Abstract Solar radiation is a variable energy source and the mismatch between the availability of such source and the domestic energy demand is a paramount challenge to deal with. For this reason, in this work a 4.08 concentration ratio portable solar box cooker coupled with a thermal energy storage (TES) based on a phase change material (PCM) was characterized through outdoor experimental tests. The TES is a double-wall stainless steel vessel, with the annular volume filled with 2.5 kg of erythritol. The portable solar box cooker was tested under 4 different experimental conditions: without load, with water, with silicone oil, and with silicone oil inserted in the erythritol-based TES. The load tests were divided into a heating and a cooling phase, in order to evaluate the cooker performance in absence of solar radiation. Results showed that equipping the portable solar box cooker with the erythritol-based TES allowed to extend the average load cooling time, in the range 125–100 °C, of around 351.16%.

中文翻译：

---

与基于赤藓糖醇的 PCM 热能存储相结合的便携式太阳能箱式炊具的设计、实现和测试

摘要 太阳辐射是一种可变能源，这种能源的可用性与国内能源需求之间的不匹配是一个最重要的挑战。出于这个原因，在这项工作中，4.08 聚光比便携式太阳能箱式炊具与基于相变材料 (PCM) 的热能存储 (TES) 相结合，通过室外实验测试进行了表征。TES 是一个双壁不锈钢容器，环形容积内装有 2.5 kg 赤藓糖醇。便携式太阳能箱式炊具在4种不同的实验条件下进行了测试：无负载、有水、有硅油、硅油插入基于赤藓糖醇的TES。负载测试分为加热和冷却阶段，以评估没有太阳辐射的炊具性能。