CN105911090A - Novel heat conductivity coefficient test apparatus and heat conductivity coefficient test method - Google Patents
Novel heat conductivity coefficient test apparatus and heat conductivity coefficient test method Download PDFInfo
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- CN105911090A CN105911090A CN201610246143.XA CN201610246143A CN105911090A CN 105911090 A CN105911090 A CN 105911090A CN 201610246143 A CN201610246143 A CN 201610246143A CN 105911090 A CN105911090 A CN 105911090A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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Abstract
The invention relates to a novel heat conductivity coefficient test apparatus and a heat conductivity coefficient test method. The apparatus includes a test device, a refrigerating system, a heating system, a water circulation system and a data collection and control system. A plugging device is arranged in the test device so that the interior of a sample is isolated from a test case, thereby simulating an actual use environment of the sample. Average temperature of different positions in interior of the test device and electric power consumed within a certain time, after heat transmission of the heating system is stabilized, are tested, and two times of contrast tests with same test parameters and test methods are carried out to a sample with a heat insulation material and a sample without the heat insulation material, wherein subtraction calculation is carried out with electric power to eliminate test error, thereby accurately calculating the heat conductivity coefficient of the heat insulation material. The apparatus and the method can directly test the heat conductivity coefficient of a tubular sample. A test process is simple, is convenient to carry out, has high accuracy and greatly improves practicability of the apparatus.
Description
Technical field
The present invention relates to a kind of Novel heat-conducting coefficient testing device, particularly to directly the heat-insulation layer material of pipeline being carried out
The test device of thermal conductivity factor.
Background technology
Insulation material is the main method of pipe insulation, and the heat conductivility of insulation material is that in its performance, important parameter refers to
One of mark, therefore insulation material thermal conductivity factor is tested more accurately, has weight to the research and development of new material and the detection of performance parameters
The meaning wanted.At present, the measurement to the heat-insulation layer material thermal conductivity of pipeline, is by measuring plate test coupon, it is possible to
Accurately measure steady state heat transfer performance.But, the relative complex test step of plate test coupon is the test of insulation material heat conductivility
In the subject matter that faces.So a kind of test step of research is easy, and measurement result experimental rig accurately, have more reality
Meaning.
Summary of the invention
For problems of the prior art, it is proposed that a kind of Novel heat-conducting coefficient testing device based on steady state method,
This device directly heat-insulation layer material to pipeline carries out the measurement of thermal conductivity factor, overcomes work in existing thermal conductivity measurement method
The problem that sequence is relative complex, makes simple testing process, accurately, more meets actual requirement.
In order to realize above-mentioned requirements, the technical solution adopted in the present invention is:
A kind of Novel heat-conducting coefficient testing method and instrument, this device includes: equipment test box, refrigeration plant, firing equipment, water
Recycle unit, collection and control system, power supply.Test specimen is put in equipment test box, by firing equipment heating water tank, use water
Recycle unit makes water in the internal flow of test specimen pipeline, makes to keep in equipment test case low temperature environment by refrigeration plant, by adopting
Collection and control equipment carry out thermostatic control respectively to heating and refrigeration plant, under identical test parameters, when heating water tank and
After temperature in refrigeration case all reaches to stablize, to test specimen pipeline in the case of with insulation material and removal insulation material, point
Not measuring the electrical power consumed under its identical time, the electrical power recorded for twice carries out difference operation, eliminates test error, by institute
The data obtained are in the calculating of follow-up thermal conductivity factor.
The housing design of this equipment test box is insulation cladding, by refrigerating plant, to maintain the equilibrium of case body temperature.
Rubber layer is installed at the internal position carrying out blocking with test specimen upper and lower port of this equipment test box, and casing upper case is pacified
Dress locking device, so that measured tube keeps sealing state in pipe in process of the test.
The inside and outside wall of chamber, boiler and measured tube installs multiple temperature sensors, by its each position of computation and measurement
Mean temperature, with satisfied control and the needs of subsequent calculations.
This equipment is designed with protection device, carrys out appearance in protection test by water level limiter and draining valve in water tank
During unexpected situation, test can be stopped in time and process.
