Smart Facade with Thermal Energy Storage

Winter:
Heat storage at a temperature of 30-40 C is sufficient for the winter. The working principle is as follows:
Electricity generation is provided by PVT panels. The primary source for thermal energy is PVT. The secondary source is the Smart Facade. The air circulating in the façade can reach a temperature of 40-50 C even on winter days, and excess thermal heat is stored with TES. TES collects about 3-5 days of energy on sunny days (Charge). In the absence of solar energy, this heat is discharged to the system from the storage. Thanks to the air circulating in the smart façade, the facades that are not exposed to the sun are easily heated.  When there's no sun and TES isn't enough, the heat pump (HP) runs.
Summer:
Heat storage at a temperature of 15-20 C is sufficient for the summer. The working principle is as follows:
Electricity generation is provided by PVT panels. Thermal energy is stored with TES. TES stores about 2-3 days of cooling energy with a cooling tower that operates at night. When the outside air temperature is appropriate (e.g. at night), it is supplied to the façade and the façade is prevented from overheating (free cooling). Cooling is provided by daytime TES discharge. When TES is not enough, the heat pump (HP) is activated. For warmer climates, the subsoil temperature (about 15-20 C) is used to cool the façade.   

Please note that, Renewable energy sources, which are difficult to utilize normally, are easily integrated into the TES system, thanks to low temperature regime.