CN107202438A - A kind of heated body glass tube involute surface internal focusing vacuum tube solar heat-collecting device - Google Patents
A kind of heated body glass tube involute surface internal focusing vacuum tube solar heat-collecting device Download PDFInfo
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- CN107202438A CN107202438A CN201710397946.XA CN201710397946A CN107202438A CN 107202438 A CN107202438 A CN 107202438A CN 201710397946 A CN201710397946 A CN 201710397946A CN 107202438 A CN107202438 A CN 107202438A
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- Prior art keywords
- thermal
- tube
- heat pipe
- heat
- reflector
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/006—Methods of steam generation characterised by form of heating method using solar heat
Abstract
The invention discloses a kind of heated body glass tube involute surface internal focusing vacuum tube solar heat-collecting device, including thermal-collecting tube, heat pipe is provided with thermal-collecting tube, reflector is additionally provided with thermal-collecting tube, thermal-collecting tube is arranged in fixed plate, and collector pipe is provided with inside fixed plate, and heat pipe is connected with collector pipe；It is vacuum state between thermal-collecting tube and heat pipe, reflector is arranged on heat pipe side, so that the sunlight that reflector is received is refracted on heat pipe.The invention has the advantages that：Optically focused heat pipe in involute reflector in thermal-collecting tube, the heat energy of heated body glass tube reclaimed water can be converted the solar into, make superheated water, temperature reaches 100~180 DEG C, when superheated water discharges, 100~180 DEG C of steam are converted into, 100 DEG C of boiling water can have both been provided the user, or user provides 100~180 DEG C of steam.
Description
Technical field
The present invention relates to solar energy acquisition applied technical field, and in particular in a kind of heated body glass tube involute surface
Concentrating vacuum tube solar thermal collector.
Background technology
In recent years, it is solar energy hot-cast socket cryogenic applications based on the solar water heater of common all-glass vacuum tube
The successful product of (less than 100 DEG C), its socially a large amount of popularization, serves energy-saving and environmental protection, the positive role of carbon drop.
The middle temperature of solar energy hot-cast socket, which applies (100~250 DEG C), has the extensive market demand and energy-saving and environmental protection, the positive work of carbon drop
With the industry such as chemical industry, food, weaving, food and drink, clothes, medicine has eager demand.At present, this eager demand
It can not still be met, can only be solved by traditional coal burning, fuel gas buring or power consumption.Existing common full glass
Solar vacuum-tube water heater (including heat pipe solar energy water heater), due in its thermal-arrest principle and structure design,
Its heated body pipe or plate can not possibly work at higher operating temperatures, in the temperature of the middle temperature application (100~250 DEG C) of solar energy
In the range of degree, collecting efficiency is very low, thus loses practical value.In face of the eager need of the middle temperature application (100~250 DEG C) of solar energy
Ask and energy-saving and environmental protection, the world trends of carbon drop, only develop the new cohesion that focusing ratio is higher, thermal-arrest thermal efficiency ratio is higher
Light vacuum tube solar heating element, could meet this demand, and meet energy-saving and environmental protection, the world trends of carbon drop.
The content of the invention
Present invention aim to apply the temperature model of (100~250 DEG C) in the middle temperature of solar energy for existing heat collector
In enclosing, collecting efficiency is very low, thus loses practical value etc. not enough there is provided optically focused in a kind of heated body glass tube involute surface
Vacuum tube solar heating element, it is within the temperature range of the middle temperature application (100~250 DEG C) of solar energy, and focusing ratio is higher, thermal-arrest
Thermal efficiency ratio is higher, with great practical value.
To achieve the above object, a kind of heated body glass tube involute surface internal focusing vacuum pipe involved in the present invention is too
It is provided with positive energy heat collector, including thermal-collecting tube, the thermal-collecting tube in heat pipe, the thermal-collecting tube and is additionally provided with reflector, the collection
Heat pipe is arranged in fixed plate, and collector pipe is provided with inside the fixed plate, and the heat pipe is connected with collector pipe；The thermal-collecting tube
It is vacuum state between heat pipe, the reflector is arranged on heat pipe side, so that the sunlight that reflector is received is rolled over
It is mapped on heat pipe.
