1 Department of Buildings and Energy, Technical University of Denmark2 Department of Civil Engineering, Technical University of Denmark
Seasonal storage is necessary if renewable heat sources are to be applied on a large scale. Pit water storage seems to be a cheaper alternative to steel tank storage. The lid price is the largest component of a pit water store with a cost share of about 60% of the total storage cost. Due to the large share in price the development of lid constructions is crucial for the development of pit water storage and seasonal storage.The current report gives a survey of the most important established and planned designs from Denmark, Sweden and Germany.