Experiences From the First Short-Term Pit Thermal Energy Storage
Abstract
Pit thermal energy storage (PTES) is a promising low-cost storage technology used in connection with district heating. PTES systems have historically been coupled with solar district heating systems and used as seasonal heat storage. However, in January 2023, the first PTES operating as short-term heat storage started operating in Høje Taastrup, Denmark. Unlike existing PTES, this storage is not connected to a solar heating system but directly to the district heating grid and has a storage cycle of around two weeks. This paper presents lessons learned and the first results from the construction and operation of the Høje Taastrup PTES.
Keywords
Heat storage, Large-scale energy storage, District heating, Ptes