CN105929280A - Closed type simulation detection system and detection method of industrial thermal radiation thermoelectric conversion efficiency - Google Patents
Closed type simulation detection system and detection method of industrial thermal radiation thermoelectric conversion efficiency Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention discloses a closed type simulation detection system and detection method of industrial thermal radiation thermoelectric conversion efficiency and belongs to the thermoelectric conversion detection field. The closed type simulation detection system of the industrial thermal radiation thermoelectric conversion efficiency of the invention includes a heat radiation module, a thermoelectric conversion module and a power detection module; the heat radiation module simulates a high-temperature heat source and is used for radiating heat to the outside; a hollow firebrick is arranged in the heat radiation module; the thermoelectric conversion module is arranged at the upper opening of the hollow firebrick; a thermoelectric power generation assembly in the thermoelectric conversion module converts absorbed heat into electric energy; and the power detection module is electrically connected with the thermoelectric conversion module and is used for detecting generated power. The closed type simulation detection system can be utilized to simulate thermoelectric conversion of industrial production, so that adjustment can be carried out conveniently according to theoretical calculation. The closed type simulation detection system and the detection method are of great guiding significance for the installation of an industrial thermoelectric conversion device.
Description
Technical field
The present invention relates to thermoelectric conversion detection technique field, more particularly, it relates to a kind of industry heat radiation thermoelectric conversion efficiency
Closed simulation detection system and detection method.
Background technology
Along with developing rapidly of social modernization, energy scarcity and CO2 emission problem become more acute, even become restriction ground
The bottleneck of district's development.Therefore, seek high efficiency, free of contamination energy source secondary utilizes and the method for energy regenerating conversion becomes solution
The effective way of current energy science problem.China is world energy consumption big country, energy supply the most in short supply and CO2 discharge
Seriously govern China's economic development.Therefore, the energy utilization technology in the urgent need to Development of Novel is imitated to save the energy and raising
Rate.Steel industry is one of two big energy-intensive industries, creates substantial amounts of radiant heat, account for heat waste in its production process
The 10-25% lost is the most.This not only causes the waste of the energy, also brings environmental pollution and safety problem simultaneously.Due to
The complexity of steel industry technique process, carries out its hyperthermia radiation heat recycling seldom at present.Thermoelectric generation is in industry
Radiation residual heat thermoelectric power generation has important application prospect.
In casting process, the most domestic in addition to the continuous casting and rolling of Large Steel enterprise, major part steel is looked forward to that continuous casting steel embryo not yet carries out heat and is returned
Receiving, high-temperature residual heat is directly released in air；Owing to this partial heat is relatively big, as a example by four machines four flow 150 × 150 billet continuous castings,
Hour thermic load reaches about 9000kW, the most not only causes great energy waste, and makes the work around conticaster
Ecological deterioration, have impact on the health of workman.In order to carry out waste heat recovery further, start in industry to consider how billet residual heat
Converting, and allow the substantial amounts of flue gas of continuous casting steel billet, steam preheating be reclaimed in a large number, mostly traditional mode is to utilize water
Circulation carries out heat exchange, but this exchanged form self also causes substantial amounts of energy loss, and transformation efficiency is low.By high-temperature residual heat
Thermo-electric generation, and test thermal-radiating utilization rate accurately and generating efficiency relation then seems most important.
Such as China Patent No.: ZL2014201159186, authorized announcement date: on July 16th, 2014, invention and created name is:
Continuous casting heat reclamation device, this application case discloses a kind of continuous casting heat reclamation device, including two lower collector pipe arranged side by side, described two
Top between lower collector pipe is provided with a upper header in the same direction, the sidewall of described two lower collector pipe respectively by two row's longitudinal direction connecting legs with
The sidewall of upper header connects formation shroud-like structure, and described two row's connecting legs form respectively the two side of shroud-like structure, described connecting leg
Upper end is connected with upper header, and the lower end of described connecting leg is connected with corresponding lower collector pipe, described two lower collector pipe respectively with two
Water inlet pipe is connected.This continuous casting heat reclamation device carries out waste heat recovery by the cold water in connecting leg to continuous casting steel billet, after cold water is heated
Flash to the steam for generating, make full use of the energy.
Such as number of patent application: 201480017655.8, the applying date: on March 27th, 2014, invention and created name is: thermoelectricity is sent out
Electric installation and thermoelectric power generation method.That application discloses the opposite disposed of a kind of focus TRT and steel, and according to generating
The output of unit is configured, and it is possible to the thermoelectric generating device obtaining possessing thermoelectric power generation unit, thermal source flowing continuous
In foundry production line or plate continuous casting production line, the heat energy that releasing state changes is converted into electric energy and carries out back by this thermoelectric power generation unit
Receive.
