Underwater floating structure for floating city temperature difference power generation

Abstract

The application discloses an underwater floating structure for floating city temperature difference power generation, which comprises a floating box and waterproof temperature difference power generation units; the upper surface of the floating box is provided with a floating box platform water guide trench and a water permeable layer, the inside of the floating box is provided with a comprehensive pipe gallery and a water storage pool; a rainwater buffer system and a rainwater storage tank are arranged in the comprehensive pipe gallery, and the rainwater buffer system guides water on the comprehensive pipe gallery into the rainwater storage tank; the upper surface of the floating box is circumferentially provided with a plurality of waterproof temperature difference power generation units for supplying power to the comprehensive pipe gallery. The floating box adopts a modular assembly mode, has great advantages compared with the overall structure of a reclamation or other floating device, conforms to the green ecological building development concept, has little dependence on a site, avoids changes and damages to the surrounding environment, and can solve problems such as marine garbage and algae blockage during power generation; due to the compactness and repeatability of the modular structure, the 3D printing technology can be used to create an unlimited scale floating city group, and the construction time and economic cost are significantly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to an underwater floating power generation structure, in particular to an underwater floating structure for floating city temperature difference energy power generation. BACKGROUND

[0002] Under the background of land resource shortage and the requirement of social sustainable development, the development and utilization of marine space has become an inevitable trend of urbanization development. Marine temperature difference energy is the thermal energy of the temperature difference of seawater at different depths. Due to the action of solar radiation, the temperature of seawater decreases with the increase of water depth, resulting in temperature difference. This temperature difference contains a huge amount of energy. The hot seawater in the equatorial region sinks to the polar region due to gravity, resulting in large-scale ocean circulation, so that the temperature difference of seawater at different levels is maintained all year round, forming seawater temperature difference energy. The use of this temperature difference can realize thermal cycle power generation. This power generation method is called seawater temperature difference energy power generation.

[0003] Thermoelectric conversion technology utilizes the Seebeck effect and Peltier effect of materials to realize the direct conversion of heat energy and electric energy, and has the advantages of light weight, small size, simple structure, no pollution and noise, no mechanical transmission components, and high reliability. However, due to the long preparation period of bismuth telluride raw materials, the preparation process involves strong reducing agents and toxic solvent pollution of the environment.

[0004] The existing underwater power generation floating structure is usually an underwater turbine structure and a floating arm structure, which has the disadvantages of marine garbage and algae blockage. SUMMARY

[0005] The purpose of the present application is to overcome the shortcomings of the prior art, and to provide an energy-saving and environmentally friendly underwater floating structure for floating city temperature difference energy power generation.

[0006] Technical scheme: The underwater floating structure for floating city temperature difference energy power generation comprises a floating box and a waterproof temperature difference power generation unit; the upper surface of the floating box is provided with a floating box platform water guide trench and a water permeable layer, and the inside is provided with a comprehensive pipe gallery and a water storage tank; a rainwater buffer system and a rainwater storage tank are arranged in the comprehensive pipe gallery, and the rainwater buffer system introduces water on the comprehensive pipe gallery into the rainwater storage tank; a plurality of waterproof temperature difference power generation units for supplying power to the comprehensive pipe gallery are arranged circumferentially on the upper surface of the floating box.

[0007] Further, communication optical cables, power optical cables, gas pipelines, heating pipelines, water supply and drainage pipelines and garbage pipelines are arranged in the comprehensive pipe gallery.

[0008] Further, the floating box is a prefabricated concrete component, and a modular assembly method is adopted. The top layer of the floating box is made of ecological concrete material.

[0009] Further, the waterproof temperature difference power generation unit comprises a waterproof ground polymer thermoelectric sheet and a heat dissipation sheet, and the waterproof ground polymer thermoelectric sheet is arranged on the surface of the heat dissipation sheet.

[0010] Further, the waterproof ground polymer thermoelectric sheet comprises a copper-clad ceramic upper substrate, a copper-clad ceramic lower substrate, ground polymer bismuth telluride P-type thermoelectric particles, ground polymer bismuth telluride N-type thermoelectric particles and a wire, the ground polymer bismuth telluride P-type thermoelectric particles and the ground polymer bismuth telluride N-type thermoelectric particles are arranged between the copper-clad ceramic upper substrate and the copper-clad ceramic lower substrate, and the wire is connected with an energy storage device or an energy supply device.

