Application of sandy bed solar collector system for water extraction from air

摘要

Extracting water from air by using sandy bed solar collector system is explored in the current paper. The system is studied theoretically and experimentally to evaluate the performance of the sandy bed impregnated with 30 percemt concentration CaCl_2 to produce water from moist air. In addition, the system was investigated at three different tilt angles: 15 deg, 20 deg and 25 deg. The theoretical model was constructed to study the effect of various parameters including solution concentration, and solar radiation intensity on the amount of collected water. Results show that sandy bed is effective for collecting water from moist air. The system can provide up to about 1.2-1 fresh water per square meter of glass cover per day. A reasonable agreement between theoretical results and experimental measurements is achieved. Results show also that a slight increase in the system productivity can be generated for 25 deg inclination angle.