CN102611353B - Device for generating electricity by collecting environmental low-grade energy source - Google Patents

Device for generating electricity by collecting environmental low-grade energy source Download PDF

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Publication number
CN102611353B
CN102611353B CN201210103715.0A CN201210103715A CN102611353B CN 102611353 B CN102611353 B CN 102611353B CN 201210103715 A CN201210103715 A CN 201210103715A CN 102611353 B CN102611353 B CN 102611353B
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China
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energy
fluid reservoir
nanochannel
nanometer channel
electrode
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CN201210103715.0A
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Chinese (zh)
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CN102611353A (en
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胡雪蛟
刘抗
黄志�
李昌铮
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武汉大学
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Abstract

The invention relates to an environmental energy utilization system, in particular relates to an environmental low-grade energy utilization system by utilizing capillary force and a nanometer channel double electric layer effect, comprising a liquid feeding pipe, wherein the liquid feeding pipe is connected with a nanometer channel, two electrodes are closely adhered at two ends of the nanometer channel, and a middle liquid storage room is connected with the other side of the nanometer channel and is connected with an evaporation film. Electrolyte solution is driven by the capillary force generated by evaporation of liquid on the evaporation film to flow through the nanometer channel, and electricity generation is carried out on ion selection by utilizing the nanometer channel. The invention provides a new energy source utilizing method which is clean and high-efficiency and the great prospect on various energy aspects in a collection utilization environment can be realized.

Description

A kind of device of collecting the generating of environment low-grade energy

Technical field

The present invention relates to a kind of environmental energy and utilize system, relate in particular to a kind of device of the collection environment low-grade energy generating that utilizes capillary force and nanochannel electric double layer effect.

Background technology

Under the increasingly severe background of Energy situation and environmental pollution, the Conversion of Energy mode of seeking clean and effective is the concern that the recycling of the core content of current energy research work, particularly low-grade energy is more and more subject to people.In the environment of our life, there is a large amount of energy, comprise wind energy, solar energy and heat energy etc.The major way that utilizes now solar power generation is photovoltaic generation and solar energy thermal-power-generating, is mainly to utilize blower fan and utilize wind power generation.Solar power generation and wind power generation all exist and cut in and out, and therefore the problem that can not power is continuously difficult to realize grid-connected on a large scale.Wherein comparatively possible solution is a wind light mutual complementing, and wind light mutual complementing, now still in conceptual phase, still has a lot of thorny problems to need to solve.

The generating of nanochannel electric double layer is a kind of generation mode that utilizes surface of solids electric double layer effect to carry out power conversion, its operation principle as shown in Figure 1, in solution, the surface of solids is owing to optionally adsorbing certain ion from solution and charged in the surface of self, thereby forms certain Potential Distributing at the surface of solids.Make near the liquid of powered surfaces is to equate with surface of solids amount of charge but the contrary counter ion of symbol mostly.Powered surfaces and counter ion form electric double layer, and electric double layer thickness is 0.2 to 20 nanometer.The nanochannel electric double layer electric double layer that utilizes the surface of solids to form in electrolyte solution that generates electricity, make electrolyte solution in the time flowing through nanochannel, only allow a kind of electrical ion to pass through, thereby form the separation of positron-electron, single displacement of planting electric charge forms electric current, thereby produces electric energy.

All nanochannel electric double layer electricity generation systems flow through nanochannel taking high-grade pressure energy as power drive electrolyte solution before this, but because the efficiency of nanochannel electric double layer generation mode itself is low, therefore this method need to consume a large amount of high-grade pressure energies, has huge limitation in practical application.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of device of collecting the generating of environment low-grade energy.This device utilizes capillary force to replace high-grade pressure to drive electrolyte solution to generate electricity by nanochannel, and utilize evaporation of water automatically to collect various low-grade energies in environment (to comprise heat energy, wind energy, illumination) maintain REFRIGERATION SYSTEM DRIVEN BY CAPILLARY FORCE power endlessly, thus reach the effect of collecting various energy generatings in environment.

