CN103017366B - Partitioned solar high-temperature heat pipe central receiver - Google Patents

Partitioned solar high-temperature heat pipe central receiver Download PDF

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Publication number
CN103017366B
CN103017366B CN201210538188.6A CN201210538188A CN103017366B CN 103017366 B CN103017366 B CN 103017366B CN 201210538188 A CN201210538188 A CN 201210538188A CN 103017366 B CN103017366 B CN 103017366B
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China
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pipe
temperature heat
heat pipe
thermal insulation
central receiver
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CN201210538188.6A
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CN103017366A (en
Inventor
王军
张博文
王俊
周香香
刘静静
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Southeast University
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Southeast University
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S20/00Solar heat collectors specially adapted for particular uses or environments
    • F24S20/20Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00Solar heat collectors using working fluids
    • F24S10/90Solar heat collectors using working fluids using internal thermosiphonic circulation
    • F24S10/95Solar heat collectors using working fluids using internal thermosiphonic circulation having evaporator sections and condenser sections, e.g. heat pipes
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers
    • Y02E10/44Heat exchange systems

Abstract

The invention discloses a partitioned solar high-temperature heat pipe central receiver (13), which comprises a plurality of high-temperature heat pipes (5). The high-temperature heat pipes (5) are vertically arranged and are respectively divided into an upper section and a lower section by a ring pipe (10); the upper section of each upper section is a heat release section (502); casing pipes (7) are respectively arranged outside the heat release sections; the casing pipes (7) are respectively communicated with upper header pipes (101-401) and lower header pipes (102-402); the upper header pipes and the lower header pipes are divided into multiple areas by a plurality of thermal baffle units (20) arranged along the vertical direction; and the upper header pipes and the lower header pipes located in the same area are respectively communicated with each other; each thermal baffle unit (20) is provided with electromagnetic valves (103 and 104); and when the electromagnetic valves are in an open state, working fluid flows to the upper header pipes in the adjacent region from the lower header pipes. The photo-thermal conversion efficiency can be improved by the partitioned solar high-temperature heat pipe central receiver disclosed by the invention.

