WO2009095907A2 - Système de chauffage d'eau - Google Patents

Système de chauffage d'eau Download PDF

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Publication number
WO2009095907A2
WO2009095907A2 PCT/IL2009/000103 IL2009000103W WO2009095907A2 WO 2009095907 A2 WO2009095907 A2 WO 2009095907A2 IL 2009000103 W IL2009000103 W IL 2009000103W WO 2009095907 A2 WO2009095907 A2 WO 2009095907A2
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WO
WIPO (PCT)
Prior art keywords
water
heating system
primary tank
water heating
dispensing
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/IL2009/000103
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English (en)
Other versions
WO2009095907A3 (fr
Inventor
Ilan Borenshtein
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Individual
Original Assignee
Individual
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Filing date
Publication date
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Publication of WO2009095907A2 publication Critical patent/WO2009095907A2/fr
Publication of WO2009095907A3 publication Critical patent/WO2009095907A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/0015—Domestic hot-water supply systems using solar energy
    • F24D17/0021—Domestic hot-water supply systems using solar energy with accumulation of the heated water
    • 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
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for 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
    • F24H15/223—Temperature of the water in the water storage tank
    • 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
    • F24H15/238—Flow rate
    • 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
    • F24H15/246—Water level
    • F24H15/248—Water level of water storage tanks
    • 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
    • F24H15/281—Input from user
    • 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
    • F24H15/31—Control of valves of valves having only one inlet port and one outlet port, e.g. flow rate regulating 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
    • F24H15/335—Control of pumps, e.g. on-off control
    • 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
    • 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
    • F24H15/395—Information to users, e.g. alarms
    • 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
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • F24H15/45—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based remotely accessible
    • 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
    • F24H9/00—Details
    • F24H9/12—Arrangements for connecting heaters to circulation pipes
    • F24H9/13—Arrangements for connecting heaters to circulation pipes for water heaters
    • F24H9/133—Storage heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/08—Electric heater
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/14—Solar energy
    • 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
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/08—Storage tanks
    • 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
    • F24D2240/00—Characterizing positions, e.g. of sensors, inlets, outlets
    • F24D2240/10—Placed within or inside of
    • 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
    • F24D2240/00—Characterizing positions, e.g. of sensors, inlets, outlets
    • F24D2240/22—Placed at bottom position
    • 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
    • F24H15/242—Pressure
    • 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
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal
    • 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
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage

