WO2003074943A1 - Systeme de chauffage - Google Patents

Systeme de chauffage Download PDF

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Publication number
WO2003074943A1
WO2003074943A1 PCT/GB2003/000994 GB0300994W WO03074943A1 WO 2003074943 A1 WO2003074943 A1 WO 2003074943A1 GB 0300994 W GB0300994 W GB 0300994W WO 03074943 A1 WO03074943 A1 WO 03074943A1
Authority
WO
WIPO (PCT)
Prior art keywords
medium
set point
heating system
burner
temperature
Prior art date
Application number
PCT/GB2003/000994
Other languages
English (en)
Inventor
Zaiyi Liao
Original Assignee
Brittech Controls Europe Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB0205420A external-priority patent/GB0205420D0/en
Priority claimed from GB0205421A external-priority patent/GB0205421D0/en
Application filed by Brittech Controls Europe Ltd filed Critical Brittech Controls Europe Ltd
Priority to US10/513,999 priority Critical patent/US20070163522A1/en
Priority to AU2003217010A priority patent/AU2003217010A1/en
Priority to JP2003573359A priority patent/JP2005519255A/ja
Priority to EP03712332A priority patent/EP1485655A1/fr
Publication of WO2003074943A1 publication Critical patent/WO2003074943A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1048—Counting of energy consumption
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1917—Control of temperature characterised by the use of electric means using digital means

