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仪器网/ 行业应用/ 解决方案/ 真空绝热板出厂质量控制的快速无损热检测

真空绝热板出厂质量控制的快速无损热检测

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Thermal conductivity is a critical thermophysical property to be measured during the production
of vacuum insulation panels (VIP). In the past quality control testing has been limited to guarded
hot plate testing, however this method is not only time consuming, but also has size constraints
where a sample must be mocked up in order to evaluate. A fast, new and non-destructive
instrument for evaluating the thermal conductivity of encapsulated materials has been developed
without sample preparation or sample size constraints.
This study focused on optimizing the instruments three critical parameters: start time, test time
and coo领 time. Dozens of combinations were tried in order to determine the best testing
protocol for quickly and efficiently screening panels on a pass/fail basis. A criterion for the
pass/fail line was based on the need for low initial internal pressure in VIPs for appliance use to
insure long effective life. The test parameters that resulted from the optimization step allow for a
maximum of 4000 panels per month to be tested, given a two shift working schedule. This
results in a test cycle times of less than one minute. TCi导热系数仪
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