Plateau energy storage system

The Qinghai-Tibet Plateau is rich in solar energy, with annual solar radiation amount of above 5400 MJ/m 2 . Owing to its effectiveness, renewability, safety and eco-friendliness, solar energy has been extensively utilized to generate electricity and provide heating for plateau buildings with abundant sunlight , .

Therefore, it can be concluded that, the system is also suitable for applications in most areas of the Tibetan Plateau with harsher climates, longer heating periods and richer solar energy resources in winter than Lhasa. Fig. 30. Epv of different cities. 5. Conclusions

Traditional solar thermal systems with water as the heat transfer medium generally encounter the freezing and overheating problems, which significantly increases the operational and management challenges of the energy systems, especially for remote rural households under extremely cold climates in Qinghai-Tibet Plateau.

The thermal storage layer plays a crucial role in storing and regulating thermal energy, making it a critical part of the proposed system.

The thermal storage layer can be further optimized to approximately 2 cm, thereby reducing the system's investment costs. Under the current control strategy, the average indoor temperature in the heating rooms is 18.3 °C and maintained above 16.3 °C during 75 % of the time.

This indicates that, the actual power generated by unit of PV array is determined by both the outdoor air temperature and the intensity of solar radiation. Under the current cost of about 765 Yuan/m 2 for per square meter of commercial PV array, the system can recover the array costs in 8.5 and 5.9 years in Lhasa and Nagqu, respectively.