The method utilizing the heat transfer coefficient of above-mentioned Novel heat-conducting coefficient testing device based on steady state method measurement insulation material
Comprise the steps:
The insulating tube of band heat-insulation layer is put into equipment box, makes chamber temperature and boiler temperature each reach uniform；Treat
After heat transfer is stable, the power P consumed by boiler in power meter measures certain time1 , by temperature sensor measurement quilt
Mean temperature t of the inside and outside wall of test tube1、t2、t3；The insulating tube removing heat-insulation layer is put in equipment, with identical experimental condition
Under, to be passed thermally-stabilised after, measure the power P that boiler in the identical time is consumed2。
According to Fourier law formula (II), the heat flow drawn during without heat-insulation layer such as formula (1) is described:
(1)
The heat flow drawn when having heat-insulation layer such as formula (2) is described:
(2)
By what law of conservation of energy, the heat flow that the electrical power consumed is conducted by test specimen and process of the test were lost
Heat flow sum, it may be assumed that、.And twice test is under identical test parameter, identical test method
Carrying out, the heat therefore lost is identical, i.e., the power recorded twice carries out difference operation and obtains formula (3)
As described below:
(3)
Being brought into formula (3) by formula (2) again, to obtain formula (4) as described below:
(4)
In formula (4), λ is the thermal conductivity factor of measured tube；Q is heat flow, the difference of electrical power try to achieve；t1For table in tested heat-insulation layer
The average surface temperature in face, is obtained by temperature sensor；t3For the average surface temperature of tested heat-insulation layer outer surface, temperature pass
Sensor obtains；r1Average inner circle radius for tested pipeline inner surface；r2Average inner circle radius for tested heat-insulation layer；r3 For quilt
Survey the average exradius of heat-insulation layer.
The invention has the beneficial effects as follows, by carrying out that successively twice test method be identical, test parameters is identical to having a competition
Test, then the electrical power numerical value twice test tried to achieve carry out difference operation, eliminate the test error caused due to test loss,
Measure the thermal conductivity factor of insulation material the most accurately.
Below in conjunction with the accompanying drawings the apparatus and method of the insulation material thermal conductivity factor of the present invention are described further.
Accompanying drawing explanation
Fig. 1 is the front section view of the thermal conductivity factor device of the present invention.
Fig. 2 is the top view of the thermal conductivity factor device of the present invention.
Wherein, reference, 1 equipment test box, 2 rubber closure end caps, 3 utilidors, 4 insulating tube heat-insulation layers, 5 temperature
Sensor, 6 hot water pipelines, 7 water pumps, 8 firing equipments, 9 boilers, 10 power meters, 11 water filling ports, 12 draining valves, 13 water level limits
Position device, 14 refrigeration plants, 15 gather and control system, 16 air bleeding valves.
Detailed description of the invention
In FIG, equipment test box 1 simulates the actual application environment of utilidor, surveys the thermal conductivity factor of test specimen
Amount.The central authorities of the rubber closure end cap in equipment test box 1 put into by test specimen, the upper box lid of equipment test box 1 enter test specimen
The fixing closure of row, the temperature of equipment test box 1 is measured by multiple temperature sensors 5, and is transferred data to gather and control system
15, controlled refrigeration plant 14 by gathering with control system 15, to maintain the temperature of equipment test box 1 to reach balance.Boiler 9 mould
Intend the actual temperature within utilidor, firing equipment 8 boiler 9 has been heated, multiple temperature sensors 5 carried out
Temperature survey, and transfer data to gather and control system 15, controlled firing equipment 8 by gathering with control system 15, to maintain
The temperature of test specimen pipe interior reaches balance, is measured, by power meter 10, the electrical power that firing equipment 8 is consumed simultaneously.Test specimen interior
Being placed with multiple temperature sensor 5 on surface and outer surface, transmission temperature data, to gathering and control system 15, calculates inner surface
With the mean temperature of outer surface, in the calculating of thermal conductivity factor.
The present invention is Novel heat-conducting coefficient testing device based on steady state method, and test device should meet claimed below:
Equipment test case temperature: equipment test case Inside Air Temperature should equalize, the adjustable range of temperature is (-15～room temperature)
℃；Water temperature within measured tube is constant, can be full of, without air, and lower water temperature scope is (room temperature～80) DEG C.
Method of testing requires: the temperature at each position of equipment is recorded by 10 temperature sensors altogether, wherein equipment test box
Internal 2, boiler 2, the inner surface of test specimen and each 3 of outer surface, after diabatic process is stable, measure one every 10min
Subparameter t1 、t2 、t3 、P1、P2, to survey 6 times altogether, test period is 1h.