Description

A kind of partition type solar energy high temperature heat pipe central receiver
Technical field
The present invention relates to solar facilities field, relate in particular to a kind of partition type solar energy high temperature heat pipe central receiver.
Background technology
Solar energy thermal-power-generating remembers it is the plane reflection lens array by a large amount of, sunshine reflexed on the solar receiver that is placed in a high top of tower, thus the technology finally converting solar energy into electrical energy.This technology is owing to can realizing jumbo solar energy/electric energy conversion, thereby has been subject to great attention.Central receiver, as the core component of solar energy thermal-power-generating, is the research emphasis of current various countries about solar energy thermal-power-generating key technology.
The receiver of solar heat power generation system has two types: cavity type and outside are subject to light type.For the receiver of cavity type, the sunshine that heliostat reflects can be irradiated to cavity inside, therefore the heat loss of receiver can be controlled to bottom line, but, cavity type receiver institute adaptable mirror field arrangement is more single, be no more than 180 ° and be subject to light, therefore the scale of Jing Chang is also restricted, thereby has hindered the capacity amplification of tower-type solar thermal power generating system.Although be subject to the heat loss of light type receiver larger than cavity type outside, it can be all-round to being subject to light, and the pattern to Jing Chang and scale strong adaptability, be applicable to large capacity power station.
Before the present invention, existing document discloses a kind of outside that adopts high-temperature heat pipe to do heat absorbing units and has been subject to light type receiver.But, still there are some very important problems in the receiver of this kind of structure, the work of receiver is had to certain impact: due to the reason of solar azimuth, the heat difference that the heat pipe of different directions absorbs, the Temperature of Working of the heat pipe that absorbs heat less heating is lower, and the Temperature of Working of the heat pipe heating of absorbing heat more is higher, all heat pipes are unified heating working medium, after higher temperature working medium and lower temperature working medium are mixed, can cause system entropy to increase, energy utilization efficiency is reduced.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned defect of prior art, provides the partition type solar energy high temperature heat pipe central receiver that a kind of capacity usage ratio is higher.
For achieving the above object, the adoptable technical scheme of the present invention is:
A kind of partition type solar energy high temperature heat pipe central receiver, it comprises high-temperature heat pipe, this high-temperature heat pipe is vertical placement, and be divided into two sections by annular tubesheet, epimere is heat release section, and the outside of this heat release section is provided with sleeve pipe, and described sleeve pipe is communicated with upper header pipe, lower collecting box pipe, described upper header pipe, lower collecting box pipe are divided into multiple districts by multiple thermal insulation board groups that vertically arrange, and upper header pipe, lower collecting box pipe in same district are interconnected; Each described thermal insulation board group is provided with magnetic valve, and when this magnetic valve is during in open state, working fluid flows to the upper header pipe of adjacent region from lower collecting box pipe.
An aspect according to partition type solar energy high temperature heat pipe central receiver of the present invention: described thermal insulation board group by least two between adjacent region and up and down staggered opening thermal insulation board form, described magnetic valve is arranged on the working fluid passage between adjacent thermal insulation board.
An aspect according to partition type solar energy high temperature heat pipe central receiver of the present invention: described thermal insulation board extends downwardly into the upper wall of magnetic valve from the upper wall of described upper header pipe, another heat insulation version adjacent with this thermal insulation board extends up to the lower wall of magnetic valve from the lower wall of described lower collecting box pipe, two thermal insulation boards lay respectively at the both sides of magnetic valve passage, to allow fluid to flow through magnetic valve passage.
An aspect according to partition type solar energy high temperature heat pipe central receiver of the present invention: described upper header pipe, lower collecting box pipe are divided into Si Ge district by described thermal insulation board.
An aspect according to partition type solar energy high temperature heat pipe central receiver of the present invention: described thermal insulation board is vacuum insulation panel.
An aspect according to partition type solar energy high temperature heat pipe central receiver of the present invention: the thermal conductivity factor of described vacuum insulation panel is 0.001 ~ 0.01.
The advantage that partition type solar energy high temperature heat pipe central receiver of the present invention has is: by header tube and high-temperature heat pipe are carried out to subregion, more reasonable to energy utilization, improved the thermal efficiency of whole receiver from thermodynamic (al) angle.
Will be appreciated that, the feature independent assortment within the scope of the invention in the above each side of the present invention, and be not subject to its restriction sequentially---as long as the technical scheme after combination drops in connotation of the present invention.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the schematic flow sheet of partition type solar energy high temperature heat pipe central receiver of the present invention;
Fig. 2 is the top plan view of partition type solar energy high temperature heat pipe central receiver of the present invention;
Fig. 3 is the upward view of partition type solar energy high temperature heat pipe central receiver of the present invention;
Fig. 4 is high-temperature heat pipe heat release section and the sleeve structure schematic diagram of two location that the present invention is adjacent;
Fig. 5 is the running environment schematic diagram of partition type solar energy high temperature heat pipe central receiver of the present invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention, should understand these embodiments is only not used in and limits the scope of the invention for the present invention is described, after reading the present invention, those skilled in the art all falls within the application's claim limited range to the modification of the various equivalent form of values of the present invention.
