WO2002063217A1 - Chauffe-eau a production instantanee d'eau chaude amelioree - Google Patents

Chauffe-eau a production instantanee d'eau chaude amelioree Download PDF

Info

Publication number
WO2002063217A1
WO2002063217A1 PCT/IB2002/000409 IB0200409W WO02063217A1 WO 2002063217 A1 WO2002063217 A1 WO 2002063217A1 IB 0200409 W IB0200409 W IB 0200409W WO 02063217 A1 WO02063217 A1 WO 02063217A1
Authority
WO
WIPO (PCT)
Prior art keywords
boiler
sanitary
heating
hot water
previous
Prior art date
Application number
PCT/IB2002/000409
Other languages
English (en)
Inventor
Ruggero Marchetti
Pietro Rossi
Original Assignee
Merloni Termosanitari S.P.A.
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
Application filed by Merloni Termosanitari S.P.A. filed Critical Merloni Termosanitari S.P.A.
Publication of WO2002063217A1 publication Critical patent/WO2002063217A1/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
    • F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/174—Supplying heated water with desired temperature or desired range of temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/219—Temperature of the water after heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F24H15/32—Control of valves of switching valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/36—Control of heat-generating means in heaters of burners
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention refers to a method of ambient heating and production of sanitary hot water and to boilers with instantaneous production of sanitary hot water implementing such a method.
  • the ambient heating boilers with instantaneous production of sanitary hot water for sanitary use do not have hot water tanks but they heat the water instantaneously, when required, by means of a special exchanger heated by the thermal carrier fluid that is in turn heated by the flames in the primary exchanger.
  • the thermal power required for the instantaneous heating of water is generally much higher than the maximum value required for heating the building so, normally, in single-family boilers, the thermal power that can be generated is superfluous for ambient heating but hardly sufficient to supply the quantity of hot water stated by the producer (generally 8 - 10 litres per minute at the temperature of 40 - 45 °C).
  • the producer generally 8 - 10 litres per minute at the temperature of 40 - 45 °C.
  • the air-conditioning systems mainly ensure the summer cooling or are exclusively for summer cooling and then also adapted for winter heating.
  • ventilconvectors that are controlled, each or in each room, by a corresponding room thermostat that, in summer or in winter, turns on or off the ventilator if the room temperature is too high or too low respectively, while, in the pipes, the thermal carrier fluid, kept cold or hot by the refrigerating machine or by the boiler, circulates. Therefore, these ventilconvector systems have no control on the ventilator based on the temperature of the incoming thermal carrier fluid, so, by using a boiler with instantaneous production of sanitary hot water, each time sanitary hot water is produced in winter, an unpleasant cold draught arrives from the ventilconvectors because, in the meantime, the heated thermal carrier fluid is not circulating in the pipes.
  • Fig. 1 shows, in a very schematic way, an ambient heating and hot water production plant that uses a boiler with instantaneous and indirect production of hot water, modified according to the invention, as well as ventilconvectors without control on the entry temperature of the thermal carrier fluid.
  • Fig. 2 shows, in the same schematic way, an ambient heating and hot water production plant that uses a boiler with instantaneous and direct production of hot water, modified according to the invention, as well as ventilconvectors without control on the entry temperature of the thermal carrier fluid.
  • a burner 2 a primary exchanger 3, a sanitary exchanger 4, a circulation pump 5, a three-way valve 6 controlled by means of an actuator 7, a sensor 8 for detecting the passing of the water to be heated and a regulator 9 for starting the heating are visible;
  • the sensor 8 indicates any known sensor fit for detecting one or more thermophysical characteristics necessary for the regulation and control means, as water discharge and temperature;
  • the regulator 9 indicates any known device or set of devices able to start the boiler 1 for ambient heating; for example, a room thermostat combined or not with other devices as a clock and a SUMMER/WINTER switch.
  • the three-way valve 6 is an ON/OFF valve, i.e. it does not choke but excludes one of the two circuits, the one concerning the sanitary exchanger 4 or the one concerning the ambient heating circuit 13.
  • the figure shows a by-pass valve 10 with its bypass circuit 11 and a discharge limiter 12.
  • the figure also shows an ambient heating circuit 13, (floor or ceiling) ventilconvectors 14, each controlled by a corresponding ambient thermostat 15; finally, it schematises a sanitary water circuit consisting in a cold water piping 16, in a hot water piping 17 and in a water drawing point 18; the by-pass valve 10 with its by-pass circuit 11, and the discharge limiter 12 are present only in some variants of the invention.
