| 摘要 |
A machine 1 for compressing or expanding gas comprising controlling temperature by moving a heat absorbing and releasing structure 18 into and out of a fluid and the gas such that the temperature of the fluid is maintained at a substantially constant temperature. Preferably a piston 10 operates downwards in a compression stroke with respect to an inclined or vertical cylinder and upwards with respect to the cylinder in an expansion stroke, where the piston may have a heat absorbing and releasing structure attached to its bottom face. There may be a gap between the piston and the base of the cylinder when the gas volume in the cylinder is at its minimum, such that the gap contains a hydraulic fluid which absorbs heat from the heat absorbing and releasing structure. In one arrangement the heat absorbing and releasing structure comprises thin sheets of aluminium attached orthogonally to the bottom face of the piston. |