Above patent content all refers to steel billet heat radiation UTILIZATION OF VESIDUAL HEAT IN problem, but before enforcement, is difficult to determine and applies in reality
In whether have a bigger energy transformation ratio, rashly implement to waste bigger manpower, financial resources, industrial equipment is on-the-spot due to all
Restrictive condition is difficult to directly measure.In order to improve effective utilization of radiation preheating, particularly directly convert steel billet thermoelectricity is effective
Design, needs to measure the thermoelectric conversion efficiency of high temperature radiation waste heat, but the most not about more than steel billet hyperthermia radiation
The detection method of hot thermoelectric conversion efficiency.
Summary of the invention
1. invention to solve the technical problem that
It is an object of the invention to overcome prior art directly steel billet high temperature radiation waste heat thermoelectric conversion efficiency to be detected
Not enough, it is provided that the closed simulation detection system of a kind of industry heat radiation thermoelectric conversion efficiency and detection method, the present invention passes through
Simulation industrial production system carries out thermoelectric conversion efficiency detection, and the installation to industrial thermoelectric reforming unit has important directive significance.
2. technical scheme
For reaching above-mentioned purpose, the technical scheme that the present invention provides is:
The closed simulation detection system of the industrial heat radiation thermoelectric conversion efficiency of the present invention, including heat radiating module, thermoelectric conversion
Module and power detection module, described heat radiating module simulation high temperature heat source, for distributing heat to external radiation, this hot spoke
Penetrating and be provided with hollow refractory brick in module, described thermoelectric conversion module is arranged at the upper opening of hollow refractory brick, passes through thermoelectricity
Thermo-electric generation assembly in conversion module is converted into electric energy the heat energy absorbed；Described power detection module and thermoelectric conversion module electricity
Connect, be used for detecting generated output.
As further improvement of the present invention, described heat radiating module also includes high temperature resistance furnace, the inside of hollow refractory brick
Cavity surrounds the heat radiation panel of high temperature resistance furnace.
As further improvement of the present invention, the heat radiation panel of high temperature resistance furnace is provided with heat radiant panel, high temperature resistance furnace
Produce heat by this heat radiant panel to external radiation.
As further improvement of the present invention, described hollow refractory brick is formed by various sizes of refractory brick blocks stacking engaging.
As further improvement of the present invention, described power detection module includes dynamograph, this dynamograph and the temperature difference
Electrification component electrically connects, for the power detection of thermo-electric generation assembly.
As further improvement of the present invention, described thermoelectric conversion module includes heated sheet, thermo-electric generation assembly and water cooling box,
Described heated sheet is arranged on thermo-electric generation assembly bottom, and arranges pyrometer couple between thermo-electric generation assembly and heated sheet；Institute
State water cooling box and be arranged on thermo-electric generation assembly top, between thermo-electric generation assembly and water cooling box, be provided with low temperature thermocouple.
As further improvement of the present invention, described thermo-electric generation assembly is filled with heat conduction with the contact surface of heated sheet and water cooling box
Material.
As further improvement of the present invention, the internal interval of described water cooling box arranges fin, and fin is positioned close to the temperature difference and sends out
The side of electricity assembly.
As further improvement of the present invention, described water cooling box top is provided with fin, and this fin uniform intervals is arranged.
