CN104022689A - Solar phase-change energy storage thermoelectric power generation device and lighting system - Google Patents
Solar phase-change energy storage thermoelectric power generation device and lighting system Download PDFInfo
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- CN104022689A CN104022689A CN201410279139.4A CN201410279139A CN104022689A CN 104022689 A CN104022689 A CN 104022689A CN 201410279139 A CN201410279139 A CN 201410279139A CN 104022689 A CN104022689 A CN 104022689A
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Abstract
The invention relates to a solar phase-change energy storage thermoelectric power generation device and a lighting system. The power generation device comprises a thermoelectric power generation plate, and the thermoelectric power generation plate comprises a heat absorption groove-type groove substrate, a thermoelectric power generation module and cooling fins. Grooves of the heat absorption type groove-type substrate are filled with phase-change energy storage material. A heat conduction plate is encapsulated through heat conduction glue, and the outer layer of the heat conduction plate is coated with heat absorption material. The hot end of the thermoelectric power generation module tightly makes contact with the high-temperature end of the heat absorption groove-type substrate, and the cold end of the thermoelectric power generation module is connected with the cooling fins through the heat conduction plate and the heat conduction glue. The lighting system comprises the power generation device, a solar lighting controller, a storage battery and a lighting lamp. Due to the unique structure of the heat absorption groove-type substrate, the heat absorption groove-type substrate has excellent heat absorption and heat conduction effects on solar radiation, the heat absorption groove-type substrate can be combined with the phase-change energy storage material to improve temperature stability of the hot end of the thermoelectric power generation module of the system, and thermoelectric power generation efficiency is improved.
Description
Technical field
The present invention relates to field of solar thermal power generation, more particularly, relate to a kind of solar energy phase transition energy storage type temperature difference electricity generation device and illuminator.
Background technology
Solar energy is the solar interior energy that continuously nuclear fusion reaction process produces.The annual radiation intensity of 1 24h of earth surface is 0.2Kw/m
2, be equivalent to have the energy of 102000TW; Solar energy combines and has certain development prospect with LED illumination.Although solar energy resources total amount is equivalent to more than 10,000 times of the energy that the present mankind utilize, the energy density of solar energy is low, and it varies in different localities, because of time become, this is to develop the subject matter that solar energy faces.These features of solar energy make its effect in illuminator also be subject to certain limitation.At present, in the prior art of solar illuminating system and application, mainly adopt solar-energy photo-voltaic cell.But the production cost of solar-energy photo-voltaic cell is high, efficiency is lower, become its bottleneck of applying of restriction; Because the luminous energy projecting on solar photovoltaic cell panel only has sub-fraction to change into electric energy, this is the impact that is subject to several factors because of it.The efficiency of solar-energy photo-voltaic cell is more much lower than calculated value.The photon that only has those energy to be greater than its material " forbidden band " width in solar-energy photo-voltaic cell could produce electron-hole pair in the time being absorbed in photovoltaic material, and those energy are less than " forbidden band " even if the photon of width is absorbed and can not produces electron-hole pair, and can only make photovoltaic material heating slattern; In the time that photovoltaic material " forbidden band " width increases, the total solar energy being absorbed by photovoltaic material will be fewer and feweri.1 DEG C of the every rising of solar-energy photo-voltaic cell temperature, maximum power reduces 0.4%; Therefore, although larger in sun in summer emittance, if drawn badly, cause solar-energy photo-voltaic cell temperature to rise too high, also may not can export very large power.Therefore how in unit are, to make the irradiation energy of solar energy be fully used, just become a large research topic of development solar lighting industry.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of solar energy phase transition energy storage type temperature difference electricity generation device and illuminator are provided, to solve that Yin Wendu that existing solar-energy photo-voltaic cell exists raises and the maximum power that causes reduces, the problem of Efficiency Decreasing.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of solar energy phase transition energy storage type temperature difference electricity generation device, comprise solar energy phase transition energy storage type thermo-electric generation plate, described solar energy phase transition energy storage type thermo-electric generation plate comprises heat absorption type concave groove substrate, temperature-difference thermoelectric electricity generation module and radiating fin, in the groove of described heat absorption type concave groove substrate, be filled with phase-changing energy storage material, described heat absorption type concave groove substrate top is provided with heat-conducting plate, described heat-conducting plate encapsulates by heat-conducting glue, and the skin of described heat-conducting plate is coated with heat-absorbing material; The temperature end close contact of the hot junction of described temperature-difference thermoelectric electricity generation module and heat absorption type concave groove substrate, the cold junction of temperature-difference thermoelectric electricity generation module is connected with radiating fin with heat-conducting glue by heat-conducting plate.
