Engineering Research Equipment Grant: Experimental Equipmentto Measure Transient Heat and Moisture Transport through Fibrous Insulations

将装配一个设备包，用于通过家庭建筑中使用的各种保温层进行温度、湿度浓度和热流的现场测量。实验的主要目的是验证在实际现场条件下发生的辐射/扩散（质量和热量）传输过程的数值模型，包括昼/夜、冬/夏、高湿度和污染表面操作。大多数现有的数据都是在稳定状态下，有保护的热板条件下获得的，这使得模型外推到高湿度和时变环境是脆弱的。通过建筑墙体的能量损失的数值模型表明，通过适当选择复合保温材料的几何形状和性能，如发射率、密度和材料对水分的亲和力，可以节省大量的能量。通过这笔赠款购买的研究设备对于提供可靠的数据库至关重要，这些模型可以根据这些数据库在实际的实地条件下进行验证。

An equipment package will be assembled for field measurements of the temperatures, moisture concentration, and heat flux through various insulation layers used in home construction. The primary objective of the experiments will be to validate a numerical model of the radiation/diffusion (mass and heat) transport processes which occur under actual field conditions, including day/night, winter/summer, high humidity, and contaminated surface operation. Most existing data have been taken under steady-state, guarded hot plate conditions, making extrapolation of models to high humidity and time-varying environments tenuous. Numerical models of the energy lost through building walls indicate that substantial savings can be obtained by properly choosing the geometry and properties of the composite insulation materials, such as the emissivity, density, and affinity of the materials for moisture. Research equipment purchased through this grant is essential to provide a reliable data base against which such models can be validated under actual field conditions.