EP1093559A1 - Systeme servant a rechauffer de l'eau non potable - Google Patents

Systeme servant a rechauffer de l'eau non potable

Info

Publication number
EP1093559A1
EP1093559A1 EP99920568A EP99920568A EP1093559A1 EP 1093559 A1 EP1093559 A1 EP 1093559A1 EP 99920568 A EP99920568 A EP 99920568A EP 99920568 A EP99920568 A EP 99920568A EP 1093559 A1 EP1093559 A1 EP 1093559A1
Authority
EP
European Patent Office
Prior art keywords
drinking water
temperature sensor
heating system
circulation pipe
heat exchanger
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.)
Withdrawn
Application number
EP99920568A
Other languages
German (de)
English (en)
Inventor
Bjorn Kim Steenberg
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.)
Danfoss AS
Original Assignee
Danfoss AS
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 Danfoss AS filed Critical Danfoss AS
Publication of EP1093559A1 publication Critical patent/EP1093559A1/fr
Withdrawn legal-status Critical Current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
    • F24D17/0078—Recirculation systems
    • 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
    • F24D10/00—District heating systems
    • F24D10/003—Domestic delivery stations having a heat exchanger
    • 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]
    • Y02B30/17—District heating
    • 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
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/14—Combined heat and power generation [CHP]