  • the circulation pump 5 and the burner 2 are active while air is expelled or not from the ventilconvectors 14, if controlled by the ambient thermostats 15, according to the local conditions detected by the said ambient thermostats 15; if at this point, the sensor 8 detects, in the piping of the hot water 17, the passage of the water to be heated, the actuator 7 starts the three-way valve 6 in such a way as to exclude the ambient heating circuit 13 by short- circuiting, through the sanitary exchanger 4, all the thermal carrier fluid circulating in the primary exchanger 3; as a result, if one or more ambient thermostats 15 are operating the corresponding ventilconvectors 14, they emit cold air.
  • by-pass means are provided, for example the by-pass valve 10 and the corresponding by-pass circuit 11, in order to allow always part of the thermal carrier fluid of the primary circuit to circulate in the ambient heating circuit 13 and in the ventilconvectors 14 even if the heating of the sanitary hot water is in progress due to the boiler 1.
  • said by-pass means are disabled, in manual or automatic mode; as a result, all the thermal carrier fluid of the primary exchanger 3 passes through the sanitary exchanger 4.
  • any drawback can be eliminated by simply choosing a boiler with a thermal power higher than the one considered best, in the same working condition, for a boiler according to the known state of the art; for example, with a power equal to the sum of the single powers required for the maximum hot water discharge and the maximum ambient heating requirements that can be expected in the working conditions.
  • some numbers show how to assign part of the thermal power that can be supplied by the boiler to the heating circuit also during the heating of sanitary water without inconveniences.
  • a boiler with a 23 kW power yield, a very common size, is able to heat water from 15 to 45 °C with discharges of nearly 11 litres per minute while most of the utilisations (wash-basin, shower, bidet) require not more than 6 litres per minute for each user.
  • a maximum power required for ambient heating can be reasonably calculated in approx. 7 kW.
  • the residual power allows to dispose of at least 7.5 litres per minute of hot water.
  • the sensor 8 starts the three-way valve 6 in such a way as to intercept the ambient heating circuit 13 opening the passage through the sanitary exchanger 4; however, a small part of the heated thermal carrier fluid in the primary exchanger 3 reaches the ventilconvectors 14 thanks to the by-pass 11.
  • This by-pass valve 10 can be manually controlled, set by the user or by the installer in a proper position that is a compromise between two requirements.
  • the temperature of the sanitary water can be set as in the current boilers, usually by controlling the outgoing temperature of the sanitary water and subsequent modulation of the burner flame 2.
  • the power supplied during the heating of the sanitary water must be higher than now in order to ensure the requested temperature to the sanitary water.
  • the reduced discharge to be ensured in the ambient heating circuit 13 must be controlled with a proper throttling of the by-pass valve 10. As for the temperature of the sanitary water, if it is not sufficient, this means that an excessive discharge has been requested and, in order to maintain the comfort conditions, it is enough to reduce the discharge by operating the tap of the water drawing point 18.
  • the best setting of the by-pass valve 10 can be done once and for all by the producer of the boiler 1 by limiting with proper means the maximum opening of the by-pass valve 10 or by inserting proper throttling means along the by-pass circuit 11.
  • the by-pass circuit 11 must be intercepted; this can occur manually by the user who must close completely the by-pass valve 10 or by-pass circuit 11 can be provided with an intercepting means, like a solenoid valve, operated automatically in OPEN - CLOSE position by the regulator 9 for starting the heating.
  • the by-pass valve 10 can be such solenoid valve operated by the regulator 9 for starting the heating and equipped with maximum discharge setting devices.
  • discharge limiter 12 may be a known device that simply prevents the discharge from exceeding certain preset values but, more usefully, it may consist in a known thermostatic valve that reduces the discharge only if the sanitary water has a temperature value lower than the preset value.
  • Another variant of the invention considers the control of the sanitary water temperature not by means of flame modulation but through the modulation of the by-pass valve 10.
  • the thermal carrier fluid of the primary exchanger 3 is sent to the sanitary exchanger 4 in a quantity that is necessary and sufficient to ensure the desired temperature of the sanitary water while all the remaining thermal carrier fluid of the primary exchanger 3 is sent to the ambient heating circuit 13 through the by-pass circuit 11; as for the burner 2, it can be kept at the maximum power, or placed under the control of a regulator that limits the power if, once the temperature of the sanitary water is ensured, the entry temperature in the ambient heating circuit 13 is excessive.
  • the control of the supplied power is obtained again through burner 2 flame modulation and the same occurs when only sanitary water is requested.