The closed analog detecting method of a kind of industry heat radiation thermoelectric conversion efficiency of the present invention, uses industry heat radiation thermoelectricity to turn
The closed simulation detection system changing efficiency detects, and its process is:
Step one, spacing by increase and decrease refractory brick blocks quantity set heat radiant panel and heated sheet, according to actual needs, if
Determine heat radiant panel shape, and start high temperature resistance furnace heat radiant panel is preheated；
After step 2, preheating 20～60 minutes, heat radiant panel temperature reaches requirement temperature and thermo-electric generation assembly and enters and stablize work
Make state；By dynamograph record generated output PReal, pyrometer couple detection thermo-electric generation assembly hot junction surface temperature now,
The coldest end face temperature of low temperature thermocouple detection thermo-electric generation assembly；
Step 3, according to data measured in step 2, calculate general power P of receptionSurvey；
Step 4, calculating thermoelectric conversion efficiency, its value is: η=PReal/PSurvey。
3. beneficial effect
The technical scheme using the present invention to provide, compared with prior art, has the advantages that
(1) the closed simulation detection system of the industrial heat radiation thermoelectric conversion efficiency of the present invention, is provided with heat radiating module, heat
Electricity conversion module and power detection module, heat radiating module is used for simulating thermal source and produces heat, and thermoelectric conversion module is the heat absorbed
Amount is converted into electric energy, the power simultaneously produced by power detection module detection reality, the heat being absorbed by Theoretical Calculation,
Actual power obtains thermoelectric conversion efficiency compared with Theoretical Calculation power, and the most accurate thermo-electric generation that must give is at high temperature
The gas-to electricity data of waste heat industry, can effectively instruct installing and using of industrial thermoelectric reforming unit；
(2) the closed simulation detection system of the industrial heat radiation thermoelectric conversion efficiency of the present invention, its hollow refractory brick is by multiple
Refractory brick blocks superposition engaging form, by increase and decrease refractory brick blocks quantity, can regulate between heated sheet and heat radiant panel away from
From, it is simple to thermoelectric conversion efficiency during research different spacing；
(3) the closed simulation detection system of the industrial heat radiation thermoelectric conversion efficiency of the present invention, arranges fin inside water cooling box,
Dredge current, and be easy to heat conduction；Fin is set on water cooling box top, it is possible to improve heat radiation by flow of external air
Efficiency, increases the temperature difference, improves generating efficiency, it is simple to trans-utilization in actual production；
(4) the closed analog detecting method of the industrial heat radiation thermoelectric conversion efficiency of the present invention, by dynamograph detection reality
Power, then the thermal exposure that Theoretical Calculation is absorbed, utilize both to be worth to transformation efficiency by ratio, make the industrial environment collection of complexity
Becoming simulation detection system, principle is simple, it is simple to experimental study.
Accompanying drawing explanation
Fig. 1 is the structural representation of the simulation detection system of the present invention；
Fig. 2 is the distributed architecture schematic diagram of fin and refractory brick blocks in the present invention；
Fig. 3 is the cross section structure schematic diagram of refractory brick in the present invention；
Fig. 4 is the structural representation of water cooling box inner fin in the present invention；
Fig. 5 is hollow core refractory brick internal cavities schematic cross-section of the present invention.
Label declaration in schematic diagram: 1, high temperature resistance furnace；2, heat radiant panel；3, hollow refractory brick；301, upper blocking seat；
302, lower bayonet socket；4, heated sheet；5, thermo-electric generation assembly；6, water cooling box；601, water-supply-pipe；7, fin；8, even
Wiring；9, temperature indicator；10, dynamograph.
Detailed description of the invention
For further appreciating that present disclosure, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Embodiment 1
In conjunction with Fig. 1, the closed simulation detection system of the industrial heat radiation thermoelectric conversion efficiency of the present embodiment, including heat radiation mould
Block, thermoelectric conversion module and power detection module, described heat radiating module simulation high temperature heat source, for distributing to external radiation
Heat, is provided with hollow refractory brick 3 in this heat radiating module, thermoelectric conversion module is arranged on the upper opening of hollow refractory brick 3
Place, the heat energy absorbed by the thermo-electric generation assembly in thermoelectric conversion module 5 is converted into electric energy；Described power detection module with
Thermoelectric conversion module electrically connects, and is used for detecting generated output.
Heat radiating module in the present embodiment also includes that high temperature resistance furnace 1, the internal cavities of hollow refractory brick 3 surround high temperature resistance
The heat radiation panel of stove 1.
In industry steel smelting procedure, steel billet has higher temperature, present invention is primarily targeted at and is obtained by simulation test
How efficient absorption converts the heat that steel billet distributes.In order to make heat that high temperature resistance furnace 1 radiated closer to actual production,
Being provided with heat radiant panel 2 on the heat radiation panel of high temperature resistance furnace 1, this heat radiant panel 2 can be steel plate, high temperature resistance
Stove 1 produce heat by this heat radiant panel 2 to external radiation.The heat dissipation characteristics of steel billet can be fully demonstrated out in this experiment,
Reduce the deviation produced between actual production, thus heat radiant panel 2 can be used to obtain more accurately and detect data.For
Plate thermal source, can be set to slab construction heat radiant panel 2, and use iron and steel material quality to simulate bloom production；Also can root
According to concrete practical situation, use and heat radiant panel 2 is set to other materials.
For the ease of obtaining different heat source temperatures, being provided with power regulating knob on high temperature resistance furnace 1, convenient regulation is produced
Raw heat.
