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A study of the through-plane thermal conductivity of various gas diffusion layer materials (GDL) and the thermal contact resistance between the GDL and an electrolytic iron surface as a function of compression load. These factors were anaylized with the intention of gaining knowledge about in-situ fuel cells. Thermal conductivity measurements were taken by a modified version of the guarded heat flux meter ...
In an environment that experiences drastically changing temperatures it is potentially more energy efficient to use insulative walls that can change their apparent thermal conductivities. This paper suggests a nano-porous material able to change its thermal conductivity by a factor of 3 varying the pressure upon it from 1 to 100 kPa. Thermal conductivity measurements are made in-situ by an airtight guarded heat flow meter....
Thermal adhesives that contain large proportions of high thermal conductivity filler materials are extremely useful in electronics and manufacturing. Due to the importance of these fillers it is crucial to know their exact properties. Five adhesives are examined for their thermal conductivities. These values were obtained using a guarded heat flow meter with a method following the ASTM test standard. This method ...
Thermal management is extremely important for large size batteries, however, inaccurate values have been used in the past for modeling. This paper investigates the thermal conductivity of the composite cathodes. This knowledge is needed to find the true thermal properties of lithium polymer batteries. The guarded heat flow meter was used to find these values, achieving a 5% precision in measurement. The measurements ...
The through-plane thermal conductivity of many components of a fuel cell, dry NafionĀ®, various diffusion medias and catalyst layers are studied. The thermal contact resistance between the diffusion media and a metal plate with respect to temperature and pressure was also determined. The measurements were made with a guarded heat flow meter device. The least accurate measurement was of the Toray carbon ...
