CN203287340U - Test device for heat transfer performance of gravity heat pipe - Google Patents
Test device for heat transfer performance of gravity heat pipe Download PDFInfo
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- CN203287340U CN203287340U CN2013203112654U CN201320311265U CN203287340U CN 203287340 U CN203287340 U CN 203287340U CN 2013203112654 U CN2013203112654 U CN 2013203112654U CN 201320311265 U CN201320311265 U CN 201320311265U CN 203287340 U CN203287340 U CN 203287340U
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- temperature control
- heat pipe
- control bucket
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Abstract
The utility model relates to a test device for heat transfer performance of a gravity heat pipe. The structural characteristics of the test device lie in that an upper temperature control barrel and a lower temperature control barrel are connected with a cold bath respectively to carry out independent temperature control for a condensation section and an evaporation section of the gravity heat pipe; accurate control for an inclined angle of the gravity heat pipe is realized by mutually cooperation of a support, a belt braking hand winch, a hoisting frame, a steel strand and an inclinometer of the test device; temperature sensors are arranged in the upper and lower temperature control barrels, on the surface of the gravity heat pipe and in the cold bath liquid; heat flux sensors are distributed on the surface of the gravity heat pipe; and test data of the temperature sensors and the heat flux sensors are automatically collected by a data collector and a computer. The test device can adjust the inclined angle of the gravity heat pipe freely in a range from 0 degrees to 90 degrees, and further realizes accurate test for the heat transfer performance of the gravity heat pipe in different inclined angles, and provides a test basis and technical parameters for fully playing engineering efficiency of the gravity heat pipe.
Description
Technical field
The utility model relates to a kind of heat transfer performance test proving installation, especially a kind of gravity assisted heat pipe heat transfer performance test device.Can effectively measure the heat transfer property of gravity assisted heat pipe under the working conditions such as different structure, working medium, filling amount and angle of inclination, for the engineering usefulness of giving full play to gravity assisted heat pipe provides experimental basis and technical parameter.
Background technology
Heat pipe is a kind of efficient heat transfer element, and its principle of work is mainly to utilize the evaporation of self internal working medium and condensation to realize the heat transmission.Hot pipe technique has a wide range of applications in the fields such as space exploration, cold district engineering, Industrial Engineering and medical treatment, all many-sides such as the energy-conservation product such as the aircraft temperature is controlled such as being applied to, the frozen soil engineering heating power stability protection of cold district, heat interchanger and liquid nitrogen heat pipe surgical device.
Gravity assisted heat pipe claims again two-phase closed type hot siphon; it is a kind of heat pipe of Permafrost Area widespread use; frozen soil big countries such as the U.S., Canada, Russia has adopted this kind hot pipe technique in a large number in its cold district's engineering construction,, for the protection of frozen soil, guarantee the stable of engineering.And the great road project in cold district such as the Qinghai-Tibet Railway of China, Qinghai-Tibet Highway with safeguard; gravity assisted heat pipe has also obtained application more widely; and engineering effort is good, so this technology also is expected to become a kind of important frozen earth roadbed engineering protection measure in the expressway construction of the Qinghai-Tibet in future.Because the cost of gravity assisted heat pipe is relatively high, this just requires us must bring into play to greatest extent its task performance, saves construction costs.
The structure of several factors such as gravity assisted heat pipe, working medium, filling amount, angle of inclination etc. all can affect its heat transfer property.And best for gravity assisted heat pipe serviceability under which kind of working condition at present, still there is very large dispute.Such as, in cold district subgrade engineering, the result of study at the relevant reasonable inclination angle of gravity assisted heat pipe just has several: (the Yang Yongpings etc. such as 70 ° ~ 90 °, 40 ° ~ 80 ° and 25 ° ~ 30 °, the numerical analysis of Proper Thermosyphon Inclination Angle Used in Permafrost Embankment, China's railway society, 2006,27(3): 1-7).In order to consider many factors that affects the gravity assisted heat pipe duty, give full play to its task performance, be the engineering demand service better, effective gravity assisted heat pipe heat transfer performance test device reasonable in design is very important.Yet, at present the efficiency test test of gravity adopting heat pipes for heat transfer performance be there is no simple method.
