Category: Transient Plane Source
Abstract: An equation for determining the effective thermal conductivity of fire resistive materials using a slug calorimeter was developed, and effective thermal conductivities were measured during heating and cooling cycles of these materials. The obtained values were compared to those obtained through measurements using the hot wire, and transient plane source methods. It was determined that the obtained values were in good agreement with those measured using these two methods. The obtained values were within 15% of those obtained previously up to 873 K. Above this temperature, the computed values are significantly higher than those obtained using the other methods; however, it was determined that by combining the results produced during a complete heating/cooling cycle, a larger temperature range can be covered. It was concluded that a slug calorimeter is useful for evaluating the thermal performance of fire resistive materials if multiple heating/cooling cycles are used to provide information on the influence of reactions and convective transport that occur during heating.
Reference: Fire and Materials, 30 (2006) 257-270