| 摘要 |
<p>The invention relates to a system, comprising a plurality of weights (12); a first lifting unit (10) configured to lower a weight of the plurality of weights (12) from a first height (50) down to a second height (60) at a first rate; a plurality of second lifting units (16), wherein each second lifting unit (16) is configured to lift a weight of the plurality of weights (12) from the second height (60) up to the first height (50) at a second rate; and an energy storage device (20), wherein the plurality of second lifting units comprises N lifting units, wherein the system is configured to operate in a closed cycle having N steps, wherein N is an integer being equal to the ratio of the first rate to the second rate and wherein the lifting units (10, 16) are coupled to the energy storage device (20) and configured to exchange energy therewith. The invention further relates to a process, comprising N steps, each step comprising lowering a weight of a plurality of weights from a first height down to a second height at a first rate and lifting N weights of the plurality of weights up towards the first height at a second rate; wherein N is an integer larger than 1 and equal to the ratio of the first rate to the second rate.</p> |
