In this master’s degree thesis potential utilization of excess heat on Gotland is investigated. The report first identifies potential sources and users of excess heat and creates seasonal heat profiles for a few of them. The heat profiles are then matched and studied from technical, economic, and environmental perspectives to provide a comprehensive understanding of the investigated cases. The study reveals that large scale refrigeration systems and greenhouses, data centers and greenhouses, and electrolysers and ultra-pure water purification processes could potentially benefit from synergies created by excess heat utilization. However, challenges such as mismatched heat profiles and the risk of investments in excess heat capture technology may hinder such collaborations.