| 摘要 |
A thermal energy accumulator comprising a container (4) defines a space (14) adapted to contain a heat accumulating substance (20) being solid at room temperature at ambient atmospheric pressure. In accordance with the invention, said expansion/contraction device (33) comprises a force actuating means (50) associated with said container (4) for taking up thermal expansion and contraction of the heat accumulating substance (20) at melting and solidification, respectively. |
