CN202494554U - Wall-rooftop solar chimney experiment apparatus - Google Patents

Wall-rooftop solar chimney experiment apparatus Download PDF

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Publication number
CN202494554U
CN202494554U CN2012200890495U CN201220089049U CN202494554U CN 202494554 U CN202494554 U CN 202494554U CN 2012200890495 U CN2012200890495 U CN 2012200890495U CN 201220089049 U CN201220089049 U CN 201220089049U CN 202494554 U CN202494554 U CN 202494554U
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China
Prior art keywords
wall
section
chimney
solar chimney
pipeline section
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Withdrawn - After Issue
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CN2012200890495U
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Chinese (zh)
Inventor
李炎锋
王代兵
边江
张泽园
吴竟熙
王慧琛
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Beijing University of Technology
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Beijing University of Technology
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Abstract

The utility model relates to a wall-rooftop solar chimney experiment apparatus and relates to the field of a solar chimney and natural ventilation. The apparatus comprises a model room (10) and the solar chimney, wherein one side opening of the model room (10) is communicated with a channel of the solar chimney, the other side of the model room (10) is provided with an air inlet (24), the model room (10) is internally provided with a smoke-generation apparatus (9), the solar chimney is composed of a vertical section pipe and an inclined section pipe, the vertical section pipe comprises a vertical section heating wall (6), a vertical section side wall(7), flange slots (8) and a movable wall (11), two sides of the vertical section heating wall (6) are fixedly connected with two vertical section side walls (7), three flange slots (8) are arranged on opposite faces of the two vertical section side walls (7), the movable wall (11) is inserted into anyone of the three flange slots (8) to form a closed chimney environment with no cross section. The apparatus is provided with a width adjusting apparatus for width adjustment of the solar chimney, and thereby ventilation effects of the solar chimney at different widths can be simulated.

Description

Wall-roof type solar chimney experimental provision
Technical field
The utility model designs a kind of solar chimney experimental provision; Especially relate to wall-roof type solar chimney experimental provision; Can analyze the device of influence in flow field, velocity field and the temperature field of solar chimney through changing physical dimension, angle and hot-fluid size, the utility model relates to solar chimney and natural ventilation field.
Background technology
Solar chimney is to increase chimney internal-external temperature difference, increase buoyancy effect through absorbing solar radiant heat, and the final increase room ventilation air quantity of realizing is to reduce the constructional device of room temperature purpose.
The solar chimney experimental study starts from the 1950's, and the researcher has carried out a large amount of experiments and numerical simulation study to solar chimney both at home and abroad.The more solar chimney version of research has at present: Trombe wall-body structure, vertical thermal-arrest plate roof type structure, inclination thermal-arrest plate roof type structure, the solar chimney structure of wall-roof type etc.At present, the researcher mainly concentrates on Trombe wall-body structure to studying both at home and abroad, vertical thermal-arrest plate roof type structure, inclination thermal-arrest plate roof type structure solar chimney form.
Research solar chimney research characteristic mainly adopts the method for theoretical analysis, method for numerical simulation and experimental study.
Aspect the theory analysis, Ong etc. (2003) study Trombe wall-body structure, on the basis of the thermal conduction resistance of ignoring glass cover-plate and thermal-arrest wall, have set up a thermal balance equation by the air in glass cover-plate, thermal-arrest wall and the chimney.Zhai Xiaoqiang, Wang Ruzhu (2010) have derived with lumped-parameter method and have found the solution the MAF formula that Trombe wall formula solar chimney is induced, and have carried out analyzing relatively to several kinds of different situations.Aboulnaga (2006) adopts theoretical analysis method research roof type structure solar chimney induced air amount.
Numerical simulation means is used widely in solar chimney research; People such as Liping Wang (2003) Zhao Pingge (2004) is to Trombe wall-body solar chimney; Sun Meng (2006) etc. adopt numerical simulation solar chimney enhanced natural ventilating to vertical thermal-arrest plate roof type solar chimney, and research result of calculation shows that what influence the ventilation of room effect mainly is solar radiation energy, environment temperature and stack cross section height.
