CN102338476A - Solar heat transfer unit - Google Patents
Solar heat transfer unit Download PDFInfo
- Publication number
- CN102338476A CN102338476A CN2010102388174A CN201010238817A CN102338476A CN 102338476 A CN102338476 A CN 102338476A CN 2010102388174 A CN2010102388174 A CN 2010102388174A CN 201010238817 A CN201010238817 A CN 201010238817A CN 102338476 A CN102338476 A CN 102338476A
- Authority
- CN
- China
- Prior art keywords
- heat
- solar energy
- heat transfer
- transfer medium
- spherical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
Abstract
The invention discloses a solar heat transfer unit (1). The solar heat transfer unit (1) comprises a heat-absorbing area (2), a heat-releasing area (4), a fixed-shape heat-transfer medium and a driving device (11), wherein the interiors of the heat-absorbing area (2) and the heat-releasing area (4) are provided with inner-layer metal tubes, and the fixed-shape heat-transfer medium penetrates through the inner-layer metal tubes; the heat-absorbing area (2) is arranged at the position capable of receiving solar energy rays, a coating with high absorption rate and low emittance is coated on the external surface of the part of the heat-absorbing area by the inner-layer metal tube; and the driving device (11) can drive the fixed-shape heat-transfer medium to run in the solar heat transfer unit (1). The invention has the following advantages: the unit can be subjected to mass production and installation in a large size; a sphere metal or sphere ceramic (5) of the fixed-shape heat-transfer medium has high coefficient of heat conductivity, thus the heat transfer efficiency is high, no leak danger exists and an environmentally-friendly goal can be realized; the unit has the ultra-high temperature heat-transfer capacity; the unit has low cost, stable performance and long service life and is easy to manufacture.
Description
Technical field
The present invention relates to a kind of heat transfer unit (HTU), particularly be used for the solar energy heat-transferring device of solar energy collecting equipment.
Background technology
Solar energy is as the energy of a kind of cleaning, environmental protection, and people are devoted to the development and utilization to it always for a long time.Particularly in recent years, because oil price constantly soaring and to the raising of environmental protection requirement, and the anthropogenic carbon dioxide emissions quantitative limitation, various countries have carried out the research that solar energy utilizes the aspect harder.Domestic solar thermal utilization is done a lot, the resident is very ripe with the solar water heater technology, but water heater belongs to low-temperature solar energy heat utilization category; Present domestic few studies person has begun the research to the solar energy high temperature heat utilization, uses solar energy to obtain high-temperature steam, carries out the research of solar light-heat power-generation, and the temperature of gained heat transfer medium is high more, and hot machine just has more high efficiency; The huge solar heat that how recipient is received spreads out of outside the system, becomes the emphasis of technology.
Use the needed vapor (steam) temperature of solar electrical energy generation to reach 500 ℃～600 ℃, this has very big differently with in the past heat transfer, and heat transfer medium has been proposed higher challenge; Common conduction oil surpasses 400 ℃ and has just surpassed its temperature operating limit; Use the direct heat conduction of steam, receive the restriction of its pressure, and need a large amount of steam, to the very high requirement of security and stability proposition of system through absorption tube; Use sodium metal or fuse salt as transmitting medium, it has the good heat transfer performance, but its security is difficult to assurance, and has expensive price, makes system cost higher, and practical operation is not easy especially very much; And all there is the problem of operation stability simultaneously in the mode of some heat transfers of more than mentioning, heat accumulation innage temperature ignition, steam corrosion, some destabilizing factors of high-temperature sodium leakage or the like.
Summary of the invention
In order to solve the above-mentioned shortcoming of prior art, the object of the present invention is to provide a kind of heat transfer unit (HTU), its characteristics are efficient, with low cost for conducting heat, the performance safety and stability, the life-span is long, and is pollution-free.
To achieve these goals, the present invention provides a kind of solar energy heat-transferring device.This solar energy heat-transferring device comprises heat affected zone, heat release zone, fixed profile heat transfer medium and drive unit; Wherein, in said heat affected zone, heat release zone, be provided with the inner layer metal pipe, said fixed profile heat transfer medium is in said inner layer metal pipe; Said heat affected zone is positioned at solar light and accepts the position, and said inner layer metal pipe scribbles the coating of high-absorbility low-launch-rate at the outer surface of the part of heat affected zone; The said fixed profile heat transfer medium of said drive mechanism moves in the solar energy heat-transferring device.
In one embodiment, said heat affected zone is positioned on the long focal line of solar energy parabolic reflection groove or Fresnel reflection lens array.
In one embodiment, said heat affected zone comprises outer layer glass tube, and it is linear that the linear part of inner layer metal pipe in the heat affected zone is, and outer surface scribbles the coating of high-absorbility low-launch-rate, to strengthen the absorption of solar heat, reduces the loss of heat radiation.
