US20120225395A1 - Method and system for limiting water boiler heat input - Google Patents

Method and system for limiting water boiler heat input Download PDF

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Publication number
US20120225395A1
US20120225395A1 US13/038,311 US201113038311A US2012225395A1 US 20120225395 A1 US20120225395 A1 US 20120225395A1 US 201113038311 A US201113038311 A US 201113038311A US 2012225395 A1 US2012225395 A1 US 2012225395A1
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United States
Prior art keywords
boiler
water boiler
temperature
heat input
water
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Abandoned
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US13/038,311
Inventor
Sean E. Haggerty
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Haggerty Sean E
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Priority to US13/038,311 priority Critical patent/US20120225395A1/en
Publication of US20120225395A1 publication Critical patent/US20120225395A1/en
Abandoned legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT GENERATING MEANS, IN GENERAL
    • F24H9/00Details
    • F24H9/20Arrangement or mounting of control or safety devices or methods
    • F24H9/2007Arrangement or mounting of control or safety devices or methods for water heaters
    • F24H9/2035Arrangement or mounting of control or safety devices or methods for water heaters for heaters using fluid combustibles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N1/00Regulating fuel supply
    • F23N1/08Regulating fuel supply conjointly with another medium, e.g. boiler water
    • F23N1/082Regulating fuel supply conjointly with another medium, e.g. boiler water using electronic means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00Details
    • F24D19/10Arrangement or mounting of control or safety devices
    • F24D19/1006Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009Arrangement or mounting of control or safety devices for water heating systems for central heating

Abstract

A method to control the heat input into a boiler utilizing the boiler return temperature to minimize the heat input and maximize the efficiency of the boiler.

Description

    BACKGROUND
  • 1. Technical Field
  • The disclosed subject matter generally relates to a method and system for controlling and minimizing the heat input into a water boiler, while maintaining the same heat output. Particularly, the disclosed subject matter relates to a method and system that improves the overall thermal efficiency of a water boiler.
  • Heat Input relates to the amount of fuel oil, natural gas, electricity, or other energy that is needed to produce a given amount of Heat Input, commonly measure in BTUs.
  • Heat Output refers to the usable heat produced, by a device such as a water boiler, from this Heat Input, also measure in BTUs.
  • Minimizing the Heat Input while maintaining a given Heat Output improves the efficiency of the water boiler.
  • SUMMARY
  • In one aspect this invention provides a method to improve the efficiency of a water boiler. The method allows the system to limit the heat input of the water boiler while maintaining the same heat output of the boiler. The method accomplishes this by monitoring the return temperature of the heating loop to limit the heat input based on the return temperature.
  • In another aspect this invention provides a method to adjust the efficiency based on the heat demand required.
  • These aspects, as well as others, are described in more detail herein.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 depicts a Typical Single Zone Heating System; and
  • FIG. 2 depicts a New Single Zone Heating System according to one embodiment disclosed herein; and
  • FIG. 3 is a flowchart illustrating the Control Logic to maximize the efficiency of the boiler.
  • DETAILED DESCRIPTION
  • Although the disclosed subject matter has been shown and described with respect to the detailed embodiments thereof, it will be understood by those of skill in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the disclosed subject matter. In addition, modifications may be made to adapt a particular situation or material to the teachings of the subject matter without departing from the essential scope thereof. Therefore, it is intended that the disclosed subject matter not be limited to the particular embodiments disclosed in the above detailed description, but that the disclosed subject matter will include all embodiments falling within the scope of the disclosure.
