Boil-off gas reliquefaction system and method of discharging lubricant oil from boil-off gas reliquefaction system
US12117131B2 · kind B2 · utility
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7Claims
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Key dates
| Filing date | Sep 14, 2023 |
| Grant date | Oct 15, 2024 |
| Priority date | — |
| Expiry date | Sep 14, 2043 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2245/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed is a method of discharging lubricant oil from a BOG reliquefaction system configured to reliquefy BOG by compressing the BOG by a compressor, cooling the compressed BOG through heat exchange with non-compressed BOG by a heat exchanger, and reducing a pressure of fluid cooled through heat exchange by a pressure reducer. In the lubricant oil discharge method, the compressor comprises at least one oil-lubrication type cylinder and it is determined that it is time to discharge condensed or solidified lubricant oil, if at least one of preset conditions is satisfied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.