Solar energy is considered alternative crucial to fulfilling the increasing of energy requirements. Passive cooling systems are considered alternatives to mechanical ventilation systems. In this work, a highlight for a solar chimney with water heater and Phase Change Material is applied as a passive solar technique for cooling building integrated with short wind tower for low energy building in the hot arid climate. This paper aims to investigate the performance of new passive air condition system with the solar chimney and solar water heater as a full system for cooling air and heating water to be applied during day and night time based on the improvement of the solar chimney in Assiut climate, Egypt. Measurements, for air temperatures and surface temperature of the aluminium and air velocity inside the chimney, water temperature and room temperature were conducted with different solar radiations to evaluate the panel performance and room thermal comfort. The findings show a minimum airflow rate in the chimney after sunset equal to 0.69 kg/s to provide fresh cold air during a hot day with a water temperature equal 58 °C and 40 °C during 2 pm and after sunset respectively. Also, integration of solar chimney and PCM with cooling wind tower achieves a significant reduction for room air temperature between 8 and 4 k during day and night time respectively and the condition within the comfort range of Predicted Mean Vote (PMV) especially night time. The results provided information to integrate this new low energy compact passive air cooling and water heating system for the housing projects of the upper floor in a hot arid climate in Egypt.

太阳能被认为对满足不断增长的能源需求至关重要。被动冷却系统被认为是机械通风系统的替代方案。在这项工作中，具有热水器和相变材料的太阳能烟囱的亮点被用作被动太阳能技术，用于冷却与短风塔集成在一起的建筑物，从而在炎热干旱的气候下实现低能耗建筑物。本文旨在研究新的被动式空调系统的性能，该系统将太阳能烟囱和太阳能热水器作为一种完整的冷却系统，用于在Assiut气候下改善太阳能烟囱在白天和晚上使用的冷空气和热水的性能。 ，埃及。测量铝的空气温度和表面温度以及烟囱内部的空气速度，在不同的太阳辐射下进行水温和室温测试，以评估面板性能和室内热舒适度。研究结果表明，日落后烟囱中的最小气流速率等于0.69 kg / s，以在炎热的天气中提供新鲜的冷空气，分别在下午2点和日落后的水温分别为58°C和40°C。此外，将太阳能烟囱和PCM与冷却风塔集成在一起，可在白天和晚上分别显着降低8至4 k之间的室内空气温度，并在预计平均投票（PMV）的舒适度范围内，尤其是在夜间，将温度降低。结果为在埃及炎热干旱的气候中将这种新的低能耗紧凑型被动式空气冷却和水加热系统集成到较高楼层的住房项目提供了信息。