  • FIG. 1 illustrates a Typical Single Zone Heating System (10). A boiler (20) converts heat input to heat output. The thermostat (22) in the heated area turns on to indicate a heat demand. Through the furnace controller (23), the circulator (24) activates and circulates water through the heating loop (25). When the circulator is active, the burner (26) activates to heat the water. The boiler temperature is maintained with the controller (23) on the boiler. This controller turns the burner (26) on when the circulator (24) is on, and will remain on unless an adjustable high temperature set point is reached or the circulator turns off. If the high temperature is reached the burner remains off until the water temperature drops to specific lower temperature set point, an un-adjustable difference from the high temperature set point. The current method allows the water temperature to continue to rise even if the Heat Loop (25) is at a high temperature and the heat demand is about to be satisfied.
  • Some water boilers integrate domestic hot water (tap water), where the water boiler maintains a temperature range constantly for the heat exchanger in the water boiler; these boilers have both a high and low settable temperature limit.
  • FIG. 2 illustrates the New Single Zone Heating system (10). This system has the same components as shown in FIG. 1, with the addition of an adjustable temperature switch (27), and a relay (28). This system monitors the return temperature of the loop with an adjustable temperature switch (27), with a relay (28) to limit the burner's on time, based on the return temperature. This allows the Heat Loop's (25) return water temperature to rise and the relay to shut off the burner based on the return temperature. Enabling the water in the heating loop to cool to a lower temperature as the heat demand is satisfied. The lower the water temperature when the heat demand is satisfied, the more efficient the heating cycle becomes.
  • By adjusting the maximum return temperature an effective cycle can be maintained. This can be applied to single zone or multiple zone systems, and water boilers with and without domestic hot water heat exchangers.
  • In a multiple zone system, if another zone activates during the cooling portion of the cycle, the cool water from the activated zone decreases the return temperature and the burner reactivates until the maximum is reached.
  • This method requires the addition thermal switch (27, FIG. 2) or thermal sensor and a relay (28, FIG. 2) to turn off the burner, no changes beyond the boiler are required. This makes retrofit of existing boilers easy as well as addition to new installations.
  • FIG. 3 defines the Control Logic of the new system. When the thermostat in the heated area calls for heat (110) it signals the controller to turn on the circulator to turn on (120). As the water flows through the Heating loop, the return temperature is monitored (130) by the thermal switch (27, FIG. 2). If the return temperature is below the set temperature, the relay (28, FIG. 2) remains in its' normally closed position. Once the water temperature reaches the set temperature the relay (28, FIG. 2) is energized to its' open state (140) and the burner shuts off. The burner will remain off until the heat demand is satisfied (the thermostat shuts off the circulator), or the return temperature falls below the set temperature (150).
  • As the heat output required to satisfy the heat demand changes, due to external temperature, the set points may be increased for colder weather, or decreased for warmer weather.
  • For unusual heat demands, an extreme cold day, a timer can be added to keep the burner on when long cycles are encountered. This bypasses the thermal switch.
  • This method may be applied to multiple zone system.
  • In a multiple zone system, if an additional zone is activated while the relay is in the open position, the cooler water from the activated zone decreases the return temperature and returns the relay (28) shown in FIG. 2, to the closed (burner on) position (160).

