting the sustainable development of economy and society. Solar energy, as a clean, pollution-free and widely distributed renewable energy, has great potential for development and utilization, providing an innovative approach to solving the problem of freshwater resources. Among them, solar water collectors that use solar energy to evaporate water into water vapor and collect it are becoming one of the effective ways to alleviate water resource shortage.

[0003] Nanofluid technology, by uniformly dispersing nanoparticles in a liquid to form a suspension, significantly improves the heat conduction performance and light absorption capacity of the liquid. Applying this technology to solar water collectors can greatly improve the light-heat conversion efficiency and evaporation efficiency of solar energy, thereby more effectively collecting water resources.

[0004] However, current solar water collectors that apply nanofluids for heat collection still face some challenges. Under light conditions, a large temperature gradient is easily generated inside the heat collector, limiting the heat transfer efficiency. In addition, the water collector device often occupies a large area of land, affecting the effective use of land resources. SUMMARY

[0005] The present application provides a floating solar water collector with wind disturbance nanofluid enhanced heat transfer to solve the problems of uneven temperature inside the heat collector, low heat transfer efficiency, and land occupation in the prior art.

[0006] The technical solution adopted in this invention is as follows: a floating solar water collector with wind-powered enhanced heat exchange, comprising fan blades, a shaft, a water vapor collection plate, an insulation wall, a mounting bracket, a swirl-blocking plate, a buoyancy plate, a water collection tank, a reflective wall, a light-transmitting plate, a filter, a propeller, a heat-conducting wall, and sponge blocks. The fan blades are made of transparent acrylic material and are connected to the propeller via a shaft to collect wind power, thereby driving the propeller to rotate, reducing the temperature gradient of the nanofluid, and increasing heat exchange efficiency. The heat collection chamber is sealed by a light-transmitting plate and a heat-conducting wall. The heat-conducting wall is made of copper metal to increase heat transfer efficiency, and the light-transmitting plate is made of transparent material to increase light penetration and reduce heat loss caused by air convection. It has a nanofluid inlet and outlet for the injection and discharge of the nanofluid. The evaporation chamber is surrounded by an insulation wall and a heat-conducting wall. The insulation wall has multiple circumferentially arrayed inclined through holes, each filled with a sponge block. This allows for the replenishment of evaporated water into the water collector through the sponge-filled through holes while isolating solid impurities. The heat-conducting wall is made of metal, which increases the heat transfer area and thus improves the evaporation rate of the water inside the evaporation chamber. The water collection tank is located above the buoyancy plate and is sealed to the upper end of the reflective wall by a water vapor collection plate. It is a ring-shaped groove that primarily collects water droplets condensed on the water vapor collection plate. A drain outlet is located on the outer side. The water vapor collection plate is annular with evenly distributed elongated protrusions on its inner circumference, increasing the contact area with water vapor and improving condensation efficiency. The buoyancy plate is made of a high-buoyancy material and is a flat, ring-shaped structure. Its inner side is connected to the insulation wall, and its upper part supports the water collection tank, controlling the height of the solar water collector on the water surface to achieve a constant floating effect. The anti-rotation plate is a sheet-like structure placed below the buoyancy plate and evenly encircling the insulation wall. It increases the rotational resistance of the water collector, reducing the rotation amplitude of the solar water collector caused by the fan blades and propellers, thereby reducing energy loss.

[0007] Preferably, the light-transmitting plate is composed of a transparent double-layer vacuum quartz glass disc, which can increase light transmittance and reduce heat loss.

[0008] Preferably, the light-transmitting plate and the heat-conducting wall are sealed to form a heat collection chamber, which is filled with nanofluid and equipped with a propeller, which can increase the light absorption capacity and reduce the temperature difference of the nanofluid at different heights.

[0009] Preferably, the heat-conducting wall is composed of a copper metal wall surface and L-shaped heat transfer fins, wherein the heat transfer fins are evenly distributed circumferentially on the copper metal wall surface, which can increase the heat transfer area and thus improve the evaporation rate of the water inside the evaporation chamber.

[0010] Preferably, the number of heat transfer fins is 20-50.

[0011] Preferably, the thickness of the heat transfer fins is 2-5 mm.

[0012] Preferably, the heat transfer fins are 5-20mm away from the side inner wall of the heat preservation wall.

[0013] Preferably, the side of the heat preservation wall has a plurality of circumferentially arranged inclined through holes, and the inclined angle of the through holes with the vertical direction is 45-60°, which is beneficial to the placement of the sponge and the transportation of water.

[0014] Preferably, the bottom of the heat preservation wall is matched with a filter screen to isolate solid impurities and prevent the sponge from falling off.

