EP1230520A1 - Conduit de soutirage pour eau chaude - Google Patents

Conduit de soutirage pour eau chaude

Info

Publication number
EP1230520A1
EP1230520A1 EP00980112A EP00980112A EP1230520A1 EP 1230520 A1 EP1230520 A1 EP 1230520A1 EP 00980112 A EP00980112 A EP 00980112A EP 00980112 A EP00980112 A EP 00980112A EP 1230520 A1 EP1230520 A1 EP 1230520A1
Authority
EP
European Patent Office
Prior art keywords
draw
conduit
water
storage vessel
inlet opening
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.)
Granted
Application number
EP00980112A
Other languages
German (de)
English (en)
Other versions
EP1230520B1 (fr
Inventor
Evert Sjoerdsma
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.)
Energieonderzoek Centrum Nederland ECN
Original Assignee
Energieonderzoek Centrum Nederland ECN
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 Energieonderzoek Centrum Nederland ECN filed Critical Energieonderzoek Centrum Nederland ECN
Publication of EP1230520A1 publication Critical patent/EP1230520A1/fr
Application granted granted Critical
Publication of EP1230520B1 publication Critical patent/EP1230520B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the invention relates to a draw- off conduit for transporting water from a hot-water heater to a draw-off point.
  • draw- off conduits are the cause of loss of energy and water, which loss results from cooling of hot water which, after water has been drawn off a first time at a draw-off point, remains in the draw-off conduit.
  • the water which has remained in the draw-off conduit after water has been drawn off the first time and which has since cooled is first allowed to run off by a user, which means a loss of water and energy.
  • draw-off losses can assume substantial proportions, depending on the length of a draw-off conduit and the frequency of tapping.
  • a draw-off conduit of the type specified in the preamble which according to the invention is connected in the vicinity of the draw-off point to a thermally insulated storage vessel and comprises control means for storing water from this draw-off conduit in that storage vessel and filling this draw-off conduit with cold water immediately following drawing of water from the draw-off point, and extracting water from that storage vessel at the start of a repeated drawing of water from that draw- off point.
  • the storage vessel is provided on its underside with an outlet opening closable by means of a non- return valve, in which non-return valve an inlet opening is provided.
  • the inlet opening preferably has a smaller diameter than the outlet opening.
  • the storage vessel is more preferably provided with a pressure-independent flow limiter employed as outflow limiter .
  • the draw-off conduit according to the invention is connected to the storage vessel via a thermally insulating conduit piece. . ⁇ t t I- 1 1
  • the slide takes up a rest position between the lateral outlet opening and the lateral inlet opening, wherein the draw-off conduit is connected to the cold water conduit, or takes up an operating position between the lateral outlet opening and the axial inlet opening, wherein the draw-off conduit is connected to the supply tank.
  • Fig. 1 shows a schematic view of a first embodiment of a draw-off conduit according to the invention
  • Fig. 2 shows a view in longitudinal section of a storage vessel for the draw-off conduit shown in fig. 1
  • Fig. 3 is a schematic view of a second embodiment of a draw-off conduit according to the invention
  • Fig. 4 shows a view in longitudinal section of a switching device for the draw-off conduit shown in fig. 3.
  • Corresponding components are designated in the drawings with the same reference numerals.
  • Fig. 1 shows a geyser 1 (for instance in the attic of a house above a bathroom) , which is connected via a short draw-off conduit 2 to a first draw-off tap 3 (for instance in that bathroom) , and which via a long draw- off conduit 4 is connected to a second tap 5 (for instance in the kitchen of the house) .
  • a reversed vacuum bottle 6 connected to draw-off conduit 4 by means of a conduit piece 41 is placed in the vicinity of the second draw-off tap 5, with outer bottle 7, vacuum chamber 8 and inner bottle 9, the opening 10 of which is closed by a drilled- through non- return valve 11.
  • Vacuum bottle 6 provides a saving of draw-off losses in draw-off conduit 4 in the following manner.
  • the vacuum bottle 6 is filled for about 70% with hot water (level II) . Situated above the water level is a compressed volume of air which is maintained by the continuous degassing of freshly supplied water.
  • draw-off tap 5 is opened the pressure in draw-off conduit 4 falls to about 10% of its original value, as a result of which hot water is pressed by the compressed air out of vacuum bottle 6 into draw-off conduit 4, where it mixes with the cold water present in this conduit 4.
  • Mixed hot water thus flows from draw-off tap
  • the water flowing into vacuum bottle 6 rises again to an equilibrium level II, wherein the air bubble is compressed to a pressure equal to the pressure in draw-off conduit 4.
  • draw-off tap 5 Upon subsequent opening of draw-off tap 5, the above described cycle is repeated.
  • a draw-off conduit 4 provided with a vacuum bottle 6 provides the advantage that hot water flows therefrom immediately the tap 5 is opened, which results in a saving of both water and energy relative to draw- off conduits without vacuum bottle.
  • Figure 2 shows in more detail the stainless steel vacuum bottle 6 of fig.
  • Vacuum bottle 6 can withstand a pressure of 8 bar, the highest occurring pressure in draw-off conduit 4.
  • the opening is closed by means of a plug 14 which is sealed with an O-ring 13 and in which is formed an outlet opening 15 which is closed by a non- return valve 11, in which an inlet opening 16 is drilled, wherein the diameter of inlet opening 16 is smaller than that of outlet opening 15.
  • Arranged in inlet opening 16 is a cleaning pin 17 which is freely movable over determined distances.
  • vacuum bottle 6 is connected using a coupling nut 20 to the conduit piece 41 to draw-off conduit 4 via a conduit piece 19 of a thermally insulating plastic material sealed with O-ring 18.
  • a pressure- independent flow limiter 21 which provides a constant outflow speed, irrespective of the pressure in vacuum bottle 6.
  • the figure further shows a low-voltage heating element 22 arranged in plug 14, using which element a quantity of water in vacuum bottle 6 can be kept at the correct temperature, also in the case of prolonged storage of this quantity.
  • a continually supplied power of about 3 Watt will suffice, which, including the own use of the plug-in transformer, results in an annual consumption of about 40 kWh. This consumption is negligible compared to the annual energy saving which can be realized with the vacuum bottle.
  • Fig. 3 shows a boiler 23 with heating element 24
  • the draw-off conduit 26 for a boiler 24 heated electrically or with gas is connected to a switching valve 27 which connects draw- off conduit 26, subject to the pressure therein, to a conduit 28 to boiler 24 or cold water conduit 23.
  • the operation of vacuum bottle 6 is set forth above in the elucidation of fig. 1, and will only be repeated insofar as necessary for a good understanding.
  • dra -off tap 5 is opened the pressure in draw-off conduit 4 falls, as a result of which hot water is pressed by the compressed air out of vacuum bottle 6 into draw-off conduit 26, where it mixes with the cold water present in this conduit 26, and as a result of which the draw-off conduit 26 is connected to boiler 24 by switching valve 27.
  • Fig. 4 shows the switching valve of fig. 3 in more detail in a rest position, wherein the draw-off tap 5 is closed and the water in conduits 28, 26 and 23 has come to a standstill.
  • Switching valve 27 comprises a cylindrical housing 29 with an axial inlet opening 30 to cold water conduit 23, a lateral inlet opening 31 to boiler conduit 28, a lateral outlet opening 32 to draw- off conduit 26 and a slide 34 displaceable in this cylinder 27, wherein the lateral outlet opening 32 is placed closer to the axial inlet opening 30 than the lateral inlet opening 31 and, depending on the pressure in draw-off conduit 26, the slide 34 takes up a rest position between the lateral outlet opening 32 and the lateral inlet opening 31, wherein draw-off conduit 26 is connected to cold water conduit 23, or takes up an operating position between the lateral outlet opening 26 and the axial inlet opening 30, wherein draw-off conduit 26 is connected to boiler conduit 28, and thus to boiler 24.
  • the switching takes place by means of a piston 35 which is connected to slide 34 and enclosed under pre- pressure of a spiral spring 33. If a pressure difference occurs over piston 35, it moves to the right counter to the pressure of spring 33, as a result of which the slide 34 closes the cold water conduit 23 and leaves clear the connection between boiler conduit 28 and tap water conduit 26.
  • the pressure difference occurs as a result of a small constriction 36 in outlet opening 32.
  • the full pressure of cold water conduit 23 is always on the left-hand side of piston 35, this pressure being admitted via a first internal channel 37, and the (variable) pressure of tap water conduit 26, which is admitted via a second internal channel 38, is always on the right-hand side of piston 35.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Pipeline Systems (AREA)
  • Water Treatment By Sorption (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Cookers (AREA)
EP00980112A 1999-11-18 2000-11-08 Conduit de soutirage pour eau chaude Expired - Lifetime EP1230520B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL1013603A NL1013603C2 (nl) 1999-11-18 1999-11-18 Tapleiding voor warm water.
NL1013603 1999-11-18
PCT/NL2000/000813 WO2001036878A1 (fr) 1999-11-18 2000-11-08 Conduit de soutirage pour eau chaude