Preferably, the solar energy heat-transferring device comprises and turns to the district that said inner layer metal pipe is through turning in the district.
The said district that turns to is positioned between said heat affected zone and the heat release zone.
Preferably, the said inner layer metal pipe that turns to the district to comprise outer bellows of arc and arc is a heat-insulation layer between the inner layer metal pipe of outer bellows of arc and arc.
Preferably, the space of said inner layer metal pipe and outer layer glass tube formation is in vacuum state.
Preferably, the inner space of said inner layer metal pipe is in air-tight state, is atmosphere gas or gas-pressurized in the confined space.
Preferably, the gas of filling in the inner space of said inner layer metal pipe is non-oxide, high heat transfer gas, such as inert gas or pressurized inert gas.
Preferably, said inert gas or pressurized inert gas are helium or pressurized helium, nitrogen or pressurized nitrogen, and hydrogen or pressurized hydrogen are to improve the high-temperature oxydation damage of heat convection condition and minimizing fixed profile heat transfer medium.
Preferably; Said inner layer metal pipe has high emissivity pattern or cover layer and combination thereof at the inner surface of the part of heat affected zone; The oxide coating of inner layer metal pipe internal surface for example; Or rough surface and repeating heats pattern or the rough surface that the cooling back obtains and covers one deck high emissivity layer, to strengthen said inner layer metal pipe to fixed profile heat transfer medium radiations heat energy.
In one embodiment, said heat release zone turns between district and the heat affected zone said, and it is outside to be converted to the solar energy heat-transferring device in order to the heat that the fixed profile heat transfer medium is accepted, for example solar energy heat-storage device or heat utilization device.
Preferably, described fixed profile heat transfer medium is advanced for rolling in the inner layer metal pipe, drives required power consumption and wearing and tearing to reduce.
Each monomer of described fixed profile heat transfer medium is preferably orbicule or the cylinder that trough of belt etc. has high surface area.
In examples of implementation, said orbicule or cylinder are formed by stacking the similar and different disk combination of materials of some diameters.
Described fixed profile heat transfer medium material is preferably a kind of in metal or graphite or metal alloy or the pottery, also or the combination of their variety classes.
Described solid profile heat transfer medium is preferably spherical metal.
Described solid profile heat transfer medium is preferably spherical pottery.
Preferably, central hole is processed in the inside of said spherical metal or spherical pottery and its outside is made for multi-groove structure, is beneficial to single spherical metal or spherical pottery and accepts more heat in the heat affected zone and discharge more heat in heat release zone.
Preferably, the grooved of the groove structure of said spherical metal or spherical pottery is the convex structure, with volume and the surface area that increases single steel ball body, and is beneficial to radiation and convection current.
Preferably; The outer surface of said fixed profile heat transfer medium has high absorb high emissivity pattern or cover layer or coating and combination thereof; The for example oxide coating on the surface of fixed profile heat transfer medium, or rough surface and repeating heats the pattern that the cooling back obtains, and arc differential oxide ceramic coating or rough surface cover one deck high emissivity layer; To increase the absorbability of steel ball, in the thermal radiation capability of heat release zone in the heat affected zone.
Preferably; Said inner layer metal pipe scribbles the high-absorbility coating at the part inner surface of heat release zone; The outer surface of part has high emissivity pattern or cover layer and combination thereof; The for example oxide coating of inner layer metal pipe internal surface, or rough surface and repeating heats pattern or the rough surface that the cooling back obtains and covers one deck high emissivity layer; With the absorbability of the heat of the inwall that increases heat release zone inner layer metal pipe and the heat releasability of outer wall, overall enhanced exothermal efficiency.
Described fixed profile heat transfer medium is preferably the hollow spherical metal or spherical pottery inside is the confined space of hollow; Be furnished with in it and have low melting point and the high filler of volumetric specific heat capacity, for example metal material tin, sodium, potassium, zinc and alloy etc. in 250～550 ℃ of scopes; Or inorganic salts and mixture such as nitrate or carbonate etc.
Preferably, surface treatments such as said hollow confined space inwall sprays, vacuum coating improve the corrosion protection ability.
Preferably, interconnect through chain structure between said spherical metal or the spherical pottery, be arranged in said inner layer metal pipe and the heat release zone space, in whole solar energy heat-transferring device.
In one embodiment, said drive arrangement in the fixed profile heat transfer medium the ad-hoc location of process, advance in order to the rolling of drive fixing profile heat transfer medium in the inner layer metal pipe.