[0015] Preferably, the buoyancy plate is made of a high buoyancy material with a density less than water, such as foamed plastic or hollow aluminum plate, and has a flat circular ring shape, and the buoyancy of the buoyancy plate can control the height of the solar water collector on the horizontal plane to achieve the effect of constant floating on the water surface.

[0016] Preferably, the light reflection wall is composed of annular light reflection lenses, which can collect the light on the upper surface of the transparent plate to further improve the light absorption effect of the nanofluid.

[0017] Preferably, the water vapor collecting plate is an annular plate with long strip-shaped protrusions uniformly distributed on the inner wall to increase the water vapor contact area and improve the water vapor collecting efficiency, and the inclination angle of the water vapor collecting plate with the horizontal direction is 15-30° to further improve the condensation effect.

[0018] Preferably, the counterweight is hung below the heat conduction wall by a rope to counterweight and stabilize the solar collector, and the hole in the middle of the bottom of the heat preservation wall is also provided with a filter screen through which the rope passes.

[0019] By adopting the above technical scheme, the nanofluid is agitated by the wind-driven propeller to reduce the temperature gradient, increase the heat exchange efficiency, and reduce the land use area by floating on the water surface. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 Fig. 1 is a schematic diagram of the external structure of the floating solar water collector of the application;

[0021] Fig. 2 Fig. 2 is a schematic diagram of the front cross-sectional structure of the floating solar water collector of the application;

[0022] Fig. 3 Fig. 3 is a schematic diagram of the bottom cross-sectional structure of the floating solar water collector of the application. DETAILED DESCRIPTION

[0023] The application will be further described in detail below with reference to the accompanying drawings.

[0024] The application discloses a floating solar water collector with wind disturbance nanofluid enhanced heat exchange, which refers to Figs. 1-3 , comprising a fan blade 1, a shaft 2, a water vapor collecting plate 4, a heat preservation wall 6, a code 7, a rotation resisting plate 8, a buoyancy plate 9, a water collecting tank 10, a light reflecting wall 11, a light transmitting plate 12, a filter screen 13, a propeller 14, a heat conducting wall 15 and a sponge block 16. The fan blade 1 is made of transparent acrylic material and is connected with the propeller 14 through the shaft 2, so that wind power is collected to drive the propeller 14 to rotate, reduce the temperature gradient of the nanofluid and increase the heat exchange efficiency. The heat collecting chamber is sealed by the light transmitting plate 12 and the heat conducting wall 15, the heat conducting wall 15 is made of copper metal to increase the heat transfer efficiency, the transparent plate 12 is composed of transparent double-layer vacuum quartz glass circular plates to increase the light penetration effect and reduce the heat loss caused by air convection, and a nanofluid inlet and outlet 3 is arranged on the transparent plate 12 for injection and discharge of the nanofluid. The evaporation chamber is surrounded by the heat preservation wall 6 and the heat conducting wall 15, the heat preservation wall 6 is provided with a plurality of circumferentially arranged inclined through holes, the inclined angle of the through holes is 45-60 degrees, sponge blocks are arranged in the through holes, water evaporation can be supplemented to the water collector through the through holes with the sponge, and solid impurities are isolated. A through hole is arranged at the bottom of the heat preservation wall 6 and cooperates with the filter screen 13 to supplement water and isolate solid impurities. The heat conducting wall 15 is composed of a metal wall surface and L-shaped heat transfer fins, the heat transfer fins are circumferentially distributed on the metal wall surface to increase the heat transfer area, so that the evaporation rate of the water in the evaporation chamber is improved. The water collecting tank 10 is located on the upper side of the buoyancy plate 9, the water collecting tank 10 is sealedly connected with the upper end of the light reflecting wall 11 through the water vapor collecting plate 4 and is in a ring-shaped groove shape, mainly collects water droplets condensed on the water vapor collecting plate 4, and is provided with a water outlet 5 on the outer side, the water vapor collecting plate 4 is in a ring-shaped plate shape and has an inclined angle of 15-30 degrees, the inner wall is circumferentially and uniformly provided with a long strip-shaped protrusion, so that the contact area with water vapor is increased, and the condensation effect is improved. The light reflecting wall 11 is composed of annular reflecting mirror pieces, collects light above the light transmitting plate 12 and further increases the light absorption effect of the nanofluid. The buoyancy plate 9 is made of high buoyancy material and is in a flat circular ring shape, the inner side is connected with the heat preservation wall 6, the upper part supports the water collecting tank 10, the height of the solar water collector on the horizontal plane is controlled, and the effect of constant floating on the water surface is achieved. The rotation resisting plate 8 is in a sheet structure, is arranged below the buoyancy plate 9 and circumferentially and uniformly surrounds the heat preservation wall 6, increases the rotation resistance of the water collector, reduces the rotation amplitude of the solar water collector when the fan blade 1 and the propeller 14 rotate, so that energy loss is reduced, and the heat conducting wall 15 is hung on a code 7 below and is connected with the filter screen 13 through a rope, so that the solar heat collector is counterweighted and stabilized.