Further, thermoelectric conversion module includes heated sheet 4, thermo-electric generation assembly 5 and water cooling box 6, and heated sheet 4 is arranged on temperature
Difference electrification component 5 bottom, this heated sheet 4 is used for absorbing heat, and while absorbing heat, own temperature raises.At thermo-electric generation
Between assembly 5 and heated sheet 4, pyrometer couple is set, detects real time temperature by this pyrometer couple.Pyrometer couple passes through
Connecting line 8 electrically connects with temperature indicator 9, and temperature indicator 9 is for showing the temperature of detection.
Accordingly, water cooling box 6 is arranged on thermo-electric generation assembly 5 top, arranges between thermo-electric generation assembly 5 and water cooling box 6
Having low temperature thermocouple, this low temperature thermocouple is electrically connected with temperature indicator 9 by connecting line 8, and temperature indicator 9 is for inspection
The temperature surveyed shows.Wherein, water cooling box 6 two ends connect water-supply-pipe 601, and water-supply-pipe 601 is for cooling down the circulation of water.
Transmit low temperature by water cooling box 6 to thermo-electric generation assembly 5, make the cold end of thermo-electric generation assembly 5 have relatively low temperature, increase
The hot junction of thermo-electric generation assembly 5 and the temperature difference of cold end, improve generating efficiency.
In order to reflect the temperature of each several part more accurately, also by the surface temperature of infrared temperature-test technology detection heat radiant panel 2
Degree, is detected data more accurately.
Power detection module includes dynamograph 10, and this dynamograph 10 electrically connects with thermo-electric generation assembly 5, for temperature
The power detection of difference electrification component 5.When after simulation detection system working stability, dynamograph 10 and thermo-electric generation assembly 5
The temperature of both sides can fluctuate within the specific limits, overall region steady statue, sending out when generating efficiency now is normal work
Electrical efficiency.
In order to avoid high temperature affects, the connecting line in thermoelectric conversion module can cover with diamond spar pipe, make connecting line wear from diamond spar pipe
Cross, thus extend the service life of detecting system.
Embodiment 2
The closed simulation detection system of the industrial heat radiation thermoelectric conversion efficiency of the present embodiment, its basic structure and embodiment 1 phase
With, its difference is: the cross section of the internal cavities of hollow refractory brick 3 is circular or square, i.e. internal cavities be round platform or
Fang Taizhuan.
Hollow refractory brick 3 is formed by various sizes of refractory brick blocks stacking engaging, the cross section structure of refractory brick blocks as it is shown on figure 3,
The top of refractory brick is provided with upper blocking seat 301, and the bottom of refractory brick blocks is provided with lower bayonet socket 302, the refractory brick blocks of bottom upper
The lower bayonet socket 302 of the refractory brick blocks of the adjacent top of deck 301 is mutually clamped, and makes two refractory brick blocks be overlapped mutually connection.
By the superposition of refractory brick blocks, the distance between heated sheet 4 and heat radiant panel 2 can be increased, thus can detecting distance and thermoelectricity
The relation of the distance between transformation efficiency.
For thermo-electric generation assembly, the temperature difference its generating efficiency the biggest is the highest, but how to obtain the temperature of maximum when being simulated
Difference is a great problem.If allowing heated sheet 4 near thermal source, then the temperature end temperature of thermo-electric generation assembly 5 increases, with this
Meanwhile, water cooling box 6 is owing near thermal source, its internal temperature will necessarily rise, and being easily caused the temperature difference does not the most increase, instead
And have certain reduction；If heated sheet 4 is away from thermal source, then the cold junction temperature change of thermo-electric generation assembly 5 is less, and hot
End temperature can substantially lower, and also results in the temperature difference and diminishes.Therefore, in commercial Application, set thermo-electric converting device the highest
Degree is also the important measures improving generating efficiency.
Additionally, using buckle-type connected mode to be attached between refractory brick blocks rather than simple plane in the present embodiment
Accumulation, will not form the gap communicated with the external world, have more preferable closure in junction, it is ensured that internal heat will not be by even
Seam gap and produce bigger loss, closer in actual production, testing result is more accurate.
Embodiment 3
The closed simulation detection system of the industrial heat radiation thermoelectric conversion efficiency of the present embodiment, its basic structure and embodiment 2 phase
With, its difference is: thermo-electric generation assembly 5 is filled with Heat Conduction Material with the contact surface of heated sheet 4 and water cooling box 6.Institute
Stating Heat Conduction Material can be heat-conducting silicone grease, by the efficient transferring heat energy of Heat Conduction Material energy, reduces the thermal loss of gap location, is
Thermocouple can the change of reaction temperature more accurately.