Further, the cross section of the reflector is with the Φ of heat pipe0Based on circle involute, the number of involute
Learning equation is：
In x-y coordinate system：
X=a (cos t+t sin t)
Y=a (sin t-t cos t)
A is heat pipe basis circle Φ in formula0Radius,
Further, the fixed support for fixing heat pipe is additionally provided with the thermal-collecting tube.
Further, the heated pipe surface is provided with absorber coatings.
Further, the reflective plate surface is provided with reflective membrane.
Further, horizontal light leak baffle plate is additionally provided with the reflector, the horizontal light leak baffle plate setting is in reflector
Middle part.
Further, heat-insulation layer is additionally provided with the fixed plate, the collector pipe is arranged in heat-insulation layer.
As preference, the thermal-collecting tube is additionally provided with sealing ring with fixed plate junction.
As preference, the reflective membrane is reflective metal film.
As preference, the thermal-collecting tube, heat pipe, reflector, fixed support are glass material.
The advantage of the invention is that：
Optically focused heat pipe in involute reflector in thermal-collecting tube, can make sunshine by interior optically focused, with higher optically focused
Than reflecting and being condensed to heated pipe surface, expeditiously absorbed by selective absorber coatings, be converted into heat energy, it is specific in vacuum tube
Heat-retaining condition under, convert the solar into the heat energy of heated body glass tube reclaimed water, make superheated water, temperature reaches 100
~180 DEG C, when superheated water discharges, 100~180 DEG C of steam are converted into, 100 DEG C of boiling water (mark can have both been provided the user
Under quasi- atmospheric pressure), or user provides 100~180 DEG C of steam.
Brief description of the drawings
Fig. 1 is internal structure schematic diagram of the invention；
Fig. 2 is the internal structure schematic diagram at another visual angle of the invention；
Fig. 3 is heat pipe basis circle Φ0Involute to the reflection of incident ray and concentrating light principles figure；
Fig. 4 is Φ in embodiment100mmHeated body glass tube involute surface internal focusing vacuum tubular construction schematic diagram.
In figure：It is thermal-collecting tube 1, heat pipe 2, reflector 3, fixed plate 4, collector pipe 5, fixed support 6, absorber coatings 7, reflective
Film 8, horizontal light leak baffle plate 9, heat-insulation layer 10, sealing ring 11.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings：
A kind of heated body glass tube involute surface internal focusing vacuum tube solar heat-collecting device as shown in Fig. 1~2, bag
Include the fixed branch for being provided with and being additionally provided with heat pipe 2, the thermal-collecting tube 1 for fixing heat pipe 2 in thermal-collecting tube 1, the thermal-collecting tube 1
Frame 6.Reflector 3 is additionally provided with the thermal-collecting tube 1, the thermal-collecting tube 1 is arranged in fixed plate 4, the thermal-collecting tube 1 and fixed plate
4 junctions are additionally provided with sealing ring 11.The inside of fixed plate 4, which is provided with collector pipe 5, the fixed plate 4, is additionally provided with heat-insulation layer 10,
The collector pipe 5 is arranged in heat-insulation layer 10.The heat pipe 2 is connected with collector pipe 5；Between the thermal-collecting tube 1 and heat pipe 2
For vacuum state, the surface of reflector 3 is provided with reflective membrane 8.The reflective membrane 8 is reflective metal film.On the reflector 3 also
Provided with horizontal light leak baffle plate 9, the horizontal light leak baffle plate 9 is arranged on the middle part of reflector 3.The reflector 3 is arranged on heated
The side of pipe 2, so that the sunlight that reflector 3 is received is refracted on heat pipe 2.The surface of heat pipe 2 is provided with absorber coatings
7.The thermal-collecting tube 1, heat pipe 2, reflector 3, fixed support 6 are glass material.
