Affiliation:
1. Bavarian Center for Applied Energy Research (ZAE Bayern), Am Hubland,
97174 Würzburg, Germany
Abstract
The influence of moisture in vacuum insulation panels (VIPs), with fumed silica kernels, on their thermal conductivity has been investigated. The VIPs are produced with different water contents. The thermal conductivities at different water contents are measured under stationary conditions in a hot-plate apparatus with an average temperature of 10°C (plate temperatures are 0 and 20°C). The increase in thermal conductivity is approximately proportional to the water content. The increase is ≈0.5 × 10 -3 W/(m K) per mass% of water. For typical middle European climate, a maximum moisture content of ≈6 mass% can be expected, which corresponds to a maximum increase of thermal conductivity of ≈3 × 10 -3 W/(m K) for VIPs with fumed silica kernels.
Subject
Fluid Flow and Transfer Processes,Mechanics of Materials,General Materials Science,Building and Construction
Cited by
58 articles.
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