Condensing evapotranspiration for irrigation based on heat exchange and bionics for collecting liquid water

Based on the principles of crop evapotranspiration, heat exchange, vapor condensation, bionics for collecting liquid water, and water-saving irrigation, an innovative solution to improving crop water use efficiency: condensing evapotranspiration for irrigation (CEI) was summed up systematically. Low-temperature condition is created to aggregate, condense and harvest evapotranspiration vapor, and then irrigates the soil for root absorption, thus a totally closed water micro-circulation of soil-plant-atmosphere-continuum forms. Condensation and collection efficiency of evapotranspiration vapor, and energy use efficiency are key parameters of the technology. The technology is suitable for a serious water shortage, but energy-rich arid and semi-arid areas. The implementing patterns of this technology are divided into three types, such as condensing vapor by heat exchange between shallow soil and air, conditioner-based dehumidifier in greenhouses and collecting air water by bionics net in open-fields. The key points and directions to be solved in the future are breakthrough of bionics for collecting water, and optimization of system structure and operation process.