CN203068820U - Heat absorption cavity based on three-phase flow of solid, liquid and gas - Google Patents

Heat absorption cavity based on three-phase flow of solid, liquid and gas Download PDF

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Publication number
CN203068820U
CN203068820U CN2012205855021U CN201220585502U CN203068820U CN 203068820 U CN203068820 U CN 203068820U CN 2012205855021 U CN2012205855021 U CN 2012205855021U CN 201220585502 U CN201220585502 U CN 201220585502U CN 203068820 U CN203068820 U CN 203068820U
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China
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heat
phase
liquid
absorbing chamber
solid
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Expired - Lifetime
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CN2012205855021U
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Chinese (zh)
Inventor
肖刚
倪明江
骆仲泱
高翔
岑可法
方梦祥
周劲松
施正伦
程乐鸣
王勤辉
王树荣
余春江
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Zhejiang University ZJU
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Zhejiang University ZJU
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y02E10/44—Heat exchange systems

Abstract

The utility model discloses a heat absorption cavity based on three-phase flow of solid, liquid and gas. The heat absorption cavity based on the three-phase flow of the solid, the liquid and the gas comprises a glass cover plate, an external exchanger, an internal exchanger, a structural hollow cavity, a partition plate, an air pump, small granules, liquid phase working media and a three-phase flow heat absorption cavity, wherein the air pump is connected with the three-phase flow heat absorption cavity, the three-phase flow heat absorption cavity comprises the glass cover plate, the structural hollow cavity, the partition plate, the small granules and the liquid phase working media, the partition plate is arranged on the lower portion inside the three-phase flow heat absorption cavity, mixed working media of the small granules and the liquid phase working media are filled in the interior of the three-phase flow heat absorption cavity, and the internal exchanger and the structural hollow cavity are immersed in the mixed working media. The advantages of the three-phase flow of the solid, the liquid and the gas in heat absorption are integrated into the heat absorption cavity based on the three-phase flow of the solid, enhancement of gas phase is utilized to disturb and enhance heat convection and to achieve homodisperse of solid-phase granules in liquid-phase base solution, abilities of heat conduction and radiation absorption of solid phase are strong, liquid phase has the advantages of being large in specific heat capacity and the like, so that the capacity of heat absorption is enhanced, a body-absorption structure is utilized to reduce heat resistance, reduce heat loss and improve heat efficiency, and the heat absorption cavity based on the three-phase flow of the solid, the liquid and the gas provides support for solar high-efficient utilization and energy transformation.

