CA1121800A - Integrated heat exchange and heat storage system using low-temperature thermochemical reactions - Google Patents
Integrated heat exchange and heat storage system using low-temperature thermochemical reactionsInfo
- Publication number
- CA1121800A CA1121800A CA000355946A CA355946A CA1121800A CA 1121800 A CA1121800 A CA 1121800A CA 000355946 A CA000355946 A CA 000355946A CA 355946 A CA355946 A CA 355946A CA 1121800 A CA1121800 A CA 1121800A
- Authority
- CA
- Canada
- Prior art keywords
- tubes
- heat
- heat exchange
- parallel
- vehicle
- 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.)
- Expired
Links
Classifications
-
- 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
- F28D20/003—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using thermochemical reactions
-
- 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
-
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S165/00—Heat exchange
- Y10S165/539—Heat exchange having a heat storage mass
Abstract
ABSTRACT OF THE DISCLOSURE:
An integrated heat exchange and heat storage system using thermochemical reactions, characterised in that it comprises: a bunch of parallel adjacent tubes containing the element for sotring and yielding heat; and a group of tubes parallel to the first-mentioned tubes and interposed therebetween and containing the fluid heat vehicle, this system of tubes or ducts being disposed in a receptacle whose major axis extends parallel to the axis of the tubes, the voids between the various ducts being filled with a stagnant liquid serving to facilitate heat exchange between the fluid heat vehicle and the element for storing and yielding heat.
An integrated heat exchange and heat storage system using thermochemical reactions, characterised in that it comprises: a bunch of parallel adjacent tubes containing the element for sotring and yielding heat; and a group of tubes parallel to the first-mentioned tubes and interposed therebetween and containing the fluid heat vehicle, this system of tubes or ducts being disposed in a receptacle whose major axis extends parallel to the axis of the tubes, the voids between the various ducts being filled with a stagnant liquid serving to facilitate heat exchange between the fluid heat vehicle and the element for storing and yielding heat.
Description
The present invention re~ates to an integrated heat exchange and heat storage system using thermochemical reactions.
In particular the present invention relates to an integrated system adapted to use and exploit substances in solid and paste form which are capable of exo-endothermic thermochemical reactions at temperatures below 100C, more particularly in the range between 20 and 60~C, as a means for term storage of thermal energy.
By way of example consideration willbe given to the reaction with change of phase forming the subject matter of a European Patent application published on October 31, 1979 under number 0005 009 and having the same applicant as in the present application.
This is based on the use of a reaction in a slight excess of water.
The first reaction occurs to the right at a temperature above approximately 22C with a storage capacity of approximately 80 kcal/litre. The heat absorbed is yielded in the subsequent dissociation down to temperatures below 22C. The system is in the form of a partially crystallized pasty substance with a slight excess of water, when it is shifted to the left after yielding the absorbed energy, and as a very fine suspen-sion in an aqueous solution when it is shifted to the right after absorbing heat. The average density of the system is 1.6.
Another system suitable for this invention uses reciprocal salt pairs, whose transformation temperature is 64C - i.e., the system can store heat above 64C and yield it below 64C.
According to the main feature of the invention, the integrated heat exchange and heat storage system using J.. ,.~ - 1 -11'~18~)0 thermochemical reactions comprises: a bunch of parallel adjacent tubes containing the heat exchanger element for storing and yielding the heat; and a group of tubes parallel to the first-mentioned tubes and interposed therebetween and containing the fluid heat vehicle, this system of tubes or ducts being disposed in a receptable whose major axis extends parallel to the axis of the tubes, the voids between the various ducts being filled with a stagnant liquid serving to facilitate heat exchange between the fluid heat vehicle and the element for storing and yielding heat.
According to another feature of the invention, the heat exchanger element may be an exo-endothermic mixture.
According to another feature of the invention, the fluid heat vehicle may be water.
The reactions and ingredients mentioned are exploited in the solid or pasty state, the viscosity depending on how much water is in excess and therefore upon the temperature for filling the e.g. cylindrical and preferably plastics, e.g.
polypropylene, tubes. Volume variations are absorbed by slight deformations of the plastics tubes which are closed at their ends and which have a diameter of approximately from 10 to 20 mm. A tube bunch forming a storage volume or mass is produced by combining a number of such tubes with their axes parallel to one another.
Two embodiments of the integrated system in accordance with this invention are shown in the accompanying drawings as examples onlyt without limitative manner. In these drawings:
Fig. 1 is a view in cross-section of a storage unit or module consisting of a bunch of tubes in a square box;
Fig. 2 is a view in longitudinal section of the ends of the tube bunch and associated box, and ~-~ - 2 -11i~1800 Fig. 3 is a perspective view of how various storage modules or units can be combined on~beside another and thermally insulated all the way round to provide considerable storage in a small volume. ~
-.2a -,~
Referring to Fig. 1, there can be seen a receptacle 1 for a bunch of tubes 2 which are made of plastics, such as polypropylene or polyethylene, the container or the like 1 being 2 mm thick. The bunch consists of 25 tubes made of the same material as the receptacle 1. Each tube 2 has an outside diameter of 19 mm, is 1.6 mm thick and contains a fluid or pasty storage substance 10. Disposed in the gaps between the tubes 2 coaxially thereof are tubes 3 which are also made of plastics, have an outside diameter of 8 mm, are 1 mm thick and are flowed through by the fluid heat vehicle, as a rule water 11. The same serves to supply heat during the supply phase and to recover the stored heat during the recovery phase. Heat exchange between the fluid flowing through the tubes 3 and the storage agent in the tubes 2 is by conduction through the plastics walls of the tubes and through the solid or pasty substance which is disposed in the tubes and in which the thermochemical transformation of storage and yielding of heat occurs gradually in one direction or the other.