  • a possible variant is the one in which the three-way valve 6 is not an ON/OFF but a modulating valve, i.e. not the diverter type currently used but a mixer type, therefore able to send at the same time from the primary exchanger 3 to the sanitary exchanger 4, passing through 6.w, only the thermal carrier fluid necessary for heating the sanitary water while the remaining part of the discharge is sent to the ambient heating circuit 13 and circulates through 6.h.
  • Said variant may be implemented mainly without components and additional costs compared to the current boilers.
  • the by-pass valve 10 and the by-pass circuit 11 may not be necessary any more since all the modifications to be made to the boiler may consist in the replacement of a three-way valve 6, until now diverter type, with another one with the same size, mixer type, with the same cost, as well as in modifications of the software of the electronic device for the regulation and control with which all the modern boilers are equipped. It is clear that the behaviour of such a boiler 1 is completely similar to the one described for the previous variant.
  • the temperature of the sanitary water will be preferably set through modulation of the burner flame 2 when only sanitary water or only ambient heating is requested, while when both services are requested at the same time, the temperature of the sanitary water is set through modulation of the three-way valve 6, which deviates towards the sanitary exchanger 4 only the required power while the burner 2 is kept at the maximum power or at a reduced power if the latter exceeds the power globally required by the ambient heating and by the sanitary water.
  • the regulator 9 for starting the heating considers that the latter is not necessary, the three-way valve 6 completely closes the ambient heating circuit 13.
  • the first expedient consists in using the already mentioned properly set discharge limiter 12 in order to prevent extremely high sanitary water discharges that may cause this situation.
  • Another expedient which can be adopted together with the previous one, consists in preventing, through software or mechanical lock, the cut-off of the three-way valve 6 from closing completely the ambient heating circuit 13 or rather, from keeping the passage to the ambient heating circuit 13 sufficiently open to completely satisfy the ambient heating or to limit the above-mentioned inconveniences; as a result, in some circumstances the sanitary water may not be hot enough and the user must manually reduce the used discharge.
  • the third expedient possibly alternative to the previous one, consists in keeping, as already in the variants discussed above, the by-pass circuit 11 and if necessary the by-pass valve 10, manual or automatic.
  • Fig. 2 shows a so-called "bithermal" boiler 1.1 where the sanitary water is directly heated in the exchanger 3.1, in a circuit 17.1 completely separate from the heating one 13 along which the thermal carrier fluid is put into circulation by a pump 5.1.
  • bithermal boilers The operation of the bithermal boilers is well known and does not require other explanations, except for remembering that, each time sanitary water is requested, the circulation pump 5.1 stops, preventing the ambient heating from absorbing heat and this causes the already listed disadvantages.
  • part of the thermal energy must be sent to the ambient heating circuit, when it is active, by keeping the said pump 5.1 working.
  • Most of the circulation pumps provided in boilers have a three-position speed selector, which allows to adjust the delivery of the pump to the characteristics of the heating circuit.
  • the speed of the pump 5.1 is chosen by a control device of the boiler 1.1; nothing prevents the pump 5.1 from being identical to the one already used and/or also equipped with the already said and known manual selector providing that it is also fit for being operated from the outside of the said control device at least with two different levels of speed and for the reasons that are explained below.
  • the said pump 5.1 circulates at the first speed greater than the possible minimum speed for the pump 5.1; if sanitary hot water is requested at the same time the ambient heating is requested, the pump does not stop but set to another speed lower than the first one in such a way that part of the thermal energy absorbed by the primary exchanger 3.1 is sent to the ambient heating circuit 13.
  • the pump 5.1 may have two levels of speed absolutely fixed or the second speed may be set manually once and for all during production or when installing the boiler 1.1 according to the requirements of the specific heating plant; in this way the results obtained are identical to those supplied by the non-modulating by-pass valve 10.
  • the pump 5.1 may be fit for changing its speed from the first higher speed to the second lower speed, according to a series of steps or continuously, if operated by a control device with which the boiler 1.1 is equipped. In this way all the thermal energy exceeding the one required for achieving the requested temperature for the sanitary water can be removed limiting considerably the situations in which the burner 2 is obliged to intermittent or modulating working, as already obtained by using a modulating three-way valve 6 or by-pass valve 10.
  • the pump 5.1 with fixed or modulated speed is a technical equivalent of the bypass circuit 11 equipped with a by-pass valve 10 or of the modulated-type three-way valve 6 since, by means of the latter, it is possible to achieve the same purposes already described with the previous variants.