The more existing solar energy heat-transferring device of the present invention has following advantage:
1, the material thermal conductivity factor as the fixed profile heat transfer medium is high, and heat transfer efficiency is high, system's normal pressure operation, and it is dangerous not have leakage, environmentally friendly;
2, the fixed profile heat transfer medium has the ability of strong high temperature conduction heat;
3, the driving of fixed profile heat transfer medium is simple;
4, the processing of heat transfer unit (HTU) is low-cost, and is prone to processing;
5, the performance safety and stability of heat transfer unit (HTU), the life-span is long;
6, comprise that the solar energy heat-transferring device of fixed profile heat transfer medium, outer layer glass tube, outer bellows and inner layer metal pipe can large-scale production, large scale is installed;
7, for total system, can accept large-area sunshine, accomplish the transmission and the utilization of lot of energy, system can large-scale production, utilization on a large scale.
Description of drawings
The application's sketch map be only used for explaining the applicant the solar energy heat-transferring device thought rather than be used to limit the application's application content.Those of ordinary skill in the art should be readily appreciated that the application's content at the accompanying drawing that combines the application and after having read the application's specification, in the accompanying drawing:
Fig. 1 a is the overall schematic of parabolic slot type of the heat transfer unit (HTU) of the embodiment of the invention;
Fig. 1 b is the overall schematic of Fresnel array of the heat transfer unit (HTU) of the embodiment of the invention;
Fig. 2 is the sketch map of heat affected zone of the heat transfer unit (HTU) of the embodiment of the invention;
Fig. 3 is the sketch map that turns to the district of the heat transfer unit (HTU) of the embodiment of the invention;
Fig. 4 a is the spherical metal of the embodiment of the invention or the sketch map of spherical pottery;
Fig. 4 b is the spherical metal of the embodiment of the invention or the sketch map that spherical pottery has multiple-grooved;
Fig. 4 c is the spherical metal of the embodiment of the invention or the sketch map that spherical pottery has many concave slots;
Fig. 4 d is the spherical metal of the embodiment of the invention or the sketch map that spherical pottery is made up of the multi-disc disk;
Fig. 5 a arranges the sketch map with the high filler of phase transformation and volume specific heat in spherical metal or the inner confined space of spherical pottery of the embodiment of the invention;
Fig. 5 b is that spherical metal or the spherical pottery of the embodiment of the invention has the sketch map that the structure stack of filler is formed by a plurality of inside; And
Fig. 6 is the application of solar energy tower type concentrating to generate power of the heat transfer unit (HTU) of the embodiment of the invention.
The specific embodiment
Fig. 1 a and Fig. 1 b are the schematic layout pattern according to the solar energy heat-transferring device 1 of the embodiment of the invention.Heat transfer unit (HTU) 1 comprises heat affected zone 2, turns to district 3, heat release zone 4, and wherein 2 corresponding positions, heat affected zone are respectively the long focal line position of solar energy parabolic reflection groove or Fresnel reflection lens array.The sunshine that this heat affected zone 2 receives from mirror reflects.Solar energy heat-transferring device 1 integral body is structure ringwise, and wherein heat affected zone 2 is long linear pattern, and its length for example is at least 10 meters.
Fig. 2 is the sketch map of the heat affected zone 2 in the heat transfer unit (HTU) 1.Heat affected zone 2 receives the long focal line position that is positioned at the solar energy reflection groove, receives the energy from the sun, and it is linear that its integral body is.This heat affected zone 2 comprises outer layer glass tube 6 and linear inner layer metal pipe 7.In an example, the space between the inner layer metal pipe 7 of outer layer glass tube 6 and linearity preferably is in vacuum state.The outer surface of linear inner layer metal pipe 7 scribbles the coating of the high-absorbility low-launch-rate that absorbs solar energy; The sunray of assembling is after seeing through outer layer glass tube 6; Absorbed by the low reflectance coating of the high absorption of the outer surface of the inner layer metal pipe 7 of linearity; Spherical metal in the inner layer metal pipe or spherical ceramic 5 receives the heat and the radiation of high temperature thereof of the convection current of contact conduction from the inner layer metal pipe 7 of linearity, gas, and temperature raises.Spherical metal that in heat affected zone 2, has been heated or spherical pottery swap out energy through heat release zone 4 to turning to district's 3 operations, get into next heat affected zone 2 then, and the spherical metal or spherical ceramic 5 of cooling is heated once more, so accomplish the transmission of energy.
Fig. 2 also shown spherical metal or spherical ceramic 5 in the heat affected zone 2 inside motion state in a flash; Spherical metal or spherical ceramic 5 and spherical metal or spherical ceramic 5 between certain spacing is arranged; Spherical metal or spherical ceramic 5 with jockey connects is done identical motion in the inner layer metal pipe 7 of linearity; Spherical metal or spherical ceramic 5 and linear inner layer metal pipe 7 between have rolling friction, spherical metal or spherical ceramic 5 progressively is heated along the direction that drags, heating steps is accomplished in 2 terminations in the heat affected zone; After entering turns to district 3, enter into heat release zone 42 energy accepted that swap out in the heat affected zone.