[0011] Further, the ground polymer bismuth telluride P-type thermoelectric particles and the ground polymer bismuth telluride N-type thermoelectric particles are both made of river sand, metakaolin, slag, silica fume, alkali activator and bismuth telluride powder.

[0012] Further, the floating box platform water guide ditch radiates from the center of the floating box to the periphery, and is provided with an inclination angle of 3-5‰, so that the rainwater is introduced into a rainwater buffer system arranged on the upper part of the comprehensive pipe gallery and then enters a rainwater storage bin suspending the comprehensive pipe gallery in the interior of the floating box.

[0013] Further, the porosity of the water permeable layer is 15-25%. Compared with the traditional asphalt concrete and cement concrete road pavement, the water permeable layer has a larger porosity and a stronger water permeability, and under the premise of ensuring the bearing capacity and durability, the rainwater falling in the city can be rapidly infiltrated into the road surface, the urban rainstorm pressure is reduced, the urban underlying surface hydrothermal circulation mechanism is improved, the road pavement temperature is reduced, the urban heat island effect is relieved, and positive effects are also achieved in improving driving safety, dust absorption and noise reduction, energy saving and emission reduction and the like.

[0014] Further, the surface of the waterproof temperature difference power generation unit is provided with the water permeable layer, and the water permeable layer is used to build a non-motor vehicle lane, so that the water permeable material is fully covered on the surface of the marine floating city platform.

[0015] Further, the rainwater buffer system comprises one or more of a plant retention tank, a concave green belt, a material storage water ditch, a soil reinforcement and a water retaining stone, so as to weaken the flow speed of the rainwater, and holes are arranged during pouring of the ecological concrete in the region to improve the water guiding efficiency.

[0016] Working principle: the marine floating city with the function of a "sponge city" combines artificial means and natural ways to ensure that the city drainage and flood control are not affected, forms a temperature difference between the heat generated in the floating city and seawater, and generates power through the thermoelectric sheet to supply energy to the city.

[0017] Advantages: compared with the prior art, the present application has the following obvious characteristics:

[0018] 1. The floating box adopts a modular assembly method, which has great advantages compared to the overall structure of reclamation or other floating devices, and conforms to the green and ecological building development concept. The modular building has little dependence on the site, avoids changes and damage to the surrounding environment, and can solve problems such as marine garbage and algae blockage during power generation;

[0019] 2. Due to the compactness and repeatability of the modular structure, 3D printing technology can be used in the future to create an unlimited scale of floating city groups, thereby significantly reducing construction time and economic cost;

[0020] 3. The comprehensive pipe gallery can be prefabricated into different spans and layers according to needs, better dividing space and arranging pipelines. It has low construction cost, high utilization rate, convenient maintenance and repair, and convenient pipeline laying;

[0021] 4. The floating box has a rainwater buffering and draining system and a rainwater storage and purification system. The floating box structure has natural structural advantages, and a floating box platform water guide ditch is set up to form a rainwater self-flowing path without excavation, fully utilizing the gravitational potential energy. The energy consumption is almost zero while storing rainwater, embodying the principle of sustainable urban design;

[0022] 5. The water is stored in the water storage tank and taken when needed, improving water efficiency and saving the cost of desalinated seawater and cross-regional water transfer;

[0023] 6. It can effectively improve construction quality, reduce energy consumption, and shorten construction period. Standard prefabricated parts are always available to improve the efficiency of emergency repair after accidents, and to minimize the impact on human production and life. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic diagram of the present application;

[0025] Figure 2 is a structural schematic diagram of the waterproof temperature difference power generation unit 2 of the present application. DETAILED DESCRIPTION