Definitions

  • the invention relates to a heating system for non- drinking water, having a heat-exchanger, the primary part of which is supplied via a forward flow pipe and a return pipe with a heat transfer medium, and the secondary part of which is provided with a circulation pipe, which comprises at least one draw-off point for hot non-drinking water, a circulation pump and a cold water in-feed, and having a control device which comprises a first temperature sensor at the initial section of the circulation pipe and a primary- side adjustment means, influenced by the temperature sensor, for the throughput of heat transfer medium.
  • a control device which comprises a first temperature sensor at the initial section of the circulation pipe and a primary- side adjustment means, influenced by the temperature sensor, for the throughput of heat transfer medium.
  • the primary part of the heat exchanger is connected to a remote heating supply network, with a control valve being inserted in the return line.
  • the temperature sensor arranged at the secondary-side heat exchanger outlet acts on the control valve and is intended to hold the temperature of the non- drinking water at a pre-set value. Nevertheless, the temperature of the non-drinking water fluctuates considerably. Both water that is too hot and water that is too cold is considered to be vexing, especially in a shower installation.
  • the invention is based on the problem of providing a heating system for non-drinking water, in which fluctuations in the temperature of the non-drinking water can be kept at a low level. That problem is solved in accordance with the invention in that a second temperature sensor influencing the adjustment means is arranged at the end section of the circulation pipe, downstream of the cold water in-feed.
  • the second temperature sensor detects the drop in water temperature that is effected at the start of drawing-off behind the cold water in-feed before this colder water enters the heat exchanger.
  • the supply of heat transfer medium to the primary part of the heat exchanger can accordingly be increased much earlier than previously, so that the non-drinking water is prevented from cooling down too much.
  • the end of the drawing-off operation is also ascertained early, so that, by reducing the primary-side supply of heat, too high a temperature of the non-drinking water is avoided.
  • the second temperature sensor is a significant distance from the heat exchanger inlet. This distance makes allowances for the fact that a heat exchanger has heat-storing properties, and therefore the transition from one steady stationary state to a different steady state requires a certain a time. The fluctuations in the non-drinking water temperature can be kept even smaller in this way.
  • the volume of the circulation pipe between cold water in-feed and heat exchanger inlet is approximately as large as the volume of the secondary part of the heat exchanger. This adaptation also contributes to keeping the temperature of the non-drinking water constant following the end of water draw-off.
  • the second temperature sensor is advantageously arranged close to the cold water in-feed.
  • the distance can be, for example, 2 to 20% of the length of the circulation pipe between cold water in-feed and heat exchanger inlet. In this way, for a given matching of the position of the cold water in-feed to the heat exchanger, the start and end of a drawing-off process can be detected at the earliest possible moment.
  • the circulation pipe between cold water in-feed and/or second temperature sensor and heat exchanger inlet is preferably 3 to 4 metres long. Such values are typical for household draw-off points. Even if other lengths should be more favourable for different systems, it is nevertheless significant that comparatively long pipe lengths, that is, of more than 1 metre, should be the aim.
  • a further advantage is obtained in that a third temperature sensor influencing the adjustment means is arranged on the return pipe.
  • the adjustment means is preferably a motorized valve.
  • Such a valve enables the throughput of heat transfer medium to be changed quickly and within comparatively wide limits.
  • a non-return valve closing in the direction of the circulation pump to be provided in the circulation pipe between the last draw-off point and the cold water in-feed. This non-return valve safeguards the through-flow direction of the circulating medium, and also the mode of operation of the control device.
  • the temperature sensors are electronic resistance sensors and an electronic control device is used.
  • the temperature sensors can be connected to the control device so that they act on the adjustment means with a pre-determined weighting.
  • the invention is explained in detail hereinafter with reference to a preferred exemplary embodiment illustrated in the drawing.
  • the single drawing shows a circuit diagram of a heating system according to the invention for non-drinking water.
  • a heat exchanger 1 is connected, with its primary part 2, by way of an inward flow pipe 3 and a return pipe 4 to a heat source 5, especially a remote heating supply network, and is supplied by this with a heated heat transfer medium.
  • the secondary part 6 of the heat exchanger 1 has an outlet 7 and an inlet 8 that are connected to one another via a circulation pipe 9.
  • a draw-off section 11 Following an initial section 10 of the circulation pipe 9 is a draw-off section 11, having several draw-off points 12, a circulation pump 13, a non-return valve 14 closing in the direction towards this pump, a cold water in-feed 15, via which cold water is introduced from a pipe 16 every time water is drawn off, and an end section 17.
  • a control device 19 provided with a setpoint adjuster 18 is connected to a first temperature sensor 20 at the initial section 10 of the circulation pipe 9, to a second temperature sensor 21 at the end section 17 of the circulation pipe 9 and to a third temperature sensor 22 at the primary-side return pipe 4.
  • the control device controls an adjustment means 23 in the form of a motorized valve, which determines the amount of primary heat transfer medium flowing through the heat exchanger 1.
  • a control circuit that is to keep the temperature of the non-drinking water at a desired value is accordingly produced.
  • the first temperature sensor 20 detects the temperature of the non-drinking water emerging from the heat exchanger 1; this temperature is furthermore to remain as constant a possible even as water is being drawn off.
  • the second temperature sensor 21 is located at the end section 17, so that the admixture of cold water occurring at the start of drawing off is detected before this cold water enters the heat exchanger 1, and the adjustment means 23 can be opened correspondingly further.
  • the second temperature sensor 21 should be a distance a (corresponding to a specific pipe length) from the heat exchanger inlet 8, so that the presence of cold water at the start of drawing off, or the termination of cold water as drawing off ceases, is detected some time before the change in temperature reaches the heat exchanger 1, and in this way the delays caused by heat storage in the heat exchanger 1 are at least partially compensated.
  • the distance a is in most cases comparatively large, and can be typically 3 or 4 metres, or possibly 1 to 5 metres.
  • the signals of the second temperature sensor 21 are superimposed in the control device 19 on the signals of the first temperature sensor 20 in a specific relationship, so that the adjustment means 23 is additionally influenced.
  • the distance a should be large enough for the thermal energy that is needed to heat up the amount of cold water present at the end of a drawing off operation in the circulation pipe 9 between the second temperature sensor 21 and the heat exchanger inlet 8 to be substantially the same as the surplus energy available in the heat exchanger 1 at this time, relative to the state in which no water is being drawn off.
  • the surplus energy is provided by the heated-up construction of the heat exchanger 1 and the amount of heat-transfer medium located in the primary part.
  • the third temperature sensor 22 sets an upper limit to the return temperature, so that overheating cannot occur.
  • the cold water in-feed 15 is likewise a comparatively large distance from the heat exchanger inlet 8.
  • the volume of the circulation pipe 9 between the cold water in-feed 15 and the heat exchanger inlet 8 should be approximately as large as the volume of the secondary part 6 of the heat exchanger 1. This ensures that the entire non-drinking water content of the heat exchanger 1 at the end of a drawing-off operation is delivered into the circulation pipe and is replaced by the following non-drinking water still containing cold water.

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)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Air Conditioning Control Device (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

Système servant à réchauffer de l'eau non potable et possédant un échangeur de chaleur (1) dont la première partie (2) est alimentée par un milieu de transfert de chaleur et la deuxième partie (6) reliée à un conduit de circulation (9). Ce dernier comporte au moins un point de soutirage (12) d'eau chaude non potable, une pompe de circulation (13) et une arrivée d'eau froide (15). Un dispositif de régulation (19) comprend un premier capteur de température (20) au niveau de la section initiale (10) du conduit de circulation (9) et des moyens de régulation côté primaire (vanne motorisée (23)) influencés par le capteur de température afin de réguler la quantité du milieu de transfert de chaleur. Un deuxième capteur de température (21) influençant les moyens de régulation, est situé au niveau de la section d'extrémité (17) du conduit de circulation (9) en aval de l'arrivée d'eau froide (15). Ce deuxième capteur de température (21) est, en particulier, situé à une distance (a) importante de l'entrée (8) de l'échangeur de chaleur. Ceci permet à la température de cette eau non potable de subir moins de fluctuations.
EP99920568A 1998-05-29 1999-05-20 Systeme servant a rechauffer de l'eau non potable Withdrawn EP1093559A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19824034A DE19824034C2 (de) 1998-05-29 1998-05-29 Brauchwasser-Erwärmungsanlage
DE19824034 1998-05-29
PCT/DK1999/000276 WO1999063278A1 (fr) 1998-05-29 1999-05-20 Systeme servant a rechauffer de l'eau non potable

