The large variation in day and night temperature of Thar Desert area provides an opportunity to reduce temperature fluctuations and thermal discomfort inside temporary shelters and buildings using phase change materials. Melting and solidification temperature of lauric and palmitic acid based multitransformation phase change material (MTPCM) are tuned in such a way that it melts during day time and solidifies during night time passively throughout summer season of Desert area. However, the poor thermal conductivity of MTPCM (0.2 W m⁻¹K⁻¹) hampers its complete phase reversal from liquid to solid with natural convection during peak summer night time. Therefore, the natural graphite flakes are exfoliated with ~ 300 times volume expansion and micropores are generated to imbibe MTPCM. The exfoliated graphite – MTPCM composites are prepared using vacuum impregnation technique to enhance thermal conductivity of MTPCM. The effect of exfoliated graphite mass fraction and composite samples density on thermal conductivity, latent heat of fusion, melting temperature, and solidification temperature of MTPCM is investigated. Thermal conductivity of exfoliated graphite-MTPCM composite is increased up to 11.95 Wm⁻¹K⁻¹ at density 1170 kg m⁻³. The Morphology of composite samples is also investigated using scanning electron microscopic analysis. The MTPCM with significant latent heat of fusion, appropriate melting and solidification temperature, and high thermal conductivity make it suitable for passive building cooling applications in Desert area.

塔尔沙漠地区昼夜温度的巨大差异为使用相变材料减少临时避难所和建筑物内部的温度波动和热不适提供了机会。对月桂酸和棕榈酸基多相变材料（MTPCM）的熔化和固化温度进行调整，使其在沙漠地区的夏季白天白天熔化而在晚上被动熔化。但是，MTPCM的导热系数很差（0.2 W m ^-1 K ^-1）在夏季高峰期的夜间，自然对流会阻碍其从液相到固相的完全逆转。因此，天然石墨鳞片的体积膨胀约为300倍，并且会产生微孔以吸收MTPCM。剥落的石墨-MTPCM复合材料采用真空浸渍技术制备，以增强MTPCM的导热性。研究了片状石墨质量分数和复合材料样品密度对MTPCM的导热系数，熔融潜热，熔融温度和凝固温度的影响。片状石墨-MTPCM复合材料的热导率在密度为1170 kg m ^-3时增加到11.95 Wm ^-1 K ^-1。还使用扫描电子显微镜分析法研究了复合样品的形态。MTPCM具有显着的熔化潜热，合适的熔融和凝固温度以及高导热率，因此非常适合沙漠地区的被动建筑冷却应用。