EP3775703A1 - Groupe de chauffage - Google Patents

Groupe de chauffage

Info

Publication number
EP3775703A1
EP3775703A1 EP19726480.7A EP19726480A EP3775703A1 EP 3775703 A1 EP3775703 A1 EP 3775703A1 EP 19726480 A EP19726480 A EP 19726480A EP 3775703 A1 EP3775703 A1 EP 3775703A1
Authority
EP
European Patent Office
Prior art keywords
domestic water
inlet
storage tank
water
group
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.)
Pending
Application number
EP19726480.7A
Other languages
German (de)
English (en)
Inventor
Jessica SAVI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP3775703A1 publication Critical patent/EP3775703A1/fr
Pending legal-status Critical Current

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
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/02—Domestic hot-water supply systems using heat pumps
    • 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
    • F24D19/1054—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water the system uses a heat pump
    • 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
    • F24D3/00—Hot-water central heating systems
    • F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
    • 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
    • F24D17/0026—Domestic hot-water supply systems with conventional heating means
    • F24D17/0031—Domestic hot-water supply systems with conventional heating means 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/04—Gas or oil fired boiler
    • 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
    • F24D2200/12—Heat pump
    • 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
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
    • F24H1/523—Heat exchangers for sanitary water directly heated by the burner

Definitions

  • the present invention relates to a heating group of a fluid, in particular water for domestic use, a heating method and a method for obtaining an improved heating group starting from a traditional heating group.
  • conventional heating groups in particular for heating domestic water, comprise: a heat source, a storage tank, configured for containing the domestic water heated by means of the heat source, and a heat exchanger group, comprising a tubular duct in fluid communication with a domestic water supply system, configured for receiving in inlet, from the water network, the domestic water to be heated, and delivering at the outlet towards the storage tank and/or to a usage water system, the sanitary water thus heated.
  • the tubular duct of the heat exchanger is arranged in the vicinity of the heat source.
  • a traditional heating group for domestic use comprises a heat pump, which is configured for supplying about 24KW of power in order to heat the domestic water in instantaneous mode, such a domestic water enters the heat exchanger, from the water supply system, at an average temperature of about 12 °C (TIN), and exits from the heat exchanger, to be supplied directly to the utilities of the usage water system at a supply temperature TER or to be stored, in the storage tank, at a storage temperature TAC equal to about 60 °C.
  • TIN average temperature of about 12 °C
  • the temperature TAC of the domestic water is typically maintained around 60 °C also to prevent the proliferation of bacteria inside the tank itself and the heated domestic water, to be supplied to the usage water system, is typically mixed, coming out of the heating group, with cold domestic water, to supply the user with domestic water at a supply temperature TER of about 38 °C or at a lower temperature, depending on the requirements.
  • the energy used to heat the domestic water in the storage tank at 60 °C is not used to the fullest, as there are greater losses due to insulation and the COP of the heat pump at 60° worsens considerably compared to for example to 40 °C.
  • Another object of the present invention is to provide a domestic water heating group which reduces energy consumption compared to traditional groups.
  • Yet another object of the present invention is to provide a domestic water heating group that is easy to implement at competitive costs.
  • a further object of the present invention is to provide a method for heating domestic water which is alternative to traditional methods.
  • an object of the present invention is to provide a method for obtaining an improved heating group starting from a traditional heating group.
  • Figure 1 shows a first embodiment of a domestic water heating group according to the present invention.
  • Figure 2 shows a perspective view of a second embodiment of a domestic water heating group according to the present invention.
  • a domestic water heating group is generally indicated with the reference numeral 1 and comprises at least one heat source 2, for example a heat pump or a gas burner in a condensation boiler, and at least one storage tank 3, configured for containing the domestic water heated by the heat source 2.
