CN202024973U - Thermotechnical performance detecting device of air duct type heat exchange device - Google Patents
Thermotechnical performance detecting device of air duct type heat exchange device Download PDFInfo
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- CN202024973U CN202024973U CN2011200068788U CN201120006878U CN202024973U CN 202024973 U CN202024973 U CN 202024973U CN 2011200068788 U CN2011200068788 U CN 2011200068788U CN 201120006878 U CN201120006878 U CN 201120006878U CN 202024973 U CN202024973 U CN 202024973U
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Abstract
The utility model discloses a thermotechnical performance detecting device of an air duct type heat exchange device, which is characterized in that an electric heating section, a cyclone baffle, a rectifying grating, a damping net, a Vickers curveted surface section, a test piece front testing section, a test piece, a test piece rear testing section, a circumference transition section, a round steady flow section and a fan which are arranged in series in sequence from an air duct inlet so as to form an air duct, the section of the air duct from the air duct inlet to the circumference transition section is a rectangular section, and the section of the air duct from an outlet of the circumference transition section to an input of the fan is a round section. The thermotechnical performance detecting device can improve the detecting range and accuracy, not only can carry out the detection of heat exchange between normal temperature air and hot liquid, but also can carry out the detection of heat exchange between hot air and cool liquid.
Description
Technical field
The utility model relates to fields such as being applied in oil, chemical industry, power, atomic energy, machinery, is used to detect with the thermal property of liquid-gas as the heat transmission equipment of heat exchange medium.
Background technology
Heat transmission equipment thermal property pick-up unit is mainly used in the detection heat transmission equipment and carries out the ability of heat interchange and the drag characteristic of convection cell.Detection comprises that liquid-liquid, liquid-steam, liquid-gas are the heat transmission equipment that medium carries out heat interchange.It is the heat transmission equipment that medium carries out heat interchange that air duct type heat transmission equipment thermal property pick-up unit is used to detect with liquid-gas.
Figure 1 shows that the structural representation of existing air duct type heat transmission equipment pick-up unit, primary structure is from the entry position 1, sets gradually test section 4, fan assembly 6 and the air draft assembly 7 of air current regulator 2, transition section 3, heat interchanger 5 positions.
It detects principle as shown in Figure 2, and the gas side air sucks the air channel by inlet, through the test specimen heat exchange of heat interchanger 5, discharges from air draft assembly 7; It is temperature required that liquid in the hydraulic fluid side reservoir 8 is heated to test through thermal source shown in Figure 29, by pump liquid is transported to and carries out exchange heat in the heat interchanger 5, returns in the reservoir 8; The heat of gas side in test specimen calculates by point for measuring temperature T1i, T1o among Fig. 2 and the measured data of flowmeter V1; The heat of hydraulic fluid side in test specimen calculates by point for measuring temperature T2i, T2o among Fig. 2 and the measured data of flowmeter V2; Gas side and hydraulic fluid side drag characteristic are recorded by differential manometer Δ P1, Δ P2 among Fig. 2 respectively.Each heat interchanger test specimen detects through the thermal property of a plurality of different operating points, finally provides the thermal property comprehensive detection result of heat interchanger test specimen.Its structure is simple relatively, but measurement range is limited, and the main problem that exists comprises:
1, is heat transferring medium directly, can not carries out adjustment, therefore can only carry out the heat exchange detection that air and hot liquid under the environment temperature carry out for inhaled air in the air channel with the air in the test environment.
2, mainly be the adjustment of carrying out the flow field with the duct cross-section shape, can not make air stable in the duct cross-section even flow field;
3, transient mode mostly is the linear pattern transition between the different cross section of air channel, has not only increased the air flow field unevenness, has also increased fluid resistance;
4, measuring sensor is simple, and measuring accuracy is low.
The utility model content
The utility model is for avoiding above-mentioned existing in prior technology weak point, a kind of air duct type heat transmission equipment thermal property pick-up unit is provided, in the hope of improving sensing range and precision, not only the detection that normal temperature air and hot liquid carry out heat interchange can be carried out, the detection that hot-air and cold liquid carry out heat interchange can also be carried out.
