Adaptive microprocessor control system and method for providing multiple heating modes in twinned furnaces
First Claim
1. In a heating system containing twinned furnaces capable of independently operating at multiple levels, a method for providing multiple heating modes to satisfy a required heating load during a given cycle, there being some total number of heating modes, wherein each heating mode may be activated for a time interval whose length is a function of furnace activity during a most recent previous cycle, comprising the steps of:
- determining an existence of a heating load to be satisfied;
operating both furnaces independently at levels appropriate to a first heating mode for a first time interval that does not exceed a first predetermined limit;
for each subsequent heating mode up to a number of one less than the total number of heating modes, operating both furnaces independently at levels appropriate to said subsequent heating mode for a subsequent time interval that does not exceed a subsequent predetermined limit; and
operating both furnaces independently at levels appropriate to a final heating mode for a final time interval until the heating load is satisfied;
calculating a thermal load requirement as a function of all of said time intervals; and
predetermining all of said predetermined time intervals for a next cycle from the calculated thermal load requirement.
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Abstract
In a heating system containing twinned furnaces capable of independently operating at multiple levels, a method for providing multiple heating modes to satisfy a required heating load during a given cycle, there being some total number of heating modes, wherein each heating mode may be activated for a time interval whose length is a function of furnace activity during the most recent previous cycle. The method comprises the steps of: determining the existence of a heating load to be satisfied; operating both furnaces independently at levels appropriate to a first heating mode for a first time interval that does not exceed a first predetermined limit; for each subsequent heating mode up to a number of one less than the total number of heating modes, operating both furnaces independently at levels appropriate to each subsequent heating mode for a subsequent time interval that does not exceed a subsequent predetermined limit; and operating both furnaces independently at levels appropriate to a final heating mode for a final time interval until the heating load is satisfied; calculating a thermal load requirement, as a function of all of the time intervals; and predetermining all of the predetermined time intervals for a next cycle, from the calculated thermal load requirement.
72 Citations
7 Claims
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1. In a heating system containing twinned furnaces capable of independently operating at multiple levels, a method for providing multiple heating modes to satisfy a required heating load during a given cycle, there being some total number of heating modes, wherein each heating mode may be activated for a time interval whose length is a function of furnace activity during a most recent previous cycle, comprising the steps of:
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determining an existence of a heating load to be satisfied; operating both furnaces independently at levels appropriate to a first heating mode for a first time interval that does not exceed a first predetermined limit; for each subsequent heating mode up to a number of one less than the total number of heating modes, operating both furnaces independently at levels appropriate to said subsequent heating mode for a subsequent time interval that does not exceed a subsequent predetermined limit; and operating both furnaces independently at levels appropriate to a final heating mode for a final time interval until the heating load is satisfied; calculating a thermal load requirement as a function of all of said time intervals; and predetermining all of said predetermined time intervals for a next cycle from the calculated thermal load requirement. - View Dependent Claims (2, 3)
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4. A method for providing a two stage heating cycle using twinned single stage furnaces, comprising a first and a second furnace, as a function of a most recent previous heating cycle comprising the steps of:
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determining the existence of a heating load to be satisfied; running blowers in both said furnaces and burners in said first furnace only, for a first time interval that does not exceed a predetermined limit, said running of said blowers in both said furnaces and burners in said first furnace only comprising a first heating mode; running the blowers and burners in both said furnaces for a second time interval until the heating load is satisfied, said running of said blowers and burners in both said furnaces comprising a second heating mode; calculating a thermal load requirement, as a function of said first time interval and said second time interval; and predetermining the first time interval limit, for a next cycle from the calculated thermal load requirement. - View Dependent Claims (5)
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6. A method for providing three heating modes using twinned multi-stage furnaces, comprising a first and a second furnace, as a function of a most recent previous heating cycle comprising the steps of:
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determining an existence of a heating load to be satisfied; running blowers in both said furnaces and burners in said first furnace only at low fire for a first time interval that does not exceed a first predetermined limit, said running of said blowers in both said furnaces and burners in said first furnace only at low fire comprising a first heating mode; running the blowers and burners in both said furnaces at low fire for a second time interval that does not exceed a second predetermined limit, said running of said blowers and burners in both said furnaces at low fire comprising a second heating mode; running the blowers and burners in both said furnaces at high fire for a final time interval until the heating load is satisfied, said running the blowers and burners in both said furnaces at high fire comprising a third heating mode; calculating a thermal load requirement, as a function of all of said time intervals; and predetermining all of said predetermined time intervals, for a next cycle from the calculated thermal load requirement. - View Dependent Claims (7)
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Specification