Today’s world is facing two issues regarding its energy demand. First, it needs secure and accessible energy sources for supporting humans lives to allow their progress. Second, fossil fuels as the main sources of energy are threatening the future of life on earth due to their emissions. Shallow geothermal energy as a renewable energy source is a promising subject of study whose real-world implementations can contribute to overcome these issues. This research focuses on energy tunnels as a main energy geostructure that allow shallow geothermal energy exploitation from the ground. The geothermal performance of energy tunnels is dependent on geometrical and thermophysical parameters of the tunnel and its surroundings, i.e.