Cross-season energy supply heat storage and cold storage system

How can cross-seasonal thermal storage improve solar energy utilization?

As heat storage volume increases, hot water preparation costs and heat loss per unit volume decrease. Thus, developing large-scale cross-seasonal thermal storage systems is an effective solution to improve the thermal efficiency and solar energy utilization of solar heating systems.

Why is cross-seasonal heat storage important?

The mismatch between solar radiation resources and building heating demand on a seasonal scale makes cross-seasonal heat storage a crucial technology, especially for plateau areas. Utilizing phase change materials with high energy density and stable heat output effectively improves energy storage efficiency.

Can solar thermal energy be used for cross-seasonal heating?

The increase in the tank temperature at the end of the heating period was beneficial for shortening the duration of the heat storage period for the following year. The feasibility of utilizing solar thermal energy and cascaded phase change heat storage for cross-seasonal heating has been demonstrated in this study.

Can a cross-seasonal heat storage system achieve low-carbon heating?

This study integrates cascaded phase change with a cross-seasonal heat storage system aimed at achieving low-carbon heating. The simulation analyzes heat distribution and temperature changes from the heat storage system to the heating terminal.

Are seasonal thermal energy storage systems practical?

These research findings suggest several practical applications for seasonal thermal energy storage systems. First, in remote areas with cold winters and hot summers, where the extension of the power grid and centralized heating networks is difficult, seasonal thermal energy storage can effectively integrate heating and cooling systems.

How do seasonal thermal storage systems improve intermittency of solar energy?

Seasonal thermal storage systems overcome the drawback on intermittency of solar. Heat pump and solar collectors with low-temperature storage improve the performance. Climate, storage temperature, energy efficiency, and life cycle cost are discussed. A decision support flow chart is presented for selection of system options.