Cascaded steam temperature control applied to a universal pressure boiler
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United States of America Patent
Stats
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Jan 18, 1994
Grant Date -
N/A
app pub date -
Feb 5, 1993
filing date -
Feb 5, 1993
priority date (Note) -
In Force
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Abstract
The firing rate and the feedwater flow rate of a universal pressure boiler are controlled using a cascaded steam temperature control system. The secondary superheater outlet temperature comprises an outer loop for the control system, while the convection pass outlet temperature comprises an inner loop for the control system. Control variables for the system include the secondary superheater outlet temperature, the convection pass outlet temperature and the difference between the primary superheater outlet temperature and the secondary superheater inlet temperature.
First Claim
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
| Patent Owner | Address | |
|---|---|---|
| ABB TECHNOLOGY LTD | 8050 ZÜRICH |
International Classification(s)
- 1993 Application Filing Year
- F22G Class
- 4 Applications Filed
- 3 Patents Issued To-Date
- 75 % Issued To-Date
Inventor(s)
| Inventor Name | Address | # of filed Patents | Total Citations |
|---|---|---|---|
| Cameau, Max-Alix | Cleveland Heights, OH | 1 | 5 |
# of filed Patents : 1 Total Citations : 5 | |||
| Dolan, Lemuel E | Lawrenceville, GA | 1 | 5 |
# of filed Patents : 1 Total Citations : 5 | |||
| Schultz, Alfred | Mentor, OH | 3 | 31 |
# of filed Patents : 3 Total Citations : 31 | |||
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Patent Citation Ranking
- 5 Citation Count
- F22G Class
- 0 % this patent is cited more than
- 31 Age
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Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text
US Patent No: 9813021
System and method for enhanced watch dog in solar panel installations
Abstract
A system and method for automated shutdown, disconnect, or power reduction of solar panels. A system of solar panels includes one or more master management units (MMUs) and one or more local management units (LMUs). The MMUs are in communication with the LMUs with the MMUs and LMUs 'handshaking' when the system is in operation. The MMUs are connected to one or more controllers which in turn are connected to emergency detection sensors. Upon a sensor detection of an emergency, the associated MMU is notified which in turn instructs associated LMUs to take appropriate action. In the event that communication with the MMUs has been cut off, the LMUs take the initiative to shut down, disconnect, or reduce the output of associated string(s) of solar panels.
Description
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