Floating type solar water collector for enhancing heat exchange through wind power disturbance nanofluid
Through the design of wind-perturbing nanofluids, the problems of large temperature gradient and low heat transfer efficiency in solar water collectors are solved, more efficient heat exchange and water resource collection are achieved, and land occupation is reduced.
Patent Information
- Application Number
- CN202510119483.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2025-04-04
AI Technical Summary
Existing solar water collectors with nanofluid heat collectors are prone to problems such as large temperature gradient, low heat transfer efficiency and large footprint under light conditions.
A floating solar water collector with wind-perturbing nanofluid enhanced heat exchange was designed to drive nanofluid agitation through fan blades and propeller systems, reduce temperature gradients, and improve evaporation rate and moisture replenishment efficiency through thermal walls and sponge blocks.
It effectively reduces the temperature gradient of nanofluids, improves heat exchange efficiency, and reduces the land use area through floating design, achieving more efficient water resource collection.
Smart Images
Figure CN119754378A_ABST
Abstract
Description
Technical Field
[0001] The invention patent relates to the field of new energy utilization and water resource collection, and in particular to a floating solar water collector with wind disturbance nanofluid enhanced heat exchange. Background Art
[0002] With the rapid development of the global economy and the sharp increase in energy demand, the shortage of fresh water resources has become a major bottleneck restricting the sustainable development of the economy and society. As a clean, pollution-free and widely distributed renewable energy, solar energy has great potential for development and utilization, and provides innovative ideas for solving the problem of fresh water 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 shortages.
[0003] Nanofluid technology, by evenly dispersing nanoparticles in liquid to form a suspension, significantly improves the thermal conductivity and light absorption capacity of the liquid. Applying this technology to solar water collectors can greatly improve the solar thermal conversion efficiency and evaporation efficiency, thereby more effectively collecting water resources.
[0004] However, the current solar water collectors using nanofluids for heat collection still face some challenges. Under light conditions, large temperature gradients are easily generated inside the collector, resulting in limited heat transfer efficiency. In addition, water collector equipment often occupies a large area, affecting the effective use of land resources. Summary of the invention
[0005] The present invention provides a floating solar water collector with wind disturbance nanofluid enhanced heat exchange, which is used to solve the problems of uneven temperature inside the collector, low heat transfer efficiency, and occupied land area in the prior art.
[0006] The technical solution adopted by the present invention is: a floating solar water collector with wind-enhanced heat exchange, including fan blades, shafts, water vapor collection plates, insulation walls, matching codes, anti-rotation plates, buoyancy plates, water collection tanks, reflective walls, light-transmitting plates, filters, propellers, heat-conducting walls and sponge blocks. The fan blades are made of transparent acrylic material and are connected to the propellers through a shaft to collect wind power, thereby driving the propellers to rotate, reducing the temperature gradient of the nanofluid and increasing the 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 the heat transfer efficiency. The light-transmitting plate is made of transparent material, which can increase the light penetration effect and reduce the heat loss caused by air convection. A nanofluid inlet and outlet is provided on it for the injection and discharge of nanofluids. The evaporation chamber is surrounded by insulation walls and heat-conducting walls. The insulation wall has a plurality of inclined through holes in a circumferential array. Sponge blocks are plugged in the through holes. The evaporated water can be replenished into the water collector through the through holes with sponges and solid impurities can be isolated. The heat-conducting wall is a metal wall surface, which can increase the heat transfer area, thereby increasing the evaporation rate of the water inside the evaporation chamber. The water collecting trough is located on the upper side of the buoyancy plate. The water collecting trough and the upper end of the reflective wall are sealed by a water vapor collecting plate, which is in the shape of an annular groove. It mainly collects the water droplets condensed on the water vapor collecting plate. A drainage outlet is provided on the outside. The water vapor collecting plate is in the shape of an annular plate, and long strip-shaped protrusions are evenly distributed on the circumference of the inner wall, which can increase the contact area with water vapor, thereby improving the condensation effect. The buoyancy plate is made of high buoyancy material, in the shape of a flat ring, connected to the insulation wall on the inside, and the upper part receives the water collecting trough to control the height of the solar water collector in the horizontal plane to achieve the effect of constant floating on the water surface. The anti-rotation plate is a sheet structure, placed under the buoyancy plate, and evenly surrounds the insulation wall in a circle, increasing the rotation resistance of the water collector, reducing the rotation amplitude of the solar water collector driven by the rotation of 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 circular plate, 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 provided with a propeller, so as to 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 on the copper metal wall surface in a circumferential direction, 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 the heat transfer fins is 20-50.
