CN208313872U - A kind of experimental provision for studying convection current and radiating comprehensive heat exchange - Google Patents
A kind of experimental provision for studying convection current and radiating comprehensive heat exchange Download PDFInfo
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- CN208313872U CN208313872U CN201820948820.7U CN201820948820U CN208313872U CN 208313872 U CN208313872 U CN 208313872U CN 201820948820 U CN201820948820 U CN 201820948820U CN 208313872 U CN208313872 U CN 208313872U
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- airflow line
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Abstract
The utility model provides a kind of experimental provision for studying convection current and radiating comprehensive heat exchange, is related to experimental provision field.Wherein, this for studying the experimental provision of convection current and the comprehensive heat exchange of radiation, including pedestal, the supporting portion as device.Blower, blower are fixed on pedestal.Airflow line, one end of airflow line and the air outlet of blower connect.Heating rod is set on airflow line, is conducted heat as heat source to the air-flow in airflow line.First temperature element is set on airflow line, the temperature of the inflow stream for measuring airflow line.Detecting element is set on airflow line, for measuring the speed of pipeline interior air-flow.Second temperature element is set on heating rod, for measuring the surface temperature of heating rod.Electrical measurement element, connect with heating rod, for measuring the operating voltage and operating current of heating rod.The experimental provision of the heat exchange parameter of convection current and the comprehensive heat exchange of radiation can be effectively measured by using the utility model.
Description
Technical field
The utility model relates to experimental provision fields, change for studying convection current with radiation synthesis in particular to one kind
The experimental provision of heat.
Background technique
For heat-exchanger rig using extensively in industry and life, the mode of heat exchange mainly has heat convection and radiation heat transfer.Mesh
Before, the relevant parameter of heat convection and radiation heat transfer can be measured without a kind of simple and effective experimental provision, lead to not into
The research of row heat transfer mechanism constrains the further improvement optimization that technical staff exchanges thermal.
In consideration of it, inventors herein proposing the utility model.
Utility model content
The utility model provides a kind of for studying the experimental provision of convection current and the comprehensive heat exchange of radiation, it is desirable to provide a kind of
The experimental provision of the heat exchange parameter of convection current and the comprehensive heat exchange of radiation can effectively be measured.
The utility model is realized in this way:
A kind of experimental provision for studying convection current and radiating comprehensive heat exchange, comprising:
Pedestal, the supporting portion as device.
Blower, blower are fixed on pedestal, and the air flow rate of the air outlet of blower is adjustable.
Airflow line, one end of airflow line and the air outlet of blower connect, and can pass through air-flow in pipeline.
Heating rod is set on airflow line, is conducted heat as heat source to the air-flow in airflow line.
First temperature element is set on airflow line, the temperature of the inflow stream for measuring airflow line.
Detecting element is set on airflow line, for measuring the speed of pipeline interior air-flow.
Second temperature element is set on heating rod, for measuring the surface temperature of heating rod.
Electrical measurement element, connect with heating rod, for measuring the operating voltage and operating current of heating rod.
Further, the first temperature element is set to the position on airflow line close to fan outlet.
Detecting element is set to the medium position of the airflow line length.
Heating rod is set to the top position of airflow line.
Further, heating rod can be rotated around the axis of barred body.
Further, the barred body material of heating rod is SUS310 seamless steel, and barred body surface is coated with high emissivity heat resistant coating.
Further, the diameter of heating rod is 10mm, and effective heated length is 90mm.The end face of heating rod does not connect after installation
Touch the tube wall of airflow line.
Further, the inside of airflow line is protruded into the test side of detecting element, and built-in length is airflow line diameter
1/3-1/2。
The inside of airflow line is protruded into the test side of first temperature element, and built-in length is the 1/5-1/ of airflow line diameter
4。
Further, the test side of the second temperature element is located at the medium position of heating rod barred body length, apart from heating rod
Outer surface of rod 0.5-1mm.
Further, airflow line and the blower junction are equipped with strainer and sealing ring.
