Measurement method for heat transfer characteristics of GHR-3K metal circular tubeMain parameters:

1: Test temperature: Difference from ambient temperature: 35-200 ℃.

2: Design a testing device based on the size of the testing tube.

The outer diameter of the sample tube is 26.3mm, the wall thickness is 3mm, and the sampling length is 500mm

3: The length of the measuring section is 200mm, and the protective sections at both ends are 150mm respectively. Low thermal conductivity insulation materials are used for insulation.

4: Adjustable metering power: 0-500W, constant current source heating. Heating power accuracy less than: ± 0.5%

5: The power heating element adopts materials with high heating efficiency.

6: Environmental temperature control accuracy: Rain ± 1 ℃

7: The heating wire power of a single tube is 1.5KW.

8: Multi channel temperature signal acquisition card, A/D conversion 16 bit,

9: Temperature control in the protective section

10: The main control method adopts computer control, data collection, analysis and processing.

11: Simple Chinese operating system, easy and clear to use.

12: Report output storage, searchable.

13: Testeable analysis: thermal conductivity, surface heat transfer coefficient, thermal conductivity, surface thermal resistance and other heat transfer characteristic parameters.

14: System accuracy due to ± 3%