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Performance Study of Water Harvesting Unit Working Under Iraqi Conditions

机译：伊拉克条件下集水机组性能研究

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摘要

The scarcity of water facing the world is one of the biggest challenges of this century. This challenge requires research plans in the field of water desalination that is not suitable for human use or the harvesting of water from the air. In this work, the performance of the water harvesting unit from the ambient air is studied. For this purpose, a vapor compression system is designed and built, a 372 W reciprocating compressor is selected depending on the use of a small family consisting of four persons. The components of the vapor compression system are designed depending on the compressor power. The unit evaporator is modified to condensate the water vapor associated with the air instead of cooling the air. The effect of volume flow rate of air across the evaporator is studied. The range of air volume flow rate is from 224 to 244 m~3/h, as well as the operation mode of the unit which either continues to condensate or freeze the water vapor on the evaporator is also studied. The result showed that the water harvesting unit can work at a relative humidity as low as about 20%. The maximum water production for the unit is 7.91/day with a power consumption of 1.76kW-h/l at the volume flow rate of air is 230 m~3/h. When an evaporative cooler is turned on in the test chamber, the amount of water production increases to about 13.111/day with a power consumption of 1.068 kW-h/1, for the same volume flow rate of air mentioned above.
机译：世界面临的水短缺是本世纪最大的挑战之一。这一挑战要求在海水淡化领域的研究计划不适合人类使用或从空中收集水。在这项工作中，研究了来自周围空气的集水单元的性能。为此，设计并制造了一个蒸汽压缩系统，根据一个由四个人组成的小型家庭的使用情况，选择了372 W往复式压缩机。蒸气压缩系统的组件根据压缩机功率进行设计。单元蒸发器经修改以冷凝与空气相关的水蒸气，而不是冷却空气。研究了空气流过蒸发器的体积流量的影响。空气体积流量范围为224至244 m〜3 / h，并且还研究了该单元在蒸发器上继续冷凝或冻结水蒸气的运行模式。结果表明，集水单元可以在相对湿度低至约20％的条件下工作。在空气的体积流量为230 m〜3 / h时，该装置的最大出水量为7.91 /天，耗电量为1.76kW-h / l。对于上述相同体积的空气流量，当在测试室中打开蒸发冷却器时，产水量增加到约13.111 /天，耗电量为1.068 kW-h / 1。

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