Concept of cross-seasonal energy storage water

What is seasonal thermal energy storage (STES)?

Using excess heat collected in the summer to compensate for the heat supply insufficiency during the wintertime is the concept of seasonal thermal energy storage (STES), also called long-term heat storage.

Does seasonal thermal energy storage provide economic competitiveness against existing heating options?

Revelation of economic competitiveness of STES against existing heating options. Seasonal thermal energy storage (STES) holds great promise for storing summer heat for winter use. It allows renewable resources to meet the seasonal heat demand without resorting to fossil-based back up. This paper presents a techno-economic literature review of STES.

What is the history of closed seasonal thermal energy storage (TES)?

The recent history of closed seasonal TES (Fig. 3) can be traced back to 1959, when Ref. presented a first technically sophisticated attempt for seasonal storage of thermal energy in subsurface rock chambers. A few years later, Ref. published ideas for storing solar energy in the subsurface.

What are water-based closed seasonal TES?

On a technical level, the three most attractive concepts in the field of water-based closed seasonal TES are Pit Thermal Energy Storages (PTES), Tank Thermal Energy Storages (TTES) and Water-Gravel Thermal Energy Storages (WGTES). PTES are water-filled sealed pits while TTES are enclosed basin structures.

Which countries offer water-based closed seasonal thermal energy storage (TES)?

Germany, Denmark, and Sweden clearly dominate both in terms of installed volume and the number of TES built. On a technical level, the three most attractive concepts in the field of water-based closed seasonal TES are Pit Thermal Energy Storages (PTES), Tank Thermal Energy Storages (TTES) and Water-Gravel Thermal Energy Storages (WGTES).

What is seasonal/long-term heat storage?

The concept of seasonal/long-term heat storage presents great opportunities for making the utmost use of solar energy. Stored “excess” heat can compensate for the heat shortage when necessary. Seasonal storage offers the possibility that solar energy can cover all the heating loads without an extra heating system.