Definitions

  • the present invention pertains to a water heating system, and specifically to a water heating system providing hot water of substantially constant temperature.
  • An electric water heater is a consumer appliance used for boiling water and possibly maintaining it at constant temperature. It is typically used to provide a source of hot water for household use where hot clean water is required. Electric water heaters are widely used to heat water for baths, washing clothes, cooking and so on.
  • European Patent EP 0 526 668 discloses a heater for liquid comprising a tank having an inlet for cold liquid and an outlet for hot liquid, an electrically operated valve means to control the flow of liquid into the tank through the inlet, and a heating means to heat the liquid in the tank.
  • the control means is adapted to control (i) water temperature between upper and lower limits, and (K) the water level between predetermined upper and lower values.
  • the water temperature is controlled by activating/deactivating the heating means, and the water level is controlled by opening/closing the inlet cold water valve respectively.
  • a water heating system designed to provide hot water at a constant temperature, the system comprising:
  • a primary tank connected to a supply pipe and a dispensing pipe; • a heating element configured for heating water within the primary tank;
  • the system thus enables a user to dispense hot water from the primary tank without the introduction of unheated water thereto, thus maintaining a substantially constant temperature of dispensed water.
  • it enables a user to heat a partially filled tank of water and dispense it, thus saving the energy required to heat a foil tank of water when the amount of heated water needed is less than the capacity of the primary tank.
  • the water heating system may further comprise a dispensing pump configured for supplying sufficient pressure for dispensing water from the primary tank.
  • the pump may be self- activating, i.e., have a means configured to determine when it should be activated.
  • the water heating system may further comprise an outlet valve configured for controlling flow within the dispensing pipe.
  • the air valve may be configured to close spontaneously in response to a predetermined level of water within the primary tank.
  • the water heating system may further comprise a solar heating unit configured for heating water within the primary tank using incident solar radiation.
  • Solar inlet and outlet valves configured to regulate the flow of water between the primary tank and the solar heating unit may be provided, as well as a secondary pump configured for facilitating circulation of water between the primary tank and the solar heating unit.
  • the water heating system may further comprise a mixing device disposed within the primary tank and being configured for circulating the water therewithin.
  • the water heating system may further comprise an auxiliary tank configured to store water drawn from the primary tank.
  • An auxiliary pump configured to circulate water between water the primary tank and the auxiliary tank, may further be provided.
  • an auxiliary inlet valve and/or an auxiliary outlet valve may be provided to regulate flow between the auxiliary tank and the primary tank.
  • the water heating system may further comprise means for remote operation of one or more of the elements of the system (i.e., valves, pumps, heating elements, mixing device, etc.).
  • the water heating system may further comprise a controller configured to direct the operation of the elements of the system.
  • the controller may comprise a user interface comprising a user input device and a display device.
  • the user input device may be selected from the group comprising a keypad, one or more knobs, a touch-sensitive screen, and a voice-recognition interface.
  • the display device may be selected from the group comprising LEDs, one or more LCDs, a speaker, a screen, and a touch- sensitive screen.
  • the controller may be configured to close the inlet valve and open the air valve, for example prior to dispensing of water. It may be further configured to close the air valve when the water level within the primary tank is at or above a predetermined level. It may be further configured to open the inlet valve when the water level in the primary tank is at or below a predetermined level. It may be further configured to activate the dispensing pump.
  • the terms "open” and “close”, as well as all other appropriate terms relating to actions taken by the controller et al. are to be understood in their broadest meaning, including ensuring that the element is in the required state.
  • the controller can be understood to have “closed” a valve even if the valve was previously closed and no action needs to be taken in that regard, by checking the status of the valve and determining that it is closed.
  • the controller may be configured to close the inlet valve, open the air valve, and bring the level of water in the primary tank to a predetermined level prior to heating. This may be accomplished, for example, by transferring the excess water to the auxiliary tank.
  • the controller may also be configured to open the inlet and air valves, and bring the level of water in said primary tank to a predetermined level (i.e., by filling) prior to heating. It may also be configured to close the inlet valve and open the air valve when flow is detected within the dispensing pipe. It may be further configured to open the inlet valve when the level of water within the primary tank reaches a predetermined level after commencement of dispensing, and/or after a predetermined amount of time has elapsed since the last dispensing.
  • the controller may be further configured to permit a user to control one or more elements of the system thereby.
  • a method for providing heated water comprising:
  • the method may further comprise reducing the level of water within the primary tank prior to heating.
  • the method may further comprise heating water within the primary tank during dispensing.
  • the method may further comprise opening the inlet valve when the level of water within the primary tank reaches a predetermined level after commencement of dispensing.
  • the method may further comprise opening the inlet valve after a predetermined amount of time has elapsed since the last dispensing.
  • the method may further comprise closing the air valve when the water level within the primary tank is at or above a predetermined level.
  • the method may further comprise closing the inlet valve and opening the air valve upon commencement of flow within the dispensing pipe.
  • a system for use within a tank of a water heating system for adjusting the height of an inlet to a dispensing pipe comprising a float configured to remain at a fixed position relative to the top surface of water within the tank, an end portion of the dispensing pipe being connected to the float such that it remains below the top surface.
  • the system may further comprise a vertical guide rod disposed within the tank, and a traveling element configured to move along the rod in tandem with the float.
  • the float may constitute the traveling element.
  • the traveling element may be formed as a ring.
  • the end portion of the dispensing pipe may be made of a flexible material.
