EP0023907A1 - Device for use in a cistern containing liquid for the storage of thermal energy - Google Patents
Device for use in a cistern containing liquid for the storage of thermal energyInfo
- Publication number
- EP0023907A1 EP0023907A1 EP80900343A EP80900343A EP0023907A1 EP 0023907 A1 EP0023907 A1 EP 0023907A1 EP 80900343 A EP80900343 A EP 80900343A EP 80900343 A EP80900343 A EP 80900343A EP 0023907 A1 EP0023907 A1 EP 0023907A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cistern
- liquid
- chamber
- temperature
- fluid
- 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- Withdrawn
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
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
- F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
- F24D11/0221—Central heating systems using heat accumulated in storage masses using heat pumps water heating system combined with solar energy
-
- 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
- F28D20/0039—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 with stratification of the heat storage material
-
- 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
- F28D2020/0065—Details, e.g. particular heat storage tanks, auxiliary members within tanks
- F28D2020/0069—Distributing arrangements; Fluid deflecting means
-
- 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 is concerned with a device for use in a cis ⁇ tern, containing liquid, designed fo . r the storage of thermal energy, in which cistern liquid is caused to attain a condition of thermal equi ⁇ librium wherein the temperature of the liquid increases in a substan- tially continuous manner from the bottom of the cistern to the surface of the liquid, at least one pipeline being provided to the said cistern for the replenishment thereof.
- the purpose of the present invention is to solve the above-men ⁇ tioned-problem by simple means and at low cost, and this is achieved by endowing the invention with the characteristics set forth in the Claims hereafter.
- Fig. 1 shows in schematic form a device in accordance with the invention for use in a system for the storage of solar energy in a cistern containing liquid.
- Fig. 2 shows a system similar to that in Fig. 1, but designed moreover for the supply of cooled return water to a cistern.
- Fig. 3 shows a detail, in perspective and partly cut away, of an example of the possible design o a device in accordance with the invention.
- the number 1 denotes a cistern containing liquid for the storage of thermal energy, to which a pipeline 2 leads for the replen ⁇ ishment of the cistern with heated liquid, which will normally be water
- the pipeline 2 comes from a solar energy collector 3, which is itself provided with a supply line 4 via which liquid is fed from a source not specifically illustrated to the solar energy collector 3.
- the directio of flow of the liquid is indicated by arrows 5.
- the solar collector 3 is to be understood merely as an example of a hea ing device, which may equally well consist of a heat pump for the ex ⁇ ploitation of e.g. superficial geother al energy, or a heat exchanger for the extraction of thermal energy from coolant water from a nuclear power plant.
- the pipeline 2 for the heated liquid ends in an elongated chamber 6 mounted vertically in the cistern and having a length in the order of half the depth of the cistern.
- the sid walls of the chamber 6, as most cleanly indicated in Fig. 3 and more particularly described in connection with the said figure, are perfor ⁇ ated so that the water entering the chamber via pipeline 2 can pass out through the side walls into the cistern.
- heated liquid is used here to denote liquid of temperature exceeding the mean temperature of the liquid in the tank.
- the incoming liquid should thus stratify in the upper half of the cis ⁇ tern, and the chamber is therefore located in the said upper half.
- the upper half there is a draw-off pipe 7 leading to a consumer 8, from which the liquid is discharged via a pipe 9 in a manner not specificall illustrated in the figure.
- the liquid might, for example, be used as domestic water for washing, bathing etc.
- the chamber 6 If the water to be supplied to the cistern is at a temperature below the mean temperature of the water in the cistern, the chamber 6,
- OMPI WIPO is located in the lower half of the tank in order that the incoming liquid may stratify at the thermal level cor ⁇ responding to its temperature.
- two chambers 6a and 6b are according to a special characteristic of the invention, posi ⁇ tioned one above the other and assembled as a unit.
- Chamber 6a cor ⁇ responds exactly to the chamber 6 in Fig. 1, being designed to supply heated liquid to the cistern.
