In regions with significant heating requirements, the effective utilization of waste heat from industrial processes becomes crucial for sustainable energy practices in buildings. Norway, possessing an extensive district heating infrastructure and substantial combined heat and power generation, encounters challenges in maximizing the use of excess heat during the summer months despite its temperate climate. The constant operation of waste incineration plants, irrespective of weather conditions, necessitates thoughtful considera- tion for long-term heat storage solutions. Presently, a large variety of seasonal thermal energy storage technologies exist but the most convenient are the ones based on the ex- ploitation of geothermal energy resources.