All in all, relevant solar chimney theoretical analysis mainly is to launch around Trombe wall-body solar chimney, and a lot of simplification hypothesis have been adopted in research, just under certain precondition, are suitable for.The Along with computer technology development, numerical simulation technology is generally adopted, but the The results of numerical simulation accuracy must be verified with experimental data.Therefore, experimental technique is to study the solar chimney characteristic and structure is used for the actual important means of engineering.
The experimental study of relevant solar chimney mainly comprises salt solution experimental analogic method, gas simulation and water model systems approach, scale model experimental technique, full-scale test method, tracer gas technique and bubble hydrogen method.
The salt water analog is accepted at present widely, and is applied to a lot of research aspects.But its shortcoming is cistern that need be bigger and must constantly replenishes salt solution, and necessary reversing BUILDINGS MODELS, the experimental provision more complicated.And the situation of gas simulation and water model system simulating nature ventilation accurately, but when simulation, each similar factor is tallied with the actual situation, this is difficult to reach under actual conditions.
Aspect experimental study, to Trombe wall-body structure solar chimney, Bouchair (1994) has carried out very complete research to a full-scale chimney under laboratory condition.Jing Haiwei (2005), Hao Caixia (2006) adopt highly being 2000mm, and length is the research that experimentizes of 1000 vertical thermal-arrest plate roof type solar chimney.
About inclination thermal-arrest plate roof type structure solar chimney, people such as Chen (2003) research inclination thermal-arrest plate roof type structure solar chimney has been observed in the solar chimney thermal behavior during with five different heat flow densities at four different chimneys inclination angles.Lelan (2003) adopts experiment and CFD simulation means to study.People (2008) such as Ramadan Bassiouny have carried out theoretical analysis research to the angle of inclination of solar chimney and the relation of ventilation effect.
About wall-roof type solar chimney, Aboulnaga (2006) adopts theoretical analysis method research wall-roof type structure solar chimney induced air amount.Yang Qirong (2010) is provided with vertically and the series-connected solar chimney that tilts along the roof at its southern exterior wall and south orientation roof, and its performance of ventilating is studied to two layers of villa in area, Guangzhou.
Spencer (2001), the auspicious tinkling of pieces of jade of Duanmu (2007) utilizes the thermal behavior of bubble technical modelling vertical thermal-arrest plate-type solar chimney and Trombe wall-body solar chimney, has obtained chimney import and relation of height.But the shortcoming of this method be can not the simulant building thermal characteristics to natural ventilation effect.
Comprehensively given to the world the result of one's studies and can find, research at present mainly concentrates on Trombe wall-body structure solar chimney, vertically thermal-arrest plate roof type and inclination thermal-arrest plate roof type roof type chimney.Absorption and convection heat transfer The Characteristic Study that present in addition research focuses mostly on and improves solar radiant heat in how; And it is less for the Research on Optimal Design of chimney itself; And the data that can be used in engineering design is few, therefore is necessary carrying out intensive research.
Though existing research (Zhai Xiaoqiang, Wang Ruzhu,, Aboulnaga, in 2003 in 2006) shows that wall-roof type solar chimney can improve natural ventilation rate greatly.But lack relevant experimental study data.Therefore, need build scale model experiment table or full-scale experiment platform, carry out wall-roof type solar chimney ventilation effect research.Physical dimension, degree of tilt and the hot-fluid size of research " wall-roof " formula solar chimney is to the situation that influences in flow field, velocity field and the temperature field of solar chimney.
At present; The patent of domestic relevant solar chimney concentrates on solar chimney arrangement [application number: 94190117.3]; Solar thermal collector [application number: 200110092150.4] generating etc.; Fundamental purpose utilizes heating air flow to do useful work, is used for solar heat exchange, and provides and convert sun power into the electric energy method.Also there is not to occur the related patent U.S. Patent No. of " wall-roof " formula solar chimney device at present.