Definitions

  • This invention relates to heating systems.
  • a heating system including a heat source for heating a medium, a circulation system for circulating heated medium; a control system for controlling the temperature to which the medium is heated in accordance with a temperature set point; and an energy monitor for generating a measure of energy consumed by the system, wherein the control system is arranged for a predetermined period to set a fixed temperature set point, and to set the temperature set point for a subsequent period dependent on the energy used in the predetermined period.
  • the energy used by the system depends on the efficiency, e.g. of the boiler, on the heat loss and on demand. Efficiency and heat loss are temperature dependent, thus by fixing the temperature to which the medium, e.g. water, is heated, changes in the energy from one predetermined period to another represent the demand, higher on cold days, lower on hot days. A measure of demand is thus obtained which is used to control the temperature of the water supplied by the boiler.
  • the system can be used without reference to outside temperature.
  • a preferred system utilises a burner for providing heat to the heat source to heat the medium, and the energy monitor is arranged to measure the accumulated on time of the burner in the predetermined period.
  • the energy monitor is arranged to measure the accumulated on time of the burner at each consumption level.
  • the heat source is a boiler, the medium being water.
  • the temperature set point for water supplied by the boiler, for the subsequent period is proportional to the measure of energy consumed in the predetermined period.
  • Another aspect of the invention is based on the observation that in a heating system where individual radiators are fitted with thermostatic valves, the demand, as measured by rate of fuel use, for example, fluctuates in response to local space controlled temperature and reduces from a high start during daylight hours. In a system where individual radiators are not fitted with thermostatic valves, the demand is much less variable resulting either in the occupants of the building being uncomfortably cold e.g. in the morning or uncomfortably warm e.g. later in the day or, possibly both.
  • a heating system including a heat source for heating a medium, a circulation system for circulating heated medium; a control system for controlling the temperature to which the medium is heated in accordance with a set point and arranged to derive the set point dependent on two independent functions one of which reduces in accordance with a predetermined regime, during the passage of daylight hours.
  • a heating system which has no (or few) thermostatic radiator valves, can thus be forced to use energy in the same pattern as one which has thermostatic radiator valves, which saves energy and money, and provides a more comfortable environment for the occupants.
  • the invention provides a heating system, including a heat source for heating a medium, a circulation system for circulating heated medium; a control system for controlling the temperature to which the medium is heated in accordance with a temperature set point; and an energy monitor to generate a measure of the energy consumed by the system in successive periods during daylight hours; the control system being arranged to determine on an initial day whether or not the energy consumed in successive periods reduces significantly, and if it does not, on subsequent days to reduce the temperature set point during the passage of daylight hours.
  • the system thus automatically sets itself in accordance with the presence or absence of thermostatic radiator valves.
  • a preferred embodiment includes a burner for providing heat to the heat source to heat the medium, and the energy monitor is arranged to measure the accumulated on time of the burner in each the successive period.
  • the on time measurement is sufficiently accurate for the purpose. If in that arrangement, the burner is operable at different fuel consumption levels, the energy monitor is arranged to measure the accumulated on time of the burner at each consumption level.
  • the heat source comprises a boiler, the medium being water.
  • the other function may be of measured or inferred parameters, e.g. outside temperature.
  • Figure 1 is a block diagram of a heating system embodying the invention
  • Figure 2 is a graph useful in explaining the operation of the system of Figure 1 embodying the first aspect of the invention.
  • Figure 3 is a graph useful in explaining the operation of Figure 1 embodying the second aspect of the invention.
  • a building 2 is heated by circulating a medium, e.g. air or water, heated by a heat source.
  • a medium e.g. air or water
  • the water is circulated by a pump through radiators, not shown, from a boiler 4.
  • a temperature sensor 6 senses the temperature of the hot water outlet 8 of the boiler 4.
  • a temperature controller 10 responds to the sensor 8 to switch the boiler on or off to maintain the temperature of the outlet water within limits from a nominal temperature set point input from a set point controller 12. Alternatively, the upper and lower limits either side of the nominal temperature set point may be input from the controller 12. In either event, the temperature controller switches the boiler on at the lower limit point and off at the upper limit.
  • the system is run for an initial predetermined period each day with the nominal temperature set point fixed at the same temperature every day, e.g. 70°C.
  • the initial period may, for example, be an hour before the building is occupied and the first hour after that.
  • the set point controller logs the time the boiler is switched on to accumulate a total burn time in the period. This is fairly closely representative of the total fuel and thus energy used in this period. Inaccuracies may arise from variations in such things as calorific value of the fuel and the pressure with which it is delivered, but in practice the measurement is accurate enough to provide an improvement in control of the system.
  • the measured demand is then used to derive a water set point temperature using the relationship shown in Figure 2 which is linear between 90% demand and 10% demand.
  • Figure 2 which is linear between 90% demand and 10% demand.
  • the boiler is operable at more than one fuel consumption level, e.g. so called high burn and low burn, the times for which the boiler operates at each level is logged separately and a figure for the total demand in the period is derived.
  • the heating system when it is commissioned, it is run for a day and during daylight hours the a measure of the energy input or demand is monitored.
  • the set point controller uses an algorithm which may be conventional or may embody the first aspect of the invention, for determining the temperature set point as a function of measured or inferred parameters and logs the time the boiler is switched on to accumulate a total on time during each of successive periods, e.g. of one hour each.
  • the conventional algorithm may take into account outside temperature, for example.
  • the boiler on time for each hour is a measure of the total energy input or demand during the hour.
  • the curve 14 is representative of the kind of energy input which would be detected if the radiators had thermostatic valves and falls off during daylight hours even if the temperature set point is fixed.
  • Curve 16 is representative of the kind of energy input which would be detected if the radiators were not fitted with thermostatic valves and the temperature set point is fixed.
  • the energy input is more or less constant throughout the day leading to less comfortable conditions in the building at one or both ends of the day.
  • the set point controller 12 examines the energy usage as represented by the boiler on time and, if it detects a relatively falling usage 14 continues to determine the set point only as a function of the measured or inferred parameters for each subsequent day.
  • the temperatures set point is determined by multiplying the function of measured or inferred parameters by a falling function such as that illustrated at 18 so as to force the usage to correspond to what would be obtained by use of thermostatic radiator valves.
  • this forcing function can be applied to warm air heating systems as well as radiator systems.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)

Abstract

Dans un mode de réalisation, l'invention concerne un système de chauffage, y compris une source thermique pour chauffer un milieu, un système de circulation pour faire circuler le milieu chauffé; un système de commande pour réguler la température de chauffage dudit milieu conformément à un point de réglage de la température. Un contrôleur d'énergie génère une mesure d'énergie consommée par le système qui est fixée pour une période prédéterminée de façon à établir un point de réglage de la température fixe. Pour une période suivante, le point de réglage de la température est établi en fonction de l'énergie utilisée lors de la période prédéterminée.
PCT/GB2003/000994 2002-03-07 2003-03-07 Systeme de chauffage WO2003074943A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US10/513,999 US20070163522A1 (en) 2002-03-07 2003-03-07 Heating system
AU2003217010A AU2003217010A1 (en) 2002-03-07 2003-03-07 Heating system
JP2003573359A JP2005519255A (ja) 2002-03-07 2003-03-07 加熱装置
EP03712332A EP1485655A1 (fr) 2002-03-07 2003-03-07 Systeme de chauffage