Further, the internal interval of water cooling box 6 arranges fin, and fin is positioned close to the side of thermo-electric generation assembly 5.
This fin is lamellar, and water-supply-pipe 601 is arranged on the two ends of water cooling box 6, and water (flow) direction is identical with finned length direction, passes through
Fin can bigger efficiency between thermo-electric generation assembly 5 and water cooling box 6, carry out heat exchange.
Embodiment 4
The closed simulation detection system of the industrial heat radiation thermoelectric conversion efficiency of the present embodiment, its basic structure and embodiment 2 phase
With, its difference is: thermo-electric generation assembly 5 is filled with Heat Conduction Material with the contact surface of heated sheet 4 and water cooling box 6.Institute
Stating Heat Conduction Material can be heat-conducting silicone grease, by the efficient transferring heat energy of Heat Conduction Material energy, reduces the thermal loss of gap location, is
Thermocouple can the change of reaction temperature more accurately.
Further, the top of water cooling box is provided with fin 7, and this fin 7 uniform intervals is arranged, and fin 7
Length direction is vertical with water (flow) direction, can be increased the contact area of water cooling box 6 and air by this fin 7, utilize air
Flowing to the cooling water temperature in water cooling box 6, promote the temperature end of thermo-electric generation assembly 5 and cold end to have the bigger temperature difference.
What deserves to be explained is, the heat radiant panel 2 in the present invention can need to be designed as circular or square structure according to detection；
If the heat radiation experiment of bar to be simulated, heat radiant panel 2 can be designed to semicircular bar structure, and circular arc
Face is on top so that it is can be close to the heat radiation characteristics of bar.
The closed analog detecting method of a kind of industry heat radiation thermoelectric conversion efficiency of the present invention, uses industry heat radiation thermoelectricity to turn
The closed simulation detection system changing efficiency detects, and its process is:
Step one, spacing by increase and decrease refractory brick blocks quantity set heat radiant panel 2 with heated sheet 4, according to actual needs,
Set heat radiant panel 2 shape, and start high temperature resistance furnace 1 heat radiant panel 2 is preheated, can preheating temperature set
It it is 76～860K, in order to examinations；The outside radiations heat energy of heat radiant panel 2, and entered by Si Tepan-Boltzmann's law
Row heat Calculation；
Step 2, preheating 20～60 minutes after, heat radiant panel 2 temperature reaches requirement temperature 800K, and thermo-electric generation assembly 5
Entering steady-working state, the temperature difference keeps minor fluctuations within the specific limits；Then generated output is recorded by dynamograph 10
PReal, and record the temperature that temperature indicator 9 in the same time is recorded, pyrometer couple detection thermo-electric generation assembly 5 heat now
End face temperature, the coldest end face temperature of low temperature thermocouple detection thermo-electric generation assembly 5；
Step 3, according to data measured in step 2, calculate general power P of receptionSurvey；The ascent meter used during calculating
Calculation formula is:
Referring to Fig. 5, wherein ab, ac, ad, bd, bc are the line segment length between corresponding 2 of a, b, c, d；
Step 4, calculating thermoelectric conversion efficiency, its value is: η=PReal/PSurvey。
Embodiment 5
Measure for the ease of experiment, can be set to square by the lumenal cross-section of heat refractory brick blocks, then longitudinal cross-section is trapezoidal,
The upper end length of side of the hollow refractory brick inner chamber formed is 12cm, and a length of 28cm in base, height is 15cm, and heated sheet 4 is the length of side
The square copper coin of 12cm, this copper coin smooth surface, thermal absorptivity is 0.8, and thermal emissivity is 0.05, and heated sheet 4 and heat
Radiant panel 2 be arranged in parallel, and distance between the two is 15cm.Thermo-electric generation assembly 5 can be by the temperature difference of 4 pieces of length of sides 4cm
Generating sheet composition, then the gross area is 0.0064.
During detection, starting high temperature resistance furnace 1, preheat heat radiant panel 2 20 minutes, detection steel billet temperature reaches 800K, high
It is 400K that warm galvanic couple records the temperature end temperature of thermo-electric generation assembly 5；Low temperature thermocouple records the cold end of thermo-electric generation assembly 5
Temperature is 340K, and the temperature difference reaches 60K, and dynamograph 10 records generated output PRealFor 4.416W.
