Active stress control during rapid shut down
US9574808B2 · kind B2 · utility
0Cited by
9References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 2008 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | Aug 29, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2500/27
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A closed loop refrigerant expansion system with a tube and shell condenser is provided with a control which, upon shutdown, causes the flow of refrigerant to reverse from the evaporator to the condenser to thereby both reduce the amount of refrigerant vapor passing to the condenser and increase the amount of liquid refrigerant in the condenser to thereby reduce the maximum temperature load in the condenser. Reverse flow can be made to occur either by reversing the direction of the refrigerant pump or opening a bypass valve around the pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.