  • a heat source 2 for example a heat pump or a gas burner in a condensation boiler
  • a storage tank 3 configured for containing the domestic water heated by the heat source 2.
  • the storage tank 3 comprises at least one inlet mouth 31 and at least one tubular inlet duct 311 in fluid connection with each other and configured for receiving in inlet heated domestic water.
  • the storage tank 3 further comprises at least one first outlet mouth 32 and at least one tubular outlet duct 321 in fluid connection with each other, configured for supplying the heated domestic water from the storage tank 3.
  • the heating group 1 further comprises at least one heat exchanger group 4, which in turn comprises at least one tubular duct 41 comprising at least one inlet section 411 and at least one outlet section 412.
  • the inlet duct 41 is in fluid communication with a water supply system 5 of the domestic water, with a usage water system 6 and with the storage tank 3 by means of the tubular duct 311 and the inlet mouth 31, and is configured for receiving in inlet, from the water supply system, at the inlet section 411 thereof, the domestic water to be heated, and for supplying in outlet the domestic water thus heated, at the outlet section 412 thereof, towards the storage tank 3 at a storage temperature TAC and/or towards a usage water supply system 6, at a supply temperature TER.
  • the tubular duct 41 of the heat exchanger is, for this purpose, thermally coupled to the heat source 2, between the inlet section 411 thereof and the outlet section 412 thereof so that, in use, the heat generated by the heat source 2 can be transferred to the domestic water flowing in the tubular duct 41.
  • the heating group 1 comprises at least one domestic water mixer group 7, located upstream, with respect to the fluid feeding direction, of the inlet section 411 of the tubular duct 41 of the heat exchanger 4, such a mixer group 7 comprises at least one first inlet port 71, at least one second inlet port 72 and at least one outlet port 73 in fluid connection, respectively, with the water system 5, with the storage tank 3 and with the heat exchanger 4.
  • the mixer group 7 is configured for:
  • the storage tank 3 comprises at least one second inlet mouth 37 and at least one tubular duct 371, in fluid connection with each other and configured for drawing by a third outlet mouth 38, the domestic water fed by the water supply system 5, and for restoring the quantity of water drawn from the tank 3 by means of the first outlet mouth 32.
  • a solenoid valve For the management of this power supply there may be a solenoid valve, or the reintegration may be carried out only by exploiting the water inlet pressure which causes the tank 3 to fill with the same amount of hot water taken from the first outlet 32. If one wants to use a particular type of tank referred to as emptying, it will be necessary to manage the reintegration through a solenoid valve.
  • the mixer group 7 is of the hybrid electronic type and is capable of delivering at the outlet the domestic water to be heated at an intermediate temperature TINT which can be regulated according to the power that can be supplied by the heat source 2, so that, on leaving the heat exchanger, the temperature of the heated domestic water TAC is maintained between 38 °C and 45 °C, preferably between 39 °C and 41 °C, in the storage tank 3 and that the supply temperature TER thereof towards the usage water system 6 is about 38 °C.
  • the storage tank 3 comprises at least one second outlet mouth 33, and a tubular duct 331, between the second outlet mouth 33 of the storage tank 3 and the heat exchanger 4, thanks to the which the storage tank 3 is placed in fluid connection with the heat exchanger 4 upstream of the heat source 2 thermally coupled to the heat exchanger.
  • the inlet mouth 31 and the first outlet mouth 32 of the storage tank are located in the vicinity of the top 34 of the storage tank 3, i.e. distal to the heat exchanger 4, where the temperature of the domestic water is substantially equal to TAC, while the second outlet mouth 33 of the storage tank is closer to the bottom 35 of the storage tank 3, where the temperature of the heated domestic water is typically lower than the temperature of the domestic water in the vicinity of the top of the tank 3.
  • the heat exchanger group 4 clearly comprises at least one flow selector device 42, for example any solenoid valve or any other suitable device, between the tubular duct 331 of the storage tank 3 and the tubular duct 41 of the heat exchanger 4, to allow the introduction into the heat exchanger 4 of the heated domestic water coming from the storage tank 3 or of water at the intermediate temperature TINT coming from the mixer group 7.
  • the heat exchanger group 4 comprises another flow selector device 43, for example any solenoid valve or any other suitable device, between the tubular duct 311 of the storage tank 3 and the tubular duct 41, for example at the outlet section of the tubular duct 41 of the heat exchanger 4.