[0026] As Figure 1The floating box 1 of the underwater floating structure for floating city temperature difference power generation is a prefabricated concrete component, and the top layer is made of ecological concrete material. The upper surface of the floating box 1 has a floating box platform water guide channel 3 and a water permeable layer 4, and is internally provided with a comprehensive pipe gallery 5 and a water storage tank 6. The floating box platform water guide channel 3 radiates from the center of the floating box 1 to the periphery, and is provided with an inclination angle of 3-5‰. The porosity of the water permeable layer 4 is 15-25%. The comprehensive pipe gallery 5 is provided with a rainwater buffer system 7 and a rainwater storage bin 8. The rainwater buffer system 7 introduces water on the comprehensive pipe gallery 5 into the rainwater storage bin 8. The upper surface of the floating box 1 is circumferentially provided with a plurality of waterproof temperature difference power generation units 2 for supplying power to the comprehensive pipe gallery 5. The comprehensive pipe gallery 5 is produced by factory standardization, and is assembled and constructed by modularization. The comprehensive pipe gallery 5 is also provided with a communication optical cable 9, a power optical cable 10, a gas pipeline 11, a heating pipeline 12, a water supply and drainage pipeline 13 and a garbage pipeline 14. The waterproof temperature difference power generation unit 2 has a water permeable layer 4 on the surface, and a non-motor vehicle lane is constructed to realize full coverage of the ocean floating city platform surface with water permeable material. The waterproof temperature difference power generation unit 2 is used for power supply of residential areas, commercial and industrial facilities, transportation systems, public facilities and the like.

[0027] As Figure 2 , the waterproof temperature difference power generation unit 2 includes a waterproof geopolymer thermoelectric sheet 21 and a heat sink 22, and the waterproof geopolymer thermoelectric sheet 21 is arranged on the surface of the heat sink 22. The waterproof geopolymer thermoelectric sheet 21 includes a copper-clad ceramic upper substrate 211, a copper-clad ceramic lower substrate 212, geopolymer bismuth telluride P-type thermoelectric particles 213, geopolymer bismuth telluride N-type thermoelectric particles 214 and a wire 215. The copper-clad ceramic upper substrate 211 and the copper-clad ceramic lower substrate 212 are provided with a plurality of geopolymer bismuth telluride P-type thermoelectric particles 213 and geopolymer bismuth telluride N-type thermoelectric particles 214, and are connected with an energy storage device or an energy supply device through the wire 215. The raw materials of the geopolymer bismuth telluride P-type thermoelectric particles 213 and the geopolymer bismuth telluride N-type thermoelectric particles 214 include river sand, cementitious material, alkali activator and bismuth telluride powder. The weight ratio of the amount of river sand to the amount of cementitious material is 1:2-4, the volume ratio of the total weight of river sand and cementitious material to the amount of alkali activator is 100:20-35, and the weight ratio of the total weight of river sand and cementitious material to the amount of bismuth telluride powder is 100:20-40. The cementitious material is a mixture of metakaolin, slag and silica fume. The content of metakaolin in the cementitious material is 70-90wt%, the content of slag is 5-20wt%, and the content of silica fume is 5-10wt%. The alkali activator is a mixed solution of a strong alkali solution and a water glass solution with a weight ratio of 3:6-8. The slag is from Datang Nanjing Power Plant, and has a specific surface area of 600-800m 2 / kg, a sieve residue of 45μm square hole screen <1%, and a total content of Al2O3 and SiO2 in the slag ≥50wt%. The particle size of the silica fume is 0.1-0.3μm, and the specific surface area of the silica fume is 15000-30000m 2 / kg.

[0028] Preparation of the geopolymer bismuth telluride P-type thermoelectric particles 213 and the geopolymer bismuth telluride N-type thermoelectric particles 214:

[0029] S1, the river sand and cementing material are mixed by stirring at a speed of 400 r / min for 3 min, then the polytelluride bismuth powder is added, and finally the alkali activator is added. The weight ratio of the amount of river sand and cementing material is 1:4, the content of metakaolin in the cementing material is 70wt%, the content of slag is 20wt%, the content of silica fume is 10wt%, the weight ratio of the total weight of river sand and cementing material and the weight of polytelluride bismuth powder is 100:20, the volume ratio of the total weight of river sand and cementing material and the alkali activator is 100:30, and the alkali activator is an 8mol / L NaOH solution compounded with a water glass solution at a weight ratio of 3:7.

