Principle of Energy Storage Charging Pile Heater

The heat exchange capacity of the energy pile depends on the thermal resistivity of the pile and the surrounding soils. The consequently, their thermal behaviour could be different. The pile Lennon et al., 2009; Wood et al., 2010) is not in good agreement with the theoretically calculated value.

The energy pile concept can be considered as a to cool/heat buildings is the heat pump (HP) system. Unlike the vast cost of drilling boreholes and the land area required for borehole could be readily employed almost anywhere. Although HPs are installation.

For IA-CAES, the constant pressure in the air storage device is maintained during the charging and discharging process, as shown in Fig. 7 (c). A constant storage pressure is often achieved by applying a certain depth of water pressure and the air storage device is often constructed underwater.

Energy piles offer a promising and eco-friendly technique to heat or cool buildings. Energy piles can be exploited as ground heat exchangers of a ground source heat pump system. In such application, the energy pile and its surrounding soil are subjected to temperature changes that could significantly affect the pile–soil interaction behaviour.

To store the energy, the system uses an injection/production well that extended from the ground surface to a deep aquifer. During the charging process, CO 2 is injected into the target deep aquifer through wellbore. During the discharging process, CO 2 is produced to the ground surface to complete the power generation process.

In the discharging process, before each stage of expansion, the high-pressure air firstly absorbs heat to become high-temperature air. The heat origins from the compressed heat stored during the charging process. Furthermore, the fluid for heat storage is closely related to the heat storage temperature.