The cross section of the reflector 3 is with the Φ of heat pipe 20Based on circle involute, the math equation of involute
Formula is：
In x-y coordinate system：
X=a (cos t+t sin t)
Y=a (sin t-t cos t)
A is the basis of heat pipe 2 circle Φ in formula0Radius,
The principle of the present invention：
Such as Fig. 3, using X-axis as AJ directions, Y-axis is AK directions resume plane right-angle coordinate：
The cross section of the reflector 3 is with the Φ of heat pipe 20Based on circle involute, the math equation of involute
Formula is：
In x-y coordinate system：
X=a (cos t+t sin t)
Y=a (sin t-t cos t)
A is the basis of heat pipe 2 circle Φ in formula0Radius,
T be on the involute of reflector 3 a point N (coordinate is xN,yN) arrive basis circle Φ0Tangent line point of contact Q formation circle half
Angle between footpath AQ and X-axis.
The mathematical characteristic of involute curve：
(coordinate is x to any point N on involute curveN,yN) the center of curvature be located at basis circle Φ0Circumference on.This is just
Determine that involute surface can be condensed to the optically focused characteristic on basic circle when reflective.Involute surface is designed and is processed into
For a curved surface with good light-reflecting property, by light is incident and principle of reflection, incident angle α1=reflection angle alpha2, it crosses N points
Normal is NQ, in basis circle Φ0With in the plane of its involute, incident ray is PN, and reflection light is NR, by involute curve
It is centrally located at basis circle Φ0Characteristic on circumference, reflection light NR necessarily falls on basis circle Φ0Circumference on.Namely sunshine
When line any angle above the involute is incided on involute surface, the equal converging light of its reflection light justifies Φ to basis0Circle
Zhou Shang, here it is the general principle of involute surface optically focused.
According to above concentrating light principles, by basis circle Φ0The external diameter of the heat pipe 2 of involute internal focusing vacuum pipe is designed as,
The cross section of reflector 3 should be the external diameter of heat pipe 2 circle gradually in then involute internal focusing vacuum pipe as shown in Figure 1, its thermal-collecting tube 1
Burst at the seams.When sunshine incides reflector 3, its reflection light necessarily falls on the outer surface of heat pipe 2, by the appearance of heat pipe 2
The solar energy hot-cast socket coating for selective absorption 7 in face is absorbed, and converts the solar into heat energy, make water in heat pipe 2 by
Heat heating, because focusing ratio is π, the solar heat that water body is received is more and forms superheated water, and temperature can reach 100~200
℃.When superheated water is released, vapor is converted into, the thermal source as the middle temperature application of solar energy.
The characteristics of involute surface internal focusing vacuum pipe：
1st, with relatively higher focusing ratio：
Calculating shows, the focusing ratio c=π of involute surface internal focusing vacuum pipe.
2nd, have in the middle temperature temperature limit of solar energy than relatively low infrared emission ratio：
Due to the outside diameter d of heat pipe 22With respect to cover glass bore D1It is much smaller, comparatively, heat pipe 2 have compared with
Small infrared emission area, has smaller infrared emission in (100~250 DEG C) of the temperature range of the middle temperature application of solar energy
Than, that is, the heat loss that heat emission is caused it is more much smaller than all-glass vacuum tube.
3rd, the collection thermal characteristics with vacuum tube：
3.1st, vacuum tube has the special excellent properties for suppressing heat transfer and thermal convection current；
3.2nd, vacuum tube can collect the solar radiation energy efficient rate with shortwave characteristic.
3.3rd, the solar selectively absorbing coating of the heated body pipe surface coating in vacuum tube can be by the incident sun
Heat energy can be efficiently converted into.
3 points of the above makes vacuum tube collector have the higher thermal-arrest thermal efficiency.
4th, heated body glass tube has the outside dimension more much smaller than cover glass pipe, so as to ensure more solar energy
The hot less heated body glass tube of heated dimensions parameter.Thus reach higher heating-up temperature.
