An experimental study was performed to determine the effect of the number of evaporators on the water production and coefficient of performance of an air-water harvester. Water was obtained on the evaporator walls in free convection and condensation heat transfer modes. The evaporator dimension was 480 mm × 285 mm × 6.25 mm, and it was made of copper pipes. The evaporators were installed in a parallel arrangement in an open box (top and bottom open) with a size of 500 mm × 500 mm × 500 mm. The refrigerant R134a was used as the working fluid. The experiments were performed at a low pressure of 40 psi and a high pressure of 180 psi. In the outside evaporator walls, air flowed naturally and part of the water vapour in the air condensed. Three evaporator variations were tested: Case A (one evaporator), Case B (two evaporators), and Case C (three evaporators). Each evaporator contained 25 copper pipes and the length of each pipe was 285 mm. The maximum water production and the evaporator efficiency attained were 0.51 L a day and 13 % respectively. The COP of the machine was ranging from 5.2 to 13.3. Increasing the evaporator number elevated the water production.

进行了一项实验研究，以确定蒸发器的数量对空气-水收集器的产水量和性能系数的影响。在蒸发器壁上以自由对流和冷凝传热模式获得水。蒸发器尺寸为 480 mm × 285 mm × 6.25 mm，由铜管制成。蒸发器并列安装在尺寸为 500 mm × 500 mm × 500 mm 的敞开箱体（顶部和底部敞开）中。制冷剂R134a用作工作流体。实验在 40 psi 的低压和 180 psi 的高压下进行。在蒸发器外壁，空气自然流动，空气中的部分水蒸气凝结。测试了三种蒸发器变体：案例 A（一个蒸发器）、案例 B（两个蒸发器）、和案例 C（三个蒸发器）。每个蒸发器包含 25 根铜管，每根铜管的长度为 285 毫米。达到的最大产水量和蒸发器效率分别为每天 0.51 L 和 13%。该机器的 COP 范围从 5.2 到 13.3。增加蒸发器数量提高了产水量。