By using the utility model, important parameter when each detector effectively measures heat exchange can use, and pass through
It analyzes these parameters and existing calculation formula obtains the coefficient of heat transfer of heat convection and radiation heat transfer, to pass through each parameter
It is improved with the adjustment exchange thermal of heat-exchanger rig structure.
Detailed description of the invention
It, below will be to required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
The attached drawing used is briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore not
It should be considered as the restriction to range, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other relevant attached drawings.
Fig. 1 is structural schematic diagram of the embodiment under the first visual angle；
Fig. 2 is schematic cross-section of the heating rod under the second visual angle in embodiment.
Specific embodiment
It is practical below in conjunction with this to keep the purposes, technical schemes and advantages of the utility model embodiment clearer
The technical solution in the utility model embodiment is clearly and completely described in attached drawing in novel embodiment, shows
So, described embodiment is a part of embodiment of the utility model, rather than whole embodiments.It is practical based on this
Embodiment in novel, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment is fallen within the protection scope of the utility model.Therefore, the implementation to the utility model provided in the accompanying drawings below
The detailed description of mode is not intended to limit the range of claimed invention, but is merely representative of the utility model
Selected embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative labor
Every other embodiment obtained under the premise of dynamic, fall within the protection scope of the utility model.
As shown in Figure 1, a kind of for studying the experimental provision of convection current and the comprehensive heat exchange of radiation, including pedestal 1, blower 2, gas
Flow tube road 3, heating rod 4, the first temperature element 5, detecting element 6, the second temperature element 7 and electrical measurement element 8.Wherein pedestal 1
It is the supporting portion of the present apparatus, the blower 2 is fixed on the pedestal 1, and the air-out flow of blower 2 is adjustable, the gas flow tube
The one end in road 3 is connect with the air outlet of the blower 2, under blower 2 can be produced from the airflow line 3 in the present embodiment
Air-flow on and simulates forced convertion and free convection by the opening and closing of blower 2 respectively, by adjusting air-out flow
The flow velocity of the adjustable forced convertion of size.
Heating rod 4 is set on the airflow line 3, is conducted heat as heat source to the air-flow in the airflow line 3, is radiation
Heat exchange and heat convection in require using component.Meanwhile the means as observation, it needs using detecting instrument measurement heat exchange
Parameter in the process, these parameters can be gas flow temperature, heating rod temperature and air velocity etc..
The first temperature element 5 is set on the airflow line 3 in the present embodiment, for measuring the airflow line 3
The temperature of inflow stream.Detecting element 6 is set on the airflow line 3, for measuring the speed of the pipeline interior air-flow.Second
Temperature element 7 is set on the heating rod 4, for measuring the surface temperature of the heating rod 4.Electrical measurement element 8 and the heating
Stick 4 connects, for measuring the operating voltage and operating current of the heating rod 4.
First temperature element 5 can be K-type thermocouple, and detecting element 6 can be anemobiagraph, and the second temperature element 7 can be with
It is K-type thermocouple, electrical measurement element 8 can be measurement and control instrument, it will be understood that other can be realized thermometric, test the speed and voltage and current
The element or instrument of measurement can also be used as the selection of the utility model.Wherein in the present embodiment measurement and control instrument can not only measure plus
The operating voltage and operating current of hot pin 4, by connecting with blower 2, measurement and control instrument can also control 2 air flow rate of blower, pass through
It is connect with the first temperature element 5 and the second temperature element 7, measurement and control instrument can also show respective measured value, be convenient for experimental data
Record and analysis.
By using above-mentioned apparatus, important parameter when each detector effectively measures heat exchange can use, and by dividing
It analyses these parameters and existing calculation formula obtains the coefficient of heat transfer of heat convection and radiation heat transfer.
The operating voltage and operating current for the heating rod 4 that can be specifically obtained by electrical measurement element 8 calculate heating rod 4
Actual consumption power, measure obtained air velocity and the first temperature element 5, the second thermometric then in conjunction with detecting element 6
Element 7 measures several groups of obtained temperature datas and calculates convection transfer rate and radiation heat transfer coefficient equivalence, thus technical staff
Thermal can be exchanged by the adjustment of each parameter and heat-exchanger rig structure to improve.