The technical solution adopted in the present invention is:

A device of collecting the generating of environment low-grade energy, it comprises feed tube and fluid reservoir, and fluid reservoir surface is upwards evaporating film, and feed tube is connected by nanochannel with fluid reservoir; In feed tube, there is Ag electrode, in fluid reservoir, have Ag 2cO 3or AgO electrode, Ag electrode and Ag 2cO 3or AgO electrode connects load or energy storage device by wire.

When work, in feed tube and fluid reservoir, be full of carbon acid solution.

Nanochannel can be single nanotubes, also can be by many integrated the forming of nanotubes.

Described evaporating film is furnished with the passage of nanometer or micro-meter scale, and the carbon acid solution in fluid reservoir is by these passages of capillary force inspiration evaporation.

Compared with prior art, beneficial effect of the present invention is:

(1) utilize capillary force to replace high-grade pressure-driven nanochannel electric double layer electricity generation system, and utilize various low-grade energies in environment to comprise heat energy, wind energy, illumination impels the evaporation of water at liquid surface of capillarity, maintain capillary suction force endlessly, utilize the various low-grade energy generatings of environment thereby this system can be collected simultaneously.

(2) in system, use carbon acid solution as working media, when carbonic acid is when concentration raises under gas-liquid interface, can automatic classifying generate carbon dioxide and separate out, make this system both effectively secondary utilize carbon dioxide, again can uninterrupted work.

Brief description of the drawings

Fig. 1 is nanochannel electric double layer generating fundamental diagram.

Fig. 2 is structural representation of the present invention.

Wherein: 1-carbon acid solution, 2-feed tube, 3-Ag electrode, 4-nanochannel, 5-Ag 2cO 3or AgO electrode, 6-evaporating film, 7-fluid reservoir, 8-load or energy storage device.

Fig. 3 is Blast Furnace Top Gas Recovery Turbine Unit (TRT) generated output and wind speed graph of relation.

Fig. 4 is Blast Furnace Top Gas Recovery Turbine Unit (TRT) wind energy utilization efficiency and wind speed graph of relation.

Fig. 5 is Blast Furnace Top Gas Recovery Turbine Unit (TRT) generated output and temperature relation curve chart.

Fig. 6 is Blast Furnace Top Gas Recovery Turbine Unit (TRT) generated output and intensity of illumination graph of relation.

Embodiment

Further illustrate the present invention below in conjunction with drawings and Examples.

Embodiment 1

Referring to Fig. 2, a kind of device of collecting the generating of environment low-grade energy, it comprises feed tube 2 and fluid reservoir 7, and fluid reservoir 7 surface is upwards evaporating film 6, and feed tube 2 is connected by nanochannel 4 with fluid reservoir 7; In feed tube 2, there is Ag electrode 3, in fluid reservoir, have Ag 2cO 3or AgO electrode 5, Ag electrode and Ag 2cO 3or AgO electrode connects load or energy storage device 8 by wire.

When work, the carbon acid solution of fluid reservoir constantly evaporates by the gas-liquid interface in evaporating film, and evaporating film is nanometer or micron perforated membrane, evaporating film produce capillary force provide actuating force endlessly for carbon acid solution evaporation.The electric energy that single displacement of planting charge ion in nanochannel 4 produces is by Ag and Ag 2cO 3or AgO electrode is load supplying or is stored in energy storage device.

This device running: referring to Fig. 2, before device brings into operation, by feed tube upward,, exert pressure and make the inner carbon acid solution of filling of fluid reservoir to Implantation acid solution in fluid reservoir by feed tube.Then feed tube is placed under carbon acid solution liquid level, makes feed tube and fluid reservoir all be full of carbon acid solution.

