CN103017366A - 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
CN103017366A
CN103017366A CN2012105381886A CN201210538188A CN103017366A CN 103017366 A CN103017366 A CN 103017366A CN 2012105381886 A CN2012105381886 A CN 2012105381886A CN 201210538188 A CN201210538188 A CN 201210538188A CN 103017366 A CN103017366 A CN 103017366A
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China
Prior art keywords
pipe
temperature heat
heat pipe
thermal insulation
insulation board
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Application number
CN2012105381886A
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Chinese (zh)
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CN103017366B (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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Priority to CN201210538188.6A priority Critical patent/CN103017366B/en
Publication of CN103017366A publication Critical patent/CN103017366A/en
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Classifications

    • 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 the 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 plane reflection lens array by a large amount of, sunshine reflexed on the solar receiver that places a high top of tower, thus the technology that finally converts solar energy into electrical energy.This technology be owing to can realize jumbo solar energy/electric energy conversion, thereby has been subject to great attention.Central receiver is that present various countries are about the research emphasis of solar energy thermal-power-generating key technology as the core component of solar energy thermal-power-generating.
The receiver of solar heat power generation system has two types: cavity type and outside are subjected to the light type.Receiver for cavity type, the sunshine that heliostat reflects can shine cavity inside, therefore the heat loss of receiver can be controlled at bottom line, but, cavity type receiver institute adaptable mirror field arrangement is more single, namely be no more than 180 ° and be subjected to light, therefore the scale of Jing Chang also is restricted, thereby the capacity that has hindered tower-type solar thermal power generating system amplifies.Although the outside is subjected to the heat loss of light type receiver larger than cavity type, it can be all-round to being subjected to light, and pattern and scale strong adaptability to Jing Chang are applicable to large capacity power station.
Before the present invention, existing document discloses a kind of outside of adopting high-temperature heat pipe to do heat absorbing units and has been subjected to light type receiver.But, still there are some very important problems in the receiver of this kind structure, work on receiver has certain impact: owing to the reason of solar azimuth, the heat that the heat pipe of different directions absorbs is different, and the Temperature of Working of the heat pipe heating of absorbing heat less 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's entropy to increase, so that energy utilization efficiency reduces.
Summary of the invention
The technical problem to be solved in the present invention is, for the defects of prior art, provides a kind of capacity usage ratio higher partition type solar energy high temperature heat pipe central receiver.
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, a plurality of thermal insulation board groups that vertically arrange are divided into a plurality of districts with described upper header pipe, lower collecting box pipe, and the upper header pipe, the lower collecting box pipe that are in same district are interconnected; Each described thermal insulation board group is provided with magnetic valve, and when this magnetic valve was in open state, working fluid flow to the upper header pipe of adjacent region from the 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 at least two between the adjacent region and up and down staggered opening thermal insulation board form, described magnetic valve is arranged on the working fluid passage between the 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 plane, upper wall place with described lower collecting box pipe from the upper wall of described upper header pipe, and the heat insulation version of another adjacent with this thermal insulation board extends up to the plane at the lower wall place of described upper header pipe from the lower wall of described 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 is divided into four districts with described upper header pipe, 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 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: more reasonable to the energy utilization by header tube and high-temperature heat pipe are carried out subregion, improved the thermal efficiency of whole receiver from thermodynamic (al) angle.
Will be appreciated that the feature in the above each side of the present invention is independent assortment within the scope of the invention, and be not subjected to the restriction of its order---as long as the technical scheme after the combination drops in the connotation of the present invention.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the 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 adjacent location of the present invention;
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 only is used for explanation the present invention and is not used in and limits the scope of the invention, 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 annular tubesheet 10 is divided into endotherm section 501 and heat release section 502 two parts with high-temperature heat pipe 5; The endotherm section of per two adjacent high-temperature heat pipes is connected by straight fins 6; The sleeve pipe 7 that is used for the 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 part that the surface of high-temperature heat pipe endotherm section 501 and straight fins 6 is in high-temperature heat pipe central receiver 13 outsides scribbles high temperature resistant coating for selective absorption 504; High-temperature heat pipe heat release section 502 outer walls that are positioned at sleeve pipe 7 inside install helical fin 503 additional, are used for the 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 the sleeve pipe can be water/steam or pressure-air.
From Fig. 2 and Fig. 4 as seen: thermal insulation board 20 is divided into A, B, C and four districts of D with this central receiver.The staggered opening of visible thermal insulation board from the profile of Fig. 4, thermal insulation board extends downwardly into the plane at lower collecting box pipe upper wall place from the upper wall of upper header pipe, and another piece thermal insulation board extends up to the plane at the lower wall place of upper header pipe from the lower wall of lower collecting box pipe.Magnetic valve 203 is on the working fluid passage between two thermal insulation boards, when this magnetic valve is 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, the thermal insulation board group comprises a plurality of up and down thermal insulation boards of staggered opening, is provided with magnetic valve at least one working fluid passage.In other embodiments, a plurality of thermal insulation board groups are divided into 2 to 8 districts with central receiver, are also separated by the thermal insulation board group between the adjacent district.
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 on the high temperature resistant coating for selective absorption 504 around receiver, 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, final is 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 outer helical fin 503 of pipe by heat conduction.Simultaneously, the working fluid that flows to from working fluid import 8 flows into the upper header pipe 101 of D through pipeline T1, and when 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 is taken away the heat of high-temperature heat pipe endotherm section tube wall and helical fin 503, then is 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, by the sunshine of heliostat 14 reflection from around all incide the outer surface of high-temperature heat pipe central receiver 13, 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.
This example is implemented the quantity of the high-temperature heat pipe 5 of employing and can in very large range be regulated according to the scale of Jing Chang; High-temperature heat pipe 5 all directly is subjected to light, has avoided the situation of part high-temperature heat pipe zero load to occur; Augmentation of heat transfer mode in the sleeve pipe 7 can have multiple choices, and the working fluid flow velocity is high, good effect of heat exchange.
When implementing, this example considered the thermal insulation between the zones of different, adopt thermal resistance larger, the goodish vacuum insulation panel of heat-proof quality, thermal conductivity factor only are 0.004, guaranteed greatly the heat transmission between the high low temperature between the zones of different, the entropy that has reduced system produces.Simultaneously, 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 heat-insulation layer 11 outer shells 12 that then are covered with.So just reduce heat loss to greatest extent, guaranteed the thermal efficiency of high-temperature heat pipe central receiver 13.
The below is bright advantage of the present invention from the principle:
If original state is T 0, C 0, v 0, T 0Be environment temperature.Be not A before the subregion, recepting the caloric is Q, and the process entropy produces and is S GA, process (fire is used) loss is E LABe B after the subregion, because zone 2 and regional 3 change procedures are roughly the same, can be combined into a process, namely whole process is divided into three phases, by original state at regional 1 interior absorption Q 1Thermal change is to state 1, i.e. T 1, C 1, v 1, by state 1 the zone 2 and 3 interior absorption Q 2Thermal change is to state 2, i.e. T 2, C 2, v 2, by state 2 the zone 4 interior absorbing heat Q 3Changing to state 3, is T 3, C 3, v 3, the entropy of whole process produces and is S GB, process (fire is used) loss is E LB, Q=Q then 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 0-1/T 2)+?Q 3(1/T 0-1/T 3),E lB=?T 0?S gB
Obviously, S GA-S GB=Q 1(1/T 1-1/T 3)+Q 2(1/T 0+ 1/T 2-1/T 3-1/T 1)+Q 3(1/T 0-1/T 2), again because T 3>T 2>T 1>T 0So, S GA-S GB>0, also be E LA>E LB, i.e. the loss of (fire with) in the A process is greater than the B process.Also be that the thermal efficiency of receiver can be higher after the subregion.
Except above embodiment, the present invention can have numerous embodiments, and all equivalence replacements of implementing on basis of the present invention or similar combined transformation are all within the protection domain that the present invention requires.