Claims (2)
1. a Novel heat-conducting coefficient testing device, it is characterised in that: this device includes equipment test box (1), firing equipment
(8), refrigeration plant (14), collection and control system (15), boiler (9)；Closure end cap (2) it is provided with in equipment test box (1),
Make that test specimen is internal is in isolation with test box, imitation specimen use environment in practice, by temperature sensor (5) and
The data that power meter (10) records are delivered to gather and in control system (15), based on the thermal conductivity factor of follow-up insulation material
Calculate.
A kind of Novel heat-conducting opening machine system test device the most according to claim 1, tests the test specimen to band insulation material and not
Test specimen with insulation material carries out the contrast test that test parameters is identical, test method is identical twice, by measuring twice test
The electrical power that in certain time, heating system is consumed after heat transfer is stable, and the electrical power tried to achieve is carried out difference operation, eliminate
Test error, calculates the thermal conductivity factor of insulation material accurately.
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| CN201610246143.XA CN105911090A (en) | 2016-04-20 | 2016-04-20 | Novel heat conductivity coefficient test apparatus and heat conductivity coefficient test method |
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| CN201610246143.XA CN105911090A (en) | 2016-04-20 | 2016-04-20 | Novel heat conductivity coefficient test apparatus and heat conductivity coefficient test method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106442613A (en) * | 2016-09-22 | 2017-02-22 | 西华大学 | Bench and method for testing heat conductivity coefficient of heat exchange tube of EGR cooler |
| CN107764860A (en) * | 2017-12-19 | 2018-03-06 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of laminated core longitudinal direction test device of thermal conductivity coefficient |
| CN108680600A (en) * | 2018-05-18 | 2018-10-19 | 河北世纪建筑材料设备检验有限公司 | A kind of new material test device and test method |
| CN111521636A (en) * | 2020-05-12 | 2020-08-11 | 葛浩 | Small simulation device for thermal insulation performance of thermal pipeline and use method |
| CN112782212A (en) * | 2020-12-29 | 2021-05-11 | 安徽应流集团霍山铸造有限公司 | Nuclear power metal heat preservation heat transfer performance test device |
| CN113588710A (en) * | 2021-09-29 | 2021-11-02 | 武汉祺璞科技有限公司 | Component concentration detection device and method for mixed gas and application |
| CN114428102A (en) * | 2022-01-17 | 2022-05-03 | 哈尔滨工业大学 | Device and method for measuring high-low temperature heat conductivity physical property parameters of anisotropic material |
| CN114813200A (en) * | 2022-07-01 | 2022-07-29 | 中国飞机强度研究所 | Device and method for measuring high-temperature characteristics of airplane component |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106442613A (en) * | 2016-09-22 | 2017-02-22 | 西华大学 | Bench and method for testing heat conductivity coefficient of heat exchange tube of EGR cooler |
| CN107764860A (en) * | 2017-12-19 | 2018-03-06 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of laminated core longitudinal direction test device of thermal conductivity coefficient |
| CN108680600A (en) * | 2018-05-18 | 2018-10-19 | 河北世纪建筑材料设备检验有限公司 | A kind of new material test device and test method |
| CN108680600B (en) * | 2018-05-18 | 2021-05-07 | 河北世纪建筑材料设备检验有限公司 | Novel material testing device and testing method |
| CN111521636A (en) * | 2020-05-12 | 2020-08-11 | 葛浩 | Small simulation device for thermal insulation performance of thermal pipeline and use method |
| CN112782212A (en) * | 2020-12-29 | 2021-05-11 | 安徽应流集团霍山铸造有限公司 | Nuclear power metal heat preservation heat transfer performance test device |
| CN113588710A (en) * | 2021-09-29 | 2021-11-02 | 武汉祺璞科技有限公司 | Component concentration detection device and method for mixed gas and application |
| CN113588710B (en) * | 2021-09-29 | 2022-01-21 | 武汉祺璞科技有限公司 | Component concentration detection device and method for mixed gas and application |
| CN114428102A (en) * | 2022-01-17 | 2022-05-03 | 哈尔滨工业大学 | Device and method for measuring high-low temperature heat conductivity physical property parameters of anisotropic material |
| CN114428102B (en) * | 2022-01-17 | 2024-02-23 | 哈尔滨工业大学 | Device and test method for measuring high-low temperature heat conduction physical property parameters of anisotropic material |
| CN114813200A (en) * | 2022-07-01 | 2022-07-29 | 中国飞机强度研究所 | Device and method for measuring high-temperature characteristics of airplane component |
| CN114813200B (en) * | 2022-07-01 | 2022-10-04 | 中国飞机强度研究所 | Device and method for measuring high-temperature characteristics of airplane component |
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Application publication date: 20160831 |
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