Summary of the invention
For improving the heat transfer property of Permafrost Area gravity assisted heat pipe, reduce construction costs, the utility model provides a kind of gravity assisted heat pipe heat transfer performance test device.This test unit is independently controlled the temperature of gravity assisted heat pipe condensation segment and evaporator section by cryostat, gravity assisted heat pipe is rotated freely in 0 ° ~ 90 ° scopes, adjust angle of inclination, and adopt the size Control device to realize the heat transfer property of different tube diameters gravity assisted heat pipe is tested.This test unit has test accurately, the advantages such as easy operating.
The technical scheme that the utility model adopts is:
A kind of gravity assisted heat pipe heat transfer performance test device, be comprised of support, stop formula hand winch, hoisting frame, steel strand wires, inclinator, screens, upper temperature control bucket, lower temperature control bucket, A-frame, seal flange, joint flange, guide pole, sealing shroud, temperature sensor, heat flux sensor, 1# cryostat, 2# cryostat, cryostat liquid, cryostat liquid interface, catheter, data acquisition unit and computing machine of band.Hoisting frame and support are hinged, and support is provided with screens, and upper temperature control bucket and lower temperature control bucket are fixedly in screens.Upper temperature control bucket and lower temperature control bucket are cylindrical or polyhedron shape; Its outer end is equipped with seal flange, and the inner is equipped with joint flange, between connect with joint flange and by guide pole, gravity assisted heat pipe is fixed on upper temperature control bucket and lower temperature control bucket axis by A-frame, and between joint flange and gravity assisted heat pipe, sealing shroud is set; Inclinator is positioned at the temperature control bottom of the barrel, occupy on hoisting frame, be equipped with the cryostat liquid interface at upper temperature control bucket and lower temperature control bucket two ends, be furnished with respectively temperature sensor and heat flux sensor in upper temperature control bucket and lower temperature control bucket, temperature sensor is laid in gravity assisted heat pipe surface and cryostat liquid, and heat flux sensor is laid in the gravity assisted heat pipe surface; Fill cryostat liquid in 1# cryostat and 2# cryostat, cryostat liquid can be alcohol or kerosene or freon, by catheter and cryostat liquid interface, is connected respectively to upper temperature control bucket and lower temperature control bucket; Upper temperature control bucket is connected by wire and is connected with data acquisition unit with heat flux sensor with the temperature sensor in lower temperature control bucket, and data acquisition unit is connected with computing machine by wire again.
The beneficial effect of advantage of the present utility model and generation is:
1, the heat flux sensor of the utility model employing is gentle formula, can test the gravity assisted heat pipe heat transfer property of various different tube diameters, but this sensor close and firm be laid in the gravity assisted heat pipe outer wall, the changes of heat flux of Measurement accuracy gravity assisted heat pipe outside surface, significantly improved the measuring accuracy to the gravity assisted heat pipe hot-fluid.
2, the utility model can freely be adjusted the angle of inclination of gravity assisted heat pipe in 0 ° ~ 90 ° scopes, and then realizes the accurate test to gravity assisted heat pipe heat transfer property under differing tilt angles.
3, the utility model is realized measurement to different tube diameters gravity assisted heat pipe heat transfer property by the sealing shroud of changing joint flange, and is simple.
4, the utility model all adopts the mode that cryostat liquid independent loops flows in the temperature control bucket of up and down, realizes the independent temperature control to gravity heat pipe condenser section and evaporator section, can carry out the test of gravity assisted heat pipe heat transfer property under constant temperature operating modes different from alternating temperature.
5, the utility model also can be tested the heat transfer property of the gravity assisted heat pipes such as different filling amounts, different working medium types, realizes the comprehensive optimal design to gravity assisted heat pipe, and then provides technical support for the widespread use of hot pipe technique.