Description

Heat-absorbing chamber based on the solid-liquid gas three-phase flow
Technical field
The utility model relates to solar energy heat utilization field, relates in particular to a kind of heat-absorbing chamber based on the solid-liquid gas three-phase flow.
Background technology
Solar energy receives much concern as a kind of regenerative resource of cleaning, global solar radiation amount about 1.7 * 10 17W, wherein China accounts for 1%(1.8 * 10 15W is equivalent to 1.9 trillion tons of mark coal/years).Solar thermal collector can be heat energy with conversion of solar energy, and traditional heat collector adopts the mode of secondary heat exchange to transmit heat, by absorber plate or the heat absorption earlier of vacuum tube wall, with flow working mediums such as heat transferred water, is single-phase heat absorption then, and the collecting efficiency of heat collector is low.A kind of novel collecting apparatus during three-phase stream heat-absorbing chamber utilizes as solar energy belongs to bulk absorption formula heat collector.In the bulk absorption formula heat collector, sunshine is directly absorbed by the liquid phase working fluid in the heat-absorbing chamber and solid phase particles, and air feeds and causes disturbance, augmentation of heat transfer heat accumulation, thereby the absorption that improves solar energy, and liquidus temperature rises to 200～550 ℃.When air passes through liquid phase working fluid, take away the part heat from organic working medium, realize the temperature rise of air, the air after the heating can be used on a heat exchange pre-heating heat-exchanging of external heat exchanger working medium.Working medium is carried out secondary heat exchange with the internal exchanger that is immersed in the three-phase stream heat-absorbing chamber after the preheating, the gained heat can be applicable to preheated burning system, high-temperature baking, solar refrigeration, organic Rankine recirculation heater, Stirling engine thermal source, realizes purposes such as generating.
Summary of the invention
The utility model purpose is to overcome the deficiency in the existing solar thermal utilization, solves the problem that thermal loss is big, utilization ratio is low in the solar energy utilization, and a kind of heat-absorbing chamber based on the solid-liquid gas three-phase flow is provided.
Comprise two air pumps, two external heat exchanger, two internal exchangers and three-phase stream heat-absorbing chamber based on the heat-absorbing chamber of solid-liquid gas three-phase flow; Three-phase stream heat-absorbing chamber comprises the cavate glass cover-plate, annular housing, dividing plate, granule, liquid phase working fluid, the outlet of one air pump links to each other with three-phase stream heat-absorbing chamber bottom centre, one air pump entrance links to each other with three-phase stream heat-absorbing chamber top through an external heat exchanger, one external heat exchanger heat exchange coil links to each other with an internal exchanger heat exchange coil, another air pump outlet links to each other with three-phase stream heat-absorbing chamber bottom centre, another air pump entrance links to each other with three-phase stream heat-absorbing chamber top through another external heat exchanger, another external heat exchanger heat exchange coil links to each other with another internal exchanger heat exchange coil, three-phase stream heat-absorbing chamber bottom centre is provided with dividing plate, three-phase stream heat-absorbing chamber lower central is provided with annular housing, the annular housing top is provided with the cavate glass cover-plate, cavate glass cover-plate upper end links to each other with three-phase stream heat-absorbing chamber top shell, three-phase stream heat-absorbing chamber inside is filled with the mixed working fluid of granule and liquid phase working fluid, and internal exchanger is immersed in the mixed working fluid.
Heat-absorbing chamber based on the solid-liquid gas three-phase flow is characterized in that the granule in the described three-phase stream heat-absorbing chamber in the mixed working fluid can be nanometer or micron particles, and volumetric concentration is 0.1 ~ 3%.
Compared with prior art, the utlity model has following advantage:
1) this three-phase stream heat-absorbing chamber belongs in the direct absorption heat collector of solar energy, the interpolation of micron order or nano-scale particle has improved the radiation absorption characteristics of fluid, working fluid directly absorbs solar energy, rather than the secondary heat exchange of traditional heat collector, this has reduced the thermal resistance in the diabatic process, be conducive to reduce heat loss, improve the thermal efficiency.
2) utilize liquid phase can realize the direct absorption of solar energy, improved the medium heat storage capacity, energy output is relatively stable when realizing the high temperature use.
3) in liquid phase medium, add solid particle, improved the heat transfer property of cycle fluid significantly, thereby improve the thermal efficiency of heat-absorbing chamber.
4) by the form of gas phase air by suspension, introduce disturbance, strengthened the liquid phase heat convection, the surface absorption of solar energy is converted into the bulk absorption of heat-absorbing chamber by static heat transfer medium, significantly improved the heat absorption capacity of heat-absorbing chamber, prevented the precipitation of solid phase particles simultaneously, made solid phase obvious to the solar radiation assimilation effect, final liquid phase medium temperature rises to higher value, realizes the absorption of more substantial solar energy.
5) layout that gentle pump intake position is set of structural cavities can effectively realize the circulation between cold and hot working medium, hot working fluid since the air-flow effect to two side flow, enter after the big liquid bath scope in both sides because disturbance weakens the downward sedimentation of particle; Cold working medium is carried particle to center flow because overhead negative pressure is spontaneous by lower flow passage, has finished the working medium circulation of main hot collecting zone, has avoided the use of high temperature liquid pump.
6) since in the Salar light-gathering heat utilization system behind the optically focused the even heat collector core that causes of light spot energy density unevenness receive higher, the heat collector central temperature problem of higher of energy-flux density, can access effective improvement by gas phase disturbance and dividing plate with holes to the guide of flow of liquid phase working fluid.
Description of drawings
Fig. 1 is the heat-absorbing chamber general structure schematic diagram based on the solid-liquid gas three-phase flow;
Among the figure, cavate glass cover-plate 1, external heat exchanger 2, internal exchanger 3, annular housing 4, dividing plate 5, air pump 6, granule 7, three-phase stream heat-absorbing chamber 8, liquid phase working fluid 9, light path 10.
