EP1247049A2 - Chauffe-eau electrique a forte isolation thermique - Google Patents
Chauffe-eau electrique a forte isolation thermiqueInfo
- Publication number
- EP1247049A2 EP1247049A2 EP01903926A EP01903926A EP1247049A2 EP 1247049 A2 EP1247049 A2 EP 1247049A2 EP 01903926 A EP01903926 A EP 01903926A EP 01903926 A EP01903926 A EP 01903926A EP 1247049 A2 EP1247049 A2 EP 1247049A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- tank
- water heater
- panels
- outer casing
- envelope
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 238000009413 insulation Methods 0.000 title claims description 17
- 239000011810 insulating material Substances 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 239000006261 foam material Substances 0.000 claims abstract description 5
- 229920002635 polyurethane Polymers 0.000 claims description 9
- 239000004814 polyurethane Substances 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000012212 insulator Substances 0.000 claims 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 7
- 239000011496 polyurethane foam Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 4
- 230000001413 cellular effect Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 239000004604 Blowing Agent Substances 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000000930 thermomechanical effect Effects 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000007728 cost analysis Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- 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
- F24H1/18—Water-storage heaters
- F24H1/181—Construction of the tank
- F24H1/182—Insulation
Definitions
- the present invention relates to electric water heaters and relates more particularly to improving the thermal insulation of electric water heaters.
- Water heaters generally include a tank and a heater for the water in the tank.
- the tank is placed in an outer envelope between the inner wall of which and the outer wall of the tank is arranged a thermal insulating material such as polyurethane whose thermal conductivity is of the order of 0.023 W / mK for polyurethane foams rigid currently marketed, using gases such as cyclopentane or mixtures of cyclopentane and n-pentane as blowing agent.
- a thermal insulating material such as polyurethane whose thermal conductivity is of the order of 0.023 W / mK for polyurethane foams rigid currently marketed, using gases such as cyclopentane or mixtures of cyclopentane and n-pentane as blowing agent.
- CFC-11 which was the blowing agent for rigid polyurethane foams, made it possible to obtain a thermal conductivity of the order of 0.017 W / m.K.
- the new polyurethane foams have a much lower amount of insulation (around 30%) compared to rigid polyurethan
- the invention aims to remedy the degradation of the thermal conductivity of the polyurethane due to the change in the expansion gases by creating a water heater whose thermal insulation is improved compared to conventional insulation. It therefore relates to an electric water heater comprising a tank and a device for heating the water located in the tank, the latter being arranged in an outer envelope with the interposition of a thermal insulating material, characterized in that the the outer casing is of generally square section, the thermal insulating material comprises vacuum insulating panels provided along the flat walls of the outer casing, an insulating foam material being placed in the voids formed between the tank, the vacuum insulating panels and the outer casing, and the vacuum insulating panels are arranged over at least the upper half of the height of the tank. According to particular characteristics: - The heating device includes regulation means with very low reaction inertia.
- - Fig.1 is an elevational and sectional view of a water heater according to the invention.
- - Fig.2 is a cross-sectional view of the water heater of Figure 1;
- - Fig.3 is a graph showing a test of the thermomechanical regulation of a water heater;
- - Fig.4 is a graph showing a test of the electronic regulation with low thermal inertia according to the invention.
- the electric water heater shown in Figure 1 has a tank 1 for containing the water to be heated.
- a heating device 2 in the form of an electrical resistance supplied from the sector by means of a regulation device 3 connected to a sensor 4 of the temperature prevailing in the lower part of the tank.
- the device for regulating the supply of the electrical resistance is associated with a temperature sensor 4 with very low reaction inertia.
- the tank 1 is surrounded by an outer casing 5 of square section. Between the tank and the envelope are arranged along the flat walls of the envelope, for example rectangular panels 6 of vacuum insulating material.
- a panel of vacuum insulating material is made of a cellular material placed in a sealed envelope. Before closing the envelope, the cellular material is subjected to a vacuum enabling vacuum to be produced in said cellular material.