The utility model content
Problem for the Related Experimental Study data deficiency that solves wall-roof type solar chimney; A kind of convenient, flexible wall-roof type solar chimney experimental provision is provided; Vertical thermal-arrest plate roof type structure solar chimney and inclination thermal-arrest plate roof type structure solar chimney are combined, filled up the blank that existing experimental provision can't be studied wall-roof type solar chimney.It can be used to study physical dimension, degree of tilt and the hot-fluid size of the wall-roof type solar chimney situation that influences to flow field, velocity field and the temperature field of solar chimney.
To achieve these goals, the utility model has been taked following technical scheme:
Wall-roof type solar chimney experimental provision, it comprises between model room 10 and solar chimney, and a side opening of 10 links to each other with the passage of solar chimney between model room, and opposite side has air inlet 24, is built-in with smoking device 9; Described solar chimney is made up of vertical section pipeline section and tilting section pipeline section; Described vertical section pipeline section is made up of vertical section heated wall 6, vertical section sidewall 7, flange groove 8 and removable wall 11, and vertically section heated wall 6 both sides are connected with vertical section sidewall 7; Both sides vertically section sidewall 7 opposite faces are provided with 3 flange grooves 8, and removable wall 11 inserts any of three flange grooves, constitute the sealing chimney environment of no transversal section; Vertically section heated wall 6 is made up of aluminium sheet 13, thermopair 14, heating plate 15, polyethylene 16; Adhere to thermal-arrest version plate 15 on the aluminium sheet 13; Evenly be provided with thermopair 14 on the heating plate 15, heater plate surface is arranged polyethylene 16 again, and polyethylene 16 is positioned at the chimney outside; Described inclination pipeline section is made up of tilting section heated wall 1, tilting section sidewall 2, flange groove 8, removable wall 11; Inclination pipeline section constituted mode is identical with vertical pipeline section with composition material, and promptly tilting section heated wall 1 both sides are connected with tilting section sidewall 2; Both sides tilting section sidewall 2 opposite faces are provided with 3 flange grooves 8, and removable wall 11 inserts any of three flange grooves, constitute the sealing chimney environment of no transversal section; Tilting section heated wall 1 is made up of aluminium sheet 13, thermopair 14, heating plate 15, polyethylene 16; Adhere to thermal-arrest plate 15 on the aluminium sheet 13; Evenly be provided with thermopair 14 on the heating plate 15, heater plate surface is arranged polyethylene 16 again, and polyethylene 16 is positioned at the chimney outside; Tilting section is fixed between model room on 10 through rear support stand 3; The sector 4 that the sidewall of two sections chimneys passes through connects, and two heated wall are tightly connected with the asbeston 5 of a thermal insulation, the angle of regulating the inclination pipeline section through the angle and the length of adjustment rear support stand of changing sector 4.
10 are surrounded by transparent wall between described model room.
Described flange groove 8 notches are identical with moving end-wall 11 thickness, and after the inclination pipeline section installed with vertical pipeline section, the flange notch of two pipeline sections just in time docked.
Said insertion is as a whole " L " shape of removable wall 11 of section pipeline section and tilting section pipeline section vertically; Described removable wall 11 inserts from the flange notch of inclination pipeline section, and the flange groove that can directly be inserted to vertical pipeline section is terminal; When changing the chimney width, from former flange groove, extract moving end-wall out insertion required flange groove.
The angle of described sector 4 comprises 30 °, 45 °, and 60 °.
Described vertical section thermopair 14 links to each other with power supply 17, slide rheostat 18, voltage table 19, reometer 20, and slide rheostat 18, voltage table 19, reometer 20 adopt external mode to insert, and place 10 outsides between model room.The slide rheostat II 21 that links to each other with tilting section thermopair 14, voltage Table II 22, electric current Table II 23 are also put 10 outsides between model room.Adjust size through adjustment slide rheostat 18, the thermal value of control thermopair through electric current in the circuit.
Compare with existing correlation technique, this experimental provision has the following advantages:
1, this device will can be simulated the air flow situation of true wall-roof integral solar energy chimney structure through tilting section and vertical section solar chimney being set and integrating.