The specific embodiment
As shown in Figure 1, comprise two air pumps 6, two external heat exchanger 2, two internal exchangers 3 and three-phase stream heat-absorbing chamber 8 based on the heat-absorbing chamber of solid-liquid gas three-phase flow; Three-phase stream heat-absorbing chamber 8 comprises cavate glass cover-plate 1, annular housing 4, dividing plate 5, granule 7, liquid phase working fluid 9,6 outlets of one air pump link to each other with three-phase stream heat-absorbing chamber 8 bottom centre, one air pump, 6 entrances link to each other with three-phase stream heat-absorbing chamber 8 tops through an external heat exchanger 2, one external heat exchanger, 2 heat exchange coils link to each other with an internal exchanger 3 heat exchange coils, another air pump 6 outlets link to each other with three-phase stream heat-absorbing chamber 8 bottom centre, another air pump 6 entrances link to each other with three-phase stream heat-absorbing chamber 8 tops through another external heat exchanger 2, another external heat exchanger 2 heat exchange coils link to each other with another internal exchanger 3 heat exchange coils, three-phase stream heat-absorbing chamber 8 bottom centre are provided with dividing plate 5, three-phase stream heat-absorbing chamber 8 lower central are provided with annular housing 4, annular housing 4 tops are provided with cavate glass cover-plate 1, cavate glass cover-plate 1 upper end links to each other with three-phase stream heat-absorbing chamber 8 top shells, three-phase stream heat-absorbing chamber 8 inside are filled with the mixed working fluid of granule 7 and liquid phase working fluid 9, and internal exchanger 3 is immersed in the mixed working fluid.
Granule 6 in the described three-phase stream heat-absorbing chamber 8 in the mixed working fluid can be nanometer or micron particles, and volumetric concentration is 0.1 ~ 3%.
Heat absorption method based on the solid-liquid gas three-phase flow is: when three-phase stream heat-absorbing chamber 8 is worked under solar radiation, one air pump 6 provides air circulation power, cold air enters three-phase stream heat-absorbing chamber 8 by three-phase stream heat-absorbing chamber 8 bottom centre, the mixed working fluid of liquid phase working fluid 9 and granule 7 absorbs solar radiation in the three-phase stream heat-absorbing chamber 8, temperature rises to 200～550 ℃, under the disturbance of air via the interlayer of 1 of the annular housing 4 of three-phase stream heat-absorbing chamber 8 lower central and cavate glass cover-plate to two side flow, the air that air pump 6 feeds causes disturbance, improved the heat exchange between granule 7 and the liquid phase working fluid 9, strengthen the mixing of liquid phase working fluid liquid layer about in the of 9, strengthen the heat convection in the liquid phase working fluid 9, make the mixed working fluid of liquid phase working fluid 9 in the three-phase stream heat-absorbing chamber 8 and granule 7 realize the bulk absorption to solar energy, flow to hot mixed working fluid the reducing because of air agitation of both sides, granule 7 slow sedimentations, the mixed working fluid of liquid phase working fluid 9 and granule 7 is back to three-phase stream heat-absorbing chamber 8 bottom centre via the interlayer between annular housing 4 bottoms and three-phase stream heat-absorbing chamber 8 cavitys.The mixed working fluid of the liquid phase working fluid 9 in the three-phase stream heat-absorbing chamber 8 both sides cavitys and transmission or the utilization that an internal exchanger 3 heat exchange realize heat; When the air that one air pump 6 feeds passes through the liquid-solid phase suspension of granule 7 and liquid phase working fluid 9, take away suspension part heat, air produces certain temperature rise, a heat exchange is carried out in 2 heat exchange through an external heat exchanger, and condensation reclaims a small amount of gaseous state liquid phase working fluid 9 that air is taken out of, and another air pump 6 closed circuit method of works are the same.
The utility model is to utilize the characteristic of solid-liquid gas three-phase aspect the heat absorption heat transfer, design three-phase stream heat-absorbing chamber, and purpose is to improve the efficient in the solar heat conversion process, improves solar energy utilization ratio.This three-phase stream heat-absorbing chamber belongs to the direct absorption heat collector of solar energy, and working fluid directly absorbs solar energy, rather than the secondary heat exchange of traditional heat collector, and this has reduced the thermal resistance in the diabatic process, is conducive to reduce heat loss, improves the thermal efficiency.
Solid phase is micron or nano-scale particle in the heat-absorbing chamber, utilizes the solid particle characteristic strong to the solar radiative absorption ability, strengthens heat-absorbing chamber to the absorption of solar energy; The air of gas phase for continuing to pass through from the porch in the heat-absorbing chamber, disturbance is introduced in the feeding of air, strengthen the convection current heat-transmission and make it reduce thermal resistance with the bulk absorption form, avoid solids precipitation simultaneously, and realize that by the power that air provides the circulation of cold and hot mixed working fluid avoided the use of high temperature liquid pump.
The solid phase granule 7 that uses in the utility model is the black SiC particle of 120 μ m specifications as particle diameter, liquid phase working fluid 9 is high temperature resistant 320 conduction oils of Si Kalan, flow the 2.025kg conduction oil of packing in the heat-absorbing chamber 8 at three-phase, add the 0.265kgSiC particle in the conduction oil, air is with 6.0m 3The flow of/h feeds three-phase stream heat-absorbing chamber 8 by air pump 6.
Liquid phase working fluid 9 can adopt three component fused salts in the utility model three-phase stream heat-absorbing chamber 8, key component potassium nitrate in the fused salt, and natrium nitrosum, sodium nitrate account for 53%, 40%, 7% respectively, add the Al of 75nm specification in the fused salt 2O 3As solid phase granule 7, by air pump 6 bubbling airs, form three-phase stream heat-absorbing chamber with this.
Solid phase granule 7 also can be nano-scale particle in the utility model three-phase stream heat-absorbing chamber 8, adds the CuO particle of 100nm specification as the solid phase granule, and Mobiltherm 605 conduction oils are as liquid phase working fluid 9.Bubbling air in the three-phase stream heat-absorbing chamber 8 forms heat-absorbing chamber based on the solid-liquid gas three-phase flow with this.It directly absorbs solar energy, utilizes three-phase stream advantage, improves the radiation absorbability to solar energy, and the heat of high temperature of acquisition realizes purposes such as generating as the Stirling engine thermal source.

