Abstarct: Integrating the heat exchanging and load bearing functions of piles has been very useful in terms of energy saving in buildings, but it has simultaneously made it difficult to design and understand the behavior of these energy piles (EPs). Although many studies have dealt with the behavior of EPs in recent years, researchers still emphasize the need to perform further studies for a more accurate and complete understanding of EPs. One of the main goals of studying EPs is to investigate their thermal and thermomechanical behavior and the various parameters that affect them. This study presents the results of physical modeling of 1g scaled EP in dry sand with different relative densities, temperatures, and various loading states. The parameters measured during the tests include displacements of the pile head and baxse, axial strains generated in the pile, temperature changes along the pile and its surrounding soil, etc., which are used to calculate the stresses and forces generated in the pile so as to evaluate its behavior as well as changes in its ultimate bearing capacity. This study indicated an increase in the ultimate bearing capacity of the pile due to an increase in its temperature. The maximum rate of increase recorded for the ultimate bearing capacity (UBC) of the pile was calculated to be 8% and 20% at relative densities of 48% and 85%, respectively. The values of this increase were compared with the results of other studies. In addition, the type and magnitude of stresses generated in the pile under different loads were obtained and its graphs were plotted, and the effect of parameters such as the density of the surrounding soil, the thermal changes of the pile, and the type of loading on the pile was evaluated. Keywords: Energy pile, Physical modeling, Geothermal energy, Ultimate bearing capacity, Thermomechanical performance Integrating the heat exchanging and load bearing functions of piles has been very useful in terms of energy saving in buildings, but it has simultaneously made it difficult to design and understand the behavior of these energy piles (EPs). Although many studies have dealt with the behavior of EPs in recent years, researchers still emphasize the need to perform further studies for a more accurate and complete understanding of EPs. One of the main goals of studying EPs is to investigate their thermal and thermomechanical behavior and the various parameters that affect them. This study presents the results of physical modeling of 1g scaled EP in dry sand with different relative densities, temperatures, and various loading states. The parameters measured during the tests include displacements of the pile head and baxse, axial strains generated in the pile, temperature changes along the pile and its surrounding soil, etc., which are used to calculate the stresses and forces generated in the pile so as to evaluate its behavior as well as changes in its ultimate bearing capacity. This study indicated an increase in the ultimate bearing capacity of the pile due to an increase in its temperature. The maximum rate of increase recorded for the ultimate bearing capacity (UBC) of the pile was calculated to be 8% and 20% at relative densities of 48% and 85%, respectively. The values of this increase were compared with the results of other studies. In addition, the type and magnitude of stresses generated in the pile under different loads were obtained and its graphs were plotted, and the effect of parameters such as the density of the surrounding soil, the thermal changes of the pile, and the type of loading on the pile was evaluated. Keywords: Energy pile, Physical modeling, Geothermal energy, Ultimate bearing capacity, Thermomechanical performance