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导热系数测试仪器

高温热流计法导热仪


High Temperature  Heat Flow Meter(TC-HFM-1000)


Innovative High Temperature Heat Flow Meter System for Determination of

Thermal Conductivity of Insulations



一、简介 (INTRODUCTION)


热流计法高温导热系数测试系统是业内第一台热流计法高温热导率测量装置,首次实现了1000℃以下防隔热材料的高温导热系数测量,同时在测量过程中还可以精确模拟气氛环境,全过程的获得材料导热系数随温度和气压变化的性能曲线。


依阳公司出品的热流计法高温导热系数测试系统依据ASTM C201、ASTM C518和GB 10295-2008标准测试方法,是一个标准的稳态法导热系数测试系统。当被测试样上下的热面和冷面在恒定温度状态下,在被测试样的中心区域和热流测量装置的中心区域会建立起类似于无限大平板中存在的单向稳态热流。通过测量热流密度、试样的热面和冷面温度以及试样厚度获得被测试样的等效导热系数。




High temperature Heat flow meter method conductivity test system is the industry's first heat flow meter method high temperature thermal conductivity measuring device, for the first time, the thermal conductivity measurement of the insulation under 1000 ℃ is realized, and the atmosphere environment can be simulated accurately during the measurement, and the performance curve of material thermal conductivity varies with temperature and pressure.


The thermal conductivity test system produced by EYOUNG Company is a standard steady-state thermal conductivity test system according toASTM C201、ASTM C518 andGB 10295-2008 standard test method. When the hot and cold surfaces of the tested sample are in constant temperature state, the unidirectional steady heat flow in the center area of the tested sample and the central region of the heat flow measuring device will be established. The equivalent thermal conductivity of the sample is obtained by measuring the heat flux density, the hot surface and the temperature of the specimen and the thickness of the specimen.





二、技术指标(Technical Data)


(1)被测对象(Test Materials):刚性和柔性板状材料(Rigid and flexible sheet insulation material)。

(2)温度范围(Temperature Range):100℃~1000℃

(3)气压范围(Gas Pressure Range):10Pa~1atm

(4)导热系数测试范围(Thermal Conductivity Range):<1W/mK。

(5)试样尺寸(Sample Size):正方形(Square)300×300mm

(6)试样厚度范围(Thickness):10~70mm。

(7)温度测量精度(Temperature Accuary):±1%。

(8)气压测量精度(Pressure/Vacuum Accuary):±1%

(9)导热系数测量精度(Thermal Conductivity Accuary):±5%。


三、特点(Main Feature)


1. 单试样测量模式,减少了试验过程中对试样的要求,更便于试验操作。

The single sample measuring mode reduces the requirements of the sample during the test, and is more convenient for the test operation.


2. 采用依阳公司出品的高精度气压控制系统,使得被测试样处于精确控制的气压环境中,由此来模拟不同气氛环境和不同空间高度时材料所处的状态,更准确的对材料的导热系数性能进行测试评价。

Based on the high precision vacuum control system produced by the Eyoung Company, the test sample is in the accurate control of the gas pressure environment, thus simulating different atmosphere environment and different space height of the material in the state, more accurate performance of the thermal conductivity of the material test evaluation.


3. 按照标准测试方法的规定,试样冷热面温度必须均匀,试样上下两个面的温度波动不超过±1%,目前国内外的高温导热系数测试设备都无法实现此要求,都是采用单面整体加热,试样热面无法保证均匀。试样热面温度的不均匀一是会在试样上产生热应力而造成试样变形,二是无法测量较厚板状试样,三是会带来严重的测量误差。依阳公司出品的导热系数测试系统则采用了高温护热加热方式,使得试样热面温度均匀性满足标准方法要求,由此在保证测量精度的前提下可以测量较厚的平板试样,更能满足工程结构件的整体测量。

According to the standard test method, the sample heat and cold surface temperature must be uniform, the sample two surface temperature fluctuation does not exceed ±1%, at present at home and abroad high temperature thermal conductivity test equipment can not achieve this requirement, are using a single side of the whole heating, the sample hot surface can not guarantee uniformity. The uneven temperature of the specimen is one of the thermal stress on the specimen, which results in the deformation of the specimen, the second is the inability to measure the thicker plate specimen, and the third is the serious measurement error. The thermal conductivity test system produced by Eyoung Company adopts high temperature heating mode, which makes the temperature uniformity of the sample hot surface meet the standard method requirement, thus the thickness of flat specimen can be measured under the precondition of guaranteeing the measurement precision, which can meet the overall measurement of engineering structural parts.


4. 热流计法高温导热系数测试系统可以在试样厚度方向上形成巨大的温度梯度,最大温度梯度可以达到900℃以上,由此来真实模拟和测量隔热材料在实际使用条件下的材料隔热性能。采用了不到1mm厚的薄膜热流计来测量流经整体试样的热流密度,有效保证了试样上大的温度梯度实现。由于此测试系统可以实现最大70mm厚的试样测量,可以通过调整试样厚度和层数进行不同温度梯度下的热导率测试,试验条件和测试参数的设计更灵活,可以满足不同测试条件的需要。

Heat flow meter method high temperature thermal conductivity test system can form a large temperature gradient in the thickness direction of the specimen, the maximum temperature gradient can reach more than 900 ℃, thus the real simulation and measurement of thermal insulation materials under the actual use of material insulation properties. A thin film heat flow meter with less than 1mm thickness is used to measure the heat flux through the whole specimen, and the large temperature gradient of the specimen is ensured. As the test system can achieve the maximum 70mm thickness of the sample measurement, can adjust the thickness of the sample and the number of layers of thermal conductivity under different temperature gradients, test conditions and test parameters of the design more flexible, can meet the needs of different test conditions.


5. 材料在高温条件下会发生热膨胀现象,特别是低密度类隔热材料的热膨胀系数更是很大,因此在实际测试过程中,通常所进行的室温条件下试样厚度测试数据并不能代表实际测试过程中的试样厚度,而试样厚度的准确与否对导热系数测量精度有严重影响。依阳公司出品的高温导热系数测试系统配备了激光在线试样厚度测量装置,可以在整个测试过程中实时监测试样的厚度变化,保证了测量准确性。

The thermal expansion of materials in high temperature conditions, especially the low density insulation materials, the thermal expansion coefficient is very large, so in the actual test process, the normal temperature in the sample thickness test data does not represent the actual test process of the sample thickness, The accuracy of the measurement of thermal conductivity is seriously affected by the accuracy of specimen thickness. The high temperature thermal conductivity test system produced by Eyoung Company is equipped with the laser on-line specimen thickness measuring device, which can monitor the thickness change of the specimen in real time during the whole testing process, and ensure the measurement accuracy.


四、技术资料(Technological Notes)


(1)GB/T 10295-2008 绝热材料稳态热阻及有关特性的测定 热流计法

        Thermal Insulation--Determination of Steady State Thermal Resistance and Related Properties--Heat Flow Meter Apparatus

(2)热流计法高温热导率测试系统设计--均热板的热模拟计算分析

        Design of High Temperature Thermal Conductivity Test System Based on Heat Flow Meter Method--Thermal Simulation Calculation and Analysis of Uniform Hot Plate

(3)气压对材料热导率测试影响的试验研究

        Experimental Study on the Influence of Air Pressure on the Thermal Conductivity Test of Materials

(4)真空隔热板(VIP)及其墙体导热系数和热阻测试方案设计

        Design of Thermal Conductivity and Thermal Resistance Test Scheme for Vacuum Insulation Plate (VIP) and Its Wall

(5)热流计法测试低密度刚性隔热瓦高温有效导热系数

        Effective Thermal Conductivity Measurements of Low Density Thermal Insulation Rigid Tiles Using Heat Flux Method
(6)不同真空度下石墨硬毡热流计法高温导热系数测量

        Effective Thermal Conductivity Measurements of Rigid Graphite Felt In the Vacuum Using Heat Flux Method

(7)耐火隔热材料测试中有效导热系数与真导热系数的相互关系研究

        Research on the Relationship Between Effective Thermal Conductivity and True Thermal Conductivity in the Test of Refractory Insulation

(8)纤维类隔热材料有效导热系数与真导热系数相互关系的试验验证

        Experimental Verification of the Relationship Between Effective Thermal Conductivity and True Thermal Conductivity of Fiber Insulation

(9)碳纤维隔热保温材料在真空和惰性气体环境下高温导热系数测试技术

        Test Technique for Thermal Conductivity of Carbon Fiber Insulator in High Temperature Vacuum and Inert Gas Environment