Spherical metal or spherical ceramic 5 has the excellent comprehensive performance.With the steel ball is example, and steel ball has the good heat transfer ability, and its thermal conductivity factor is approximately 70～80W/ (m*k), can conduct the energy from heat affected zone 2 easily, and the density of steel ball is very high, is 7800kg/m
3, and its thermal capacitance is approximately 0.4～0.5kJ/ (g*K), and comprehensive, it has the volume storage density suitable with aqueous water, has good heat storage capacity; Steel ball has very high fusing point, and it has good conduction high temperature capabilities, and it for example under 500～1000 ℃, carries the energy operation at high temperature, and also unusual stable of performance has good physics and chemical stability; The steel ball wide material sources, processing and cost of transportation are all very cheap; Whole steel ball security of operation in system, cracky not, its service life is very long, even breakage is arranged, also can a bit negative effect not arranged to environment, reveals influence, and operating personnel are not had potential hidden danger yet; If the connection of steel ball problem occurred because of operation, can be out of service easily, check, keep in repair or change.
Preferably, said spherical metal or spherical ceramic 5 spheroid are combined by two hemisphere or approximate hemisphere.
Preferably, said orbicule or cylinder are formed by stacking the similar and different disk combination of materials of some diameters.
The spherical metal in the inner layer metal pipe or the example of spherical a kind of optimization of ceramic 5 are: be arranged in the material that has phase transformation and high volumetric specific heat capacity in 250～550 ℃ of scopes in spherical metal or the spherical ceramic 5 inner confined spaces, for example metal material tin, sodium, potassium, zinc and alloy etc.; Or inorganic salts and mixture such as nitrate or carbonate etc., to improve heat-carrying capacity.
Need to prove that the spherical metal among Fig. 2 or spherical ceramic 5 can be by the fixed profile heat transfer medium (or being referred to as carrier) of other form, such as steel column, graphite nodule/cylinder, Ceramic Balls/cylinder, or spheroid/cylinder of forming of multiple material mixing.From the convenience of describing, hereinafter is an example with spherical metal or spherical ceramic 5 only, and such description that still it is obvious that is equally applicable to the spherical metal or the spherical pottery of these said other types.
In addition, adopt the transmission that connects and under the driving of driving mechanism 11, accomplish heat among the embodiment of preamble between the spherical metal or spherical ceramic 5.But; Same feasible is; There is not specific connection between spherical metal or spherical pottery or other spherical metal or spherical ceramic 5 (for example being made into sphere); Have only mutual dependence each other, a back spherical metal or the spherical pottery previous spherical metal of promotion or spherical ceramic driving move ahead, and accomplish operation.
Fig. 3 has illustrated turning to of heat transfer unit (HTU) 1 to distinguish 3.Turn to district 3 to connect said heat affected zone 2 and heat release zone 4.That is to say that the said district 3 that turns to is between said heat affected zone 2 and heat release zone 4.In an example, the said district 3 that turns to comprises the outer bellows 8 of arc and the inner layer metal pipe 9 of arc.This skin arc bellows 8 is used for the difference of inner layer metal pipe 9 and the stroke of outer layer glass tube 6 of inner layer metal pipe 7 and the arc of compensated linear.
In an example; In the whole heat transfer system, be in the inner layer metal pipe in the close space of envelope, add inert gas helium (He) or pressurized helium in the space; Because of helium has lower density; Have the unit coefficient of heat transfer that is superior to many times of air,, can further improve exchange capability of heat after the helium pressurization to improve the heat convection condition; And helium is an inert protective gas, can reduce the oxidative damage in the hot environment of spherical metal or spherical pottery.Preferably; The inner surface of inner layer metal pipe part of 2 in the heat affected zone has high emissivity pattern or cover layer and combination thereof; The oxide coating of inner layer metal pipe internal surface for example; Or rough surface and repeating heats pattern or the rough surface that the cooling back obtains and covers one deck high emissivity layer, to strengthen said inner layer metal pipe to fixed profile heat transfer medium radiations heat energy.
Fig. 4 a-4d has illustrated the structure embodiment of spherical metal or spherical ceramic 5.
Fig. 4 a illustrates the outer shape sketch map of spherical metal or spherical ceramic 5.Spherical metal or spherical ceramic 5 itself is spherical in shape can be done rolling movement.Spherical metal or spherical ceramic 5 sides are cut flat, so that the serial connection between a plurality of spherical metal or the spherical pottery; Spherical metal or spherical ceramic 5 is in central hole so that said spherical metal or spherical ceramic 5 and spherical metal or spherical ceramic 5 between be connected linear arrangement in the whole solar energy heat-transferring device 1 through jockey such as chain type jockey, screw device.Fig. 4 b shows the structure of spherical metal or spherical a kind of optimization of ceramic 5, and its outside is made for multi-groove structure, with increasing its heat exchange area, in time conducts the heat of himself; The cooling medium in heat release zone 4 for example passes spherical metal or of multi-groove structure at spherical ceramic 5 o'clock, because of it has bigger surface area, has increased its heat exchange efficiency, can great amount of heat be released into cooling medium at short notice, thereby help transmission heat.