2, this device is connected at the sidewall of vertically section and two sections chimneys of the tilting section sector through an angle (30 °, 45 ° with 60 °); Through adopting different radian sectors to come adjusting angle, thereby can simulate the ventilation situation of solar chimney under the different angles.
3, this device is provided with width adjusting device and regulates the solar chimney width, thereby can simulate the ventilation effect of solar chimney under the different in width.
4, this device can be regulated heat flow density through the heat flow density regulating device; Thereby the surface that can simulate solar chimney under different incidence angles degree, different latitude area, the different weather conditions obtains the heat flow density situation, and then studies the ventilation effect of solar chimney under the following different operating modes.
5, this device is can the simulated experiment scope big.Can make up each other for different angles, width and heat flow density according to demand.Be combined into different experimental situations, simulation experimentizes.
Description of drawings
Fig. 1 experimental provision synoptic diagram;
Fig. 2 experimental provision sectional view
Fig. 3 is section chimney structure figure vertically;
Fig. 4 heated wall structural representation;
The connected mode of Fig. 5 vertical plane electrical heating wall;
The connected mode of Fig. 6 dip plane electrical heating wall;
The arrangenent diagram of the inboard thermopair of Fig. 7 vertical plane;
The arrangenent diagram of the inboard thermopair in Fig. 8 dip plane;
Among the figure: 1, tilting section heated wall, 2, the tilting section sidewall, 3, rear support stand, 4, sector, 5, asbeston; 6, vertical section heated wall, 7, vertical section sidewall, 8, flange groove, 9, smoking device, 10, between model room; 11, removable wall, 12, the chimney import, 13, aluminium sheet, 14, thermopair, 15, heating plate; 16, polyethylene, 17, power supply, 18, slide rheostat, 19, voltage table, 20, reometer; 21, slide rheostat II, 22, the voltage Table II, 23, the electric current Table II, 24, air inlet.
Embodiment
The experiment table embodiment is explained through three specific embodiments:
Embodiment one: simulation angle of inclination, dip plane is to the influence of solar chimney internal speed field, temperature field and natural ventilation rate.
As shown in Figure 1, the long 1m of experiment table casing, wide 1m; High 1.1m; Solar chimney is formed by connecting with vertical section two sections tilting section, and every section chimney is made up of two sidewalls (tilting section sidewall 2 and vertical section sidewall 7), a heated wall (tilting section heated wall 1 and vertical section heated wall 6) and a mobile wall 11, wherein dip plane height 0.5m; Vertical plane height 1m, length is 1m; Chimney import 12 length 1m, width 0.1m.The sidewall of two sections chimneys is connected through the sector 4 of an angle (30 °, 45 ° with 60 °) respectively; Two heated wall are tightly connected with the asbeston 5 of a thermal insulation; Moving end-wall 11 is a monoblock thin aluminum sheet, and flange groove 8 insertions along sidewall connect together two sections chimneys.Position through changing moving end-wall changes chimney width (0.1m, 0.2m and 0.3m).
This experiment table utilizes the electric hot plate (as shown in Figure 3) on the heated wall to provide respectively that vertical heating wall is needed decides hot-fluid q 1, the inclination heating wall is required decides hot-fluid q 2The layout of heating plate such as Fig. 4, shown in Figure 5; Add a variable autotransformer (slide rheostat 18 and slide rheostat II 21) at the power supply place; Change the heating plate heat flow density through changing supply voltage, the size of voltage and current is measured through corresponding instrument (voltage table 19, reometer 20, voltage Table II 22, electric current Table II 23).This experiment table is through being bonded at the temperature of measuring heating wall on the aluminium sheet 13 with thermocouple 14, the layout of its measuring point such as Fig. 6, shown in Figure 7, and the lead of thermocouple is drawn along side wall surface, links to each other with data collecting instrument.Arrange three thermopairs in the back of heating plate in the center line equal intervals in addition, to be used for the heat of estimated loss.The measurement of spatial point temperature is that eight thermopairs are arranged on the iron wire in the passage, so once can measure eight points simultaneously.The measurement of speed uses hot-wire anemometer that position corresponding in the chimney is measured one by one.