  • the system may further comprise a stopper configured to prevent the traveling element from descending below a predetermined level.
  • Fig. 1 is a schematic illustration of a liquid heating system according to the present invention
  • Fig. 2 illustrates a height-adjusting system for use with the liquid heating system illustrated in Fig. 1; and Fig. 3 illustrates the temperature of water within a tank of the liquid heating system illustrated in Fig. 1 during use compared to that in a conventional water heating system.
  • a water heating system 10 comprises a primary tank 20 for accommodating therein water such as water, either heated or for being heated, a heating element 30 disposed within the primary tank for heating the water, an air valve 40, a cold water supply pipe 100 for carrying fresh water to the primary tank, and a hot water dispensing pipe 110 for carrying heated water therefrom, and an optional dispensing pump 50. If the primary tank 20 is located at a sufficient height, the dispensing pump 50 may not be necessary.
  • the water heating system may comprise an auxiliary tank 25 connected to the primary tank 20, whose purpose will be described below. Auxiliary inlet and outlet valves 25a, 25b are provided to control flow to and from the primary tank 20, respectively, and an auxiliary pump 26 is provided to circulate the water between the primary tank and the auxiliary tank 25.
  • the heating element 30 may be of any desired type, for example an electric resistance coil, a gas-powered heating element, etc.
  • An inlet valve 120 is provided to control flow through the supply pipe 100 to the primary tank 20, and a dispensing device, such as outlet valve 130, is provided to control flow of water through the dispensing pipe 110 from the primary tank.
  • the outlet 105 of the supply pipe 100 may be disposed at or near the bottom of the primary tank 20, and the inlet 115 to the dispensing pipe 110 may be disposed at or near the top of the water level within the primary tank 20. This allows new (cold) water to be introduced into the primary tank 20 near the bottom where cold water tends to accumulate, and heated water to be dispensed from near the top of the primary tank where hot water tends to accumulate.
  • the outlet 105 and/or inlet 115 may be fixed in any desired location.
  • the water heating system may further comprise a mixing device 90 disposed within the primary tank 20 and being adapted to circulate the water within the primary tank. In this way, the water within the primary tank is maintained at a substantially uniform temperature.
  • the water heating system 10 allows for a varying level of water within the primary tank 20.
  • a height-adjusting mechanism 180 may be provided to ensure that the inlet 115 moves with the height of the water within the primary tank 20.
  • the height-adjusting mechanism 180 comprises a vertical guide rod 182, a traveling ring 184 positioned therearound such that is may travel freely along the length of the guide rod without becoming free therefrom, and a float 186, for example made of a non-dense material;, designed to remain at or near the top of the surface of the water when attached to the ring.
  • the height-adjusting mechanism may further comprise a stopper 185 disposed at or near the bottom of the primary tank 20, configured to prevent the ring 184 from descending below a predetermined level. The purpose of this stopper will be explain below.
  • the ring 184 may be designed such that build-up of scale thereupon and on the guide rod 182 will not negatively impact its performance over the life of the water heating system 10.
  • An entrance portion 188, which contains the inlet 115, of the dispensing pipe 110 within the primary tank 20 is made from a flexible material and is attached to the ring 184 such that the inlet 115 is always submerged in the water and in such a way so as to travel with the ring without encumbering its movement along the rod.
  • the float 186 In use, as the water level in the primary tank 20 changes, the float 186 maintains the ring 184 at or near the top of the water.
  • the flexible entrance portion 188 moves with the ring, which ensures that the inlet 115 is always submerged near the top of the water level within the primary tank 20, which allows heated water to be dispensed from near the top thereof.
  • the stopper 185 prevents the ring 184 from descending to such a level that the inlet 115 will be taking in water from the very bottom of the primary tank 20, where debris tends to accumulate.
  • ring 184 and the float 186 are illustrated in Fig. 2 as constituting two separate elements, they may be embodied by a single element, for example as a ring which is designed to remain at or near the top of the surface of the water.
  • the height-adjusting mechanism 180 as described with reference to Fig. 2 is a non-limiting example, and any suitable arrangement to maintain the proper position of the inlet 115 of the dispensing pipe 110 within the primary tank
  • the air valve 40 is disposed at the top of the primary tank 20 and adapted to selectively allow the interior of the primary tank to be in fluid communication with the surrounding atmosphere during a filling thereof or dispensing therefrom. It may be designed to be activated externally, e.g., by a controller or by a user, and/or designed so as to close spontaneously (i.e., automatically) when the water level approaches it. In this way, when the primary tank 20 is being filled, the user does not have to make certain that the air valve 40 is closed when the primary tank is filled. It will be appreciated that the air valve 40 may be embodied by two separate valves, a first configured to selectively allow fluids to enter the primary tank 20, and a second configured to selectively allow fluids to exit the primary tank.
  • the water heating system 10 may comprise or be associated with a solar heating unit 34 configured for exploiting incident solar radiation to heat water within the primary tank 20.
  • the solar heating unit 34 comprises a solar collector 35 and a fluid path 36 for carrying water between the primary tank 20 and the solar heating unit 34.
  • Solar inlet and outlet valves 37a, 37b are provided to regulate flow of water between the primary tank 20 and the solar heating unit 34. Circulation of water within the fluid path 36 may be performed passively or by means of an optional pump 38.
  • a controller 45 may be provided to direct the operation of the water heating system.
  • the controller is configured for selectively directing operation of at least some of the inlet valve 120, outlet valve 130, air valve 40, solar inlet and outlet valves 37a, 37b, heating element 30, pumps 26, 38, 50, etc.
  • the broken line in Fig. 1 leading from the controller to various elements of the water heating system 10 is for illustrative purposes only, and does not indicate nor imply physical locations of connections therebetween, nor any connective relationship between elements of the system to one another.
  • the controller 45 may comprise a user interface 46, which may include at least a user input device 47 such as a keypad, knobs, or a voice-recognition interface, and a display device 48, such as a screen or a combination of different display elements, such as LEDs 5 LCDs, a speaker, etc.
  • the input device 47 and display device 48 may be integrated with one another, for example by providing a touch-sensitive screen which both accepts user input and displays information.