Fig. 4 c sketch map illustrates spherical metal or spherical ceramic 5 and is designed to the convex inner trough structure; So to increase single spherical metal or spherical ceramic 5 volume and surface area; Be beneficial to single spherical metal or spherical ceramic 5 and accept more heat in the heat affected zone and discharge more heat in heat release zone, the two sides is not parallel in the convexity groove simultaneously, and the angle opening is outside; Hyperthermia radiation can take place in heat release zone 4 in the spherical metal of favourable high temperature or spherical ceramic 5 more, to make things convenient for release heat.
Fig. 4 d is the sketch map that spherical metal or spherical ceramic 5 is made up of the multi-disc disk; Illustrate the another kind of preferred structure of spherical metal or spherical ceramic 5 among the figure, spherical metal or spherical ceramic 5 is made up of the multi-disc disk, and the center is worn axle and connected balling-up; Area of dissipation is big, convenient conduction heat; Totally easy to make, with low cost.
Preferably; The outer surface of fixed profile heat transfer medium has high absorb high emissivity pattern or cover layer or coating and combination thereof; The oxide coating of inner layer metal pipe internal surface for example; Or rough surface and repeating heats pattern that the cooling back obtains or arc differential oxide ceramic coating or rough surface and covers one deck high emissivity layer, with increase steel ball in the heat affected zone 2 absorbability, in the thermal radiation capability of heat release zone 4.
Preferably; The inner layer metal pipe scribbles the high-absorbility coating at the part inner surface of heat release zone 4; The outer surface of part has high emissivity pattern or cover layer and combination thereof; The for example oxide coating of inner layer metal pipe internal surface, or rough surface and repeating heats pattern or the rough surface that the cooling back obtains and covers one deck high emissivity layer; With the absorbability of the heat that increases heat release zone 4 inner layer metal inside pipe walls and the heat releasability of outer wall, overall enhanced exothermal efficiency.
Obviously can know that thus all spherical metals or spherical ceramic 5 are in whole solar energy heat-transferring device 1.Spherical metal or spherical ceramic 5 is advanced with the form of rolling in the inner layer metal pipe, reduces the energy consumption that drives transportation, reduce spherical metal or spherical ceramic 5 and the inner layer metal inside pipe wall between wearing and tearing, increase the service life.
Spherical metal or spherical ceramic 5 through turning to district 3, gets into heat release zone 4 through after being heated of heat affected zone 2.An example of the present invention is that the use circulating pump makes heat exchanging fluid for example helium or pressurized helium, gets into heat release zone 4 with given pace, and overheated spherical metal or spherical ceramic 5 heat are taken out of.Spherical metal or spherical ceramic 5 is in this heat release zone 4 time; The hot operation of helium process is between the spherical metal or spherical ceramic 5 of heat release zone 4; The ability that has conducted well heat because of spherical metal or spherical ceramic 5; The helium temperature snatch rises, and so obtains the high temperature helium, and spherical metal of high temperature or spherical ceramic 5 heat are swapped out; Spherical metal or spherical ceramic 5 is 2 absorption heats from the heat affected zone, move to heat release zone 4 release heat, about 300 ℃ of the reduction of its temperature.In the full annular structural system, heat affected zone 2 with turn in the district 3, all need carry out the maintenance and the maintenance of energy to the spherical metal or spherical ceramic 5 the condition of high temperature, and the main work purposes of heat release zone 4 for will be in the heat affected zone the swapping out of 2 energy accepted.Spherical metal or spherical ceramic 5 in the heat release zone 4 is under the effect of driving mechanism 11, and the spherical metal or spherical ceramic 5 that drives in the whole system moves, and after the completion heat release, gets into next heat affected zone 2, so circulation conduction heat.In these examples of implementation, driving mechanism 11 can be realized being heated in solar energy heat-transferring device 1 for conventional gear drive drives spherical metal or spherical ceramic 5, operation, heat release, the cyclic process of being heated again.
According to an embodiment of the present, the width of reflecting surface type is assumed to 5m, and heat affected zone 2 is 120m with the equal in length of reflecting surface type, Beijing area average solar irradiation density 0.8kW/m
2, the entire system utilization ratio is 0.75, the diameter 60mm of spherical metal or spherical pottery (for example steel ball) 5, and the diameter of outer layer glass tube 6 is 76mm, between two balls certain clearance is arranged, and arranges 15 steel balls, steel ball density 7800kg/m for fixed every meter
3, specific heat capacity is 0.43kJ/ (kg*K), steel ball through heat affected zone 2 after, temperature rises 300 ℃; Drawing the time that steel ball need move in the heat affected zone of 120m through computational analysis is 576s, and then steel ball is that 120m/576sm/s is 0.208m/s in the speed of service of integral body.