In such scheme, described phase-changing energy storage material comprises solid-solid phase transition material and conductive powder, described solid-solid phase transition material is aminomethyl propylene glycol (amino-methyl-propanediol, AMPD), (D) 2-camphanone [(D) camphor, DC], aminomethyl propylene glycol [AMPD] and (D) 2-camphanone [(D) camphor, DC] combination, pentaerythrite [petaerythritol, PE] and DOPCP [neopentylglycol, NPG] combination, (D) 2-camphanone [(D) camphor, DC] and succinonitrile [succinonitrile, SCN] combination or (D) 2-camphanone [(D) camphor, DC] with the combination of DOPCP [NPG], described conductive powder is CNT (carbon nano-tube), graphite powder, copper powder or ceramic powder.
In such scheme, described phase-changing energy storage material is nano TiO 2 microcapsule coated inorganic matter phase-change material, and described inorganic matter phase-change material is: Mg (NO
3)
36H
2o/MgCl
2, Mg (NO
3)
36H
2o/Al (NO
3)
39H
2o, Mg (NO
3)
36H
2o/NH
4nO
3, Mg (NO
3)
36H
2o/LiNO
3, LiNO
3/ NH
4nO
3/ KNO
3, Ca (NO
3)
2/ LiNO
3/ KNO
3, Na
2p
2o
410H
2o or NH
4al (SO
4) 26H
2o.
In such scheme, described phase-changing energy storage material is the compound of expanded graphite and barium hydroxide, or the compound of expanded graphite and paraffin.
In such scheme, described heat absorption type concave groove substrate is made up of copper, copper alloy, aluminium alloy or pottery.
In such scheme, described temperature-difference thermoelectric electricity generation module comprises some series connection or/and thermo-electric generation sheet monomer in parallel, and the shaped as frame gap between described thermo-electric generation sheet monomer and thermo-electric generation sheet monomer is filled up by use heat-insulating material.
In such scheme, described heat-insulating material is blanket of glass wool, mineral wool, expanded perlite, diatomite or rock wool glass cloth seam plate.
The present invention also provides a kind of illuminator of solar energy phase transition energy storage type thermo-electric generation, comprise above-mentioned Blast Furnace Top Gas Recovery Turbine Unit (TRT), also comprise solar lighting controller, storage battery and illuminating lamp, described solar lighting controller is connected with solar energy phase transition energy storage type thermo-electric generation plate, and described storage battery is connected with solar lighting controller respectively with illuminating lamp.
In such scheme, described storage battery is lead acid accumulator, nickel chromium triangle storage battery, nickel-hydrogen accumulator or lithium-ions battery.
In such scheme, described illuminating lamp is LED lamp, electricity-saving lamp, low-pressure sodium lamp, high-pressure sodium lamp or electrodeless electromagnetic sense light.
In such scheme, described solar lighting controller has the control function of illuminating lamp, has light-operated, time control function; Have and automatically cut control loading functional night; There are the accumulator cell charging and discharging of control, temperature adjusting, maximal power tracing, over-charge protective, short-circuit protection, reverse connecting protection etc.; There is in different temperatures and different solar irradiation situation Maximum Power Output function intelligently, so that the illuminator of solar energy phase transition energy storage type thermo-electric generation has very high efficiency simultaneously.
The course of work of a kind of solar energy phase transition energy storage type temperature difference electricity generation device provided by the invention and illuminator is as follows:
Solar light irradiation, on the heat-absorbing paint of heat-conducting plate extexine, and is directly conducted to the phase-changing energy storage material (PCM) of loading in heat absorption type groove substrate and concave groove substrate absorbing the heat of sunlight by heat-conducting plate.Along with the sunlight irradiation time increases, concave groove substrate and phase-changing energy storage material (PCM) constantly absorb heat and temperature raises; In the time that rising temperature reaches the phase transition temperature of phase-changing energy storage material (PCM), phase-changing energy storage material (PCM) occurs to change mutually, and stores the serial heat that sunlight irradiation produces; Heat absorption type concave groove substrate is in the condition of high temperature simultaneously.The temperature end close contact of the hot junction of temperature-difference thermoelectric electricity generation module and heat absorption type concave groove substrate, the cold junction of temperature-difference thermoelectric electricity generation module is connected with radiating fin with heat-conducting glue by heat-conducting plate.Phase-changing energy storage material (PCM) is under the long-time acute irradiation of sunlight, and temperature rise is to phase transition point, and phase-changing energy storage material (PCM) produces phase transformation and store heat; When a little less than sunlight when irradiation (cloud sunlight), temperature drops to lower than phase transition point, PCM produces phase transformation release heat, therefore maintain the hot junction of temperature-difference thermoelectric electricity generation module in the more stable condition of high temperature, the effect of radiating fin makes the cold junction of temperature-difference thermoelectric electricity generation module maintain low-temperature condition.There is insulating material to prevent that the heat in temperature-difference thermoelectric electricity generation module hot junction from directly transmitting to surrounding environment in the surrounding of heat absorption type concave groove substrate; Shaped as frame gap between thermo-electric generation sheet monomer and thermo-electric generation sheet monomer, by using heat-insulating material to fill up, prevents that heat from directly flowing to cold junction from the hot junction of temperature-difference power generation module.Therefore solar energy phase transition energy storage type temperature difference electricity generation device provided by the invention has the integral structure that unique heat absorption, heat conduction combine with energy storage, has significantly improved the efficiency of solar energy phase transition energy storage type thermo-electric generation.