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)
  • Noodles (AREA)
  • Bakery Products And Manufacturing Methods Therefor (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

La présente invention se rapporte à un procédé qui permet de chauffer de l'eau à usage sanitaire à l'aide d'un chauffe-eau destiné au chauffage ambiant et à un procédé de production d'eau chaude à usage sanitaire selon lequel, si le chauffage d'eau à usage sanitaire et le chauffage ambiant sont requis en même temps, le fluide caloporteur peut continuer à circuler dans le circuit de chauffage ambiant (13). L'invention se rapporte également à un chauffe-eau équipé d'un moyen qui permet de mettre en oeuvre le procédé précité. L'invention offre l'avantage de ne pas interrompre le chauffage ambiant pendant l'alimentation en eau chaude à usage sanitaire.
PCT/IB2002/000409 2001-02-07 2002-02-06 Chauffe-eau a production instantanee d'eau chaude amelioree WO2002063217A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2001AN000008A ITAN20010008A1 (it) 2001-02-07 2001-02-07 Caldaia con produzione istantanea di acqua calda perfezionata
ITAN2001A000008 2001-02-07

Publications (1)

Publication Number Publication Date
WO2002063217A1 true WO2002063217A1 (fr) 2002-08-15

Family

ID=11437283

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2002/000409 WO2002063217A1 (fr) 2001-02-07 2002-02-06 Chauffe-eau a production instantanee d'eau chaude amelioree

Country Status (2)

Country Link
IT (1) ITAN20010008A1 (fr)
WO (1) WO2002063217A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3105312A1 (fr) * 2019-12-23 2021-06-25 Wilo Intec Pompe pour installation hydraulique, et installation hydraulique correspondante

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048517A1 (fr) * 1980-09-18 1982-03-31 AWB Apparatenfabriek Warmtebouw B.V. Système de chauffage urbain ou de chauffage de groupes d'immeubles
EP0279639A2 (fr) * 1987-02-17 1988-08-24 Hot Water Equipment Corporation Système de chauffage mixte
EP0936415A2 (fr) * 1998-02-14 1999-08-18 Robert Bosch Gmbh Installation d'alimentation d'eau chaude
EP1020785A2 (fr) * 1999-01-14 2000-07-19 Honeywell Control Systems Ltd. Système de commande du confort

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048517A1 (fr) * 1980-09-18 1982-03-31 AWB Apparatenfabriek Warmtebouw B.V. Système de chauffage urbain ou de chauffage de groupes d'immeubles
EP0279639A2 (fr) * 1987-02-17 1988-08-24 Hot Water Equipment Corporation Système de chauffage mixte
EP0936415A2 (fr) * 1998-02-14 1999-08-18 Robert Bosch Gmbh Installation d'alimentation d'eau chaude
EP1020785A2 (fr) * 1999-01-14 2000-07-19 Honeywell Control Systems Ltd. Système de commande du confort

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3105312A1 (fr) * 2019-12-23 2021-06-25 Wilo Intec Pompe pour installation hydraulique, et installation hydraulique correspondante
EP3842696A1 (fr) * 2019-12-23 2021-06-30 Wilo Intec Pompe pour installation hydraulique, et installation hydraulique correspondante

Also Published As

Publication number Publication date
ITAN20010008A1 (it) 2002-08-07
ITAN20010008A0 (it) 2001-02-07

Similar Documents

Publication Publication Date Title
US5779143A (en) Electronic boiler control
EP2839222B1 (fr) Système de distribution d'eau et procédé de mise à disposition d'eau chaude dans une installation d'eau chaude à usage domestique
US11156371B2 (en) Networked boilers and control method
US20070284454A1 (en) Secondary heating system
CA3203110A1 (fr) Unite hydraulique
US10775052B2 (en) Zoned radiant heating system and method
KR102160305B1 (ko) 급탕라인을 열원으로하는 급탕 난방 통합 배관시스템
EP2122261B1 (fr) Chaudière pour système de chauffage, en particulier pour une utilisation domestique
US4147302A (en) Home heating system control
WO2002063217A1 (fr) Chauffe-eau a production instantanee d'eau chaude amelioree
GB2568947A (en) A combi-boiler device
JP2006125722A (ja) ヒートポンプ給湯暖房システム
US20030052181A1 (en) Supplemental hot water heat for forced air furnaces
EP3321595B1 (fr) Système et procédé de chauffage radiant par zone
WO2016042312A1 (fr) Système de chauffage domestique de l'eau et de l'espace
JPH0518605A (ja) 自動給湯システムにおける給湯温度制御方法
EP0048517A1 (fr) Système de chauffage urbain ou de chauffage de groupes d'immeubles
JP2018119723A (ja) 給湯システム
GB2384552A (en) A hot water boiler which prevents excess heat build-up
JPH1019281A (ja) 温水暖房装置
JP3979909B2 (ja) 貯湯式の給湯装置
JP2018091542A (ja) 給湯システム
JP4382309B2 (ja) 貯湯式の給湯装置
JP2018091541A (ja) 給湯器
GB2086088A (en) Boiler control

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP