High efficiency air conditioning systems and methods
US10907862B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2019 |
| Grant date | Feb 2, 2021 |
| Priority date | — |
| Expiry date | May 13, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2400/23
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
Disclosed are refrigeration systems having a heat source to be cooled and a heat sink and a capacity of from about 2 to about 30 tons and comprising: (a) a heat transfer composition comprising a refrigerant comprising at least about 80% by weight of trans1-chloro-3,3,3-trifluoropropene (HCFO-1233zd(E)) or at least about 80% by weight of trans1,3,3,3-tetrafluoropropene (HFO-1234ze(E)); (b) a centrifugal compressor having a discharge:suction pressure ratio at least about 2:1; (c) a condenser operating at temperature in the range of from about 10° C. to about 60° C.; (d) and expander for producing relatively cold low pressure refrigerant liquid; (e) a high efficiency evaporator; and (f) at least one heat exchanger fluidly connected between said evaporator and said refrigerant suction of said compressor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.