The 5th, horizontal light leak baffle plate 9 is set：
Due to being provided with horizontal light leak baffle plate 9, both overcome the defect of the horizontal light leak of internal focusing vacuum pipe, solve again by
Heat bridge problem between heat pipe 2 and reflector 3.
In addition, it is common technique means in similar vacuum tube to be provided with getter in the present invention in thermal-collecting tube 1, repeat no more.This
Invention reaches that hot water rises using blind pipe structure, and hot water is sent in header tank by the gravity flow mode that cold water declines.
Embodiment：
Such as Fig. 4, the important technological parameters of the involute surface of heat pipe 2 and heat pipe 2 are as follows：
The external diameter of thermal-collecting tube 1：D2=100mm；The internal diameter of thermal-collecting tube 1：D1=95mm；The wall thickness of thermal-collecting tube 1：σ1=2.5mm；It is heated
The external diameter of pipe 2：d2=30mm；The internal diameter of heat pipe 2：d1=27mm；The wall thickness of heat pipe 2：σ2=1.5mm；The thickness of reflector 3：σ2=
0.35mm；The Inner of reflector 3 is wide wide：MM '=D1-2σ3=95-2 × 0.35=94.3mm.
Involute equation formula and associated technical parameters：
Basic circular diameter：φ0=d2=30.00mm；Basic radius of circle：
Involute equation formula：
In x-y coordinate system：X=a (cost+tsint)；Y=a (sint-tcost)
T is the corresponding angle of osculations (radian value) of a point N on involute in formula.
M point coordinates is：
Involute BVNM and its symmetrical curve BV ' N ' M ' is the curve drawn by above-mentioned involute equation formula.Involute is bent
The cross section Inner profiles shape of face reflector 3 meets the curve with size.N points are any point on involute BVMN curves.
Calculating on focusing ratio c values：
When t=180 ° of angle, A/F MM '=b between double involute.
In formulatM=180 °=π radians (correspondence M points)
It is computed b=2a (sintM-tMcostM)=94.3mm.
In fact, the width that thermal-collecting tube 1 receives sunshine is double involute width MM '=b=94.3mm, basic circular diameter
Φ0=30mm, that is, the outside diameter d of heat pipe 22。
Calculate the focusing ratio c values of the thermal-collecting tube 1：
On operating temperature be 100 DEG C when the thermal-arrest thermal efficiency：
Compared with the common glass vacuum pipe heat collector of same specification, the focusing ratio c of light-gathering heat collection pipe 1 in involute surface
=π.The diameter dimension parameter of heat pipe 2 is smaller, and the surface area of heat pipe 2 is smaller, and the infra-red radiation of heat pipe 2 is smaller.100
In operating temperature more than DEG C, infra-red radiation is directly proportional to the biquadratic of absolute temperature, is the every heat waste at work of thermal-collecting tube 1
The project of most serious is lost, it is very big for thermal-arrest thermal efficiency influence of the thermal-collecting tube 1 under the conditions of compared with elevated operating temperature.Due to involute
Interior light-gathering heat collection pipe 1 is compared with all-glass vacuum tube, with less infrared emission, thus with the higher thermal-arrest thermal efficiency.
Calculating shows, in t=140 DEG C of thermal-arrest operating temperature, the dynamic thermal-arrest thermal efficiency of the thermal-collecting tube 1 (contains header, water
Vapour conveys heat loss) be：ηd=0.4081, it is more than 2 times of the same specification glass vacuum pipe heat collector thermal-arrest thermal efficiency.
It can be seen that the thermal-collecting tube 1 can be operated at 100~180 DEG C, 100 DEG C of (one, boiling water can have both been provided the user
Normal atmosphere is depressed), or user provides 100~180 DEG C of steam.
