HIPAS 系统中热湿传输的理论模型

A Theoretical Model for Heat and Moisture Transfer in HIPAS

从连续介质流体力学的观点，采用局部体积平均方法，建立了一个描述作物覆盖条件下土壤热湿迁移过程的二维数学模型．以能量平衡原理及土壤层水汽扩散理论为基础，建立了根系吸水吸热、作物蒸腾和土面蒸发模型．两者耦合适用于求解ＨＩＰＡＳ系统中热湿传输问题．

By employing the concept of continuum fluid mechanics and the local volume averaging method, the continnity equation and the momentum equation for water and moisture transfer in an HIPAS system with plant covering and under the action of the root system have been developed. The energy equations representing the energy state and the energy transfer are derived. Schemes for actually dealing with the water absorption and the heat absorption as well as the release of the root system and the evaporation on the soil top and leaf surface are given. The radiation from the soil and the leaves and the boundary conditions have been carefully handled.