The utility model technical solution problem adopts following technical scheme:
The design feature of the utility model air duct type heat transmission equipment thermal property pick-up unit is: from air channel inlet series connection successively electric heater section is set), test section, circumference transition section behind the cyclone baffle plate, flow straightening grid, damping screen, Vickers curved sections, test specimen Pretesting section, test specimen, test specimen, justify steady flow segment and become the air channel with wind mechanism; Cross section, entry position to described circumference transition section is the square-section from described air channel inlet in described air channel, and described air channel is round section from the entrance section that is exported to blower fan that has an area of transition section.
The design feature of the utility model air duct type heat transmission equipment thermal property pick-up unit also is:
Described electric heater section is to be evenly distributed electric heating tube in rectangular channel, and the appearance of electric heating tube is provided with radiating fin; The rectangular channel front end of electric heater section is connected with the air channel inlet, and the rear end is connected with the square-section at cyclone baffle plate place.
Described cyclone baffle plate is on the cross section of rectangular channel, and four triangle fair water fin alternative arrangement form the eddy flow of air-flow in this cross section;
Described flow straightening grid is with screen rectangular channel evenly to be separated into a plurality of little rectangular channels, and the air-flow that makes the process flow straightening grid is along the air channel axia flow.
Described damping screen is a wire gauze, and described wire netting is fixed on the madial wall of air channel, axially the multiple layer metal silk screen can be set along the air channel;
Described Vickers curved sections is a contraction section, and the large end face of Vickers curved sections is connected with rectification section, and small end face is connected with test specimen Pretesting section.
Adopt the thermometric net to measure air themperature, the thermometric net is installed in respectively in the forward and backward measuring section.
Outside surface parcel one deck insulation material in described air channel.
The utility model is by blower fan and electric machine assembly air to be sucked in the air channel by the air channel inlet, air obtains heating through electric heater section, and make air themperature and speed reach all even stable through cyclone baffle plate, flow straightening grid and damping screen successively, enter the heat transmission equipment as test specimen again after the supercharging of Vickers curved surface is quickened, the heat of air in test specimen calculates by front end thermometric net T3, rear end thermometric net T4 and the measured data of gas meter V2 respectively; Medium heat in test specimen in hydraulic fluid side calculates by inlet point for measuring temperature T1, outlet point for measuring temperature T2 and the measured data of liquid flowmeter V1; Gas side and hydraulic fluid side drag characteristic are recorded by differential manometer Δ P1, Δ P2 respectively.Each heat interchanger test specimen detects through the thermal property of a plurality of different operating points, finally provides the thermal property comprehensive detection result of heat interchanger test specimen.
Compared with the prior art, the utility model beneficial effect is embodied in:
1, the utility model is provided with electric heating tube, can the air in the air channel be heated, and realizes air themperature variation from low to high by regulating heating power, can satisfy various heat exchange equipment or the same heat transmission equipment test demand under different operating modes.
2, the utility model is regulated air flow in the duct cross-section in the mode of cyclone baffle plate, flow straightening grid and damping screen combination, under the effect of cyclone baffle plate, the formation eddy flow mixes, make temperature uniformity in duct cross-section, solved air effectively through producing the problem of thermal stratification behind the well heater; Flow straightening grid plays a part guiding and cuts apart the air-flow maelstrom, and not only the vortex that baffle plate can be formed decomposes, and can also make air-flow along the air channel axia flow; Increase along with flow velocity increases damping screen to the resistance of air-flow owing to it, can effectively solve air in the problem that axle center, air channel and wind path wall face velocity do not wait, and makes the velocity field in the duct cross-section reach stable.
3, the air channel is adopted the transition of Vickers curve profile by the heavy in section to small bore in the utility model, adopt the transition of " hemispherical dome " profile by the square section to the circular section, reduce air effectively in the layering of the border at fillet surface place with in the secondary flow of transition corner, greatly reduce the pressure loss and the flow field unevenness of air in the air channel.
4, the utility model adopts the thermometric net that air themperature in the air channel is measured, and is more accurate as air themperature than some temperature in the measurement air channel.
5, the utility model increases heat-insulation layer at the air channel outside surface, with the detection error of avoiding causing because of the heat radiation of air channel wall.
Description of drawings
Fig. 1 is the prior art structural representation;
Fig. 2 is a prior art test philosophy synoptic diagram;
Fig. 3 is the utility model structural representation;
Fig. 4 is the utility model test philosophy synoptic diagram;
Fig. 5 is the utility model cyclone baffle arrangement synoptic diagram.