Claims (5)

1. This method reduces the heat input into a water boiler and increases the thermal efficiency of the water boiler.
2. This method reduces the fuel consumption of the water boiler.
3. This method allows adjustment of the boiler to maintain the thermal efficiency as the heat demand changes due to external temperature.
4. This method reduces the average maximum temperature of the water boiler.
5. This method reduces the maintenance and repair cost of the boiler due to less burner time and lower Maximum Temperature.
US13/038,311 2011-03-01 2011-03-01 Method and system for limiting water boiler heat input Abandoned US20120225395A1 (en)

Priority Applications (1)

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US13/038,311 US20120225395A1 (en) 2011-03-01 2011-03-01 Method and system for limiting water boiler heat input

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US13/038,311 US20120225395A1 (en) 2011-03-01 2011-03-01 Method and system for limiting water boiler heat input

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US20120225395A1 true US20120225395A1 (en) 2012-09-06

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2567177A (en) * 2017-10-05 2019-04-10 Easycabin Holdings Ltd Welfare unit with electric water boiler

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US2249346A (en) * 1938-10-11 1941-07-15 Jr Edward S Cornell Steam heating system and control means therefor
US2504250A (en) * 1948-03-05 1950-04-18 Gilbert & Barker Mfg Co Control system for dual firing rate oil burners
US2575325A (en) * 1948-02-14 1951-11-20 American Gas And Electric Comp Heat pump system
US2739793A (en) * 1953-04-22 1956-03-27 Servel Inc Burner control for air conditioning system
US2773488A (en) * 1952-02-21 1956-12-11 Jet Heet Inc Boiler-burner unit
US2830764A (en) * 1953-12-07 1958-04-15 John J Mcgillis Control apparatus for hot water heating systems
US2889116A (en) * 1953-05-18 1959-06-02 Jet Heet Inc Hot water heating systems
US3216209A (en) * 1963-01-29 1965-11-09 Garrett Corp Supercritical cryogenic storage system
US3241763A (en) * 1963-10-25 1966-03-22 Calmac Mfg Corp Oil-fired water and air heating system
US3254839A (en) * 1963-07-05 1966-06-07 Ace Tank And Heater Company Unitary heating system
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US3997109A (en) * 1974-01-24 1976-12-14 Amana Refrigeration, Inc. Heat exchange control system
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US4381075A (en) * 1981-12-17 1983-04-26 Thermonic Corp. Microprocessor based controller for heating system
US4449178A (en) * 1981-02-27 1984-05-15 Fluidmaster, Inc. Method and apparatus for controlled off peak load hot water heating
US4485804A (en) * 1981-01-30 1984-12-04 T. E. Sharpe Solar heat collector system
US4527246A (en) * 1982-04-14 1985-07-02 Heat-Timer Corporation Hot water heating system control device
US4699122A (en) * 1983-03-19 1987-10-13 Ruhrgas Aktiengesellschaft Storage water heater system
US4819587A (en) * 1985-07-15 1989-04-11 Toto Ltd. Multiple-purpose instantaneous gas water heater
US5226594A (en) * 1992-03-30 1993-07-13 Consolidated Natural Gas Service Company, Inc. Hot water storage tank heat exchanger system
US5361751A (en) * 1993-12-15 1994-11-08 Biggs Robert C Combination hot air furnace and hot water heater
US5692676A (en) * 1996-08-28 1997-12-02 Walker; Robert Method and apparatus for saving energy in circulating hot water heating systems
US5761925A (en) * 1995-12-21 1998-06-09 Ebara Corporation Absorption heat pump and desiccant assisted air conditioner
US5888060A (en) * 1996-04-17 1999-03-30 Velke; William H. Method and device to increase combustion efficiency heating appliances
US5966954A (en) * 1996-12-04 1999-10-19 Sanyo Electronic Co., Ltd. Air conditioning system
US20050044625A1 (en) * 2003-08-28 2005-03-03 Kommers William John Apparatus for controlling the temperature of the water in a kitchen sink
US20050229871A1 (en) * 2002-10-09 2005-10-20 Alastair Robertson Heating system and boiler therefor
US7010363B2 (en) * 2003-06-13 2006-03-07 Battelle Memorial Institute Electrical appliance energy consumption control methods and electrical energy consumption systems
US20060081584A1 (en) * 2004-09-28 2006-04-20 Christopher Norman Gaskell Building incorporating a thermal insulation assembly and method of conserving energy
US20060141407A1 (en) * 2003-03-22 2006-06-29 Neary David L Partially-open fired heater cycle providing high thermal efficiencies and ultra-low emissions
US20060225876A1 (en) * 2005-04-07 2006-10-12 Ats Japan Corp. Constant temperature controller
US7597066B2 (en) * 2006-03-27 2009-10-06 Rinnai Corporation Circulation type hot water supply device
US20100122668A1 (en) * 2008-11-17 2010-05-20 Rinnai Corporation Storage type water heater
US20100195991A1 (en) * 2009-02-03 2010-08-05 Sridhar Deivasigamani Apparatus and control method for a hybrid tankless water heater
US20100282440A1 (en) * 2007-08-01 2010-11-11 Hydox Pty Ltd Fluid Heater
US20110259322A1 (en) * 2010-01-25 2011-10-27 Htp, Inc. Method and system for controlling efficiency of heating system
US8136740B2 (en) * 2003-01-22 2012-03-20 Vast Power Portfolio, Llc Thermodynamic cycles using thermal diluent
US20120073519A1 (en) * 2010-09-26 2012-03-29 Sridhar Deivasigamani Hot water system configuration, descaling and heating methods therefore
US20150096504A1 (en) * 2013-10-07 2015-04-09 Rinnai Corporation Circulating-type hot-water supply device

