Lateral Heat Transfer in Cryogenic Multilayer Insulation
In recent years, the increasing demand in the application of cryogenic multilayer insulation has stimulated considerable interest in the study of its heat transfer characteristics. While the mechanisms and analysis for the heat transfer normal to the layers are well developed and understood [1–3], there still exists some uncertainty in the basic understanding of lateral heat transfer characteristics, despite many recent investigations [4–10]. This uncertainty is due largely to the analytical complexity of lateral conduction-radiation interaction and the experimental difficulty in obtaining definitive measurements. The present paper examines existing theories and measurements in an attempt to clarify and improve the current understanding. New analytical interpretations and experimental data are also presented, and earlier measurements by other investigators are analyzed.
KeywordsHeat Transfer Effective Thermal Conductivity Lateral Thermal Conductivity Insulation System Definitive Measurement
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