Calculating amount of heat absorption, calculate according to thermal conduction study Si Tepan-Boltzmann's law, its formula is: E=A δ ε T4,
Wherein, E is the heat of radiation；δ is radiation coefficient, δ=5.67 × 10-8W/㎡×K4；
A is radiant panel area, and ε is emissivity；
Can calculate thermal source amount of radiation is
E=0.282×5.67×10-8×0.8×8004=1456W；
Wherein the effective area of heat radiant panel 2 is 0.282=0.0784m2, the emissivity of steel plate is 0.8.
The radiant heat that heated sheet receives is multiplied by ascent equal to the radiant heat launched, and referring to Fig. 5, the formula of ascent is
Wherein ab, ac, ad, bd, bc are the line segment length between corresponding 2 of a, b, c, d；
It is calculated ascent Xab,cd=0.718, then the thermal exposure that heated sheet is absorbed as absorbing surface is:
0.718 E=0.718 × 1456=1045W；
And then the general power calculating to receive is:
Thus calculate transformation efficiency and be:
Embodiment 6
Measuring for the ease of experiment, can be provided in round by the lumenal cross-section of heat refractory brick blocks, longitudinal section remains as
Reminding, the upper end diameter of the hollow refractory brick inner chamber of formation is 12cm, and base diameter is 28cm, and height is 15cm, heated sheet 4
For the square copper coin of length of side 13cm, this copper coin smooth surface, thermal absorptivity is 0.8, and thermal emissivity is 0.05, and heated sheet 4
Be arrangeding in parallel with heat radiant panel 2, distance between the two is 15cm.Thermo-electric generation assembly 5 can be by 4 pieces of length of sides 4cm
Thermo-electric generation sheet composition, its gross area is 0.0064.
During detection, starting high temperature resistance furnace 1, preheat heat radiant panel 2 20 minutes, detection steel billet temperature reaches 800K, high
It is 396K that warm galvanic couple records the temperature end temperature of thermo-electric generation assembly 5；Low temperature thermocouple records the cold end of thermo-electric generation assembly 5
Temperature is 340K, and the temperature difference reaches 56K, and dynamograph 10 records generated output PRealFor 4.396W.
Calculating amount of heat absorption, calculate according to thermal conduction study Si Tepan-Boltzmann's law, its formula is: E=A δ ε T4,
Wherein, E is the heat of radiation；δ is radiation coefficient, δ=5.67 × 10-8W/㎡×K4；
A is radiant panel area, and ε is emissivity；
Can calculate thermal source amount of radiation is
E=0.282×5.67×10-8×0.8×8004=1456W；
Wherein the effective area of heat radiant panel 2 is 0.282=0.0784m2, the emissivity of steel plate is 0.8.
The radiant heat that heated sheet 4 receives is multiplied by ascent, according to the formula of ascent equal to the radiant heat launched
Wherein ab, ac, ad, bd, bc are the line segment length between corresponding 2 of a, b, c, d；
It is calculated ascent Xab,cd=0.718, then the thermal exposure that heated sheet is absorbed as absorbing surface is:
0.718 E=0.718 × 1456=1045W；
And then the general power calculating to receive is:
Thus calculate transformation efficiency and be:
According to embodiment 5 and embodiment 6, in the case of the alteration of form of internal cavities, longitudinal cross-section is still trapezoidal,
Ascent does not changes, and the temperature difference is constant, and the generating efficiency of thermo-electric generation assembly is constant；But due to the reduction of heated sheet area, institute's energy
The heat absorbed reduces, and the temperature of temperature end has certain decline, causes thermoelectric conversion efficiency to reduce.
Embodiment 7
Measure for the ease of experiment, can be set to square by the intracavity section of heat refractory brick blocks, then longitudinal cross-section is trapezoidal for carrying,
The upper end length of side of the hollow refractory brick formed is 14cm, and a length of 28cm in base, height is 12.5cm, and heated sheet 4 is length of side 15cm
Square copper coin, this copper coin smooth surface, thermal absorptivity is 0.8, and thermal emissivity is 0.05, and heated sheet 4 and heat radiant panel
2 be arranged in parallel, and distance between the two is 12.5cm.Thermo-electric generation assembly 5 can be by the thermo-electric generation sheet of 4 pieces of length of sides 4cm
Composition, then the gross area is 0.0064.