According to the scene of required simulation,, configure required chimney width through confirming the position of moving end-wall 11 residing flange grooves 8; Configure the heat flow density of vertical heating wall 6 through standardsizing rheostat 18; Configure the heat flow density of inclination heating wall 1 through standardsizing rheostat 21.30 ° of sectors 4 are fit into experimental provision, connect vertical wall and inclined wall.And corresponding adjustable support frame 3, make its tight connection.
Smoking device 9 is placed on test casing 10 centers.Thermopair 13 is connected with the temperature acquisition instrument; Wind speed measuring device is placed on required measuring position (being generally each state point in the air channel); Last energized 17 begins air in the experimental provision is heated and begin the measurement of temperature and wind speed, treats to cut off the electricity supply after wind speed and temperature reach relatively stable two minutes and closes smoking device 9, treats that the interior flue gas of device discharges fully and install after interior operating mode returns to original state; Changing sector 4 is 45 ° and 60 °, repeats said process.
Embodiment two: the simulation different in width is to the influence of solar chimney internal speed field, temperature field and natural ventilation rate.The structure of equipment therefor is identical with the structure of device among the embodiment 1.
According to the scene of required simulation, configure the heat flow density of vertical heating wall 6 through standardsizing rheostat 18; Configure the heat flow density of inclination heating wall 1 through standardsizing rheostat 21; Through confirming the size of sector 4, configure dip plane inclination size.Moving end-wall 11 is installed in the position of No. 8 notches of flange groove, accomplishes the setting of chimney width.
Smoking device 9 is placed on test casing 10 centers.Thermopair 13 is connected with the temperature acquisition instrument; Wind speed measuring device is placed on required measuring position (being generally each state point in the air channel); Last energized 17 begins air in the experimental provision is heated and begin the measurement of temperature and wind speed, treats to cut off the electricity supply after wind speed and temperature reach relatively stable two minutes and closes smoking device 9, treats that the interior flue gas of device discharges fully and install after interior operating mode returns to original state; Change the position of moving end-wall 11 flange grooves 8 of living in; Repeat said process, this experimental provision is provided with three notches, respectively 0.1m, 0.2m and the 0.3m of corresponding chimney width.
Embodiment three: simulate the influence of different heat flow densities to solar chimney internal speed field, temperature field and natural ventilation rate.The structure of equipment therefor is identical with the structure of device among the embodiment 1.
According to the scene of required simulation,, configure dip plane inclination size through confirming the size of sector 4; Through confirming the position of moving end-wall 11 residing flange grooves 8, configure required chimney width.
The method of attachment (like Fig. 4, shown in Figure 5) of regulating electric boiling plate in the chimney according to the heat flow density of required measurement is to reach rough heating power.Regulating the resistance of the slide rheostat 18,21 of external circuit sets to reach more accurate heating power.
Smoking device 9 is placed on test casing 10 centers.Thermopair 13 is connected with the temperature acquisition instrument; Wind speed measuring device is placed on required measuring position (being generally each state point in the air channel); Last energized 17 begins air in the experimental provision is heated and begins the measurement of temperature and wind speed; Treat to cut off the electricity supply after wind speed and temperature reach relatively stable two minutes and close smoking device 9; After treating that operating mode returns to original state in flue gas is discharged fully and installed in the device, thereby change the connected mode of electric boiling plate in the chimney or the resistance of slide rheostat 18,21 changes heat flow density, repeat said process.