Patent Citations (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2249346A (en) * 1938-10-11 1941-07-15 Jr Edward S Cornell Steam heating system and control means therefor
US2575325A (en) * 1948-02-14 1951-11-20 American Gas And Electric Comp Heat pump system
US2504250A (en) * 1948-03-05 1950-04-18 Gilbert & Barker Mfg Co Control system for dual firing rate oil burners
US2773488A (en) * 1952-02-21 1956-12-11 Jet Heet Inc Boiler-burner unit
US2739793A (en) * 1953-04-22 1956-03-27 Servel Inc Burner control for air conditioning system
US2889116A (en) * 1953-05-18 1959-06-02 Jet Heet Inc Hot water heating systems
US2830764A (en) * 1953-12-07 1958-04-15 John J Mcgillis Control apparatus for hot water heating systems
US3216209A (en) * 1963-01-29 1965-11-09 Garrett Corp Supercritical cryogenic storage system
US3254839A (en) * 1963-07-05 1966-06-07 Ace Tank And Heater Company Unitary heating system
US3241763A (en) * 1963-10-25 1966-03-22 Calmac Mfg Corp Oil-fired water and air heating system
US3967590A (en) * 1974-01-24 1976-07-06 Amana Refrigeration, Inc. Heat exchange control system
US3997109A (en) * 1974-01-24 1976-12-14 Amana Refrigeration, Inc. Heat exchange control system
US4135487A (en) * 1975-08-29 1979-01-23 Amana Refrigeration, Inc. Heat exchange control system
US4057402A (en) * 1976-06-28 1977-11-08 Institute Of Gas Technology Coal pretreatment and gasification process
US4142379A (en) * 1976-08-16 1979-03-06 Kuklinski Henry W Waste energy recovery system
US4106692A (en) * 1977-01-28 1978-08-15 Baier John F Heating system with reserve thermal storage capacity
US4263887A (en) * 1979-05-30 1981-04-28 Dowdall Donald H Forced air wood furnace system
US4485804A (en) * 1981-01-30 1984-12-04 T. E. Sharpe Solar heat collector system
US4449178A (en) * 1981-02-27 1984-05-15 Fluidmaster, Inc. Method and apparatus for controlled off peak load hot water heating
US4381075A (en) * 1981-12-17 1983-04-26 Thermonic Corp. Microprocessor based controller for heating system
US4527246A (en) * 1982-04-14 1985-07-02 Heat-Timer Corporation Hot water heating system control device
US4699122A (en) * 1983-03-19 1987-10-13 Ruhrgas Aktiengesellschaft Storage water heater system
US4819587A (en) * 1985-07-15 1989-04-11 Toto Ltd. Multiple-purpose instantaneous gas water heater
US4922861A (en) * 1985-07-15 1990-05-08 Toto Ltd. Multiple-purpose instantaneous gas water heater
US5226594A (en) * 1992-03-30 1993-07-13 Consolidated Natural Gas Service Company, Inc. Hot water storage tank heat exchanger system
US5361751A (en) * 1993-12-15 1994-11-08 Biggs Robert C Combination hot air furnace and hot water heater
US5761925A (en) * 1995-12-21 1998-06-09 Ebara Corporation Absorption heat pump and desiccant assisted air conditioner
US5888060A (en) * 1996-04-17 1999-03-30 Velke; William H. Method and device to increase combustion efficiency heating appliances
US5692676A (en) * 1996-08-28 1997-12-02 Walker; Robert Method and apparatus for saving energy in circulating hot water heating systems
US5966954A (en) * 1996-12-04 1999-10-19 Sanyo Electronic Co., Ltd. Air conditioning system
US20050229871A1 (en) * 2002-10-09 2005-10-20 Alastair Robertson Heating system and boiler therefor
US8136740B2 (en) * 2003-01-22 2012-03-20 Vast Power Portfolio, Llc Thermodynamic cycles using thermal diluent
US7074033B2 (en) * 2003-03-22 2006-07-11 David Lloyd Neary Partially-open fired heater cycle providing high thermal efficiencies and ultra-low emissions
US20060141407A1 (en) * 2003-03-22 2006-06-29 Neary David L Partially-open fired heater cycle providing high thermal efficiencies and ultra-low emissions
US7010363B2 (en) * 2003-06-13 2006-03-07 Battelle Memorial Institute Electrical appliance energy consumption control methods and electrical energy consumption systems
US20050044625A1 (en) * 2003-08-28 2005-03-03 Kommers William John Apparatus for controlling the temperature of the water in a kitchen sink
US20060081584A1 (en) * 2004-09-28 2006-04-20 Christopher Norman Gaskell Building incorporating a thermal insulation assembly and method of conserving energy
US7576301B2 (en) * 2004-09-28 2009-08-18 Freegen Research Limited Building incorporating a thermal insulation assembly and method of conserving energy
US20060225876A1 (en) * 2005-04-07 2006-10-12 Ats Japan Corp. Constant temperature controller
US7597066B2 (en) * 2006-03-27 2009-10-06 Rinnai Corporation Circulation type hot water supply device
US20100282440A1 (en) * 2007-08-01 2010-11-11 Hydox Pty Ltd Fluid Heater
US20100122668A1 (en) * 2008-11-17 2010-05-20 Rinnai Corporation Storage type water heater
US20100195991A1 (en) * 2009-02-03 2010-08-05 Sridhar Deivasigamani Apparatus and control method for a hybrid tankless water heater
US20110259322A1 (en) * 2010-01-25 2011-10-27 Htp, Inc. Method and system for controlling efficiency of heating system
US20120073519A1 (en) * 2010-09-26 2012-03-29 Sridhar Deivasigamani Hot water system configuration, descaling and heating methods therefore
US20150096504A1 (en) * 2013-10-07 2015-04-09 Rinnai Corporation Circulating-type hot-water supply device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2567177A (en) * 2017-10-05 2019-04-10 Easycabin Holdings Ltd Welfare unit with electric water boiler

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