6, simple in structure, the easy operating of the utility model, measurement are accurate, and working environment is required low, working stability.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the vertical view of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further again:
As shown in Figure 1 and 2, a kind of gravity assisted heat pipe heat transfer performance test device, be comprised of support 1, stop formula hand winch 2, hoisting frame 3, steel strand wires 4, inclinator 5, screens 6, upper temperature control bucket 7, lower temperature control bucket 8, A-frame 9, seal flange 10, joint flange 11, guide pole 12, sealing shroud 13, temperature sensor 14, heat flux sensor 15, upper cryostat 16,1 # cryostat 16,2# cryostat 17, cryostat liquid interface 19, catheter 20, data acquisition unit 21 and computing machine 22 of band.Hoisting frame 3 is hinged with support 1, can rotate freely, and which is provided with four screens 6, is used for fixing upper temperature control bucket 7 and lower temperature control bucket 8, and upper temperature control bucket 7 and lower temperature control bucket 8 are cylindrical, internal diameter 0.30 m, and wall thickness 0.01 m, two temperature control bucket length are 0.81 m.The outer end of upper temperature control bucket 7 and lower temperature control bucket 8 is equipped with seal flange 10, the inner is equipped with joint flange 11, connect with joint flange 11 and by guide pole 12 between two temperature control buckets, gravity assisted heat pipe 23 is fixed on upper temperature control bucket 7 and lower temperature control bucket 8 axis by six A-frames 9; , for guaranteeing the sealing of up and down temperature control bucket 8, between joint flange 11 and gravity assisted heat pipe 23, sealing shroud 13 is set.Inclinator 5 is positioned at temperature control bucket 7 bottoms, occupy on hoisting frame 3, hoisting frame 3 is by matching and realize accurate control to the gravity assisted heat pipe angle of inclination with stop formula hand winch 2, steel strand wires 4 and inclinator 5 of band, the adjustable-angle scope is 0 ° ~ 90 °, and its medium-height trestle 1, hoisting frame 3, upper temperature control bucket 7, lower temperature control bucket 8, three-legged support 9, seal flange 10, joint flange 11 and guide pole 12 steel used are Q235.Be equipped with cryostat liquid interface 19 at upper temperature control bucket 7 and lower temperature control bucket 8 two ends, upper temperature control bucket 7 and the interior laying temperature sensor 14 of lower temperature control bucket 8 and heat flux sensor 15, temperature sensor 14 is laid in gravity assisted heat pipe 23 surfaces and cryostat liquid 18, be used for gravity assisted heat pipe surface and the measurement of cryostat liquid temp on every side, heat flux sensor 15 is laid in gravity assisted heat pipe 23 surfaces, for flexible bendable, rectangle, and length≤0.15 m, be used for the monitoring that the gravity assisted heat pipe surface heat flow is changed.Fill cryostat liquid 18 in 1 # cryostat 16 and 2# cryostat 17, cryostat liquid 18 is alcohol, by catheter 20 and cryostat liquid interface 19, is connected respectively to upper temperature control bucket 7 and lower temperature control bucket 8, and the circulation by cryostat liquid realizes the independent temperature control to two temperature control buckets.Upper temperature control bucket 7, lower temperature control bucket 8 and catheter 20 outer walls arrange the PVC insulation material, carry out heat-insulation and heat-preservation.Insulation material thickness 〉=5 cm, coefficient of heat conductivity≤0.025 W/(m ℃), upper temperature control bucket 7 is connected with heat flux sensor and is connected with data acquisition unit 21 by wire with the temperature sensor 14 in lower temperature control bucket 8, data acquisition unit 21 is connected with computing machine 22 by wire again, realizes the automatic collection to test figure.
This test unit carries out independent temperature control by cryostat and temperature control bucket to gravity heat pipe condenser section and evaporator section, utilize temperature sensor and heat flux sensor in the temperature control bucket to monitor temperature and the heat flow density variation of gravity heat pipe condenser section and evaporator section, thereby determine the heat transfer property of gravity assisted heat pipe under different working conditions.
