太阳辐照对静止水面稳态蒸发的影响

针对低风速下静止水面的蒸发过程,考虑水面与气流的对流传热传质、水体对太阳能辐射的容积内光谱吸收及内部传热,建立分析太阳辐照作用的水面稳态蒸发模型.采用控制容积法结合蒙特卡洛法和谱带模型数值求解水体内部、表面、气流之间的能量传递与质交换.分析空气湿度、温度、流速及正逆温差下,太阳辐照强度对于水面蒸发的影响.结果表明,太阳辐照强度对低风速下静止水面蒸发的影响很大.

Effect of Solar Radiation on Evaporation of Still Water Surface

An evaporation model at steady state was bulit to analyse effect of solar radiation on evaporation of still water surface at low airflow velocity. It considers convective heat and mass transfer from water surface to airflow,interior heat transfer and solar radiation absorbing spectrum of water. Finite volume method combined with Monte Carlo method and spectral band model are used to simulate energy and mass transfer among water interior,surface and airflow. Effect of solar irradiance on evaporation rate of water surface was analysed at different airflow velocity,humidity,temperature,forward and inverse temperature difference. It shows that solar irradiance effect on evaporation of still water surface is great at low airflow velocity.