As shown in Figure 1 to Figure 3, high-temperature heat pipe central receiver 13 structures of the present invention include several high-temperature heat pipes 5, and high-temperature heat pipe 5 is divided into endotherm section 501 and heat release section 502 two parts by annular tubesheet 10; The endotherm section of every two adjacent high-temperature heat pipes is connected by straight fins 6; Sleeve pipe 7 for working fluid heat exchange connects into integral passage with upper header pipe and lower collecting box pipe, working fluid import 8, working fluid outlet 9; The surface of high-temperature heat pipe endotherm section 501 and straight fins 6 scribbles high temperature resistant coating for selective absorption 504 in the part of high-temperature heat pipe central receiver 13 outsides; High-temperature heat pipe heat release section 502 outer walls that are positioned at sleeve pipe 7 inside install helical fin 503 additional, for strengthening fluid heat exchange.The tubing of the high-temperature heat pipe 5 that this example is implemented is heat-resisting alloy steel, and inner capillary structure is silk screen liquid-sucking core 505, and the working medium of high-temperature heat pipe 5 interior employings is liquid metal sodium, and the working fluid in sleeve pipe can be water/steam or pressure-air.
From Fig. 2 and Fig. 4: this central receiver is divided into A, B, C and D Si Ge district by thermal insulation board 20.The staggered opening of visible thermal insulation board from the profile of Fig. 4, a thermal insulation board extends downwardly into the upper wall of magnetic valve from the upper wall of upper header pipe, another piece thermal insulation board extends up to the lower wall of magnetic valve from the lower wall of lower collecting box pipe, two thermal insulation boards lay respectively at the both sides of magnetic valve passage, to allow fluid to flow through magnetic valve passage.Magnetic valve 203 is on the working fluid passage between two thermal insulation boards, when this magnetic valve is during in open state, working fluid flow to the lower collecting box pipe 202 of homonymy from the upper header pipe 201 of a side, and flows to the upper header pipe 301 in another district from this lower collecting box pipe 202.In other embodiments, thermal insulation board group comprises multiple thermal insulation boards of staggered opening up and down, at least one working fluid passage, is provided with magnetic valve.In other embodiments, central receiver is divided into 2 to 8 districts by multiple thermal insulation board groups, between adjacent district, also separated by thermal insulation board group.
With reference to figure 1 and Fig. 5, central receiver application process of the present invention is described: the sunshine after the heliostat 14 of some is assembled incides from receiver surrounding high temperature resistant coating for selective absorption 504, at this, transform light energy becomes heat energy, heat is directly passed to the surface of endotherm section outer surface and the straight fins 6 of high-temperature heat pipe 5, is finally all absorbed by the endotherm section 501 of high-temperature heat pipe; All heat energy passes to liquid metal sodium by the tube wall of the endotherm section 501 of high-temperature heat pipe, and liquid metal sodium is passed to heat by the phase-change heat-exchange of evaporative condenser the tube wall of high-temperature heat pipe heat release section 502; Part heat passes to the helical fin 503 outside pipe by heat conduction.Meanwhile, the working fluid flowing to from working fluid import 8, flows into the upper header pipe 101 of D through pipeline T1, and while flowing through sleeve pipe 7, the heat of 502 tube walls and 503 is taken away, and be preheated; Then working fluid is from the lower collecting box pipe 102 of D, flow to respectively upper header pipe 201 and the upper header pipe 301 in C district and B district through magnetic valve 103,104, then the sleeve pipe 7 of flowing through, takes away the heat of high-temperature heat pipe endotherm section tube wall and helical fin 503, is then evaporated to saturated vapor; Then saturated vapor flows to respectively the upper header pipe 401 in A district from the lower collecting box pipe 202 and 302 in C district and B district, the sleeve pipe 7 of then flowing through, and heat exchange, is heated to be superheated steam, is heated to predetermined parameter, enters steam turbine 15 from the lower collecting box pipe 402 in A district, generates electricity.
As shown in Figure 5, the running environment of high-temperature heat pipe central receiver 13 of the present invention is the Jing Chang of a circumferential arrangement, the sunshine being reflected by heliostat 14 all incides the outer surface of high-temperature heat pipe central receiver 13 from surrounding, realize the operation of high-temperature heat pipe central receiver 13.So high-temperature heat pipe central receiver of the present invention can adapt to the Jing Chang of various scales, thereby can realize the solar electrical energy generation of various capacity.
The quantity that this example is implemented the high-temperature heat pipe 5 adopting can in very large range regulate according to the scale of Jing Chang; High-temperature heat pipe 5 is all directly subject to light, has avoided the situation of part high-temperature heat pipe zero load to occur; Augmentation of heat transfer mode in sleeve pipe 7 can have multiple choices, and working fluid flow velocity is high, good effect of heat exchange.
When implementing, this example considers the thermal insulation between zones of different, adopt thermal resistance larger, the goodish vacuum insulation panel of heat-proof quality, thermal conductivity factor is only 0.004, guaranteed greatly the heat transmission between the high low temperature between zones of different, the entropy that has reduced system produces.Meanwhile, considered the heat insulating ability of whole receiver, in the outside of sleeve pipe 7, upper header pipe and the lower collecting box pipe of receiver coated with resistant to elevated temperatures heat-insulation layer 11, the outer shell 12 that is covered with of heat-insulation layer 11.So just reduce heat loss to greatest extent, guaranteed the thermal efficiency of high-temperature heat pipe central receiver 13.
Bright advantage of the present invention from the principle below:
If original state is T 0, C 0, v 0, T 0for environment temperature.Before subregion, be not A, recept the caloric as Q, process entropy produces as S gA, process (fire is used) loss is E lA; Be B after subregion, due to region 2 and region 3 change procedures roughly the same, can be combined into a process, whole process is divided into three phases, by original state at the interior absorption in region 1 Q 1thermal change is to state 1, i.e. T 1, C 1, v 1, by state 1 at region 2 and 3 interior absorption Q 2thermal change is to state 2, i.e. T 2, C 2, v 2, by state 2 at region 4 interior absorption heat Q 3changing to state 3, is T 3, C 3, v 3, the entropy of whole process produces as S gB, process (fire is used) loss is E lB, Q=Q 1+ Q 2+ Q 3, T 3> T 2> T 1> T 0,
S gA=Q(1/T 0-1/T 3),?E lA=?T 0?S gA?。
S gB=?Q 1(1/T 0-1/T 1)+?Q 2(1/T 1-1/T 2)?+?Q 3(1/T 2-1/T 3),E lB=?T 0?S gB
Obviously, S gA-S gB=Q 1(1/T 1-1/T 2)+Q 2(1/T 0-1/T 1+ 1/T 2-1/T 3)+Q 3(1/T 0-1/T 2), again because T 3> T 2> T 1> T 0so, S gA-S gB> 0 is also E lA> E lB,
(fire is used) loss in A process is greater than B process.Also be that after subregion, the thermal efficiency of receiver can be higher.
Except above embodiment, the present invention can have numerous embodiments, within the protection domain that all equivalences of implementing on basis of the present invention are replaced or similar combined transformation all requires in the present invention.