A kind of solar energy phase transition energy storage type temperature difference electricity generation device of the present invention compared with prior art has the following advantages:
A. in the groove of heat absorption type concave groove substrate of the present invention, load the mode that adopts phase-changing energy storage material to combine with the structural material of increased thermal conductivity energy, as: solid-solid phase transition material and conductive powder, nano TiO 2 microcapsule coated inorganic matter phase-change material, the compound of expanded graphite and barium hydroxide.Above concave groove, adopt heat-conducting plate to encapsulate by heat-conducting glue, heat-conducting plate skin is coated with heat-absorbing material.Heat absorption type concave groove substrate unique texture has good direct heat absorption and conductive force for solar energy irradiation, has improved generating efficiency.
B. in the time that the long-time high strength of sunlight is irradiated, phase-changing energy storage material absorption heat temperature rise, to phase transition point, store irradiation heat; In the time that the sun is blocked by cloud layer, phase-changing energy storage material heat absorption reduces, and temperature reduces, and there is contrary transition process, emit part heat, the hot-side temperature that therefore can maintain native system temperature-difference thermoelectric electricity generation module is substantially constant, has improved thermoelectric power generation conversion efficiency.In the present invention, disclose multiple phase-changing energy storage material, it absorbs heat, good heat conductivity, contributes to improve the generating efficiency of thermo-electric generation plate.The area large at solar energy irradiation intensity can adopt the phase-changing energy storage material that phase change transition temperature is high, and the area weak at solar energy irradiation can adopt the phase-changing energy storage material that phase change transition temperature is lower, applied widely.
C. Blast Furnace Top Gas Recovery Turbine Unit (TRT) of the present invention adopts phase-changing energy storage material, can overcome solar energy photovoltaic generator and cause the problem that temperature raises, power output reduces in summer owing to drawing badly.
D. the heat absorption type concave groove substrate that the present invention adopts is in conjunction with the novel structure of phase-changing energy storage material, its architectural feature is simple, is convenient to industrialized mass production, and function admirable, can improve the hot-side temperature stability of native system temperature-difference power generation module, improve thermoelectricity thermo-electric generation efficiency.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the illuminator work structuring figure of solar energy phase transition energy storage type thermo-electric generation;
Fig. 2 is the structural section figure of solar energy phase transition energy storage type thermo-electric generation plate in system;
Fig. 3 is the stereochemical structure installation diagram of solar energy phase transition energy storage type thermo-electric generation plate in system;
Fig. 4 is the structural section figure of heat absorption type concave groove substrate in system;
Fig. 5 is the three-dimensional structure diagram of temperature-difference thermoelectric generating monomer module in system.
Embodiment
Understand for technical characterictic of the present invention, object and effect being had more clearly, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
Embodiment 1
A kind of solar energy phase transition energy storage type temperature difference electricity generation device provided by the invention and illuminator, its system works structured flowchart as shown in Figure 1, comprise solar energy phase transition energy storage type thermo-electric generation plate (seeing Fig. 2, Fig. 3), solar lighting controller, storage battery and illuminating lamp.