- Chamber 6b is designed, on the one hand, for the supply of cooled liquid, such as liquid discharged from the consumer 8 via pipeline 9, and on the other hand, for the drawing off of liquid at a temperature below the mean temperature in the cistern 1.
- the drawn-off water may, for example, be fed via pipeline 5 to the solar collector 3 as illustrated in Fig. 2. Both replenishment and drawing- off are to proceed without any appreciable disturbance to the thermal equilibrium of the liquid.
- the chambers 6a and 6b must be specially designed, e.g. in the manner set forth in Fig. 3.
- the chamber's side walls which according to a special characteristic are at least two in number, namely an inner wall 10 and an outer wall 11, consist here of two concentric perforated cylinders " differing in diameter so that the walls are spaced a certain distance apart.
- the material of the cylin ⁇ ders shall possess a low thermal capacity and be a poor conductor of heat in order to have as slight an effect as possible on the thermal stratification of the liquid in the cistern.
- the perforation shall be such that, given the rates of flow in pipelines 2, 9 and 4 and the quantities of liquid to be supplied and withdrawn, flow can proceed through the walls 10 and 11 in such a manner that the stratification is not disturbed.
- the chambers are enclosed in filter fabric, the example of embodiment illustrated in Fig. 3 being provided with two layers 12, 13, thereof.
- the outer layer 13 of filter fabric is distended by means of three annular plates 14, 15, 16, plate 15 constituting the partition between chambers 6a.and 6b and having a greater outside diameter than plates 14 and 16.
- the inner filter cloth 12 constitutes a cylinder concentric with the walls 10 and 11 and is held in position by the inner circum ⁇ ference of the annular plates 14, 15 and 16.
- the supply line 2 for the heated liquid enters from xtbove and discharges along an axis of symmetry of chamber 6a.
- feed line 9 enters from below and discharges along the axis of symmetry of chamber 6b.
- the inflow of liquid into the cistern is directed towards that level in the cistern where the mean temperature stratum is to be found.
- the ends 17, 18 of each of the chambers are given a con ⁇ ical form with the apices facing towards the interior of the respective chambers.
- the chambers need not be cylindrical in shape, but may be of square, rectangular or oval section. Variation may likewise be permitted in the number of perfor- ated side walls.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Central Heating Systems (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
Abstract
Lorsqu'on stocke de l'energie thermique dans un reservoir de stockage (1) de fluide chauffe, il est avantageux de maintenir un equilibre thermique dans le fluide lorsque l'on remplit et l'on vide le reservoir (1). Lorsqu'il y a equilibre thermique, la temperature dans le fluide monte continuellement du fond du reservoir (1) vers la surface du fluide. Le reservoir (1) est rempli au moyen d'au moins un tube (2, 9). Pour empecher toute perturbation de l'equilibre thermique lors du remplissage du reservoir, l'ouverture du tube (2, 9) est disposee dans une chambre (6), placee dans le reservoir, cette chambre ayant une longueur d'environ la moitie de la profondeur du reservoir. Les parois laterales de la chambre (10, 11) sont perforees pour permettre au fluide de s'ecouler au travers desdites parois. Lorsque l'on remplit le reservoir (1) avec un fluide ayant une temperature inferieure a la temperature moyenne du fluide dans le reservoir (1), la chambre (6) est disposee dans la moitie inferieure du reservoir. Par analogie, lorsque la temperature du fluide est superieure a la temperature moyenne du fluide dans le reservoir, la chambre (6) est disposee dans la moitie superieure du reservoir (1).When thermal energy is stored in a storage tank (1) of heated fluid, it is advantageous to maintain a thermal equilibrium in the fluid when filling and emptying the tank (1). When there is thermal equilibrium, the temperature in the fluid rises continuously from the bottom of the reservoir (1) to the surface of the fluid. The reservoir (1) is filled by means of at least one tube (2, 9). To prevent any disturbance of the thermal equilibrium during filling of the tank, the opening of the tube (2, 9) is arranged in a chamber (6), placed in the tank, this chamber having a length of approximately half of the depth of the tank. The side walls of the chamber (10, 11) are perforated to allow the fluid to flow through said walls. When the reservoir (1) is filled with a fluid having a temperature below the average temperature of the fluid in the reservoir (1), the chamber (6) is arranged in the lower half of the reservoir. By analogy, when the temperature of the fluid is higher than the average temperature of the fluid in the reservoir, the chamber (6) is arranged in the upper half of the reservoir (1).
