Preliminary Study on Thermal Conductivity of Insulating Board in the Channel Anti-frost-heavy Practice
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Abstract:
The testing results of thermal conductivity of the extruded polystyrene (XPS) insulating board during the construction of Jiaozuo 1st engineering project in the Middle Route of South-to-North Water Diversion Project did not meet the technical requirements. In order to determine the effects of thermal conductivity of the XPS insulating board on channel anti-frost-heavy and to coordinate the relationships between project entity, design, management, and construction, the thickness of XPS insulating board was inversely calculated based on the analysis of test report, method, and instrument and the related national and industrial standards. The results showed the r thermal conductivity values of XPS insulating board in the channel anti-frost-heavy practice range from 0.067 to 0.090 W/(m?k). According to the actual thickness of insulating board and the anti-frost-heavy practice, the suggested thermal conductivity values of XPS insulating board were 0.039 W/(m?k) when the mean temperature was below 25℃ and0.028 W/(m?k) when the mean temperature was below 10℃. The scientific assignment to thermal conductivity is the key to ensure the project quality.
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