Cross-season underground energy storage

What is seasonal thermal energy storage (STES)?

Therefore, when the "source" side (solar heat source side) and the "load" side (energy using side) have significant seasonal characteristic, the seasonal thermal energy storage (STES) can effectively solve the mismatching characteristic of the solar energy heating system in time, space and strength.

Are solar energy storage systems underground?

The experience of USTES applications worldwide in recent years shows that most of the solar energy seasonal storage projects have significant economic, social and environmental benefits. However, the key part of solar energy storage system is underground.

How to promote solar energy with seasonal storage?

Therefore, the policy system should be improved in planning formulation, legislative support, operation supervision, engineering monitoring, standard formulation and incentive measures to promote the steady development of solar energy with seasonal storage.

What is the thermal storage capacity of solar and copper plant waste heating?

The total heating building area is 10000m 2, and the collecting area of 1000m 2. The pipes were buried in the storage volume in a hexagon shape with a volume of 500000m³, and the annual thermal storage capacity is 15000 GJ . Fig. 12. Solar and copper plant waste heat heating system with STES in Chifeng .

What are seasonal storage cycles?

At intermediate values of the ratio s / r, e.g. r = 3 and s = 1 (C) or r = 1.4 and s = 0.1 (E), seasonal storage cycles occur as the large storage capacity and RES generation result in smooth charging and discharging phases.

Can salt caverns be used as seasonal energy storage?

Today, among the large-scale installations that can be used as seasonal energy storage, in salt caverns is regarded as one of the most realistic and promising solutions, as salt caverns provide the required capacity and conditions to store hydrogen on a seasonal scale.