Thermal conductivity measuring method and apparatus, and gas...

Details Thermal conductivity measuring method and apparatus, and gas... Thermal conductivity measuring method and apparatus, and gas...

2011-04-19

2011-04-19

Williams, Hezron (Department: 2856)

Measuring and testing

Gas analysis

By thermal property

Reexamination Certificate

active

07926323

ABSTRACT:
A heat radiation coefficient C [=Ph/(Th−To)] from a microheater is calculated in accordance with a power Ph applied to the microheater which is supported in air and provided in an ambient gas, a heater temperature Th, and an ambient temperature To at this moment. Further, a thermal conductivity λ(T)of the ambient gas is obtained from the calculated heat radiation coefficient C based on a proportional relation [C=K·λ(T)] between a thermal conductivity λ(T)of the ambient gas and the heat radiation coefficient C at a measurement temperature T [=(Th−To)/2].

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