  • the heating group 1 further comprising at least one control unit (not shown in the drawings), operatively connected to the heat source 2, to the storage tank 3, to the heat exchanger 4 and to the mixer group 7, to which it is capable of sending suitable control signals and from which it can receive corresponding response signals.
  • at least one control unit (not shown in the drawings), operatively connected to the heat source 2, to the storage tank 3, to the heat exchanger 4 and to the mixer group 7, to which it is capable of sending suitable control signals and from which it can receive corresponding response signals.
  • the control unit is advantageously configured for controlling the mixer unit 7 so that it supplies domestic water at an intermediate temperature TINT, which depends on the power that can be supplied by the heat source and on the supply temperature TER and on the flow rate of the domestic water that one wants to obtain downstream of the heating group, towards the usage water system 6.
  • an object of the present invention is also a method for heating domestic water, which can preferably but not necessarily be implemented with the heating group 1 described above, which comprises the following operating steps:
  • the heating group 1 is capable of raising the water temperature by 21 °C, therefore TINT should be around 19 °C to have as a supply temperature TER equal to about 40 °C; if the required flow rate is about 14 It per minute and a power of 10 Kw of the heat source 2 is available, the heating group 1 is capable of raising the water temperature by 10.5 °C, therefore TINT should be about 29.5 °C to have a supply temperature TER of about 40 °C.
  • Kg kilograms of water in the storage tank 3 (Kg)
  • Delta2 P/(Flow rate*Cs)
  • the automatic mixer 7 allows the intermediate temperature TINT to be adjusted accordingly.
  • the raising of the water temperature TIN of the domestic water supplied by the water system 5, up to the value of the intermediate temperature TINT is obtained, according to the present invention, by the mixing group 7, by mixing, in a manner known for the man skilled in the art, domestic water supplied by the water supply system 5 with domestic water coming from the storage tank 3.
  • the coefficient of performance COP increases as the temperature of the domestic water in the storage tank 3 decreases, so that, for a temperature set at 60 °C it is equal to 3.12, while for a temperature set at 40 °C it is equal to 5.26 (at 5 °C room temperature).
  • the optimal setting of the mixer 7 provides for setting the storage temperature TAC in the tank equal to the supply temperature TER of the hot water so as to always make the heat pump work at the minimum temperature and thus have the highest COP.
  • the heating group 1 may be advantageously obtained starting from a traditional heating group comprising : at least one storage tank 3, configured for containing the domestic water heated by the heat source 2, wherein the storage tank 3 comprises at least one inlet mouth 31 and at least one tubular inlet duct 311, in fluid connection with each other and configured for receiving in inlet heated domestic water, and at least one first outlet mouth 32 and at least one tubular duct 321, in fluid connection with each other and configured for supplying the heated domestic water from the storage tank 3; as well as at least one heat exchanger group 4, comprising at least one tubular duct 41 having at least one inlet section 411 and at least one outlet section 412, thermally coupled to the heat source 2 between the inlet section 411 thereof and the outlet section 412 thereof, and in fluid communication with a water supply system 5 of domestic water to be heated and a usage water supply system 6 of heated domestic water, wherein the tubular duct 41 is configured for receiving in inlet, from the water supply system 5 , at the inlet section
  • Said method provides for installing at least one mixer group 7 for said domestic water, upstream of the inlet section 411 of the tubular duct 41 of the exchanger group 4, the mixer group 7 having at least one first inlet port 71, at least one second inlet port 72 and at least one outlet port 73 respectively in fluid connection with the water supply system 5, with the storage tank 3 and with the exchanger group 4, in a manner such the mixer group 7, during use:
  • the domestic water thus mixed having an intermediate temperature TINT, between the temperature TIN of said domestic water supplied by the water supply system 5 and the temperature of the heated domestic water TAC, supplied by the storage tank (3), and wherein the intermediate temperature TINT is adjustable as a function of the power suppliable by the heat source 2, and of the supply temperature TER and of the flow rate that one wishes to provide for the usage water supply system 6.