- the materials usually used in vacuum insulation panels allow the panels to have a thermal conductivity which varies between 0.005 and 0, 0010 W / mK for internal panel pressures between 10 and 100 Pa abs.
- the side panels 6 of vacuum insulating material extend over at least the upper half of the height of the tank 1 so that the lower part of the tank is not isolated by the panels 6 above.
- the panels 6 arranged along the side walls of the casing 5 are separated by intervals 8 located at the corners of the casing 5 and in which are arranged shims 9 polyurethane for positioning the tank 1 in the casing 5.
- a polyurethane foaming operation is carried out in order to fill the voids formed between the tank 1, the panels 6 and 7 and the casing 5 with foam.
- the polyurethane foam stiffens the assembly and fills the void due to the cylindrical shape of the tank 1.
- the square envelope allows the use of insulating panels such as panels 6 of greater width.
- the width of the panels of vacuum insulating material is calculated to allow free passage for the polyurethane foam during foaming.
- a water heater produced in the manner described above has a number of advantages.
- the insulation is asymmetrical between the top and the bottom, because in use the lower part of the water heater usually only contains cold water.
- Insulation is economical in vacuum insulation panels to limit the additional cost.
- a square geometry with rounded corners is adapted to generate an energy saving as such and allows easy integration of vacuum insulating panels which are not very deformable.
- An electronic regulation with low reaction inertia makes it possible to reduce the inertia of the reaction of the heating device to the information given by the temperature sensor 4.
- the dimensions of the panels of vacuum insulating material are given below.
- the tank is centered inside the envelope 5 using shims 9 cut from polyurethane and placed in the corners of the envelope.
- the panels of vacuum insulating material are fixed tangentially to the tank using double-sided adhesive material.
- the polyurethane foam is injected into the gaps left free between the tank 1, the panels 6,7 and the casing 5.
- the high and low thermostat set points of 61 ° C and 67 ° C respectively, the thermostat probe located at the bottom of the water heater and the ambient temperature equal to 20 ° C.
- the distribution of losses by wall can be calculated using the global exchange coefficients.
- Table 2 groups the results for the four above-mentioned water heaters.
- Another approach to compare the four options is to base yourself on an identical end state and to vary the set temperature to obtain the same end temperature.
- Table 3 summarizes the results obtained for the four above-mentioned water heaters with identical setpoint, the setpoint being the same as for the static loss regime (61/67 ° C) and the ambient temperature being equal to 20 ° C.
- Table 4 illustrates the results of these simulations and indicates the racking performance at constant final temperature.
- the losses are equal to the losses in static loss regime since the initial temperature and the final temperature are identical.
- the water heater according to the invention allows a considerable energy saving.
- a total cost analysis has made it possible to verify that the water heater according to the invention allows significant energy savings and that its manufacturing cost associated with its cost of use is lower than that of conventional water heaters.
- the temperature sensor of the thermomechanical system although measuring highly variable temperatures during withdrawals as indicated by the dotted curves, generates a delay which causes an average temperature rise at the top of the heater. water from 67 to 72 ° C. These 5 additional degrees are useless and cause an overconsumption of energy of the order of 30 to 40%.
- the regulation when the regulation is without delay, it is possible to maintain an average temperature of 65 ° C ⁇ 2 ° C. This unnecessary phenomenon of overheating of the water at the top of the tank is all the more marked as the insulation is effective. Regulation without delay or with low inertia of reaction is therefore all the more necessary as the insulation is carried out with particularly insulating vacuum insulation panels.