[0025] Finally, it should be noted that the above only for the preferred embodiments of the present application patent, and is not intended to limit the patent, although the foregoing detailed description of the application of the patent, for the skilled person, it still can be modified, or the equivalent replacement of the technical features of the embodiments described in the foregoing. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application patent, should be included in the scope of the present application patent.

Claims

1. A floating solar water collector with wind disturbance nanofluid enhanced heat transfer, characterized in that: The solar energy collector comprises a fan blade, a shaft, a water vapor collecting plate, a heat preservation wall, a code, a rotation resisting plate, a buoyancy plate, a water collecting tank, a light reflecting wall, a light transmitting plate, a filter screen, a propeller, a heat conducting wall and a sponge block, the fan blade is made of transparent acrylic material, is connected with the propeller through a shaft, collects wind power, and drives the propeller to rotate; the heat collecting chamber is sealed by the light transmitting plate and the heat conducting wall, the heat conducting wall is a metal wall, and a nano fluid inlet and outlet are arranged on the heat conducting wall for injection and discharge of the nano fluid; the evaporation chamber is surrounded by the heat preservation wall and the heat conducting wall, the heat preservation wall is provided with a plurality of circumferentially arranged inclined through holes, the through holes are plugged with sponge blocks, the through holes with sponge supplement water evaporation to the water collector, and solid impurities are isolated; the water collecting tank is located on the upper side of the buoyancy plate, the water collecting tank is sealed and connected with the upper end of the light reflecting wall through the water vapor collecting plate, is in a ring-shaped groove shape, collects water droplets condensed on the water vapor collecting plate, and is provided with a water outlet on the outer side, the water vapor collecting plate is in a ring-shaped plate shape, and the inner wall is circumferentially distributed with a long strip-shaped protrusion; the buoyancy plate is made of high buoyancy material, is in a flat circular ring shape, is connected with the heat preservation wall on the inner side, and supports the water collecting tank on the upper part, controls the height of the solar energy collector on the horizontal plane, and achieves the effect of constant floating on the water surface; the rotation resisting plate is in a sheet structure, is arranged below the buoyancy plate, and is circumferentially and uniformly arranged on the heat preservation wall, increases the rotation resistance of the water collector, and reduces the rotation amplitude of the solar energy collector driven by the fan blade and the propeller when rotating.

2. The floating solar collector according to claim 1, wherein: The light transmitting plate is composed of transparent double-layer vacuum quartz glass circular plates.

3. The floating solar water collector with wind disturbance nanofluid enhanced heat transfer according to claim 1, characterized in that: The heat conducting wall is composed of a copper metal wall and L-shaped heat transfer fins, the heat transfer fins are circumferentially and uniformly distributed on the copper metal wall, and the heat transfer area is increased.

4. The floating solar collector according to claim 3, wherein: The number of the heat transfer fins is 20-50, the thickness is 2-5 mm, and the distance between the heat transfer fins and the side inner wall of the heat preservation wall is 5-20 mm.

5. The floating solar water collector with wind disturbance nanofluid enhanced heat transfer according to claim 1, characterized in that: The inclined angle of the inclined through holes of the heat preservation wall is 45-60°.

6. The floating solar water collector with wind disturbance nanofluid enhanced heat transfer according to claim 1, characterized in that: The sponge outside the inclined through holes of the heat preservation wall is matched with the filter screen.

7. The floating solar water collector with wind disturbance nanofluid enhanced heat transfer according to claim 1, characterized in that: The buoyancy plate is made of foamed plastic or hollow aluminum plate with a density less than water, is in a flat circular ring shape, and the buoyancy controls the height of the solar energy collector on the horizontal plane.

8. The floating solar water collector with wind disturbance nanofluid enhanced heat transfer according to claim 1, characterized in that: The water vapor collecting plate is in a ring-shaped plate shape, the inner wall is circumferentially and uniformly distributed with a long strip-shaped protrusion, and the inclined angle is 15-30°.

9. The floating solar water collector with wind disturbance nanofluid enhanced heat transfer according to claim 1, characterized in that: The lower end of the heat conducting wall is hung with the code through a rope, the hole in the middle of the bottom of the heat preservation wall is provided with a filter screen, and the rope passes through the filter screen.

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