Boiling water or the output of steam on embodiment：
The vacuum tube specification of embodiment is
φ × σ × l=φ 100 × 2.5 × 2100 (mm)
The vacuum tube chain number of columns N of veneer heat collector, takes dense arrangement.On 2000mm width, 19 vacuum are arranged
Pipe.
N=19 (root) (end carries necking down structure, is easy to dense arrangement)
The effective daylighting area S of veneer heat collector：
S=D2LN=0.1 × 2 × 19=3.8m2
Standard intensity of solar radiation Ea：
Ea=800w/m2
Hot water enthalpy h at 100 DEG CWater 100：
hWater 100=(100-20)=80Kcal/kg=334.4KJ/kg
(set natural temperature ta=20 DEG C)
The enthalpy h of steam at 140 DEG CVapour 140：
hVapour 140=3676KJ/kg
Heat collector dynamic thermal-arrest thermal efficiency η at 100 DEG Cd100：ηd100=0.4419
Heat collector dynamic thermal-arrest thermal efficiency η at 140 DEG Cd140：ηd140=0.4081
Heat collector conveying heat Q during t=100 DEG C of evaluation work temperature100：
Heat collector conveying heat Q during t=140 DEG C of evaluation work temperature140：
Calculate the yield of boiling water per hour G when veneer operating temperature is t=100 DEG CWater：
Calculate the steam production G per hour when veneer operating temperature is t=140 DEG CVapour：
Calculate the yield of boiling water per hour G when 10 pieces of collecting plate operating temperatures are t=100 DEG CWater 10：
GWater 10=10 × GWater=10 × 14.5=145kg/h
Calculate the collecting plate quantity n of (t=140 DEG C) needs of production 100kg steam per hour：
That is 10 plates, it is G that 100 DEG C of boiling water (a normal atmosphere pressure) amount can be produced per hourWater 100=145kg/h.
60 plates can produce 140 DEG C of quantity of steams per hour：GVapour 140=100kg/h.
Finally it is pointed out that above example is only the more representational example of the present invention.It is clear that the invention is not restricted to
Above-described embodiment, can also there is many deformations.All technical spirits according to the present invention are to made for any of the above embodiments any simple
Modification, equivalent variations and modification, are considered as belonging to protection scope of the present invention.
Claims (10)
1. a kind of heated body glass tube involute surface internal focusing vacuum tube solar heat-collecting device, it is characterised in that：Including thermal-arrest
Manage (1), be provided with the thermal-collecting tube (1) in heat pipe (2), the thermal-collecting tube (1) and be additionally provided with reflector (3), the thermal-collecting tube
(1) it is arranged in fixed plate (4), collector pipe (5), the heat pipe (2) and collector pipe (5) is provided with inside the fixed plate (4)
Connection；
It is vacuum state between the thermal-collecting tube (1) and heat pipe (2), the reflector (3) is arranged on heat pipe (2) side,
So as to which the sunlight for receiving reflector (3) is refracted on heat pipe (2).
2. a kind of heated body glass tube involute surface internal focusing vacuum tube solar heat-collecting device according to claim 1,
It is characterized in that：The cross section of the reflector (3) is with the Φ of heat pipe (2)0Based on circle involute, the number of involute
Learning equation is：
In x-y coordinate system：
X=a (cost+tsint)
Y=a (sint-tcost)
A is heat pipe (2) basis circle Φ in formula0Radius,
3. a kind of heated body glass tube involute surface internal focusing vacuum tube solar heat-collecting device according to claim 2,
It is characterized in that：The fixed support (6) for fixing heat pipe (2) is additionally provided with the thermal-collecting tube (1).
4. a kind of heated body glass tube involute surface internal focusing vacuum tube solar heat-collecting device according to claim 3,
It is characterized in that：Heat pipe (2) surface is provided with absorber coatings (7).
5. a kind of heated body glass tube involute surface internal focusing vacuum tube solar heat-collecting device according to claim 4,
It is characterized in that：Reflector (3) surface is provided with reflective membrane (8).