[0030] S2, the intermediate material obtained in step S1 is transferred into an electrode mold and cured at a temperature of 20℃ for 24h, then demolded and polished to obtain the geopolymer bismuth telluride P-type thermoelectric particles 213 and the geopolymer bismuth telluride N-type thermoelectric particles 214.

[0031] The sample of the embodiment is assembled into a waterproof geopolymer thermoelectric sheet 21, the compressive strain is 27MPa, the bending strength is 36MPa, the electrical conductivity is 6.8×10 -4 S / m, the Seebeck coefficient is 214μV / K, and the ZT value is 0.361. It can be seen that the underwater floating structure for floating city thermoelectric power generation obtained in the embodiment has stable performance and high thermoelectric power generation efficiency, and can be used in floating city thermoelectric power generation.

Claims

1. An underwater floating structure for floating city temperature difference energy power generation, characterized in that: The utility model provides a kind of floating box and waterproof temperature difference power generation unit (2);The upper surface of the floating box (1) is provided with floating box platform water guide ditch (3) and water-permeable layer (4), inside is provided with comprehensive pipe gallery (5) and reservoir (6);Rainwater buffer system (7) is provided in the comprehensive pipe gallery (5), rainwater storage bin (8), and the rainwater buffer system (7) is introduced into rainwater storage bin (8) on the water of comprehensive pipe gallery (5);The upper surface of the floating box (1) is circumferentially provided with several waterproof temperature difference power generation units (2) for power supply to comprehensive pipe gallery (5); The floating box (1) is a prefabricated concrete member. The waterproof temperature difference power generation unit (2) includes a waterproof geopolymer thermoelectric sheet (21) and a heat sink (22), and the heat sink (22) is provided with a waterproof geopolymer thermoelectric sheet (21) on the surface. The waterproof geopolymer thermoelectric sheet (21) includes a copper-clad ceramic upper substrate (211), a copper-clad ceramic lower substrate (212), geopolymer bismuth telluride P-type thermoelectric particles (213), geopolymer bismuth telluride N-type thermoelectric particles (214), and a wire (215). The copper-clad ceramic upper substrate (211) and the copper-clad ceramic lower substrate (212) are provided with a plurality of geopolymer bismuth telluride P-type thermoelectric particles (213) and geopolymer bismuth telluride N-type thermoelectric particles (214) therebetween, and are connected to an energy storage device or an energy supply device through the wire (215). The geopolymer bismuth telluride P-type thermoelectric particles (213) and the geopolymer bismuth telluride N-type thermoelectric particles (214) are each made of river sand, metakaolin, slag, silica fume, an alkali activator, and bismuth telluride powder. The cementitious material is a mixture of metakaolin, slag, and silica fume. The weight ratio of the river sand to the cementitious material is 1:2-4, the volume ratio of the total weight of the river sand and the cementitious material to the alkali activator is 100:20-35, and the weight ratio of the total weight of the river sand and the cementitious material to the bismuth telluride powder is 100:20-40. The content of metakaolin in the cementitious material is 70-90 wt%, the content of slag is 5-20 wt%, and the content of silica fume is 5-10 wt%.

2. The underwater floating structure for floating city temperature difference energy power generation according to claim 1, characterized in that: The comprehensive pipe gallery (5) is also provided with a communication optical cable (9), a power optical cable (10), a gas pipeline (11), a heating pipeline (12), a water supply and drainage pipeline (13), and a garbage pipeline (14).

3. The underwater floating structure for floating city temperature difference energy power generation according to claim 1, characterized in that: The top layer of the floating box (1) is made of ecological concrete material.

4. The underwater floating structure for floating city temperature difference energy power generation according to claim 1, characterized in that: The floating box platform water guide ditch (3) radiates from the center of the floating box (1) to the periphery and is inclined at an angle of 3-5‰.

5. The underwater floating structure for floating city temperature difference energy power generation according to claim 1, characterized in that: The porosity of the water-permeable layer (4) is 15-25%.

6. The underwater floating structure for floating city temperature difference energy power generation according to claim 1, characterized in that: The waterproof temperature difference power generation unit (2) is provided with a water-permeable layer (4) on the surface.

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