Energy Transfer Effect of Dynamic Load on Underground Thermal Energy Storage

Effect of dynamic heat storage load mode on underground heat exchanger is studied based on large scale numerical model of multi-heat sources. Results show that dynamic temperature field provided by different load range, intermittent periods and cycle periods not only affect storage process of the heating period, but also affect energy diffusion in the energy protection period. Furthermore, results indicate that the semi-day intermittent mode is more effective than the full day intermittent mode, and the shorter intermittent period is a little more favorable. It will achieve more energy storage quantity, higher average temperature and maximum temperature. Intermittent period and reasonable heat source distribution avail heat diffusion and heat storage in underground heat exchanger.