When work, along with carbon acid solution evaporation, liquid level reduces, and the thin channel of evaporating film inside provides huge capillary suction force that the solution below evaporating film is up aspirated, and the flow that solution up flows equals the evaporation flow of moisture on evaporating film.Along with the suction of capillary force in evaporating film, solution keeps certain flow to pass through the nanochannel in feed tube.Due to the electric double layer effect of the surface of solids, nanochannel inner wall surface forms the electric double layer with specific charge, make to only have the ion of oppositely charged could pass through nanochannel, therefore in nanochannel, form single displacement (being electric current) of planting ion, the two ends of nanochannel form the accumulation regions with different charge ions, react: Ag+CO on one of them electrode 3 2-→ Ag 2cO 3+ 2e -.And react on another electrode: Ag 2cO 3+ 2e -→ Ag+CO 3 2-(or Ag 2o+2H ++ 2e -→ Ag+H 2o).The direction reacting is relevant with the material of nanochannel.By such reaction, produce electronics endlessly and pass through external circuit, thereby power to external loading.What system was spontaneous utilizes the various energy in environment, comprises solar energy, and wind energy and heat energy etc. is impelled the evaporation of liquid on evaporating film, for system operation provides actuating force.In environment, available energy density has determined the evaporation rate of capillary liquid on interface, and evaporation rate has determined flow rate of liquid in nanochannel, thereby has determined generated output.On the gas-liquid interface of evaporating film, due to the continuous evaporation of moisture, the carbonate concentration below gas-liquid interface is more and more higher, and when height is to the solubility of carbonic acid, carbonic acid automatic classifying becomes carbon dioxide to separate out, and can not stop up pore.Whole system does not need to consume additional energy, and the variation of the composition of electrode can make it that back reaction occur by the mode of exchange electrode or change flow of solution direction and be returned to initial conditions, and therefore whole system does not consume additional energy.

Embodiment 2

The utilization of wind energy.Referring to Fig. 2, described evaporating film is nano-porous materials, and area is 1cm 2, the concentration of carbon acid solution is 3 × 10 -4mol/L, nanochannel is by multiple length 50 μ m, wide 55nm, the parallel nanochannel composition of high 4.5mm, number of active lanes is 5 × 10 4.Under the environment of 25 degree, with the different wind speed parallel actions of 0-10m/s, in evaporating film, the architectural feature of other parts is identical with embodiment 1.By calculating the increase that can obtain along with wind speed, system power output increases, and in the time that wind speed is 10m/s, the power output of system is 52.1 μ W, referring to Fig. 3.This system has high apparent wind energy utilization efficiency, and wind speed is lower, and efficiency is higher, can reach more than 100%, referring to Fig. 4, illustrates that the heat energy in environment has also obtained utilization to a certain degree.

Embodiment 3

UTILIZATION OF VESIDUAL HEAT IN.Referring to Fig. 2, described evaporating film material is nano-porous materials, and area is 1cm 2, the concentration of carbon acid solution is 3 × 10 -4mol/L.Nanochannel is by multiple length 50 μ m, wide 55nm, and the parallel nanochannel composition of high 4.5mm, number of active lanes mates to obtain the highest generated output with waste heat supply temperature.With the incogruent hotwork of 30 to 80 degree, for evaporating film, the architectural feature of other parts is identical with embodiment 1.Can draw by calculating, referring to Fig. 5, along with the rising of waste heat supply temperature, system power output increases.When evaporating temperature is 80 while spending, the power output of system is 55.4 μ W.

Embodiment 4

The utilization of solar energy.Referring to Fig. 2, described evaporating film material is nano-porous materials, and area is 1cm 2, the concentration of carbon acid solution is 3 × 10 -4mol/L.Nanochannel is by multiple length 50 μ m, wide 55nm, and the parallel nanochannel composition of high 4.5mm, number of active lanes is 2850.Use 0-220W/m 2different solar irradiations act on evaporating film, the architectural feature of other parts is identical with embodiment 1.Can draw by calculating, referring to Fig. 6, along with the increase of Intensity of the sunlight, system power output increases.When intensity of illumination is 220W/m 2time, the power output of system is 1.81 μ W.