During detection, starting high temperature resistance furnace 1, preheat heat radiant panel 2 20 minutes, detection steel billet temperature reaches 800K, high
It is 420K that warm galvanic couple records the temperature end temperature of thermo-electric generation assembly 5；Low temperature thermocouple records the cold end of thermo-electric generation assembly 5
Temperature is 350K, and the temperature difference reaches 70K, and dynamograph 10 records generated output PRealFor 5.721W.
Calculating amount of heat absorption, calculate according to thermal conduction study Si Tepan-Boltzmann's law, its formula is: E=A δ ε T4,
Wherein, E is the heat of radiation；δ is radiation coefficient, δ=5.67 × 10-8W/㎡×K4；
A is radiant panel area, and ε is emissivity；
Can calculate thermal source amount of radiation is
E=0.282×5.67×10-8×0.8×8004=1456W；
Wherein the effective area of heat radiant panel 2 is 0.282=0.0784m2, the emissivity of steel plate is 0.8.
The radiant heat that heated sheet receives is multiplied by ascent equal to the radiant heat launched, and referring to Fig. 5, the formula of ascent is
Wherein ab, ac, ad, bd, bc are the line segment length between corresponding 2 of a, b, c, d；
It is calculated ascent Xab,cd=0.786, then the thermal exposure that heated sheet is absorbed as absorbing surface is:
0.786 E=0.786 × 1456=1144W；
And then the general power calculating to receive is:
Thus calculate transformation efficiency and be:
Embodiment 8
Measuring for the ease of experiment, can be set to square by the lumenal cross-section of heat refractory brick blocks, longitudinal cross-section is trapezoidal,
The upper end length of side of the hollow refractory brick formed is 16cm, and a length of 28cm in base, height is 10cm, and heated sheet 4 is length of side 17cm
Square copper coin, this copper coin smooth surface, thermal absorptivity is 0.8, and thermal emissivity is 0.05, and heated sheet 4 and heat radiant panel
2 be arranged in parallel, and distance between the two is 10cm.Thermo-electric generation assembly 5 can be by the thermo-electric generation sheet group of 4 pieces of length of sides 4cm
Become, then the gross area is 0.0064.
During detection, starting high temperature resistance furnace 1, preheat heat radiant panel 2 20 minutes, detection steel billet temperature reaches 800K, high
It is 450K that warm galvanic couple records the temperature end temperature of thermo-electric generation assembly 5；Low temperature thermocouple records the cold end of thermo-electric generation assembly 5
Temperature is 370K, and the temperature difference reaches 80K, and dynamograph 10 records generated output PRealFor 7.02W.
Calculating amount of heat absorption, calculate according to thermal conduction study Si Tepan-Boltzmann's law, its formula is: E=A δ ε T4,
Wherein, E is the heat of radiation；δ is radiation coefficient, δ=5.67 × 10-8W/㎡×K4；
A is radiant panel area, and ε is emissivity；
Can calculate thermal source amount of radiation is
E=0.282×5.67×10-8×0.8×8004=1456W；
Wherein the effective area of heat radiant panel 2 is 0.282=0.0784m2, the emissivity of steel plate is 0.8.
The radiant heat that heated sheet receives is multiplied by ascent equal to the radiant heat launched, and referring to Fig. 5, the formula of ascent is
Wherein ab, ac, ad, bd, bc are the line segment length between corresponding 2 of a, b, c, d；
It is calculated ascent Xab,cd=0.812, then the thermal exposure that heated sheet is absorbed as absorbing surface is:
0.812 E=0.812 × 1456=1182W；
And then the general power calculating to receive is:
Thus calculate transformation efficiency and be:
By embodiment 5～8 it can be seen that when the heating surface area of thermo-electric generation assembly is constant, along with heated sheet and heat radiant panel
The reduction of spacing, the temperature difference is continuously increased, and transformation efficiency increases, not because of distance near and do not occur that what the temperature difference reduced shows
As, by analysis, it main reason is that closed simulation detection system controls major part heat at refractory brick cavity inside,
Decrease the heat impact on water cooling box of radiation, so when distance is close, the temperature difference can be continuously increased, but when near distance being
During below 6cm, although still have the bigger temperature difference, but thermo-electric generation assembly generating efficiency is the lowest, and after the short time uses just
Can damage, if i.e. hypotelorism, higher temperature can cause thermo-electric generation assembly to damage, and can not get bigger generated output.
Further, it can be seen that substantial amounts of heat energy is not obtained by, when the temperature difference one timing, transformation efficiency is main and thermo-electric generation group
The area of part is relevant, and the thermo-electric generation assembly being distributed is the most, and the utilization to heat radiation waste heat is the biggest.