Claims (4)

1. a partition type solar energy high temperature heat pipe central receiver (13), it comprises high-temperature heat pipe (5), this high-temperature heat pipe (5) is vertical placement, and be divided into two sections by ring pipe (10) plate, epimere is heat release section (502), the outside of this heat release section is provided with sleeve pipe (7), described sleeve pipe (7) and upper header pipe (101-401), lower collecting box pipe (102-402) is communicated with, it is characterized in that: multiple thermal insulation board groups (20) that vertically arrange are by described upper header pipe, lower collecting box pipe is divided into multiple districts, in the upper header pipe in same district, lower collecting box pipe is interconnected, each described thermal insulation board group (20) is provided with magnetic valve (103,104), and when this magnetic valve is during in open state, working fluid flows to the upper header pipe of adjacent region from lower collecting box pipe.
2. partition type solar energy high temperature heat pipe central receiver according to claim 1, it is characterized in that: described thermal insulation board group by least two between adjacent region and up and down staggered opening thermal insulation board form, described magnetic valve is arranged on the working fluid passage between adjacent thermal insulation board.
3. partition type solar energy high temperature heat pipe central receiver according to claim 2, is characterized in that: described upper header pipe, lower collecting box pipe are divided into Si Ge district by described thermal insulation board.
4. partition type solar energy high temperature heat pipe central receiver according to claim 2, is characterized in that: described thermal insulation board is vacuum insulation panel.
CN201210538188.6A 2012-12-13 2012-12-13 Partitioned solar high-temperature heat pipe central receiver Active CN103017366B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201210538188.6A CN103017366B (en) 2012-12-13 2012-12-13 Partitioned solar high-temperature heat pipe central receiver

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CN103017366B true CN103017366B (en) 2014-06-11

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104101112B (en) * 2014-07-11 2015-11-18 上海锅炉厂有限公司 A kind of solar energy heating receiver

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6668555B1 (en) * 2002-12-09 2003-12-30 The Boeing Company Solar receiver-based power generation system
CN1757988A (en) * 2004-10-08 2006-04-12 潘戈 Converging pipe connecting structure of heat pipe type solar energy collector
CN101033892A (en) * 2007-04-16 2007-09-12 中国科学院电工研究所 High temperature heat absorber used in solar tower-type thermal power station
CN101275785A (en) * 2008-01-25 2008-10-01 南京工业大学 High temperature hot pipe center receiver for tower type solar energy heat power generation
CN201973915U (en) * 2011-03-02 2011-09-14 浙江大学 U-shaped passage combined heat pipe receiver

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6668555B1 (en) * 2002-12-09 2003-12-30 The Boeing Company Solar receiver-based power generation system
CN1757988A (en) * 2004-10-08 2006-04-12 潘戈 Converging pipe connecting structure of heat pipe type solar energy collector
CN101033892A (en) * 2007-04-16 2007-09-12 中国科学院电工研究所 High temperature heat absorber used in solar tower-type thermal power station
CN101275785A (en) * 2008-01-25 2008-10-01 南京工业大学 High temperature hot pipe center receiver for tower type solar energy heat power generation
CN201973915U (en) * 2011-03-02 2011-09-14 浙江大学 U-shaped passage combined heat pipe receiver

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