Structural characteristics and thermal performances of paraffin-based phase change materials for phase change sunshade

As an inexpensive and easily available organic phase change material (PCM), paraffin has good energy storage effect and can realize efficient energy storage and utilization. In this work, paraffin section–lauric acid (PS–LA) and paraffin section–myristic acid (PS–MA) were prepared by melting blending paraffin section (48–50 °C) with fatty acids to overcome the limitation of phase change temperature of paraffin section (PS). The phase change temperatures of PS–LA and PS–MA were 36.88 and 42.17 °C, and the phase change latent heats were 174.55 and 184.53 J/g, respectively. Thermal cycle treatment and performance analysis shown PS–LA has better thermal reliability, and the mixing process of PS and LA has no chemical reaction. The phase change sunshade made of PS–LA was placed on the outer side of the glass window, which could reduce the central peak temperature of the model by 4.893 °C, playing an excellent role in delaying and reducing the peak temperature.