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)
  • Water Supply & Treatment (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)

Abstract

La présente invention concerne un groupe de chauffage d'eau domestique comprenant au moins une source de chaleur (2) ; au moins un réservoir de stockage (3), conçu pour contenir l'eau domestique chauffée par la ou les sources de chaleur (2), le ou les réservoirs de stockage (3) ayant au moins une ouverture d'entrée (31) et au moins une conduite d'entrée tubulaire (311), en communication fluidique l'une avec l'autre et conçues pour recevoir en entrée de l'eau domestique chauffée, et au moins une première ouverture de sortie (32) et au moins une conduite tubulaire (321), en communication fluidique l'une avec l'autre et conçues pour fournir l'eau domestique chauffée à partir du ou des réservoirs de stockage (3) ; au moins un groupe d'échangeurs de chaleur (4), comprenant au moins une conduite tubulaire (41) ayant au moins une section entrée (411) et au moins une section sortie (412), la ou les conduites tubulaires (41) étant en communication fluidique avec : un système d'alimentation en eau (5) de l'eau domestique, un système d'alimentation en eau (6) ainsi que le ou les réservoirs de stockage, au moyen de ladite ou desdites conduites tubulaires (311) et de ladite ouverture d'entrée (31), et étant conçue pour recevoir dans l'entrée, à partir du système d'eau (5), au niveau de sa section entrée (411), l'eau domestique à chauffer, et fournir dans la sortie au niveau de sa section sortie (412), vers le ou les réservoirs de stockage (3) à une température de stockage TAC et/ou vers un système d'eau d'utilisation (6) à une température d'alimentation TER, l'eau domestique chauffée, la ou les conduites tubulaires (41) étant accouplées thermiquement à la ou aux sources de chaleur (2) entre sa ou ses sections entrées (411) et sa ou ses sections sorties (412). Le groupe de chauffage (1) comprend au moins un groupe mélangeur (7) pour l'eau domestique, placé en amont de la ou des sections entrées (411) de la ou des conduites tubulaires (41) du ou des groupes d'échangeurs (4), le ou les groupes mélangeurs (7) ayant au moins un premier orifice d'entrée (71), au moins un second orifice d'entrée (72) et au moins un orifice de sortie (73) respectivement en communication fluidique avec le système d'alimentation en eau (5), avec le ou les réservoirs de stockage (3) et avec le ou les groupes d'échangeurs (4), le ou les groupes mélangeurs (7) étant conçus pour : recevoir en entrée l'eau domestique, à une basse température TIN, provenant du système d'eau (5), au niveau du premier orifice d'entrée (71), recevoir l'eau domestique chauffée en sortie depuis la ou les premières ouvertures de sortie (32) du ou des réservoirs de stockage (3) au niveau du second orifice d'entrée, et mélanger l'eau domestique ainsi reçue et fournir en sortie, au niveau de l'orifice de sortie (73), en communication fluidique avec la ou les sections entrées (411) du ou des groupes d'échangeurs (4), l'eau domestique ainsi mélangée, ayant une température intermédiaire TINT comprise entre la température TIN de l'eau domestique alimentée par le système d'alimentation en eau (5) et la température de l'eau domestique chauffée TAC, fournie par le ou les réservoirs de stockage (3).
EP19726480.7A 2018-04-11 2019-04-10 Groupe de chauffage Pending EP3775703A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT201800004389 2018-04-11
PCT/IB2019/052955 WO2019198006A1 (fr) 2018-04-11 2019-04-10 Groupe de chauffage

Publications (1)

Publication Number Publication Date
EP3775703A1 true EP3775703A1 (fr) 2021-02-17

Family

ID=62751472

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19726480.7A Pending EP3775703A1 (fr) 2018-04-11 2019-04-10 Groupe de chauffage

Country Status (3)

Country Link
US (1) US20210123609A1 (fr)
EP (1) EP3775703A1 (fr)
WO (1) WO2019198006A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1000210C2 (nl) * 1995-04-24 1996-10-25 Apparatenfabriek Warmtebouw B Combiketel met verbeterde prestatie.
JP4546273B2 (ja) * 2005-02-02 2010-09-15 リンナイ株式会社 給湯システム
FR2928442B1 (fr) * 2008-03-06 2010-12-17 Mer Joseph Le Installation de production d'eau chaude sanitaire
US9170030B2 (en) * 2009-04-21 2015-10-27 Panasonic Intellectual Property Management Co., Ltd. Storage hot water supplying apparatus, hot water supplying and space heating apparatus, operation control apparatus, operation control method, and operation control program
JP6138550B2 (ja) * 2013-03-29 2017-05-31 株式会社ガスター 熱源装置
JP5928511B2 (ja) * 2014-03-28 2016-06-01 ダイキン工業株式会社 給湯装置

Also Published As

Publication number Publication date
WO2019198006A1 (fr) 2019-10-17
US20210123609A1 (en) 2021-04-29

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