[0011] Preferably, the thickness of the heat transfer fins is 2-5 mm.
[0012] Preferably, the distance between the heat transfer fin and the lateral inner wall of the insulation wall is 5-20 mm.
[0013] Preferably, the side surface of the heat-insulating wall has a plurality of inclined through holes in a circumferential array, and the inclination angle of the through holes to the vertical direction is 45°-60°, which is conducive to the placement of the sponge and the transportation of water.
[0014] Preferably, the bottom of the heat-insulating wall cooperates 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 that of water, such as foamed plastic, or a hollow aluminum plate, and is in a flat ring shape. Its buoyancy can control the height of the solar water collector in the horizontal plane to achieve the effect of constant floating on the water surface.
[0016] Preferably, the reflective wall is composed of an annular reflective lens, which can collect the light on the upper surface of the transparent plate, further improving the light absorption effect of the nanofluid.
[0017] Preferably, the water vapor collection plate is annular, with long protrusions evenly distributed around the circumference of the inner wall to increase the water vapor contact area and improve the water vapor collection efficiency. The water vapor collection plate is inclined at an angle of 15-30° to the horizontal direction to further enhance the condensation effect.
[0018] Preferably, the matching code is hung on the lower end of the heat-conducting wall by a rope, which can balance and stabilize the solar collector. The hole in the middle of the bottom of the insulation wall is also provided with a filter screen, and the rope passes through the filter screen.
[0019] The present invention adopts the above technical solution, and the wind drives the propeller to rotate, thereby stirring the nanofluid, reducing the temperature gradient, increasing the heat exchange efficiency, and reducing the land use area by floating on the water surface. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic diagram of the external structure of a floating solar water collector with wind disturbance nanofluid enhanced heat exchange according to the present invention;
[0021] Figure 2 It is a front cross-sectional structural schematic diagram of a floating solar water collector with wind disturbance nanofluid enhanced heat exchange according to the present invention;
[0022] Figure 3 This is a schematic diagram of the bottom cross-sectional structure of a floating solar water collector with wind disturbance nanofluid enhanced heat exchange according to the present invention. DETAILED DESCRIPTION
[0023] The present invention is further described in detail below in conjunction with the accompanying drawings.
[0024] The present invention discloses a floating solar water collector with wind disturbance nanofluid enhanced heat exchange, see Figure 1-3 , including fan blades 1, shaft 2, water vapor collection plate 4, insulation wall 6, matching code 7, anti-rotation plate 8, buoyancy plate 9, water collection tank 10, reflective wall 11, light-transmitting plate 12, filter 13, propeller 14, heat-conducting wall 15 and sponge block 16. The fan blade 1 is made of transparent acrylic material and is connected to the propeller 14 through a shaft 2. It collects wind power, thereby driving the propeller 14 to rotate, reducing the temperature gradient of the nanofluid and increasing the heat exchange efficiency. The heat collection 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 a transparent double-layer vacuum quartz glass circular plate, which increases the light penetration effect and reduces the heat loss caused by convection with the air. A nanofluid inlet and outlet 3 is provided on it for the injection and discharge of the nanofluid. The evaporation chamber is surrounded by the insulation wall 6 and the heat-conducting wall 15. The insulation wall 6 has a plurality of inclined through holes in a circular array. The through hole inclination angle α is 45°-60°. The through holes are filled with sponge blocks. The evaporated water can be replenished into the water collector through the through holes with sponge, and solid impurities can be isolated. A through hole is set at the bottom of the insulation wall 6, which cooperates with the filter 13 to replenish water and isolate solid impurities. The heat-conducting wall 15 is composed of a metal wall surface and L-shaped heat transfer fins, wherein the heat transfer fins are evenly distributed on the metal wall surface in the circumferential direction, which can increase the heat transfer area. Thereby, the evaporation rate of the water inside the evaporation chamber is improved. The water collecting trough 10 is located on the upper side of the buoyancy plate 9. The water collecting trough 10 and the upper end of the reflective wall 11 are sealed and connected by the water vapor collecting plate 4, which is in the shape of an annular groove. It mainly collects the water droplets condensed on the water vapor collecting plate 4. A drainage outlet 5 is provided on the outside. The water vapor collecting plate 4 is in the shape of an annular plate with an inclination angle of 15-30°. The inner wall circumference is evenly distributed with long strip-shaped protrusions, which can increase the contact area with water vapor, thereby improving the condensation effect. The reflective wall 11 is composed of annular reflective lenses, which collects the light above the light-transmitting plate 12, further increasing the light absorption effect of the nanofluid. The buoyancy plate 9 is made of a high-buoyancy material and is in the shape of a flat ring. The inner side is connected to the insulation wall 6. The upper part receives the water collecting trough 10 to control the height of the solar water collector in the horizontal plane to achieve the effect of constant floating on the water surface. The anti-rotation plate 8 is a sheet structure, which is placed under the buoyancy plate 9 and evenly surrounds the insulation wall 6 in a circle, increasing the rotation resistance of the water collector and reducing the rotation amplitude of the solar water collector driven by the rotation of the fan blades 1 and the propeller 14, thereby reducing energy loss. A matching code 7 is suspended under the heat-conducting wall 15 and is connected by a rope passing through the filter 13 to counterweight and stabilize the solar collector.