Number in the figure: test section, 10 circumference transition sections, 11 circle steady flow segments, 12 blower fans, 13 hydraulic fluid side thermals source, 14 liquid storage grooves, 15 triangle fair water fins behind 1 air channel inlet, 2 electric heater sections, 3 cyclone baffle plates, 4 flow straightening grids, 5 damping screens, 6 Vickers curved sections, 7 test specimen Pretesting sections, 8 test specimens, 9 test specimens.
Embodiment
Referring to Fig. 3, Fig. 4 and Fig. 5, the structure in the present embodiment is set to:
From the position of air channel inlet 1 connect successively electric heater section 2, cyclone baffle plate 3, flow straightening grid 4, damping screen 5, Vickers curved sections 6, test specimen Pretesting section 7, test specimen 8, test specimen are set after test section 9, circumference transition section 10, circle steady flow segment 11 and blower fan 12 formation air channels; The air channel is the square-section from air channel inlet to the cross section, entry position of having an area of transition section, and the air channel is exported to the fans entrance cross section and is round section from having an area of transition section.
In concrete the enforcement, the corresponding structure setting comprises:
Shown in Figure 5, cyclone baffle plate 3 is on the cross section of rectangular channel, and four triangle fair water fin 15 alternative arrangement form the eddy flow of air-flow in this cross section, and cyclone baffle plate 3 fully mixes air, has eliminated thermal stratification; Flow straightening grid 4 is with screen rectangular channel evenly to be separated into a plurality of gas channels, and the air-flow of process flow straightening grid is along the air channel axia flow; Damping screen 5 is a wire gauze, and wire netting is fixed on the madial wall of air channel, axially the multiple layer metal silk screen can be set along the air channel; The air flow field adjustment unit that is made of cyclone baffle plate, flow straightening grid and damping screen makes air flow field uniform and stable, and it is more accurate to detect; Vickers curved sections 6 is a contraction section, and the large end face of Vickers curved sections is connected with rectification section, and small end face is connected with test specimen Pretesting section; Test specimen 8 is to form the gas-liquid heat exchange equipment that heat exchanges with gas in the air channel and liquid in the reservoir; Circumference transition section 10 is to be connected with test section behind the test specimen with its rectangle end face, is connected with the inlet flange of blower fan 12 with its nose circle face.
Shown in Figure 4, the gas side air is sucked air in the air channel by blower fan 12, and through electrical heating elements 2 heating, air flow field reaches uniform and stable in rectifier cell makes the air channel, quickens through contraction section 6 superchargings, enters test specimen 8 heat exchange, discharges from the blower fan outlet.It is temperature required that the hydraulic fluid side fluid is heated to test by hydraulic fluid side thermal source 13, by pump liquid is transported to and carries out heat exchange in the test specimen, returns in the liquid storage groove 14.
The heat of air in test specimen calculates by front end thermometric net T3, rear end thermometric net T4 and the measured data of gas meter V2 respectively, adopts the thermometric net can effectively improve accuracy of detection; Medium heat in test specimen in hydraulic fluid side calculates by inlet point for measuring temperature T1, outlet point for measuring temperature T2 and the measured data of liquid flowmeter V1; Gas side and hydraulic fluid side drag characteristic are recorded by differential manometer Δ P1, Δ P2 respectively.Each heat interchanger test specimen detects through the thermal property of a plurality of different operating points, finally provides the thermal property comprehensive detection result of heat interchanger test specimen.
Claims (5)
1. air duct type heat transmission equipment thermal property pick-up unit, it is characterized in that from air channel inlet (1) connect successively electric heater section (2), cyclone baffle plate (3), flow straightening grid (4), damping screen (5), Vickers curved sections (6), test specimen Pretesting section (7), test specimen (8), test specimen are set after test section (9), circumference transition section (10), justify steady flow segment (11) and blower fan (12) formation air channel; (1) to the cross section, entry position of described circumference transition section (10) that enters the mouth from described air channel, described air channel is the square-section, and described air channel is round section from the entrance section that is exported to blower fan (12) that has an area of transition section (10).
2. air duct type heat transmission equipment thermal property pick-up unit according to claim 1 is characterized in that described electric heater section (2) is to be evenly distributed electric heating tube in rectangular channel, and the appearance of electric heating tube is provided with radiating fin; The rectangular channel front end of electric heater section (2) is connected with the air channel inlet, and the rear end is connected with the square-section at cyclone baffle plate (3) place.
