某电厂发电机定子过负荷保护热容量常数定值的论证

结合国家和电力相关部门的有关规程和规定,针对某电厂发电机定子绕组过负荷保护反时限部分的热容量常数的定值开展了计算论证,确认如何整定能够更好地满足该厂实际运行需要。此论证对国内其他电厂该保护的定值整定有参考意义。

钢纤维混凝土路面板结构温度应力的有限元分析

在复合材料混合物法则基础上考虑了钢纤维的分布与取向 ,给出了钢纤维混凝土的热传导系数、热容量系数及热变形系数的计算公式 ,并采用有限单元法建立了钢纤维混凝土路面板结构的有限单元方程 ,求解了钢纤维混凝土路面板结构的温度应力。结果表明 。

耙散内加热高效节能流化床

简介了耙散内加热流化床的结构特征,并从补充加热、物料与内加热管直接接触和内加热管表面温度较高三个方面,分析了该机的高效节能原理。

Heat Capacity and Thermal Expansion of Water and Helium

Original expressions for heat capacity CV and its components, vibrational and configurational components of thermal expansion coefficient were established. The values of CV, Cvib, Cconf, Cvib and Cconf for water and helium 4He were calculated.

Conductivity properties of β-SiAlON ceramics

The thermal diffusivity and heat capacity of β-SiAION ceramics with different Z values （0.6, 1.5, 3.0） were measured by laser flash technique and differential scanning calorimetry （DSC）, respectively. The thermal conductivity of β-SiAION was calculated from thermal diffusivity, heat capacity and density and it decreased and then kept almost constant with increasing of temperature. Two different models representing effective thermal conductivity were established and the various parameters of these models were simulated based on the results from the present work. The fitted regression lines were in good agreement with the experimental values.

Thermodynamics properties and thermal conductivity of Mg_2Pb at high pressure

The thermodynamics properties and thermal conductivity of Mg2Pb at high pressures have been calculated by first-principles.The enthalpy of formation and heat capacity obtained at 0 GPa are in good agreement with the experiments and other theoretical results.The thermal conductivity and coefficient of thermal expansion of Mg2 Pb at high pressure were evaluated.The thermal conductivity presents a second-order polynomial with pressure.The calculated thermal conductivity of Mg2Pb indicates that it is suitable to be used as thermal conductor at 0 K.