Claims (6)

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: a plurality of thermal insulation board groups (20) that vertically arrange are with described upper header pipe, the lower collecting box pipe is divided into a plurality of districts, is in the upper header pipe in same district, the 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 was in open state, working fluid flow to the upper header pipe of adjacent region from the 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 at least two between the adjacent region and up and down staggered opening thermal insulation board form, described magnetic valve is arranged on the working fluid passage between the adjacent thermal insulation board.
3. partition type solar energy high temperature heat pipe central receiver according to claim 2, it is characterized in that: described thermal insulation board extends downwardly into plane, upper wall place with described lower collecting box pipe from the upper wall of described upper header pipe, and the heat insulation version of another adjacent with this thermal insulation board extends up to the plane at the lower wall place of described upper header pipe from the lower wall of described lower collecting box pipe.
4. partition type solar energy high temperature heat pipe central receiver according to claim 1, it is characterized in that: described thermal insulation board is divided into four districts with described upper header pipe, lower collecting box pipe.
5. partition type solar energy high temperature heat pipe central receiver according to claim 1, it is characterized in that: described thermal insulation board is vacuum insulation panel.
6. partition type solar energy high temperature heat pipe central receiver according to claim 5, it is characterized in that: the thermal conductivity factor of described vacuum insulation panel is 0.001 ~ 0.01.
CN201210538188.6A 2012-12-13 2012-12-13 Partitioned solar high-temperature heat pipe central receiver Active CN103017366B (en)

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CN103017366B CN103017366B (en) 2014-06-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104101112A (en) * 2014-07-11 2014-10-15 上海锅炉厂有限公司 Solar heat collection 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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104101112A (en) * 2014-07-11 2014-10-15 上海锅炉厂有限公司 Solar heat collection receiver
CN104101112B (en) * 2014-07-11 2015-11-18 上海锅炉厂有限公司 A kind of solar energy heating receiver

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