Fig. 5 a and 5b are the structural representation that spherical metal or the airtight inside of spherical ceramic 5 hollows have filler 15.Fig. 5 a arranges the sketch map with the high filler 15 of phase transformation and volume specific heat in spherical metal or the spherical ceramic 5 inner confined spaces; Spherical metal shown in the figure or spherical ceramic 5 inside are the confined space of hollow, are furnished with in it to have low melting point and the high filler of volumetric specific heat capacity, for example metal material tin, sodium, potassium, zinc and alloy etc. in 250～550 ℃ of scopes; Or inorganic salts and mixture such as nitrate or carbonate etc., to improve heat-carrying capacity.Fig. 5 b is that spherical metal or spherical ceramic 5 has the sketch map that the structure stack of filler 15 is formed by a plurality of inside, and it has bigger surface this structure, easily acceptance and release heat.Need spray at hollow confined space inwall, surface treatment such as vacuum coating, improve the corrosion protection ability, prolong its service life.
According to an embodiment of the present, the width of reflecting surface type is assumed to 5m, and heat affected zone 2 is 120m with the equal in length of reflecting surface type, Beijing area average solar irradiation density 0.8kW/m
2, the entire system utilization ratio is 0.75, the diameter of outer layer glass tube 6 is 76mm, the diameter 60mm of spherical metal or spherical ceramic 5 (they are example with the steel ball), steel ball density 7800kg/m
3,, specific heat capacity is 0.43kJ/ (kg*K), wherein inner confined space accounts for the half the of spheroid volume, and confined space filler 15, zinc for example, the zinc fusing point is 420 ℃, 906 ℃ of boiling points, density is 7140kg/m
3, avergae specific heat is 0.394kJ/ (kg*K), heat of vaporization is 110.8kJ/kg; Between two balls certain clearance is arranged, arrange 15 steel balls 5 for fixed every meter, after steel ball and zinc ball warp are crossed heat affected zone 2, arrive 550 ℃ of temperature from 250 ℃ of temperature and rise 300 ℃; Then the volume of the zinc of the quality of each steel ball and confined space is 5.65 * 10
-5m
3Quality is respectively 0.440kg and 0.404kg, spheroid that comprises steel and zinc then, and temperature rises to 550 ℃; The heat that can hold is 0.0413kWh; Per hour recipient can be accepted the solar heat of 360kwh, then need from system, remove the steel ball of 300 ℃ of 8716 temperature risings, the fixed profile heat transfer medium of zinc ball in one hour altogether, and then steel ball, the speed of service of zinc ball heat transfer medium in system are 0.161m/s.
Fig. 6 is to be the application of heat transfer unit (HTU) aspect the solar energy tower type concentrating to generate power of the embodiment of the invention.As shown in the figure, heat affected zone 2 is positioned at the point type focal zone of solar energy tower type concentrating to generate power, the fixed profile heat transfer medium spiral through heat affected zone 2; Be heated at the point type focal zone, accept energy, through with the transmission of accomplishing energy after preceding text are described the similar method of operation; Promptly under the driving of drive unit 11,, move to heat release zone 4 heat of accepting is discharged through turning to district 3; After temperature reduces, be circulated back to the heat affected zone 2 of the point type optically focused regional location of solar energy tower type concentrating to generate power, accept the solar energy of next round; Constantly circulation is so sent out heat outside this device with the heat of accepting continuously.
One embodiment of the present of invention select for use steel ball as the fixed profile heat transfer medium, optimize steel ball inside and have the hollow confined space, and hollow confined space inner wall surface has spraying or vacuum coating coating, improves anti-corrosion capability; Comparing the characteristics that have with existing heat transfer medium is: thermal conductivity factor is high; Heat transfer efficiency is high; No spillage risk, environmental sound is easy to accept the heat from the inner layer metal pipe of the linearity in the heat affected zone; And be easy to release heat, thereby accomplished the target of high temperature conduction heat at low cost in heat release zone.
Though more than introduced the application's the specific embodiment with reference to accompanying drawing, those of ordinary skill in the art understands, the specific embodiment that can in the application's spirit and scope, make various modification rather than be confined to introduce in the specification the application.
