US6480803B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Load shedding thermostat
Assignee: Carrier Corp
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Filing: 2000-12-22
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Granted: 2002-11-12
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Expires: 2020-12-22
Abstract
Abstract A method of load shedding wherein a series of load shedding thermostats are mounted in building serviced by a utility. Each thermostat contains an addressable processor arranged to receive different code inputs form the utility. Heat loss and load characteristics for buildings are calculated from measured indoor and outdoor temperature movements along with the equipment's duty cycle for a given period of time and the required setback temperature for a given coded input is set into the thermostat based upon heat loss and load characteristics of the building.
Inventors
- 👤 Peter Gerard Pierret
- 👤 Kevin Farrell Dudley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:57
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/1902; G05D23/1904
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
168 words
A method of load shedding that includes the steps of mounting a load shedding thermostat within a building, said thermostat being arranged to control heating and cooling equipment within the building and having an addressable processor for communicating with a power provider; determining the normal operating load of the equipment prior to the initiation of a load shedding period by the relationship: Q L =m ( T o −T i )+ b where Q L is the normal operating load on the building, To is the measured outdoor temperature Ti is the measured indoor temperature m and b are parameters relating to the building heat loss and load characteristics; providing a code input signal to the processor to initiate a load shedding period during which the normal operating load is reduced by a given percentage; determining the thermostat load shedding temperature setting required during the load shedding period needed to reduce the normal operating load by said given percentage; and placing the load shedding temperature into the thermostat.
Claim 2
Independent Claim
168 words
A method of load shedding that includes the steps of mounting a load shedding thermostat within a building, said thermostat being arranged to control heating and cooling equipment within the building and having an addressable processor for communicating with a power provider; determining the normal operating load of the equipment prior to the initiation of a load shedding period by the relationship: Q L =m ( T o −T i )+ b where Q L is the normal operating load on the building, To is the measured outdoor temperature Ti is the measured indoor temperature m and b are parameters relating to the building heat loss and load characteristics; providing a code input signal to the processor to initiate a load shedding period during which the normal operating load is reduced by a given percentage; determining the thermostat load shedding temperature setting required during the load shedding period needed to reduce the normal operating load by said given percentage; and placing the load shedding temperature into the thermostat.
Claim 3
Dependent Claim
26 words
The method of claim 1 wherein the setback temperature is determined by the relationship: T i = T o - Q L - b m .
Claim 4
Dependent Claim
79 words
The method of claim 1 that includes the further steps of measuring the indoor and outdoor temperatures over a first given period and storing the temperature data for the first period in said processor; measuring the duty cycle for the equipment during the first given period and storing the duty cycle data in said processor; repeating the above noted measurement steps for a second period; and calculating the values of the m and b factors from the stored data.
Claim 5
Dependent Claim
129 words
The method of claim 3 wherein the m factor is determined by the relationship: m = DC 1 - DC 2 ( T 0 i - T i1 ) - ( T 02 - T i2 ) and the b factor is determined by the relationship: b=DC 1 −m ( T 01 −T i1 ) where: DC 1 is the measured duty cycle for the first given period DC 2 is the measured duty cycle for the second given period T 01 is the measured outdoor temperature for the first given period T 02 is the measured outdoor temperature for the second given period, T i1 is the measured indoor temperature for the first given period T i2 is the measured indoor temperature for the second given period.
Claim 6
Dependent Claim
32 words
The method of claim 1 that includes the further step of increasing the thermostat setting prior to a load shedding period to store additional energy within the building prior to load shedding.
Claim 7
Dependent Claim
48 words
The method of claim 1 that includes the further step of ramping the thermostat to an occupied setting in the event the thermostat is in an unoccupied setting at the initiation of a load shedding period, and automatically transitions to an occupied setting during a load shedding period.
Claim 8
Dependent Claim
42 words
The method of claim 1 that includes the further step of establishing a series of code input signals to the processor, each of which requires a different percentage reduction in the normal load condition at the time of a load shedding period.
Claim 9
Independent Claim
161 words
A method of load shedding that includes the steps of mounting a load shedding thermostat within a building, said thermostat being arranged to control heating and cooling equipment within the building and having an addressable processor for communicating with a power provider; determining the normal operating load of the equipment prior to the initiation of a load shedding period; providing a code input signal to the processor to initiate a load shedding period during which the normal operating load is reduced by a given percentage; determining the thermostat load shedding temperature setting required during the load shedding period needed to reduce the normal operating load by said given percentage; placing the load shedding temperature into the thermostat; returning the thermostat setting back to the normal temperature setting upon termination of the load shedding period; and providing load shedding thermostats to a number of buildings serviced by the power provider and randomly returning said thermostats to their normal setting at different times.
Claim 10
Independent Claim
161 words
A method of load shedding that includes the steps of mounting a load shedding thermostat within a building, said thermostat being arranged to control heating and cooling equipment within the building and having an addressable processor for communicating with a power provider; determining the normal operating load of the equipment prior to the initiation of a load shedding period; providing a code input signal to the processor to initiate a load shedding period during which the normal operating load is reduced by a given percentage; determining the thermostat load shedding temperature setting required during the load shedding period needed to reduce the normal operating load by said given percentage; placing the load shedding temperature into the thermostat; returning the thermostat setting back to the normal temperature setting upon termination of the load shedding period; and providing load shedding thermostats to a number of buildings serviced by the power provider and randomly returning said thermostats to their normal setting at different times.
Claim 11
Dependent Claim
22 words
The method of claim 8 that includes the further step of ramping the thermostat setting back to the normal setting in stages.
References Cited (Backward Citations)
US4228511A
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US4341345A
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US4345162A
Cited
US4655279A
Cited
US5644173A
Cited
US5717609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-11-11 | 2006-05-13 | 2006-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-11-11 | 2010-05-13 | 2010-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-11-11 | 2014-05-13 | 2014-11-12 | $7700.00 | Window Closed / Lapsed |