Claims (6)

1. wall-roof type solar chimney experimental provision; It is characterized in that: it comprises (10) and solar chimney between model room; One side opening of (10) links to each other with the passage of solar chimney between model room, and opposite side has air inlet (24), is built-in with smoking device (9); Described solar chimney is made up of vertical section pipeline section and tilting section pipeline section; Described vertical section pipeline section is made up of vertical section heated wall (6), vertical section sidewall (7), flange groove (8) and removable wall (11), and vertically section heated wall (6) both sides are connected with vertical section sidewall (7); Both sides vertically are provided with (3) individual flange groove (8) on section sidewall (7) opposite face, and removable wall (11) inserts any of three flange grooves, constitute the sealing chimney environment of no transversal section; Vertically section heated wall (6) is made up of aluminium sheet (13), thermopair (14), heating plate (15), polyethylene (16): adhere to thermal-arrest version plate (15) on the aluminium sheet (13); Evenly be provided with thermopair (14) on the heating plate (15); Heater plate surface is arranged polyethylene (16) again, and polyethylene (16) is positioned at the chimney outside; Described inclination pipeline section is made up of tilting section heated wall (1), tilting section sidewall (2), flange groove (8), removable wall (11); Inclination pipeline section constituted mode is identical with vertical pipeline section with composition material, and promptly tilting section heated wall (1) both sides are connected with tilting section sidewall (2); Be provided with (3) individual flange groove (8) on both sides tilting section sidewalls (2) opposite face, removable wall (11) inserts any of three flange grooves, constitutes the sealing chimney environment of no transversal section; Tilting section heated wall (1) is made up of aluminium sheet (13), thermopair (14), heating plate (15), polyethylene (16): adhere to thermal-arrest plate (15) on the aluminium sheet (13); Evenly be provided with thermopair (14) on the heating plate (15); Heater plate surface is arranged polyethylene (16) again, and polyethylene (16) is positioned at the chimney outside; Tilting section is fixed between model room on (10) through rear support stand (3); The sector that the sidewall of two sections chimneys passes through (4) connects, and two heated wall are tightly connected with the asbeston (5) of a thermal insulation, the angle of regulating the inclination pipeline section through the angle and the length of adjustment rear support stand of changing sector (4).
2. wall according to claim 1-roof type solar chimney experimental provision, it is characterized in that: (10) are surrounded by transparent wall between described model room.
3. wall according to claim 1-roof type solar chimney experimental provision is characterized in that: described flange groove (8) notch is identical with moving end-wall (11) thickness, and the inclination pipeline section of installation just in time docks with the flange notch of vertical pipeline section.
4. wall according to claim 1-roof type solar chimney experimental provision is characterized in that: as a whole " L " shape of removable wall (11) of said insertion vertical section pipeline section and tilting section pipeline section; Described removable wall (11) inserts from the flange notch of inclination pipeline section, and the flange groove that can directly be inserted to vertical pipeline section is terminal; When changing the chimney width, from former flange groove, extract moving end-wall out insertion required flange groove.
5. wall according to claim 1-roof type solar chimney experimental provision is characterized in that: the angle of described sector (4) comprises 30 °, 45 °, and 60 °.
6. wall according to claim 1-roof type solar chimney experimental provision; It is characterized in that: described vertical section thermopair (14) links to each other with power supply (17), slide rheostat (18), voltage table (19), reometer (20); Slide rheostat (18), voltage table (19), reometer (20) adopt external mode to insert, and place (10) outside between model room; The slide rheostat II (21) that links to each other with tilting section thermopair (14), voltage Table II (22), electric current Table II (23) are also put (10) outside between model room; Adjust size through adjustment slide rheostat (18), the thermal value of control thermopair through electric current in the circuit.
CN2012200890495U 2012-03-12 2012-03-12 Wall-rooftop solar chimney experiment apparatus Withdrawn - After Issue CN202494554U (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102607794A (en) * 2012-03-09 2012-07-25 北京工业大学 Wall-roof type solar chimney experimental device
CN111896212A (en) * 2020-08-04 2020-11-06 四川新希望六和农牧有限公司 Method and device for detecting ventilation effect of livestock house

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102607794A (en) * 2012-03-09 2012-07-25 北京工业大学 Wall-roof type solar chimney experimental device
CN102607794B (en) * 2012-03-09 2014-10-29 北京工业大学 Wall-roof type solar chimney experimental device
CN111896212A (en) * 2020-08-04 2020-11-06 四川新希望六和农牧有限公司 Method and device for detecting ventilation effect of livestock house
CN111896212B (en) * 2020-08-04 2022-06-07 四川新希望六和农牧有限公司 Method and device for detecting ventilation effect of livestock house

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Granted publication date: 20121017

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