System and method for control of a transcritical refrigeration system
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United States of America Patent
Stats
-
Apr 18, 2017
Grant Date -
Jul 31, 2014
app pub date -
Jan 24, 2014
filing date -
Jan 25, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A system and method for a CO2 refrigeration system includes a compressor, a heat exchanger, a liquid receiver, a first valve, and a valve controller. The heat exchanger operates as a gas cooler when the CO2 refrigeration system is in a transcritical mode and as a condenser when the CO2 refrigeration system is in the subcritical mode. The first valve controls a flow of refrigerant from the heat exchanger to the liquid receiver. The valve controller monitors an outdoor ambient temperature and a pressure of refrigerant exiting the heat exchanger, determines whether the CO2 refrigeration system is in the subcritical mode or in the transcritical mode, determines a pressure setpoint based on the monitored outdoor ambient temperature, and controls the first valve based on a comparison of the determined pressure setpoint and the monitored pressure when the CO2 refrigeration system is in the transcritical mode.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2014 Application Filing Year
- F25B Class
- 1044 Applications Filed
- 850 Patents Issued To-Date
- 81.42 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 16 Citation Count
- F25B Class
- 91.41 % this patent is cited more than
- 8 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Oct 18, 2028 |