Claims (17)
1. a solar energy heat-transferring device (1) comprises heat affected zone (2), heat release zone (4), fixed profile heat transfer medium and drive unit (11); Wherein, be provided with the inner layer metal pipe in said heat affected zone (2), heat release zone in (4), said fixed profile heat transfer medium is in said inner layer metal pipe; Said heat affected zone (2) is positioned at solar light and accepts the position, and said inner layer metal pipe scribbles the coating of high-absorbility low-launch-rate at the outer surface of the part of heat affected zone; Said driving mechanism (11) drives said fixed profile heat transfer medium and in solar energy heat-transferring device (1), moves.
2. solar energy heat-transferring device according to claim 1 (1) is characterized in that, heat affected zone (2) are positioned on the long focal line of parabolic reflection groove or Fresnel reflection lens array or are positioned at tower optically focused regional location.
3. solar energy heat-transferring device according to claim 1 and 2 (1) is characterized in that, the space that forms between said inner layer metal pipe (7,9) and the outer layer glass tube is in vacuum state.
4. according to claim 1 or 3 described solar energy heat-transferring devices (1), it is characterized in that linear inner layer metal pipe (7) inner surface of said heat affected zone 2 has high emissivity pattern or cover layer and combination thereof; Inner layer metal pipe (9) inner surface of the arc of said heat release zone (4) scribbles the high-absorbility coating, and outer surface has high emissivity pattern or cover layer and combination thereof.
5. solar energy heat-transferring device according to claim 1 (1) is characterized in that, each monomer profile of described fixed profile heat transfer medium is an orbicule or cylindric.
6. according to claim 1 or 5 described solar energy heat-transferring devices (1), it is characterized in that described fixed profile heat transfer medium rolls and advances in the inner layer metal pipe.
7. according to claim 1 or 6 described solar energy heat-transferring devices (1), it is characterized in that non-oxide, high heat transfer gas is added in the space in the described inner layer metal pipe.
8. solar energy heat-transferring device according to claim 7 (1) is characterized in that, said non-oxide, high heat transfer gas is helium or pressurized helium.
9. according to claim 1 or 8 described solar energy heat-transferring devices (1), it is characterized in that described fixed profile heat transfer medium material is a kind of in metal, graphite, metal alloy or the pottery, also or the combination of their variety classes.
10. according to claim 1 or 8 described solar energy heat-transferring devices (1); It is characterized in that; Described fixed profile heat transfer medium comprises spherical metal or spherical pottery (5) shell, is arranged in the filler (15) that has phase transformation and high volumetric specific heat capacity in the required operating temperature range in the confined space of enclosure.
11. solar energy heat-transferring device according to claim 10, wherein said filler (15) are low-melting-point metal, inorganic salts or its mixture.
12. solar energy heat-transferring device according to claim 1 (1) is characterized in that, the outside of said fixed profile heat transfer medium is made for multiple-grooved high surface area structure.
13. solar energy heat-transferring device according to claim 12 (1) is characterized in that, the groove structure of said fixed profile heat transfer medium is the convex structure.
14. solar energy heat-transferring device according to claim 1 (1) is characterized in that, said fixed profile heat transfer medium is formed by stacking the similar and different disk combination of materials of some diameters.
15. solar energy heat-transferring device according to claim 1 (1) is characterized in that, the outer surface of said fixed profile heat transfer medium has high emissivity pattern or cover layer or coating and combination thereof.
16. solar energy heat-transferring device according to claim 1 (1) is characterized in that the fixed profile heat transfer medium is formed by stacking on a plurality of structures, the shell of said structure is spherical metal or spherical pottery (5), and inside has filler (15).