Solar energy phase transition energy storage type thermo-electric generation plate comprises by heat absorption type concave groove substrate 3 (seeing Fig. 4), temperature-difference power generation module 5 and radiating fin 8.Heat absorption type concave groove substrate 3 adopts copper product, in the groove of heat absorption type concave groove substrate 3, fill phase-change material (PCM) for solid-solid phase transition material-conductive powder combination 4, solid-solid phase transition material adopts aminomethyl propylene glycol [AMPD]-(D) 2-camphanone [DC] combination; Conductive powder adopts nanotube; Concave groove top adopts copper coin 2 as heat-conducting plate, copper coin 2 adopts heat-conducting glue 7 packaging phase change materials 4 with the recessed end of heat absorption type concave groove substrate 3, be coated with heat-absorbing material 1 in conducting copper plate 2 outsides, directly and heat absorption type concave groove substrate 3 below close contacts, the cold junction of temperature-difference thermoelectric electricity generation module 5 contacts with radiating fin 8 with heat-conducting glue 7 by conducting copper plate for the hot junction of temperature-difference thermoelectric electricity generation module 5.
Temperature-difference thermoelectric electricity generation module 5 (seeing Fig. 5) is connected by some or/and thermo-electric generation sheet monomer composition in parallel, temperature-difference power generation module is taking generating sheet as matrix, 1-9 piece generating sheet is linked to composition electricity generation module by series and parallel, wherein the frame groove part gap between thermo-electric generation sheet monomer and thermo-electric generation sheet monomer is filled up by heat-insulating material extra-fine glass-wool felt 9, prevent that heat from directly flowing to cold junction from the hot junction of electricity generation module 5, adopt heat-insulating material extra-fine glass-wool felt 9 in the peripheral surrounding of heat absorption type concave groove substrate 3.
Solar energy phase transition energy storage type thermo-electric generation plate forms and connects with solar lighting controller, storage battery and illuminating lamp, and storage battery adopts lead acid accumulator, and illuminating lamp adopts LED lamp, forms a kind of illuminator of solar energy phase transition energy storage type thermo-electric generation.By solar energy irradiation, the heat on heat absorption type concave groove substrate is converted into electric energy to solar energy phase transition energy storage type thermo-electric generation plate, by solar lighting controller control accumulator cell charging and discharging in system; Solar lighting controller has over-charge protective, Cross prevention, short-circuit protection function; There is the control function of illuminating lamp, automatically cut control illuminating lamp loading functional as adopted at light-operated, time control, night.
Its course of work is as follows:
Solar energy impinges, on heat-absorbing paint 1, is given heat absorption type concave groove copper base 3 and phase-changing energy storage material 4 by copper heat-conducting plate 2 by the conduction of absorption sunlight heat; Raise when phase-changing energy storage material 4 constantly absorbs heat and temperature, while reaching phase transition temperature, phase-changing energy storage material 4 sends and changes mutually and store heat; In the time that irradiation is insufficient, phase-changing energy storage material 4 temperature reduce, and during lower than phase transition temperature, emit heat, and the hot junction that substantially maintains temperature-difference thermoelectric electricity generation module 5 are in stablizing the condition of high temperature.Due to the effect of radiating fin 8, make the cold junction of temperature-difference thermoelectric electricity generation module 5 maintain low-temperature condition, have heat-insulating material extra-fine glass-wool felt 9 to prevent the directly environment transmission towards periphery of heat in temperature-difference thermoelectric electricity generation module 5 hot junctions in the surrounding of heat absorption type concave groove substrate 3, therefore temperature-difference thermoelectric generating conversion efficiency is higher.The solar energy phase transition energy storage type thermo-electric generation plate of native system is by being electric energy by the thermal power transfer of sunlight irradiation, and discharging and recharging by solar lighting controller regulation and control lead acid accumulator.Thermoelectric cell generating when native system can fully ensure daytime sunlight acute irradiation, charge in batteries, when daylight is sufficient, LED lamp is not luminous daytime, controls storage battery night and powers to LED illuminating lamp.
Embodiment 2
A kind of solar energy phase transition energy storage type temperature difference electricity generation device and illuminator that the present embodiment Application Example 1 provides, different just heat absorption type concave groove substrates 3 adopt ceramic material; In the groove of heat absorption type concave groove ceramic substrate, loading phase-change material (PCM) is nano TiO
2microcapsule coated inorganic matter phase-change material mixture M g (NO
3)
36H
2o/Al (NO
3)
39H
2o; Heat-conducting plate 2 adopts ceramic wafer material; Heat-insulating material 9 adopts expanded perlite; Storage battery adopts lithium ion (Liion) storage battery; Illuminating lamp adopts DC energy-saving lamp.The course of work of embodiment 2 is identical with embodiment 1.
