Comparing with traditional construction materials, the ceramic grain concrete possesses the advantages of smaller thermal conductivity coefficient, less weighty and better structural performance.
与传统的建筑材料相比，陶粒混凝土具有导热系数小、重量轻、结构性能好等优点。
Through experiment, the relation figures of engine rotation speed, coefficient of performance of heat pump and engine thermal efficiency are presented and analyzed.
通过实验，得出了发动机转速与热泵性能系数、发动机热效率的关系曲线，并进行了分析。
This paper briefly introduces the performance requirements of the insulating materials such as the thermal conductivity, heat expansion coefficient, and density, etc.
简要介绍了保温隔热材料的性能要求（如导热系数、密度、膨胀系数等）、作用原理以及影响材料导热系数的主要因素。
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