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7901241A SE415922B (en) | 1979-02-13 | 1979-02-13 | DEVICE FOR A TERMINAL ENERGY STORAGE FOR LIQUID POOL |
SE7901241 | 1979-02-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0023907A1 true EP0023907A1 (en) | 1981-02-18 |
Family
ID=20337274
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP80900343A Withdrawn EP0023907A1 (en) | 1979-02-13 | 1980-08-25 | Device for use in a cistern containing liquid for the storage of thermal energy |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0023907A1 (en) |
DE (1) | DE3034322A1 (en) |
DK (1) | DK427980A (en) |
GB (1) | GB2089020A (en) |
NL (1) | NL8020043A (en) |
NO (1) | NO803003L (en) |
SE (1) | SE415922B (en) |
WO (1) | WO1980001714A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2533538A1 (en) * | 1982-09-27 | 1984-03-30 | Collard Trolart | Hot water storage tank |
FR2565333A1 (en) * | 1984-06-05 | 1985-12-06 | Raffinage Cie Francaise | Distribution device allowing heat storage at a variable height of a liquid reservoir and thermal insulation using such a device |
DE4208958C2 (en) * | 1992-03-19 | 1995-02-16 | Alfons Kruck | Heat storage as a buffer storage for a room heating |
DE4417138C2 (en) * | 1994-05-17 | 1996-04-18 | Alfons Kruck | Hot water stratified tank |
NL1010546C1 (en) * | 1998-11-13 | 2000-05-16 | Johannes Petrus Wesseling | Accumulation vessels for hot water heating systems. |
AT407298B (en) * | 1998-12-16 | 2001-02-26 | Kalkgruber Solar Und Umwelttec | HEAT STORAGE |
EP1846716A1 (en) * | 2005-02-11 | 2007-10-24 | Danmarks Tekniske Universitet | Inlet stratification device |
EP2752635A1 (en) | 2013-01-04 | 2014-07-09 | Danmarks Tekniske Universitet - DTU | Inlet stratification device |
-
1979
- 1979-02-13 SE SE7901241A patent/SE415922B/en unknown
-
1980
- 1980-02-12 WO PCT/SE1980/000041 patent/WO1980001714A1/en not_active Application Discontinuation
- 1980-02-12 DE DE803034322A patent/DE3034322A1/en not_active Withdrawn
- 1980-02-12 NL NL8020043A patent/NL8020043A/en not_active Application Discontinuation
- 1980-02-12 GB GB8032453A patent/GB2089020A/en not_active Withdrawn
- 1980-08-25 EP EP80900343A patent/EP0023907A1/en not_active Withdrawn
- 1980-10-08 NO NO803003A patent/NO803003L/en unknown
- 1980-10-10 DK DK427980A patent/DK427980A/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO8001714A1 * |
Also Published As
Publication number | Publication date |
---|---|
DK427980A (en) | 1980-10-10 |
GB2089020A (en) | 1982-06-16 |
SE415922B (en) | 1980-11-10 |
NO803003L (en) | 1980-10-08 |
NL8020043A (en) | 1981-03-31 |
SE7901241L (en) | 1980-08-14 |
DE3034322A1 (en) | 1981-04-09 |
WO1980001714A1 (en) | 1980-08-21 |
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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: 19801008 |
|
AK | Designated contracting states |
Designated state(s): FR |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19820727 |