  • the user interface 46 may be partially or fully accessible remotely, for example via a TCP/IP connection, including over the internet.
  • a plurality of sensors is further provided in order to facilitate operation of the water heating system 10.
  • These sensors may be configured to provide input to the controller 45.
  • one or more temperature sensors such as thermocouples
  • level sensors such as thermocouples
  • pressure sensors such as thermocouples
  • flow sensors to determine whether water is flowing with the various pipes
  • the water heating system may be used in any one of several modes of operation.
  • the controller 45 may direct one or more elements of the system 10 to operate as necessary, optionally based on input received from one or more of the sensors. It will be appreciated that the mode may be determined by the user, and communicated to the system 10 by the input device 47, and may be indicated on the display device 48.
  • the water is heated to a predetermined temperature, either by the heating element 30, the solar heating unit 34, or both.
  • the inlet valve 120 is closed, and the outlet valve 130 and solar inlet and outlet valves 37a, 37b remain open (the solar inlet and outlet valves may remain open as long as the water level remains above them, in order to prevent ingress of air into the solar heating unit 34).
  • the inlet valve 120 may close in response to a user- generated signal.
  • a flow sensor in the dispensing pipe may detect the flow of water therewithin (indicating use of heated water from the system 10), and the controller may direct that the inlet valve 120 be closed in response.
  • any other appropriate system may be in place to determine when the inlet valve 120 is to be closed without departing from the spirit and the scope of the present invention, hi addition, if the user beings dispensing water before the predetermined temperature is reaches, the heating element remains active until the temperature is reached.
  • the air valve 40 is opened, i.e., bringing the interior of the primary tank 20 into fluid communication with the surrounding atmosphere. This may be accomplished by a direction from the controller 45, or by providing an air valve 40 which opens spontaneously when the water level drops.
  • the dispensing pump 50 is activated in order to compensate for the pressure which is no longer being supplied by the supply pipe 100, thus allowing dispensing of heated water from the primary tank 20.
  • the inlet valve 120 may be opened when the flow though the dispensing pipe has stopped, a predetermined amount of time thereafter, after the level of water in the primary tank drops to a predetermined level, by a user-generated signal, etc.
  • the system operates in an economy mode, only heating the amount of water desired by the user.
  • the user sets the amount of water to be heated up, for example based on an expected need.
  • the auxiliary pump 26 and auxiliary inlet and outlet valves 25a, 25b are activated to draw water from the primary tank to the auxiliary tank 25 so that it is not heated unnecessarily.
  • the air valve 40 is opened, establishing fluid communication between the interior of the primary tank 20 and the surrounding atmosphere, thus allowing ingress of air to displace the water as it is being drawn to the auxiliary tank 25.
  • the inlet valve 120 is closed to prevent ingress of new water.
  • the heating element 30 heats only the required amount of water from the supply pipe 100, and the outlet valve 130 may be closed to prevent backflow of water from the dispensing pipe 110.
  • the inlet valve 120 remains closed, so that the heated water in the primary tank 20 is not cooled by incoming unheated water during dispensing, resulting in hot water of a substantially uniform temperature over the course of dispensing.
  • the air valve 40 may be closed.
  • the water level may fall below either one of the solar inlet and outlet valves 37a, 37b.
  • the valves are closed, in order to prevent ingress of air into the solar heating unit 34, which may adversely affect it.
  • the system may be designed such that these valves are be closed by the user, or the controller 45 may determine whether the valves should be opened or closed, for example using a level sensor, and control the opening and closing of the valves accordingly.
  • the solar heating unit may be used to heat the water in the primary tank 20, either by itself or as supplemental heating.
  • the system may be designed to prevent the user from lowering the level of water within the primary tank 20 to be below the level of the solar inlet and outlet valves 37a, 37b.
  • the heating element is active until the temperature of the water within the primary tank 20 reaches a predetermined temperature T 2 , at which point the heating element is deactivated.
  • a second temperature T which may be, for example, a predetermined number of degrees below T 2
  • the heating element is reactivated until the temperature of the water within the primary tank reaches T 2 . In this way, once the temperature of the water within the primary tank 20 reaches the predetermined temperature, it remains in the range between T 1 and T 2 .
  • the controller may allow a user to manually control each element of the system, either directly or via the user interface 46. Limits for certain functions may be imposed by the controller 45 in order to prevent catastrophic or otherwise undesirable consequences resulting from improper use of the system 10. The physical elements of the system 10 may also be designed to protect against some or all of these consequences.
  • controller 45 may be configured to control the system 10 to operate as a conventional water heating system, i.e., it will ensure that the inlet valve 120 remains open and that the air valve 40 remains closed during dispensing of hot water.
  • the water heating system 10 may be designed to operate without a controller.
  • the valves may be provided with means which enable a user to control them from a convenient location remote from the primary tank 20.
  • a switch which ensures that the inlet valve 120 is closed and that the air valve 40 is open, which the user may activate prior to dispensing heated water, in order to maintain a constant temperature thereof.
  • the air valve 40 should be provided so as to close by itself when the primary tank 20 is full or nearly full.
  • Fig. 3 presenting a comparison of the temperature of the water in the water heating system 10, compared with the temperature of water in a conventional water heating system of one type.
  • Curves 505 and 510 depict, respectively, the temperatures of water within the water heating system 10 and a conventional water heating system. As seen, the temperatures of the water within the two systems are about the same during the time region 520 which corresponds to the heating of the water within the primary tank 20, while no water is being dispensed. Dispensed hot water is of substantially constant temperature during dispensing of the water, which is indicated in time region 530. On the contrary, the temperature of the water within the conventional water heating system falls during this period due to refilling the primary tank 20 by cold water.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Computer Hardware Design (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