Publications (1)

Publication Number Publication Date
EP1093559A1 true EP1093559A1 (fr) 2001-04-25

Family

ID=7869283

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99920568A Withdrawn EP1093559A1 (fr) 1998-05-29 1999-05-20 Systeme servant a rechauffer de l'eau non potable

Country Status (8)

Country Link
EP (1) EP1093559A1 (fr)
AU (1) AU3810599A (fr)
BG (1) BG104990A (fr)
CZ (1) CZ20004420A3 (fr)
DE (1) DE19824034C2 (fr)
EA (1) EA200001239A1 (fr)
PL (1) PL192096B1 (fr)
WO (1) WO1999063278A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT411614B (de) * 2002-08-23 2004-03-25 Autengruber Josef Vorrichtung zur entnahme von wärme aus einem wärmeträgerspeicher
DE102005036882B4 (de) * 2005-08-02 2007-09-06 Reinhold Herrmann Warmwasseraufbereitungssystem
PL225948B1 (pl) * 2014-11-13 2017-06-30 Zbigniew Tadeusz Czarko Sposob eksploatacji instalacji sanitarnej cieplej wody i instalacja cieplej wody sanitarnej

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3809893A1 (de) * 1988-03-24 1989-10-12 Steag Fernwaerme Anordnung zur uebergabe von fernwaerme an eine wassererwaermungsanlage
DE4206074C2 (de) * 1992-02-27 1998-07-16 Sandler Energietechnik Vorrichtung zur Regelung der Entnahmetemperatur von Brauchwasser mit Trinkwasserqualität
SE9601181D0 (sv) * 1996-03-27 1996-03-27 Alf Ottosson Sätt och anordning för temperaturreglering av tappvarmvatten

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9963278A1 *

Also Published As

Publication number Publication date
WO1999063278A1 (fr) 1999-12-09
DE19824034A1 (de) 1999-12-16
BG104990A (bg) 2001-08-31
EA200001239A1 (ru) 2001-06-25
PL344744A1 (en) 2001-11-19
PL192096B1 (pl) 2006-08-31
CZ20004420A3 (cs) 2002-01-16
AU3810599A (en) 1999-12-20
DE19824034C2 (de) 2002-08-22

Similar Documents

Publication Publication Date Title
US3977601A (en) System for recovering solar energy and its direct utilization
CA2249983C (fr) Technique et appareil de commande de la temperature de l'eau d'un robinet d'eau chaude
US9134037B2 (en) Equipment for producing domestic hot water
US5655710A (en) Method for controlling operated-units count of fluid heating units
US4671459A (en) Regulating device for a central heating plant containing a hot water supply
EP1093559A1 (fr) Systeme servant a rechauffer de l'eau non potable
EP0048517A1 (fr) Système de chauffage urbain ou de chauffage de groupes d'immeubles
GB2225097A (en) Water heating apparatus
EP0940636B1 (fr) Chaudière de chauffage et de préparation d'eau chaude sanitaire
AU635027B2 (en) Improvements to hot water tanks and installations equipped with such tanks
KR0148211B1 (ko) 보일러의 난방수 자동분배장치
CN102538050B (zh) 带有传感器加速器的加热系统
KR200370859Y1 (ko) 난방 및 급탕 온수 공급 시스템
EP4390239A1 (fr) Système de transport et de régulation de débit de liquide dans un système de chauffage
EP0828116A2 (fr) Système de chauffage
GB2364766A (en) Domestic hot water recirculation arrangement for a combination boiler system
GB2245959A (en) Multi-purpose water heater
JP3834421B2 (ja) 一缶多水路型給湯機 およびその制御方法
EP0747642B1 (fr) Chauffe-eau à accumulation
GB2326703A (en) Hot Water Supply System
NL8006217A (nl) Inrichting voor het leveren van warm water, alsmede een warmteleveringssysteem en inbouweenheid voorzien van een dergelijke inrichting.
JP2921177B2 (ja) 風呂釜付給湯機
SU928135A1 (ru) Закрыта вод на система централизованного теплоснабжени
WO2019198006A1 (fr) Groupe de chauffage
RU2117876C1 (ru) Закрытая водяная система централизованного теплоснабжения

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20001127

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DK FI FR GB IT NL

AX Request for extension of the european patent

Free format text: LT PAYMENT 20001127;LV PAYMENT 20001127;RO PAYMENT 20001127;SI PAYMENT 20001127

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20021206