Improving the thermal performance of windows is important for building energy efficiency. Filling windows with variable transparency shape-stabilized phase change materials (VTSS-PCM) improves the thermal inertia of windows while avoiding the leakage of PCM. In this paper, a new type of VTSS-PCM window was proposed, tested, simulated and optimized in hot summer and cold winter climate zone. A numerical model of the VTSS-PCM window was built, and the model was validated using experimental tests. On this basis, three key parameters of VTSS-PCM were investigated and optimized. Finally, the energy and economic performance of the optimized VTSS-PCM window were compared with a typical hollow glass window. The results showed that the total annual unfavourable heat transfer (TAHT) and the annual investment cost (AIC) of the VTSS-PCM window obtained from the optimization were 118.16 kWh/m2 and 8.53 CNY/m2, respectively. Compared with the hollow glass window, the VTSS-PCM window reduced the TAHT by 30.14% and the total annual cost by 28.39%. The VTSS-PCM window produced a better development potential in terms of energy performance and economic performance. This study provided a reference for the application of the VTSS-PCM window in hot summer and cold winter regions of China.

中文翻译：

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夏热冬冷气候区可变透明度形状稳定PCM窗户的能源和经济性能优化

提高窗户的热性能对于建筑能源效率非常重要。用可变透明度形状稳定相变材料（VTSS-PCM）填充窗口可改善窗口的热惯性，同时避免PCM泄漏。本文提出了一种新型的VTSS-PCM窗口，并在夏热冬冷气候区进行了测试、模拟和优化。建立了VTSS-PCM窗口的数值模型，并通过实验测试验证了该模型。在此基础上，对VTSS-PCM的三个关键参数进行了研究和优化。最后，将优化后的VTSS-PCM窗的能源和经济性能与典型的中空玻璃窗进行了比较。结果表明，优化得到的VTSS-PCM窗口年不利传热总量（TAHT）和年投资成本（AIC）为118.16 kWh/m28.53元/平方米2， 分别。与中空玻璃窗相比，VTSS-PCM窗降低了TAHT 30.14%，年总成本降低了28.39%。 VTSS-PCM窗在能源性能和经济性能方面产生了更好的发展潜力。本研究为VTSS-PCM窗口在我国夏热冬冷地区的应用提供参考。