提出一种用于直接为植物根系供水的聚光式太阳能蒸馏管设计思想,对装置结构和运行原理进行介绍,对用于该蒸馏管的聚光面进行聚光性能仿真,证明其具有宽广的聚光角,当光线入射角等于30°时接收率仍然达到近65%。并在实际天气条件下对蒸馏管的产水性能和运行温度进行了实验测试,给出了装置内部的工作温度和产水性能随时间的变化曲线。实验结果表明,在北京夏季晴朗天气条件下,该蒸馏管的太阳能产水效率约可达到35%,管内最高运行温度达到65℃,单位聚光面积每天的产水率达到3.6 kg/m2,可满足4.5 m2作物生长的需要。
Abstract
A half-buried tubular concentrating solar distiller, which is designed to supply freshwater to plant roots, is proposed in this paper. The design scheme and operating principle of the solar distiller are introduced. The optical performance of its solar concentrating unit is studied via optical simulations. The simulation results indicate that its solar concentrating unit has a broad light reception angle. The light receiving rate reaches nearly 65% when the light incident angle is about 30°. The solar distiller’s water production performance and operating temperature are tested under the actual weather conditions. The variation of operating temperature and water yield of the solar distiller with time is obtained. The experimental results show that the maximum operating temperature in the distiller reaches 65 ℃, and its water production efficiency reaches about 35%. The daily water productivity per unit concentrating area reaches 3.6 kg/m2, which can meet the requirement of 4.5 m2 crop growth under the condition of fine weather in summer in Beijing.
关键词
太阳能海水淡化 /
加湿除湿 /
灌溉 /
管式蒸馏器 /
半掩埋式
Key words
solar desalination /
humidification-dehumidification /
irrigation /
tubular type distiller /
half-buried
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基金
广西自然科学基金（2018GXNSFAA050139）
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