Embodiment 3
A kind of solar energy phase transition energy storage type temperature difference electricity generation device and illuminator that the present embodiment Application Example 1 provides, different just heat absorption type concave groove substrates 3 adopt Cu alloy material; In the groove of heat absorption type concave groove copper alloy substrate 3, load the compound of phase-change material (PCM) for expanded graphite and barium hydroxide; Heat-conducting plate 2 adopts graphite cake material; Insulating material 9 adopts mineral wool material; Storage battery adopts NI-G (NiCd) storage battery; Illuminating lamp adopts low-pressure sodium lamp.The course of work of this example 3 is identical with example 1.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not departing from the scope situation that aim of the present invention and claim protect, also can make a lot of forms, within these all belong to protection of the present invention.
Claims (10)
1. a solar energy phase transition energy storage type temperature difference electricity generation device, it is characterized in that, comprise solar energy phase transition energy storage type thermo-electric generation plate, described solar energy phase transition energy storage type thermo-electric generation plate comprises heat absorption type concave groove substrate, temperature-difference thermoelectric electricity generation module and radiating fin, in the groove of described heat absorption type concave groove substrate, be filled with phase-changing energy storage material, described heat absorption type concave groove substrate top is provided with heat-conducting plate, and described heat-conducting plate encapsulates by heat-conducting glue, and the skin of described heat-conducting plate is coated with heat-absorbing material; The temperature end close contact of the hot junction of described temperature-difference thermoelectric electricity generation module and heat absorption type concave groove substrate, the cold junction of temperature-difference thermoelectric electricity generation module is connected with radiating fin with heat-conducting glue by heat-conducting plate.
2. solar energy phase transition energy storage type temperature difference electricity generation device according to claim 1, it is characterized in that, described phase-changing energy storage material comprises solid-solid phase transition material and conductive powder, and described solid-solid phase transition material is aminomethyl propylene glycol, (D) 2-camphanone, aminomethyl propylene glycol and the combination of (D) combination, (D) 2-camphanone and the succinonitrile of combination, pentaerythrite and the DOPCP of 2-camphanone or (D) combination of 2-camphanone and DOPCP; Described conductive powder is CNT (carbon nano-tube), graphite powder, copper powder or ceramic powder.
3. solar energy phase transition energy storage type temperature difference electricity generation device according to claim 1, is characterized in that, described phase-changing energy storage material is nano-TiO
2microcapsule coated inorganic matter phase-change material, described inorganic matter phase-change material is: Mg (NO
3)
36H
2o/MgCl
2, Mg (NO
3)
36H
2o/Al (NO
3)
39H
2o, Mg (NO
3)
36H
2o/NH
4nO
3, Mg (NO
3)
36H
2o/LiNO
3, LiNO
3/ NH
4nO
3/ KNO
3, Ca (NO
3)
2/ LiNO
3/ KNO
3, Na
2p
2o
410H
2o or NH
4al (SO
4)
26H
2o.
4. solar energy phase transition energy storage type temperature difference electricity generation device according to claim 1, is characterized in that, described phase-changing energy storage material is the compound of expanded graphite and barium hydroxide, or the compound of expanded graphite and paraffin.
5. solar energy phase transition energy storage type temperature difference electricity generation device according to claim 1, is characterized in that, described heat absorption type concave groove substrate is made up of copper, copper alloy, aluminium alloy or pottery.
6. solar energy phase transition energy storage type temperature difference electricity generation device according to claim 1, it is characterized in that, described temperature-difference thermoelectric electricity generation module comprises some series connection or/and thermo-electric generation sheet monomer in parallel, and the shaped as frame gap between described thermo-electric generation sheet monomer and thermo-electric generation sheet monomer is filled up by use heat-insulating material.
7. solar energy phase transition energy storage type temperature difference electricity generation device according to claim 6, is characterized in that, described heat-insulating material is blanket of glass wool, mineral wool, expanded perlite, diatomite or rock wool glass cloth seam plate.
8. the illuminator of a solar energy phase transition energy storage type thermo-electric generation, it is characterized in that, comprise the Blast Furnace Top Gas Recovery Turbine Unit (TRT) in claim 1-7 any one, also comprise solar lighting controller, storage battery and illuminating lamp, described solar lighting controller is connected with solar energy phase transition energy storage type thermo-electric generation plate, and described storage battery is connected with solar lighting controller respectively with illuminating lamp.
9. illuminator according to claim 8, is characterized in that, described storage battery is lead acid accumulator, nickel chromium triangle storage battery, nickel-hydrogen accumulator or lithium-ions battery.
10. illuminator according to claim 8, is characterized in that, described illuminating lamp is LED lamp, electricity-saving lamp, low-pressure sodium lamp, high-pressure sodium lamp or electrodeless electromagnetic sense light.
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