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-Pump Type And Storage Water Heaters (AREA)
- Details Of Fluid Heaters (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0000359 | 2000-01-12 | ||
| FR0000359A FR2803652B1 (fr) | 2000-01-12 | 2000-01-12 | Chauffe-eau electrique a forte isolation thermique |
| PCT/FR2001/000090 WO2001051860A2 (fr) | 2000-01-12 | 2001-01-11 | Chauffe-eau electrique a forte isolation thermique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1247049A2 true EP1247049A2 (fr) | 2002-10-09 |
| EP1247049B1 EP1247049B1 (fr) | 2006-05-24 |
Family
ID=8845844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01903926A Expired - Lifetime EP1247049B1 (fr) | 2000-01-12 | 2001-01-11 | Chauffe-eau electrique a forte isolation thermique |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1247049B1 (fr) |
| AU (1) | AU2001231882A1 (fr) |
| DE (1) | DE60119887D1 (fr) |
| FR (1) | FR2803652B1 (fr) |
| WO (1) | WO2001051860A2 (fr) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMI20020255A1 (it) * | 2002-02-11 | 2003-08-11 | Getters Spa | Processo per l'introduzione di un sistema isolante in una intercapedine |
| US7621238B2 (en) | 2005-11-23 | 2009-11-24 | Bradford White Corporation | Water heater and system for insulating same |
| AT503131B1 (de) * | 2006-03-28 | 2007-08-15 | Teufel Arnold | Wärmespeicher |
| FR2902858A1 (fr) | 2006-06-27 | 2007-12-28 | Air Liquide | Installation comprenant au moins un equipement a isoler thermiquement |
| US9086235B2 (en) * | 2006-11-30 | 2015-07-21 | Praxair Technology, Inc. | Insulation arrangement |
| JP4920468B2 (ja) * | 2007-03-26 | 2012-04-18 | ニチアス株式会社 | 断熱容器及びその製造方法 |
| DE202011050315U1 (de) * | 2011-05-31 | 2012-09-03 | Christoph Jaeger | Pufferspeicher |
| EP2700886A3 (fr) * | 2012-08-23 | 2016-09-07 | Vaillant GmbH | Accumulateur d'eau chaude |
| JP6206265B2 (ja) * | 2014-03-13 | 2017-10-04 | 三菱電機株式会社 | 貯湯式給湯機 |
| JP6252368B2 (ja) * | 2014-06-18 | 2017-12-27 | 三菱電機株式会社 | 貯湯式給湯機 |
| JP6332123B2 (ja) * | 2015-04-16 | 2018-05-30 | 三菱電機株式会社 | 貯湯式給湯機 |
| DE102015221562A1 (de) * | 2015-11-04 | 2017-05-04 | Robert Bosch Gmbh | Wärmespeicher |
| JP2018162933A (ja) * | 2017-03-27 | 2018-10-18 | パナソニックIpマネジメント株式会社 | 貯湯タンクユニットおよびそれを備えた給湯機 |
| DE102019001629A1 (de) * | 2019-03-08 | 2020-09-10 | Stiebel Eltron Gmbh & Co. Kg | Warmwasser-Kleinspeicher |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8630582U1 (de) * | 1986-11-14 | 1987-01-08 | Joh. Vaillant Gmbh U. Co, 5630 Remscheid | Speicher, insbesondere Warmwasserspeicher |
| DE4418108B4 (de) * | 1994-05-24 | 2006-03-30 | Stiebel Eltron Gmbh & Co. Kg | Warmwasserspeicher mit geschäumtem Dämmantel |
-
2000
- 2000-01-12 FR FR0000359A patent/FR2803652B1/fr not_active Expired - Fee Related
-
2001
- 2001-01-11 WO PCT/FR2001/000090 patent/WO2001051860A2/fr not_active Ceased
- 2001-01-11 AU AU2001231882A patent/AU2001231882A1/en not_active Abandoned
- 2001-01-11 DE DE60119887T patent/DE60119887D1/de not_active Expired - Lifetime
- 2001-01-11 EP EP01903926A patent/EP1247049B1/fr not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0151860A3 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2001051860A3 (fr) | 2002-01-17 |
| FR2803652A1 (fr) | 2001-07-13 |
| EP1247049B1 (fr) | 2006-05-24 |
| FR2803652B1 (fr) | 2002-06-14 |
| DE60119887D1 (de) | 2006-06-29 |
| WO2001051860A2 (fr) | 2001-07-19 |
| AU2001231882A1 (en) | 2001-07-24 |
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| Date | Code | Title | Description |
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| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: CLODIC, DENIS Inventor name: TOULEMONDE, CHARLES Inventor name: ZOUGHAIG, ASSAD |
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Effective date: 20040319 |
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