Abstract Solar thermoelectric power generation during the day and night-time are achieved using Alumina Nano-Enhanced Phase Change Material on the Thermoelectric Generator (TEG) cold side. The portion of the thermal energy is used to produce electricity using TEG while the rejected heat is stored in a D-Mannitol as Phase Change Material (PCM) during active hours as thermal energy. Thus, continuous power generation is achieved using Nano-Enhanced D-Mannitol (NEDM) as the PCM. The performance parameters of TEG including voltage, current and power profile of the NEDM were recorded. The experimental setup was established for thermosyphon passive and natural convection cooling. For different mixtures, heat inputs and for both types of cooling the electrical parameters were analysed for open power output and circuit voltage. A 99% D-Mannitol + 1% Alumina nanoparticle composition was observed as the optimal composition for all heat inputs and cooling. Subjecting the optimised composition to heat inputs of 10 W, 30 W, 60 W and 90 W along with thermosyphon cooling led to increased maximum average TEG electrical power outputs of 0.23 W, 1.09 W, 1.27 W and 1.33 W respectively, each being 4.04, 4.99, 3.05 and 3.24 times higher than the corresponding values of the natural cooling phase.

中文翻译：

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D-甘露醇中添加氧化铝纳米颗粒对可逆太阳能热发电的影响：实验研究

摘要 在热电发电机 (TEG) 冷侧使用氧化铝纳米增强相变材料实现了白天和夜间的太阳能热电发电。热能的一部分用于使用 TEG 发电，而排出的热量在活动时间作为热能存储在 D-甘露醇中作为相变材料 (PCM)。因此，使用纳米增强型 D-甘露醇 (NEDM) 作为 PCM 实现了连续发电。记录了 TEG 的性能参数，包括 NEDM 的电压、电流和功率分布。为热虹吸被动和自然对流冷却建立了实验装置。对于不同的混合物、热输入和两种类型的冷却，分析了开路功率输出和电路电压的电气参数。观察到 99% D-甘露醇 + 1% 氧化铝纳米颗粒组合物是所有热输入和冷却的最佳组合物。使优化的组合物经受 10 W、30 W、60 W 和 90 W 的热输入以及热虹吸冷却导致最大平均 TEG 电功率输出分别增加 0.23 W、1.09 W、1.27 W 和 1.33 W，分别为 4.04，比自然冷却阶段的相应值高 4.99、3.05 和 3.24 倍。