Despite of being solar assisted, evaporative cooling devices in hot arid regions consume a substantial amount of electricity to produce sufficient cooling effect. This paper presents the design and performance analysis of a novel hybrid evaporative solar cooling system, aided by underground heat exchanger. A fan-assisted chamber composed of two vertical plenum space is intended to be cooling façade; the first plenum space is made up of black aluminum transpired plate and the second plenum space is shaped from the sand tile wall. The sand tile wall is used as an evaporative pad and sand wall with a perforated aluminum plate as a solar collector to evaporate the sprayed water. Simulation model of this system is built in MATLAB and it has been validated through experimental investigation carried in the hot and dry regions of Tikrit, Iraq. Experimental outcomes agree reasonably well with simulation results with only 2.3% incongruity. When the cooling system is powered only with transpired solar collector (TSC), indoor air temperature reduces 5 °C less and relative humidity 15% higher than ambient. In contrast, when TSC is assisted by underground heat exchanger, indoor air temperature falls 12 °C below and relative humidity 26% higher than ambient. Hence, using underground heat exchanger reduces cooling load by 50%. This passive evaporative cooling system is found to maintain room temperature between 2° to 6 °C below the ambient. This hybrid evaporative cooling system ensures enhanced comfort at lesser energy consumption.

尽管有太阳能辅助，但在热干旱地区的蒸发冷却装置仍消耗大量电能，以产生足够的冷却效果。本文介绍了一种新型的地下热交换器辅助的混合式蒸发太阳能冷却系统的设计和性能分析。由两个垂直气室空间组成的风扇辅助腔室旨在进行冷却正面; 第一个气室空间由黑色铝透湿板组成，第二个气室空间由砂瓦壁形成。沙瓦壁用作蒸发垫，而沙孔与带孔的铝板用作太阳能集热器，以蒸发喷洒的水。该系统的仿真模型是在MATLAB中构建的，并且已经通过在伊拉克提克里特的炎热和干燥地区进行的实验研究得到了验证。实验结果与模拟结果相当吻合，只有2.3％的不一致。如果仅通过蒸发式太阳能集热器（TSC）为冷却系统供电，则室内空气温度降低5°C，相对湿度比环境温度高15％。相反，当TSC由地下换热器辅助，室内空气温度下降12°C，相对湿度比环境温度高26％。因此，使用地下热交换器可将冷却负荷降低50％。发现这种被动蒸发冷却系统可将室温保持在低于环境温度2°至6°C之间。这种混合式蒸发冷却系统以更少的能耗确保了更高的舒适度。