Schematically being described the present invention and embodiment thereof above, this description does not has restricted, shown in accompanying drawing yet
Simply one of embodiments of the present invention, actual structure is not limited thereto.So, if those of ordinary skill in the art
Enlightened by it, in the case of without departing from the invention objective, design the knot similar to this technical scheme without creative
Structure mode and embodiment, all should belong to protection scope of the present invention.
Claims (10)
1. the closed simulation detection system of industry heat radiation thermoelectric conversion efficiency, it is characterised in that: include heat radiating module, heat
Electricity conversion module and power detection module, described heat radiating module simulation high temperature heat source, for distributing heat to external radiation,
Being provided with hollow refractory brick (3) in this heat radiating module, described thermoelectric conversion module is arranged on the top of hollow refractory brick (3) and opens
At Kou, by the thermo-electric generation assembly (5) in thermoelectric conversion module, the heat energy absorbed is converted into electric energy；Described power detection mould
Block electrically connects with thermoelectric conversion module, is used for detecting generated output.
The closed simulation detection system of industry heat radiation thermoelectric conversion efficiency the most according to claim 1, it is characterised in that:
Described heat radiating module also includes that high temperature resistance furnace (1), the internal cavities of hollow refractory brick (3) surround high temperature resistance furnace (1)
Heat radiation panel.
The closed simulation detection system of industry heat radiation thermoelectric conversion efficiency the most according to claim 2, it is characterised in that:
The heat radiation panel of high temperature resistance furnace (1) is provided with heat radiant panel (2), and the heat that high temperature resistance furnace (1) produces is by being somebody's turn to do
Heat radiant panel (2) is to external radiation.
The closed simulation detection system of industry heat radiation thermoelectric conversion efficiency the most according to claim 2, it is characterised in that:
Described hollow refractory brick (3) is formed by various sizes of refractory brick blocks stacking engaging.
The closed simulation detection system of industry heat radiation thermoelectric conversion efficiency the most according to claim 1, it is characterised in that:
Described power detection module includes that dynamograph (10), this dynamograph (10) electrically connect with thermo-electric generation assembly (5),
Power detection for thermo-electric generation assembly (5).
6. according to the closed simulation detection system of the industrial heat radiation thermoelectric conversion efficiency according to any one of Claims 1 to 5,
It is characterized in that: described thermoelectric conversion module includes heated sheet (4), thermo-electric generation assembly (5) and water cooling box (6), described be subject to
Hot plate (4) is arranged on thermo-electric generation assembly (5) bottom, and arranges between thermo-electric generation assembly (5) and heated sheet (4)
Pyrometer couple；Described water cooling box (6) is arranged on thermo-electric generation assembly (5) top, in thermo-electric generation assembly (5) and water-cooled
Case is provided with low temperature thermocouple between (6).
The closed simulation detection system of industry heat radiation thermoelectric conversion efficiency the most according to claim 6, it is characterised in that:
Described thermo-electric generation assembly (5) is filled with Heat Conduction Material with the contact surface of heated sheet (4) and water cooling box (6).
The closed simulation detection system of industry heat radiation thermoelectric conversion efficiency the most according to claim 6, it is characterised in that:
The internal interval of described water cooling box (6) arranges fin, and fin is positioned close to the side of thermo-electric generation assembly (5).
The closed simulation detection system of industry heat radiation thermoelectric conversion efficiency the most according to claim 6, it is characterised in that:
Described water cooling box (6) top is provided with fin (7), and this fin (7) uniform intervals is arranged.
10. a closed analog detecting method for industrial heat radiation thermoelectric conversion efficiency, uses industry heat radiation thermoelectric conversion effect
The closed simulation detection system of rate detects, and its process is:
Step one, by increase and decrease refractory brick blocks quantity set heat radiant panel (2) and the spacing of heated sheet (4), according to reality
Border needs, and sets heat radiant panel (2) shape, and starts high temperature resistance furnace (1) and preheat heat radiant panel (2)；
Step 2, preheating 20～60 minutes after, heat radiant panel (2) temperature reaches requirement temperature and thermo-electric generation assembly (5)
Enter steady-working state；Generated output P is recorded by dynamograph (10)Real, pyrometer couple detection thermo-electric generation assembly
(5) hot junction surface temperature now, the coldest end face temperature of low temperature thermocouple detection thermo-electric generation assembly (5)；
Step 3, according to data measured in step 2, calculate general power P of receptionSurvey；
Step 4, calculating thermoelectric conversion efficiency, its value is: η=PReal/PSurvey。
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