17. solar energy heat-transferring device according to claim 1 (1) is characterized in that, comprises turning to district (3), said inner layer metal pipe is through turning in the district.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102388174A CN102338476A (en) | 2010-07-28 | 2010-07-28 | Solar heat transfer unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102388174A CN102338476A (en) | 2010-07-28 | 2010-07-28 | Solar heat transfer unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102338476A true CN102338476A (en) | 2012-02-01 |
Family
ID=45514341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102388174A Pending CN102338476A (en) | 2010-07-28 | 2010-07-28 | Solar heat transfer unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102338476A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018201319A1 (en) * | 2018-01-29 | 2019-08-01 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Solar radiation receiver, reactor system with a solar radiation receiver, method for heating solid medium by means of concentrated solar radiation and method for solar operation of a thermochemical reaction |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2364413A1 (en) * | 1976-09-14 | 1978-04-07 | Cominda Engineering Ste Civile | Spherical cores coated with black body material - act as heat sinks for solar energy cells |
| CN2241854Y (en) * | 1995-04-27 | 1996-12-04 | 中国科学院大连化学物理研究所 | Steam and high-temp. medium compounded heat-insulating plow-in heat distribution pipeline |
| CN101025291A (en) * | 2007-01-22 | 2007-08-29 | 黄福国 | Light-heat ash heat-collection heater |
| US7296410B2 (en) * | 2003-12-10 | 2007-11-20 | United Technologies Corporation | Solar power system and method for power generation |
| WO2010029411A2 (en) * | 2008-09-12 | 2010-03-18 | Internew Electronics S.R.L. | Thermal vector system for solar concentration power plant |
| CN201866942U (en) * | 2010-07-28 | 2011-06-15 | 刘阳 | Solar heat transferring device |
-
2010
- 2010-07-28 CN CN2010102388174A patent/CN102338476A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2364413A1 (en) * | 1976-09-14 | 1978-04-07 | Cominda Engineering Ste Civile | Spherical cores coated with black body material - act as heat sinks for solar energy cells |
| CN2241854Y (en) * | 1995-04-27 | 1996-12-04 | 中国科学院大连化学物理研究所 | Steam and high-temp. medium compounded heat-insulating plow-in heat distribution pipeline |
| US7296410B2 (en) * | 2003-12-10 | 2007-11-20 | United Technologies Corporation | Solar power system and method for power generation |
| CN101025291A (en) * | 2007-01-22 | 2007-08-29 | 黄福国 | Light-heat ash heat-collection heater |
| WO2010029411A2 (en) * | 2008-09-12 | 2010-03-18 | Internew Electronics S.R.L. | Thermal vector system for solar concentration power plant |
| CN201866942U (en) * | 2010-07-28 | 2011-06-15 | 刘阳 | Solar heat transferring device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018201319A1 (en) * | 2018-01-29 | 2019-08-01 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Solar radiation receiver, reactor system with a solar radiation receiver, method for heating solid medium by means of concentrated solar radiation and method for solar operation of a thermochemical reaction |
| DE102018201319B4 (en) * | 2018-01-29 | 2020-11-19 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Solar radiation receiver, reactor system with a solar radiation receiver, method for heating solid medium by means of concentrated solar radiation, and method for solar operation of a thermochemical reaction |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Bellos et al. | A review of concentrating solar thermal collectors with and without nanofluids | |
| CN208380764U (en) | A kind of Bretton solar-thermal generating system of the improvement based on slot type heliostat | |
| JP6280275B2 (en) | Solar thermal power generation method and apparatus by gas endotherm based on characteristic absorption spectrum | |
| CN104567026B (en) | Solar thermal collector and method for converting solar energy into mesothermal heat energy by utilizing same | |
| CN105841363B (en) | A kind of word profile cavity-type solar heat dump of half built-in 8 and its method of work | |
| CN102606430B (en) | Separately running disc-type solar concentrated power generating system | |
| CN101539123A (en) | Groove-tower combined two-stage heat-storage solar-heat power generation system | |
| CN103629829B (en) | Stirling heat engine solar heat collector | |
| CN102445008B (en) | Tower-type solar energy water/steam compound type plate fin hot plate type heat absorber | |
| CN106568213A (en) | Solar energy storing heat collector and solar heat collecting system | |
| CN102135334A (en) | Silica glass tube bundle type air heat absorber for solar heat generating station | |
| WO2012022273A1 (en) | Solar power ammonia thermoelectric conversion system | |
| CN106225541A (en) | The tower solar-thermal generating system of the many heat collectors of single column formula | |
| CN103062743B (en) | A kind of cavity type natural recirculating type solar energy wet steamer | |
| CN201866942U (en) | Solar heat transferring device | |
| CN2384176Y (en) | Heat pipe solar heat collector | |
| CN106595076A (en) | Solar heat collection system capable of directly generating high-temperature steam | |
| CN102338476A (en) | Solar heat transfer unit | |
| CN101029778B (en) | Solar thermal generating system of optical lens hot pipe | |
| CN104676568A (en) | Steam generator and steam generation system based on line focusing solar heat collection | |
| CN201811461U (en) | High-efficiency heat pipe type internal light-focusing solar vacuum heat-collecting pipe | |
| CN210486142U (en) | Cavity type gas-liquid two-phase heat absorber | |
| CN203642527U (en) | Solar thermal collector for Stirling heat engine | |
| CN108800629B (en) | Exposed heat absorber suitable for tower type solar thermal power station | |
| CN103148602A (en) | Solid particle accumulation bed-type air heat absorber for solar thermal power station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING TERASOLAR PHOTOTHERMAL TECHNOLOGIES CO., L Free format text: FORMER OWNER: LIU YANG Effective date: 20131113 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100195 HAIDIAN, BEIJING TO: 100070 FENGTAI, BEIJING |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20131113 Address after: 100070 Beijing City, Fengtai District science and Technology Park Fung Fu Road No. 4 Building 4 room 22B04 Applicant after: Beijing TeraSolar Photothermal Technology Co., Ltd. Address before: 100195, Beijing, Haidian District, Germany auspicious home 18-2-101 Applicant before: Liu Yang |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120201 |