| 摘要 |
The present invention relates to an arrangement for storing thermal energy, comprising a shaft (1) and at least one tunnel (2), the shaft (1) and the at least one tunnel (2) being in fluid communication with each other. The tunnel (2) comprises at least a first (2a), a second (2b), and a third (2c) tunnel section. The second tunnel section (2b) is arranged between and connected to the first (2a) and third (2c) tunnel sections. The second tunnel section (2b) is sealed off at an end (4) connected to the third tunnel section (2c), and the third tunnel section is further connected the shaft (1). The shaft (1) and first (2a) and third (2c) tunnel sections are adapted for holding fluid for thermal storage. The second tunnel section (2b) is adapted for use as an expansion space should a volume of the fluid expand beyond a volume of the shaft (1) and the first (2a) and third (2c) tunnel sections. The arrangement further comprises a first transfer means (5) for passing the expanded fluid volume from the shaft (1) and/or the third tunnel section (2c) temporarily into the first tunnel section (2a), and a second transfer means (6) for passing the expanded fluid volume from the first tunnel section (2a) to the second tunnel section (2b). |