3. air duct type heat transmission equipment thermal property pick-up unit according to claim 1 is characterized in that:
Described cyclone baffle plate (3) is on the cross section of rectangular channel, and four triangle fair water fins (15) alternative arrangement forms the eddy flow of air-flow in this cross section;
Described flow straightening grid (4) is with screen rectangular channel evenly to be separated into a plurality of little rectangular channels, and the air-flow that makes the process flow straightening grid is along the air channel axia flow;
Described damping screen (5) is a wire gauze, and described wire netting is fixed on the madial wall of air channel, axially the multiple layer metal silk screen can be set along the air channel;
Described Vickers curved sections (6) is a contraction section, and the large end face of Vickers curved sections is connected with rectification section, and small end face is connected with test specimen Pretesting section.
4. air duct type heat transmission equipment pick-up unit according to claim 1 is characterized in that adopting the thermometric net to measure air themperature, and the thermometric net is installed in respectively in the forward and backward measuring section.
5. air duct type heat transmission equipment pick-up unit according to claim 1 is characterized in that the outside surface parcel one deck insulation material in described air channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200068788U CN202024973U (en) | 2011-01-11 | 2011-01-11 | Thermotechnical performance detecting device of air duct type heat exchange device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200068788U CN202024973U (en) | 2011-01-11 | 2011-01-11 | Thermotechnical performance detecting device of air duct type heat exchange device |
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| CN202024973U true CN202024973U (en) | 2011-11-02 |
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| CN2011200068788U Expired - Fee Related CN202024973U (en) | 2011-01-11 | 2011-01-11 | Thermotechnical performance detecting device of air duct type heat exchange device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486714A (en) * | 2015-11-23 | 2016-04-13 | 浙江省太阳能产品质量检验中心 | Measurement apparatus for heat loss of metallic glass sealing type evacuated collector tube in high temperature state |
| CN105510379A (en) * | 2015-11-24 | 2016-04-20 | 北京航空航天大学 | A system for testing heat transfer properties of a fin of a heat exchanger |
| CN105863721A (en) * | 2016-04-13 | 2016-08-17 | 山东理工大学 | Dual reaction chamber mechanical regulation type air intake and exhaust guide system of pre-heating catalytic oxidation device |
| CN107247068A (en) * | 2017-06-02 | 2017-10-13 | 中国科学院合肥物质科学研究院 | The core body device of aluminum plate-fin heat exchanger performance test |
| CN108302974A (en) * | 2018-04-11 | 2018-07-20 | 上海核工程研究设计院有限公司 | A kind of blowing-type force ventilation seawater cooling tower air inlet optimization structure |
-
2011
- 2011-01-11 CN CN2011200068788U patent/CN202024973U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486714A (en) * | 2015-11-23 | 2016-04-13 | 浙江省太阳能产品质量检验中心 | Measurement apparatus for heat loss of metallic glass sealing type evacuated collector tube in high temperature state |
| CN105510379A (en) * | 2015-11-24 | 2016-04-20 | 北京航空航天大学 | A system for testing heat transfer properties of a fin of a heat exchanger |
| CN105510379B (en) * | 2015-11-24 | 2018-07-06 | 北京航空航天大学 | A kind of system of the heat transfer property for the fin for being used to test heat exchanger |
| CN105863721A (en) * | 2016-04-13 | 2016-08-17 | 山东理工大学 | Dual reaction chamber mechanical regulation type air intake and exhaust guide system of pre-heating catalytic oxidation device |
| CN105863721B (en) * | 2016-04-13 | 2018-03-27 | 山东理工大学 | Dual-reaction chamber preheats catalytic oxidizing equipment mechanical conditioning type intake and exhaust flow guide system |
| CN107247068A (en) * | 2017-06-02 | 2017-10-13 | 中国科学院合肥物质科学研究院 | The core body device of aluminum plate-fin heat exchanger performance test |
| CN107247068B (en) * | 2017-06-02 | 2020-04-24 | 中国科学院合肥物质科学研究院 | Core device for performance test of aluminum plate-fin heat exchanger |
| CN108302974A (en) * | 2018-04-11 | 2018-07-20 | 上海核工程研究设计院有限公司 | A kind of blowing-type force ventilation seawater cooling tower air inlet optimization structure |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111102 Termination date: 20160111 |