Publications (2)

Publication Number Publication Date
EP1230520A1 true EP1230520A1 (fr) 2002-08-14
EP1230520B1 EP1230520B1 (fr) 2004-08-11

Family

ID=19770276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00980112A Expired - Lifetime EP1230520B1 (fr) 1999-11-18 2000-11-08 Conduit de soutirage pour eau chaude

Country Status (6)

Country Link
EP (1) EP1230520B1 (fr)
AT (1) ATE273486T1 (fr)
AU (1) AU1741201A (fr)
DE (1) DE60012963T2 (fr)
NL (1) NL1013603C2 (fr)
WO (1) WO2001036878A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6938581B2 (en) * 2003-05-30 2005-09-06 Chart Inc. Supplemental water heater tank and system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2969451A (en) * 1958-05-29 1961-01-24 Ajax Magnethermic Corp Hot water heaters
JPS58127026A (ja) * 1982-01-23 1983-07-28 Toho Gas Kk 給湯装置
US5072717A (en) * 1990-04-16 1991-12-17 Doerte Laing Hot water priming device
DE9111942U1 (de) * 1991-09-20 1991-11-07 Mekkiou, Ferhat, Dipl.-Ing., 1000 Berlin Wasserspareinrichtung für sanitäre Anlagen mit Warmwasserbereiter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0136878A1 *

Also Published As

Publication number Publication date
DE60012963T2 (de) 2005-08-25
ATE273486T1 (de) 2004-08-15
NL1013603C2 (nl) 2001-05-21
WO2001036878A1 (fr) 2001-05-25
AU1741201A (en) 2001-05-30
EP1230520B1 (fr) 2004-08-11
DE60012963D1 (de) 2004-09-16

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