Energy Utilisation and Ground Temperature Distribution of a Field Scale Energy Pile Under Monotonic and Cyclic Temperature Changes

The operating modes of energy piles depend on the thermal energy requirements of the built structures. The various operating modes of the energy piles lead to variations in the energy utilisation and ground temperature distribution. This paper presents the results obtained from a field-scale energy pile subjected to different modes of operations. In particular, it is found that cyclic temperatures provide better energy utilisation compared to monotonic temperatures. Also, the ground temperatures reduce with increasing radial distance from the pile for all operating modes.