[0025] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A floating solar water collector with wind disturbance nanofluid enhanced heat exchange, characterized by: It includes fan blades, shafts, water vapor collection plates, insulation walls, matching codes, anti-rotation plates, buoyancy plates, water collection tanks, reflective walls, light-transmitting plates, filters, propellers, heat-conducting walls and sponge blocks. The fan blades are made of transparent acrylic material and are connected to the propellers through a shaft to collect wind power, thereby driving the propellers to rotate; the heat collection chamber is sealed by a light-transmitting plate and a heat-conducting wall. The heat-conducting wall is a metal wall surface, and a nanofluid inlet and outlet is provided on the heat-conducting wall for the injection and discharge of the nanofluid; the evaporation chamber is surrounded by the insulation wall and the heat-conducting wall. The insulation wall has a plurality of inclined through holes in a circular array, and sponge blocks are plugged in the through holes. The evaporated water is replenished into the water collector through the through holes with the sponge, and solid impurities are isolated The water collecting trough is located on the upper side of the buoyancy plate. The water collecting trough and the upper end of the reflective wall are sealed and connected by a water vapor collecting plate in the shape of an annular groove. The water droplets condensed on the water vapor collecting plate are collected. A drainage outlet is provided on the outside. The water vapor collecting plate is in the shape of an annular plate, and long strip-shaped protrusions are evenly distributed on the circumference of the inner wall. The buoyancy plate is made of high buoyancy material and is in the shape of a flat circular ring. The inner side is connected to the insulation wall. The upper part receives the water collecting trough to control the height of the solar water collector in the horizontal plane to achieve the effect of constant floating on the water surface. The anti-rotation plate is a sheet structure, which is placed under the buoyancy plate and evenly surrounds the insulation wall in a circle to increase the rotation resistance of the water collector and reduce the rotation amplitude of the solar water collector driven by the rotation of the fan blades and propellers.
2. The floating solar water collector with wind disturbance nanofluid enhanced heat exchange according to claim 1, characterized in that: The light-transmitting plate is composed of a transparent double-layer vacuum quartz glass circular plate.
3. The floating solar water collector with wind disturbance nanofluid enhanced heat exchange according to claim 1, characterized in that: The heat-conducting wall is composed of a copper metal wall surface and L-shaped heat-conducting fins, wherein the heat-conducting fins are evenly distributed on the copper metal wall surface in a circumferential direction to increase the heat-conducting area.
4. The floating solar water collector with wind disturbance nanofluid enhanced heat exchange according to claim 3, characterized in that: 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 lateral inner wall of the insulation wall is 5-20 mm.
5. The floating solar water collector with wind disturbance nanofluid enhanced heat exchange according to claim 1, characterized in that: The side surface of the heat-insulating wall has a plurality of inclined through holes in a circular array, and the inclination angle is 45°-60°.
6. The floating solar water collector with wind disturbance nanofluid enhanced heat exchange according to claim 1, characterized in that: The outer side of the sponge of the inclined through hole of the heat-insulating wall is matched with the filter screen.
7. The floating solar water collector with wind disturbance nanofluid enhanced heat exchange according to claim 1, characterized in that: The buoyancy plate is made of foamed plastic or hollow aluminum plate with a density lower than that of water and is in a flat ring shape. The buoyancy of the buoyancy plate controls the height of the solar water collector on the horizontal plane.
8. The floating solar water collector with wind disturbance nanofluid enhanced heat exchange according to claim 1, characterized in that: The water vapor collecting plate is in the shape of an annular plate, and long strip-shaped protrusions are evenly distributed on the circumference of the inner wall, with an inclination angle of 15-30 degrees.
9. The floating solar water collector with wind disturbance nanofluid enhanced heat exchange according to claim 1, characterized in that: The lower end of the heat-conducting wall is hung with a matching code through a rope, and a filter net is arranged in the middle hole of the bottom of the heat-insulating wall, and the rope passes through the filter net.