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB0205420A GB0205420D0 (en) 2002-03-07 2002-03-07 Heating system
GB0205420.3 2002-03-07
GB0205421.1 2002-03-07
GB0205421A GB0205421D0 (en) 2002-03-07 2002-03-07 Heating system

Publications (1)

Publication Number Publication Date
WO2003074943A1 true WO2003074943A1 (fr) 2003-09-12

Family

ID=27790193

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2003/000994 WO2003074943A1 (fr) 2002-03-07 2003-03-07 Systeme de chauffage

Country Status (5)

Country Link
US (1) US20070163522A1 (fr)
EP (1) EP1485655A1 (fr)
JP (1) JP2005519255A (fr)
AU (1) AU2003217010A1 (fr)
WO (1) WO2003074943A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2620771A (en) * 2022-07-21 2024-01-24 James Jennings Peter A heating control system for a building

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8490886B2 (en) * 2007-06-28 2013-07-23 Westcast, Inc. Modulating boiler system
CN104006440A (zh) * 2013-02-26 2014-08-27 林秀麟 一种具有值班流量功能的热计量装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3626281A1 (de) * 1986-08-02 1988-02-11 Bosch Gmbh Robert Verfahren zum bestimmen der nennleistung fuer einen auf den waermebedarf eines beheizten objekts abgestimmten waermeerzeuger
DE19615749A1 (de) * 1996-04-20 1997-10-23 Buderus Heiztechnik Gmbh Verfahren zum Ermitteln und Einstellen der geeigneten Nachtabsenktemperatur an Heizungsanlagen
DE19916186A1 (de) * 1999-04-10 2000-11-16 Sieger Heizsysteme Gmbh Mit Öl oder Gas befeuerte Wärmeerzeuger

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4337893A (en) * 1980-04-07 1982-07-06 Energy Savings Parhelion Multi-phase modular comfort controlled heating system
US4373663A (en) * 1981-12-10 1983-02-15 Honeywell Inc. Condition control system for efficient transfer of energy to and from a working fluid
US4557417A (en) * 1984-11-27 1985-12-10 Ruby Ernest D Heat control
EP0260343B1 (fr) * 1986-09-17 1993-01-20 Viessmann Werke GmbH & Co. Procédé et dispositif de régulation de température pour installation de chauffage et de refroidissement
US5040725A (en) * 1988-12-20 1991-08-20 Butler Warren E Adaptive controller for forced hot water heating systems
US5115967A (en) * 1991-03-18 1992-05-26 Wedekind Gilbert L Method and apparatus for adaptively optimizing climate control energy consumption in a building
US5570659A (en) * 1994-09-28 1996-11-05 Slant/Fin Corpoiration Domestic gas-fired boiler
US5692676A (en) * 1996-08-28 1997-12-02 Walker; Robert Method and apparatus for saving energy in circulating hot water heating systems
US5775582A (en) * 1996-09-26 1998-07-07 Hammer; Jack Method and apparatus for regulating heater cycles to improve fuel efficiency
DE19735511C5 (de) * 1997-08-16 2006-11-16 Robert Bosch Gmbh Regelverfahren für Niedertemperaturheizkessel
US6402043B1 (en) * 2001-10-18 2002-06-11 John F. Cockerill Method for controlling HVAC units

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3626281A1 (de) * 1986-08-02 1988-02-11 Bosch Gmbh Robert Verfahren zum bestimmen der nennleistung fuer einen auf den waermebedarf eines beheizten objekts abgestimmten waermeerzeuger
DE19615749A1 (de) * 1996-04-20 1997-10-23 Buderus Heiztechnik Gmbh Verfahren zum Ermitteln und Einstellen der geeigneten Nachtabsenktemperatur an Heizungsanlagen
DE19916186A1 (de) * 1999-04-10 2000-11-16 Sieger Heizsysteme Gmbh Mit Öl oder Gas befeuerte Wärmeerzeuger

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1485655A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2620771A (en) * 2022-07-21 2024-01-24 James Jennings Peter A heating control system for a building
WO2024018200A1 (fr) 2022-07-21 2024-01-25 Jennings Peter James Système de commande de chauffage pour un bâtiment

Also Published As

Publication number Publication date
EP1485655A1 (fr) 2004-12-15
US20070163522A1 (en) 2007-07-19
JP2005519255A (ja) 2005-06-30
AU2003217010A1 (en) 2003-09-16

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