Apparatus of the present invention can be collected the low-grade energy in surrounding enviroment automatically, and it is converted into the electric energy that can externally export.Although power is not very high, has very large room for promotion, the invention provides a kind of new approaches of collecting low-grade energy in environment and being translated into electric energy.

The present invention can be the electronic device energy supply of the low power requirement in microenvironment, as sensor.In addition, this method is to utilize the phase transformation of water to carry out power conversion, and heat can be spontaneously taken away in the phase transformation of water, in the environment or device that therefore need to dispel the heat at some, this invention has sweating refrigerating function simultaneously, has good application prospect in nano-device integration system.

Protection scope of the present invention is not limited to the above embodiments, and obviously, those skilled in the art can carry out various changes and distortion and not depart from spirit of the present invention the present invention, and the intent of the present invention also comprises these changes and distortion interior.

Claims (3)

1. collect the device of environment low-grade energy generating for one kind, comprise feed tube (2) and fluid reservoir (7), fluid reservoir (7) surface is upwards evaporating film (6), described evaporating film (6) is furnished with the passage of nanometer or micro-meter scale, and the carbon acid solution in fluid reservoir is by these passages of capillary force inspiration evaporation; Feed tube (2) is connected by nanochannel (4) with fluid reservoir (7); In feed tube (2), there is Ag electrode (3), in fluid reservoir, have Ag 2cO 3or AgO electrode (5), Ag electrode (3) and Ag 2cO 3or AgO electrode (5) connects load or energy storage device (8) by wire, in feed tube when work (2) and fluid reservoir (7), be full of carbon acid solution.
2. device according to claim 1, is characterized in that, nanochannel (4) is single nanotubes or by many integrated the forming of nanotubes.
3. device according to claim 1, is characterized in that, the concentration of described carbon acid solution is 3 × 10 -4mol/L.
CN201210103715.0A 2012-04-11 2012-04-11 Device for generating electricity by collecting environmental low-grade energy source CN102611353B (en)

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103321862B (en) * 2013-06-24 2015-06-10 武汉大学 Device for generating power by aid of plant transpiration
CN103973170A (en) * 2014-04-28 2014-08-06 国家电网公司 Mechanical energy and electric energy conversion device
CN104811092B (en) * 2015-05-19 2017-05-31 武汉大学 A kind of system generated electricity using liquid pyroelectric effect
CN105369284A (en) * 2015-11-18 2016-03-02 武汉大学 Thermal injection electricity and hydrogen co-production device
CN106982008A (en) * 2016-01-18 2017-07-25 华中科技大学 One kind evaporation induction liquid TRT
CN109458314B (en) * 2018-10-25 2020-02-18 西北工业大学 Method and device for realizing electric energy collection by using micro-droplets

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2297685Y (en) * 1997-06-11 1998-11-18 梅群峰 Solar steam generator
CN1638850A (en) * 2002-02-26 2005-07-13 克雷维斯技术及创新股份有限公司 Ceramic membrane based on a substrate containing polymer or natural fibres, method for the production and use thereof
CN101635532A (en) * 2009-08-25 2010-01-27 北京大学 Method for converting free energy stored in ion concentration gradient form into electric energy
CN101764533A (en) * 2010-01-13 2010-06-30 重庆大学 Power generation and hydrogen production combined circulating system based on alkali metal thermoelectric conversion

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2297685Y (en) * 1997-06-11 1998-11-18 梅群峰 Solar steam generator
CN1638850A (en) * 2002-02-26 2005-07-13 克雷维斯技术及创新股份有限公司 Ceramic membrane based on a substrate containing polymer or natural fibres, method for the production and use thereof
CN101635532A (en) * 2009-08-25 2010-01-27 北京大学 Method for converting free energy stored in ion concentration gradient form into electric energy
CN101764533A (en) * 2010-01-13 2010-06-30 重庆大学 Power generation and hydrogen production combined circulating system based on alkali metal thermoelectric conversion

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