Claims (1)
1. gravity assisted heat pipe heat transfer performance test device, by support (1), be with the formula hand winch (2) of stopping, hoisting frame (3), steel strand wires (4), inclinator (5), screens (6), upper temperature control bucket (7), lower temperature control bucket (8), A-frame (9), seal flange (10), joint flange (11), guide pole (12), sealing shroud (13), temperature sensor (14), heat flux sensor (15), 1# cryostat (16), cryostat under 2# (17), cryostat liquid (18), cryostat liquid interface (19), catheter (20), data acquisition unit (21) and computing machine (22) form, it is characterized in that: hoisting frame (3) is hinged with support (1), support (1) is provided with screens (6), be used for fixing upper temperature control bucket (7) and lower temperature control bucket (8), upper temperature control bucket (7) and lower temperature control bucket (8) are cylindrical, or polyhedron shape, its outer end is equipped with seal flange (10), the inner is equipped with joint flange (11), between connect with joint flange (11) and by guide pole (12), gravity assisted heat pipe (23) is fixed on upper temperature control bucket (7) and lower temperature control bucket (8) axis by A-frame (9), and between joint flange (11) and gravity assisted heat pipe (23), sealing shroud (13) is set, inclinator (5) is positioned at temperature control bucket (7) bottom, occupy on hoisting frame (3), be equipped with cryostat liquid interface (19) at upper temperature control bucket (7) and lower temperature control bucket (8) two ends, and be furnished with respectively temperature sensor (14) and heat flux sensor (15) in upper temperature control bucket (7) and lower temperature control bucket (8), temperature sensor (14) is laid in gravity assisted heat pipe (23) surface and cryostat liquid (18), and heat flux sensor (15) is laid in gravity assisted heat pipe (23) surface, fill cryostat liquid (18) in 1# cryostat (16) and 2# cryostat (17), cryostat liquid (18) can be alcohol or kerosene or freon, by catheter (20) and cryostat liquid interface (19), is connected respectively to upper temperature control bucket (7) and lower temperature control bucket (8), upper temperature control bucket (7) is connected 15 with the temperature sensor (14) in lower temperature control bucket (8) with heat flux sensor) be connected with data acquisition unit (21) by wire respectively, data acquisition unit (21) is connected with computing machine (22) by wire again.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203112654U CN203287340U (en) | 2013-05-31 | 2013-05-31 | Test device for heat transfer performance of gravity heat pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203112654U CN203287340U (en) | 2013-05-31 | 2013-05-31 | Test device for heat transfer performance of gravity heat pipe |
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| CN203287340U true CN203287340U (en) | 2013-11-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215656A (en) * | 2013-05-31 | 2014-12-17 | 中国科学院寒区旱区环境与工程研究所 | Adjustable and controllable apparatus for measuring heat transfer efficiency of gravity heat pipe |
| CN107356626A (en) * | 2017-07-19 | 2017-11-17 | 中国科学院寒区旱区环境与工程研究所 | A kind of round-the-clock Frozen Ground Area heat pipe floor data detection means |
| CN107389727A (en) * | 2017-07-19 | 2017-11-24 | 中国科学院寒区旱区环境与工程研究所 | A kind of Frozen Ground Area heat pipe floor data detection means based on temperature differential method |
-
2013
- 2013-05-31 CN CN2013203112654U patent/CN203287340U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215656A (en) * | 2013-05-31 | 2014-12-17 | 中国科学院寒区旱区环境与工程研究所 | Adjustable and controllable apparatus for measuring heat transfer efficiency of gravity heat pipe |
| CN107356626A (en) * | 2017-07-19 | 2017-11-17 | 中国科学院寒区旱区环境与工程研究所 | A kind of round-the-clock Frozen Ground Area heat pipe floor data detection means |
| CN107389727A (en) * | 2017-07-19 | 2017-11-24 | 中国科学院寒区旱区环境与工程研究所 | A kind of Frozen Ground Area heat pipe floor data detection means based on temperature differential method |
| CN107356626B (en) * | 2017-07-19 | 2023-08-22 | 中国科学院西北生态环境资源研究院 | All-weather frozen soil region heat pipe working condition data detection device |
| CN107389727B (en) * | 2017-07-19 | 2023-09-01 | 中国科学院西北生态环境资源研究院 | Frozen soil area heat pipe working condition data detection device based on temperature difference method |
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