6. a kind of heated body glass tube involute surface internal focusing vacuum tube solar heat-collecting according to claim 5
Device, it is characterised in that：Horizontal light leak baffle plate (9) is additionally provided with the reflector (3), the horizontal light leak baffle plate (9) is arranged on
The middle part of reflector (3).
7. a kind of heated body glass tube involute surface internal focusing vacuum pipe according to any one in claim 1~6
Solar thermal collector, it is characterised in that：Heat-insulation layer (10) is additionally provided with the fixed plate (4), the collector pipe (5) is arranged on guarantor
In warm layer (10).
8. a kind of heated body glass tube involute surface internal focusing vacuum tube solar heat-collecting device according to claim 7,
It is characterized in that：The thermal-collecting tube (1) is additionally provided with sealing ring (11) with fixed plate (4) junction.
9. a kind of heated body glass tube involute surface internal focusing vacuum tube solar heat-collecting device according to claim 8,
It is characterized in that：The reflective membrane (8) is reflective metal film.
10. a kind of heated body glass tube involute surface internal focusing vacuum tube solar heat-collecting device according to claim 9,
It is characterized in that：The thermal-collecting tube (1), heat pipe (2), reflector (3), fixed support (6) are glass material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710397946.XA CN107202438A (en) | 2017-05-31 | 2017-05-31 | A kind of heated body glass tube involute surface internal focusing vacuum tube solar heat-collecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710397946.XA CN107202438A (en) | 2017-05-31 | 2017-05-31 | A kind of heated body glass tube involute surface internal focusing vacuum tube solar heat-collecting device |
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| Publication Number | Publication Date |
|---|---|
| CN107202438A true CN107202438A (en) | 2017-09-26 |
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ID=59906960
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|---|---|---|---|
| CN201710397946.XA Pending CN107202438A (en) | 2017-05-31 | 2017-05-31 | A kind of heated body glass tube involute surface internal focusing vacuum tube solar heat-collecting device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6078251A (en) * | 1983-10-04 | 1985-05-02 | Hitachi Chem Co Ltd | Heat absorber structure of vacuum tube type solar heat collector |
| CN2380869Y (en) * | 1999-04-29 | 2000-05-31 | 陈格瑜 | Solar heat-absorbing apparatus |
| CN2516904Y (en) * | 2001-07-18 | 2002-10-16 | 杨国富 | Solar mirror reflection compound parabolic heat collector |
| CN2655120Y (en) * | 2003-10-23 | 2004-11-10 | 徐鸿胜 | Multipurpose solar water heater |
| CN203274301U (en) * | 2013-05-07 | 2013-11-06 | 中国科学院广州能源研究所 | Inner spotlight heat pipe type evacuated solar collector tube |
| CN103712357A (en) * | 2013-12-30 | 2014-04-09 | 南京诚远太阳能科技有限公司 | Heat pipe using solar energy to achieve vacuum light condensation |
-
2017
- 2017-05-31 CN CN201710397946.XA patent/CN107202438A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6078251A (en) * | 1983-10-04 | 1985-05-02 | Hitachi Chem Co Ltd | Heat absorber structure of vacuum tube type solar heat collector |
| CN2380869Y (en) * | 1999-04-29 | 2000-05-31 | 陈格瑜 | Solar heat-absorbing apparatus |
| CN2516904Y (en) * | 2001-07-18 | 2002-10-16 | 杨国富 | Solar mirror reflection compound parabolic heat collector |
| CN2655120Y (en) * | 2003-10-23 | 2004-11-10 | 徐鸿胜 | Multipurpose solar water heater |
| CN203274301U (en) * | 2013-05-07 | 2013-11-06 | 中国科学院广州能源研究所 | Inner spotlight heat pipe type evacuated solar collector tube |
| CN103712357A (en) * | 2013-12-30 | 2014-04-09 | 南京诚远太阳能科技有限公司 | Heat pipe using solar energy to achieve vacuum light condensation |
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Application publication date: 20170926 |