Near isothermal machine
US10655618B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 23, 2016 |
| Grant date | May 19, 2020 |
| Priority date | — |
| Expiry date | Oct 19, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28F3/025
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A machine for compressing or expanding gas comprises a piston operating downwards in a compression stroke with respect to an inclined or vertical cylinder and upwards with respect to the cylinder in an expansion stroke. The piston has a heat absorbing and releasing structure attached to its bottom face. There is a gap between the piston and the base of the cylinder when the gas volume in the cylinder is at its minimum. The gap contains a hydraulic fluid which absorbs heat from the heat absorbing and releasing structure. A heat transfer surface containing fluid circulating to and from an external source maintains the hydraulic fluid at constant temperature. In one arrangement the heat absorbing and releasing structure comprises thin sheets of aluminium attached orthogonally to the bottom face of the piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.