In this study, a thermoelectric energy harvesting system (TEHs) that utilized the heat from the surface of asphalt pavement is proposed with the aim to investigate the effects of the heat conduction using different shape structures in the subterranean level. The design model consisted of asphalt base holder to hold the asphalt, top plate for heating, and bottom plate for cooling. The top plate is exposed on the asphalt surface to harvest heat from sunlight, and the bottom plate is submerged into the pavement. The bottom plate is then connected to the cooling element, to take advantage of subterranean cooling to achieve a high-temperature difference between the top and bottom plate of the TEHs. In the past studies, subterranean cooling proved to maintain the underground temperature, but there is no assurance of high-temperature difference. Simulation and experimental investigation were conducted on how the shape structure affects the heat conduction in the subterranean level for two types of cooling elements, which is a cylindrical rod and flat bar. Both simulation and experimental results demonstrate that the cylindrical rod has yielded a higher temperature difference compared to the flat bar. Higher output voltage was generated for the case of the cylindrical rod due to more effective cooling, which resulted in larger temperature differences. Contradicted to previous studies, the field-testing has proved the system with asphalt has indeed influenced the temperature distribution into the system with a 24.39% increase of temperature difference in comparison to the system without the asphalt. Hence, the introduction of subterranean cooling and asphalt pavement heating has proved to improve the performance of TEHs, which makes it possible for utilization as an energy harvester.

在这项研究中，提出了一种利用沥青路面表面热量的热电能量收集系统（TEH），目的是研究地下不同形状结构的热传导的影响。设计模型由固定沥青的沥青基托，加热的顶板和冷却的底板组成。顶板暴露在沥青表面上，以从阳光中吸收热量，而底板则浸入人行道中。然后将底板连接到冷却元件，以利用地下冷却来实现TEH的顶板和底板之间的高温差。在过去的研究中，地下冷却被证明可以维持地下温度，但不能保证高温差。针对圆柱形冷却棒和扁棒两种冷却元件的形状结构如何影响地下水平的热传导进行了仿真和实验研究。仿真和实验结果均表明，与扁棒相比，圆柱棒产生了更高的温差。由于更有效的冷却，对于圆柱杆的情况产生了更高的输出电压，这导致了更大的温差。与先前的研究相反，现场测试已证明，与不含沥青的系统相比，含沥青的系统确实影响了系统中的温度分布，温差增加了24.39％。因此，