L'invention concerne un système de chauffage d'eau conçu pour amener de l'eau chaude à une température constante, le système comprenant un réservoir principal relié à un tuyau d'alimentation et à un tuyau de distribution, un élément chauffant configuré pour chauffer l'eau à l'intérieur du réservoir principal, une soupape d'admission configurée pour commander le flux à l'intérieur du tuyau d'alimentation, et une soupape d'air configurée pour mettre sélectivement l'intérieur dudit réservoir principal en communication fluidique avec l'extérieur de celui-ci.
PCT/IL2009/000103 2008-01-28 2009-01-28 Système de chauffage d'eau Ceased WO2009095907A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL189087A IL189087A0 (en) 2008-01-28 2008-01-28 A system for liquid heating whilst saving energy and method of using the same
IL189087 2008-01-28

Publications (2)

Publication Number Publication Date
WO2009095907A2 true WO2009095907A2 (fr) 2009-08-06
WO2009095907A3 WO2009095907A3 (fr) 2010-04-01

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PCT/IL2009/000103 Ceased WO2009095907A2 (fr) 2008-01-28 2009-01-28 Système de chauffage d'eau

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IL (1) IL189087A0 (fr)
WO (1) WO2009095907A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITRM20100484A1 (it) * 2010-09-20 2012-03-21 Giuseppe Moscato Dispositivo economizzatore perfezionato di acqua ed energia per scaldabagni elettrici
EP2392865A3 (fr) * 2010-06-07 2014-05-21 PAW GmbH & Co. KG Procédé de fonctionnement d'au moins une installation thermique solaire et installation thermique solaire
FR3069909A1 (fr) * 2017-08-07 2019-02-08 Thierry Steclebout Dispositif de decouplage et d'hybridation d'energies renouvelables pour le chauffage des batiments
WO2019102273A1 (fr) * 2017-11-21 2019-05-31 Bhat K M Mr Balakrishna Système de chauffage solaire d'eau

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19501319A1 (de) * 1995-01-18 1996-07-25 Forbach Gmbh Offener Warmwasserspeicher
DE10356503A1 (de) * 2003-12-03 2005-07-07 Minebea Co., Ltd. Pumpenmodul für ein Warmwasserversorgungssystem
DE202004018823U1 (de) * 2004-12-06 2005-02-24 Rohner, Andreas Warmwasserschichtspeicher

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2392865A3 (fr) * 2010-06-07 2014-05-21 PAW GmbH & Co. KG Procédé de fonctionnement d'au moins une installation thermique solaire et installation thermique solaire
ITRM20100484A1 (it) * 2010-09-20 2012-03-21 Giuseppe Moscato Dispositivo economizzatore perfezionato di acqua ed energia per scaldabagni elettrici
FR3069909A1 (fr) * 2017-08-07 2019-02-08 Thierry Steclebout Dispositif de decouplage et d'hybridation d'energies renouvelables pour le chauffage des batiments
WO2019030637A3 (fr) * 2017-08-07 2019-06-20 Thierry Steclebout Dispositif de decouplage et d'hybridation d'energies renouvelables
WO2019102273A1 (fr) * 2017-11-21 2019-05-31 Bhat K M Mr Balakrishna Système de chauffage solaire d'eau

Also Published As

Publication number Publication date
IL189087A0 (en) 2008-11-03
WO2009095907A3 (fr) 2010-04-01

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