| 摘要 |
<p>Method and device for storing thermal energy in, and recapturing thermal energy from, respectively, an underground energy storage, comprising at least four holes, through which a heat carrier is transported and therewith heating or cooling the ground, respectively. The holes are arranged essentially along at least two concentric circles, and a control gear is arranged to control a valve system, which is arranged to direct the heat carrier to holes that are arranged along one circle and thereby heating or cooling, respectively, the ground along said circle. When the temperature of the heat carrier is higher than that of the surrounding ground, inner circles are heated before outer circles. When the temperature of the heat carrier is lower than that of the surrounding ground, outer circles are cooled before inner circles.</p> |