First temperature element 5 described in the present embodiment is set on the airflow line 3 close to 2 air outlet of blower
Position, initial temperature when the first temperature element 5 measurement air-flow being made just to have entered airflow line 2, is arranged the temperature measured in this way
Compare rationally.
The detecting element 6 is set to the medium position of 3 length of airflow line, since air-flow is after air inlet,
It tends towards stability substantially in airflow line 2, the measurement of wind speed can be made more accurate.
Strainer and sealing ring also are equipped in airflow line and the blower junction in the present embodiment.Sealing ring can make to connect
The air-flow at the place of connecing will not leak, and prevent the actual airflow flow in airflow line 2 from becoming smaller.And strainer can to enter airflow line
2 air-flow is rectified, and stablizes air-flow further, convenient for accurately measuring for wind speed.
The heating rod 4 is set to the top position of the airflow line 3, and the position of heating rod 4 is arranged in the first thermometric
The upper surface of element 5 and detecting element 6 can influence temperature of incoming flow and wind speed to the heat transfer of air-flow to avoid heating rod 4, cause to survey
Amount inaccuracy.
The barred body material of the heating rod 4 is SUS310 seamless steel, and the barred body surface is coated with high emissivity heat resistant coating.
It is understood that other heat resistances and the good material of thermal conductivity can also be used as the raw material of heating rod 4, pass through in the present embodiment
The performance of multiple material, which compares, has selected optimal SUS310 seamless steel.
The diameter of the heating rod 4 is 10mm, and effective heated length is 90mm, elongated in shape.The length of heating rod 4 is arranged
It is to guarantee the abundant progress of heat transfer to enable to protrude into the barred body of airflow line 2 sufficiently and air flow contacts.And too small diameter
The draw ratio that will cause heating rod 4 is too big, influences the stability of its rigidity and connection, and excessive diameter can then stop air-flow, make
The flowing of air-flow becomes slow, therefore the length that heating rod 4 is corresponded in the present embodiment has selected the size of diameter.
The end face of the heating rod 4 does not contact the tube wall of the airflow line 3 after installation, can reduce heating rod 4 in this way
Conduction keeps measurement data more accurate to the heat on airflow line 2 to keep heating rod 4 and the heat exchange of air-flow more abundant.
The measuring section of detecting element 6 and the first temperature element 5 be all in it is rodlike, in order to install.And the detecting element 6
Test side protrude into the inside of the airflow line 3, built-in length is the 1/3-1/2 of 3 diameter of airflow line.Using the knot
Structure can make the measurement end of detecting element 6 be located at the central part of air-flow in pipeline, due to flow velocity all phases of air-flow central part
It is uniform to edge, the result of measurement can be made more accurate.
The inside of the airflow line 3 is protruded into the test side of first temperature element 5, and built-in length is the gas flow tube
The 1/5-1/4 of 3 diameter of road.Too long and rough air, the air velocity after being allowed to can be protruded into avoid temperature measurement fraction in this way
It measures more stable.
As shown in Fig. 2, the test side of second temperature element 7 is located at the medium position of the 4 barred body length of heating rod,
Outer surface of rod 0.5-1mm apart from the heating rod 4.Since heating rod 4 is directly exposed in the test side of the second temperature element 7
Surface is easy to appear test side and contacts incomplete situation with 4 surface of heating rod, to influence the accuracy of temperature measurement, uses
Above structure setting, it is ensured that the accuracy of measurement result.The second thermometric member can be seen that according to the length of heating rod 4 simultaneously
The test side of part 7 also is located at the center of air-flow in pipeline, ensure that the accuracy of measurement result.
Heating rod 4 described in the present embodiment can be rotated around the axis of barred body, in this way can be with when carrying out heat exchange situation measurement
Direction of the test side of the second temperature element 7 relative to air-flow, heating when can simulate heat exchange are adjusted by rotary heating stick 4
The actual temperature of the circumferentially upper different location of the barred body of stick 4, the parameter feedback as Local Heat Transfer situation.