Claims (1)

1. the heat-absorbing chamber based on the solid-liquid gas three-phase flow is characterized in that comprising two air pumps (6), two external heat exchanger (2), two internal exchangers (3) and three-phase stream heat-absorbing chamber (8); Three-phase stream heat-absorbing chamber (8) comprises cavate glass cover-plate (1), annular housing (4), dividing plate (5), one air pump (6) outlet links to each other with three-phase stream heat-absorbing chamber (8) bottom centre, one air pump (6) entrance links to each other with three-phase stream heat-absorbing chamber (8) top through an external heat exchanger (2), one external heat exchanger (2) heat exchange coil links to each other with an internal exchanger (3) heat exchange coil, another air pump (6) outlet links to each other with three-phase stream heat-absorbing chamber (8) bottom centre, another air pump (6) entrance links to each other with three-phase stream heat-absorbing chamber (8) top through another external heat exchanger (2), another external heat exchanger (2) heat exchange coil links to each other with another internal exchanger (3) heat exchange coil, three-phase stream heat-absorbing chamber (8) bottom centre is provided with dividing plate (5), three-phase stream heat-absorbing chamber (8) lower central is provided with annular housing (4), annular housing (4) top is provided with cavate glass cover-plate (1), cavate glass cover-plate (1) upper end links to each other with three-phase stream heat-absorbing chamber (8) top shell, is provided with internal exchanger (3) in the three-phase stream heat-absorbing chamber (8).
CN2012205855021U 2012-11-08 2012-11-08 Heat absorption cavity based on three-phase flow of solid, liquid and gas Expired - Lifetime CN203068820U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103512236A (en) * 2012-06-15 2014-01-15 新茂野科技股份有限公司 Heat collecting container of solar photo-thermal device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103512236A (en) * 2012-06-15 2014-01-15 新茂野科技股份有限公司 Heat collecting container of solar photo-thermal device

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Granted publication date: 20130717