Above description is merely a prefered embodiment of the utility model, is not intended to limit the utility model, for
For those skilled in the art, various modifications and changes may be made to the present invention.All spirit and original in the utility model
Within then, any modification, equivalent replacement, improvement and so on be should be included within the scope of protection of this utility model.
Claims (8)
1. a kind of for studying the experimental provision of convection current and the comprehensive heat exchange of radiation characterized by comprising
Pedestal (1), the supporting portion as device；
Blower (2), the blower (2) are fixed on the pedestal (1), and the air flow rate of the air outlet of the blower (2) is adjustable；
One end of airflow line (3), the airflow line (3) is connect with the air outlet of the blower (2), can be passed through in pipeline
Air-flow；
Heating rod (4) is set on the airflow line (3), is conducted heat as heat source to the air-flow in the airflow line (3)；
First temperature element (5) is set on the airflow line (3), for measuring the inflow stream of the airflow line (3)
Temperature；
Detecting element (6) is set on the airflow line (3), for measuring the speed of the pipeline interior air-flow；
Second temperature element (7) is set on the heating rod (4), for measuring the surface temperature of the heating rod (4)；
Electrical measurement element (8) is connect with the heating rod (4), for measuring the operating voltage and work electricity of the heating rod (4)
Stream.
2. according to claim 1 for studying the experimental provision of convection current and the comprehensive heat exchange of radiation, it is characterised in that: described
First temperature element (5) is set to the position on the airflow line (3) close to the blower (2) air outlet；
The detecting element (6) is set to the medium position of the airflow line (3) length；
The heating rod (4) is set to the top position of the airflow line (3).
3. according to claim 2 for studying the experimental provision of convection current and the comprehensive heat exchange of radiation, it is characterised in that: described
Heating rod (4) can be rotated around the axis of barred body.
4. according to claim 3 for studying the experimental provision of convection current and the comprehensive heat exchange of radiation, it is characterised in that: described
The barred body material of heating rod (4) is SUS310 seamless steel, and the barred body surface is coated with high emissivity heat resistant coating.
5. according to claim 4 for studying the experimental provision of convection current and the comprehensive heat exchange of radiation, it is characterised in that:
The diameter of the heating rod (4) is 10mm, and effective heated length is 90mm；The end face of the heating rod (4) is not after installation
Contact the tube wall of the airflow line (3).
6. according to claim 5 for studying the experimental provision of convection current and the comprehensive heat exchange of radiation, it is characterised in that:
The inside of the airflow line (3) is protruded into the test side of the detecting element (6), and built-in length is the airflow line
(3) 1/3-1/2 of diameter；
The inside of the airflow line (3) is protruded into the test side of first temperature element (5), and built-in length is the gas flow tube
The 1/5-1/4 of road (3) diameter.
7. according to claim 6 for studying the experimental provision of convection current and the comprehensive heat exchange of radiation, it is characterised in that:
The test side of second temperature element (7) is located at the medium position of the heating rod (4) barred body length, and distance is described to be added
The outer surface of rod 0.5-1mm of hot pin (4).
8. according to claim 7 for studying the experimental provision of convection current and the comprehensive heat exchange of radiation, it is characterised in that: air-flow
Pipeline (3) and the blower (2) junction are equipped with strainer and sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820948820.7U CN208313872U (en) | 2018-06-19 | 2018-06-19 | A kind of experimental provision for studying convection current and radiating comprehensive heat exchange |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820948820.7U CN208313872U (en) | 2018-06-19 | 2018-06-19 | A kind of experimental provision for studying convection current and radiating comprehensive heat exchange |
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| CN208313872U true CN208313872U (en) | 2019-01-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567741A (en) * | 2019-08-07 | 2019-12-13 | 中国科学技术大学 | Fire extinguishing efficiency detection method and system of wind-driven dominant field fire extinguishing machine |
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2018
- 2018-06-19 CN CN201820948820.7U patent/CN208313872U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567741A (en) * | 2019-08-07 | 2019-12-13 | 中国科学技术大学 | Fire extinguishing efficiency detection method and system of wind-driven dominant field fire extinguishing machine |
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