Stagnant water is provided in gaps 12 between the tubes 2 and 3 to facilitate heat exchange between the two kinds cf tube.
The water piping 3 can be connected in parallel between the two ends of the receptacle 1 or can be subdivided into two halves connected in series and each consisting of parallel-connected tubes. Consequently, and as shown in Fig. 2, the heat vehicle can flow through the receptacle 1 in both directions, and so the input tube 4 and discharge tube 5 would be arranged at the same ends of the system.
The element shown by way of example in Figs. 1 and
In particular the present invention relates to an integrated system adapted to use and exploit substances in solid and paste form which are capable of exo-endothermic thermochemical reactions at temperatures below 100C, more particularly in the range between 20 and 60~C, as a means for term storage of thermal energy.
By way of example consideration willbe given to the reaction with change of phase forming the subject matter of a European Patent application published on October 31, 1979 under number 0005 009 and having the same applicant as in the present application.
This is based on the use of a reaction in a slight excess of water.
The first reaction occurs to the right at a temperature above approximately 22C with a storage capacity of approximately 80 kcal/litre. The heat absorbed is yielded in the subsequent dissociation down to temperatures below 22C. The system is in the form of a partially crystallized pasty substance with a slight excess of water, when it is shifted to the left after yielding the absorbed energy, and as a very fine suspen-sion in an aqueous solution when it is shifted to the right after absorbing heat. The average density of the system is 1.6.
Another system suitable for this invention uses reciprocal salt pairs, whose transformation temperature is 64C - i.e., the system can store heat above 64C and yield it below 64C.
According to the main feature of the invention, the integrated heat exchange and heat storage system using J.. ,.~ - 1 -11'~18~)0 thermochemical reactions comprises: a bunch of parallel adjacent tubes containing the heat exchanger element for storing and yielding the heat; and a group of tubes parallel to the first-mentioned tubes and interposed therebetween and containing the fluid heat vehicle, this system of tubes or ducts being disposed in a receptable whose major axis extends parallel to the axis of the tubes, the voids between the various ducts being filled with a stagnant liquid serving to facilitate heat exchange between the fluid heat vehicle and the element for storing and yielding heat.
According to another feature of the invention, the heat exchanger element may be an exo-endothermic mixture.
According to another feature of the invention, the fluid heat vehicle may be water.
The reactions and ingredients mentioned are exploited in the solid or pasty state, the viscosity depending on how much water is in excess and therefore upon the temperature for filling the e.g. cylindrical and preferably plastics, e.g.
polypropylene, tubes. Volume variations are absorbed by slight deformations of the plastics tubes which are closed at their ends and which have a diameter of approximately from 10 to 20 mm. A tube bunch forming a storage volume or mass is produced by combining a number of such tubes with their axes parallel to one another.
Two embodiments of the integrated system in accordance with this invention are shown in the accompanying drawings as examples onlyt without limitative manner. In these drawings:
Fig. 1 is a view in cross-section of a storage unit or module consisting of a bunch of tubes in a square box;
Fig. 2 is a view in longitudinal section of the ends of the tube bunch and associated box, and ~-~ - 2 -11i~1800 Fig. 3 is a perspective view of how various storage modules or units can be combined on~beside another and thermally insulated all the way round to provide considerable storage in a small volume. ~
-.2a -,~
Referring to Fig. 1, there can be seen a receptacle 1 for a bunch of tubes 2 which are made of plastics, such as polypropylene or polyethylene, the container or the like 1 being 2 mm thick. The bunch consists of 25 tubes made of the same material as the receptacle 1. Each tube 2 has an outside diameter of 19 mm, is 1.6 mm thick and contains a fluid or pasty storage substance 10. Disposed in the gaps between the tubes 2 coaxially thereof are tubes 3 which are also made of plastics, have an outside diameter of 8 mm, are 1 mm thick and are flowed through by the fluid heat vehicle, as a rule water 11. The same serves to supply heat during the supply phase and to recover the stored heat during the recovery phase. Heat exchange between the fluid flowing through the tubes 3 and the storage agent in the tubes 2 is by conduction through the plastics walls of the tubes and through the solid or pasty substance which is disposed in the tubes and in which the thermochemical transformation of storage and yielding of heat occurs gradually in one direction or the other.
Stagnant water is provided in gaps 12 between the tubes 2 and 3 to facilitate heat exchange between the two kinds cf tube.
The water piping 3 can be connected in parallel between the two ends of the receptacle 1 or can be subdivided into two halves connected in series and each consisting of parallel-connected tubes. Consequently, and as shown in Fig. 2, the heat vehicle can flow through the receptacle 1 in both directions, and so the input tube 4 and discharge tube 5 would be arranged at the same ends of the system.
The element shown by way of example in Figs. 1 and
2 measure 10 x 10 cm, is 2 m long, and has a capacity of 20 litres of which 11.5 litres consist of the actual volume 0~
available for the storage agent, 3.5 litres are stagnant water and 1.25 litre are circulating water.
As shown in Fig. 2, all the tubes 2 are closed at both ends 6, 7 which are secured in the receptacle 1 by means of two end plates 3, 9.
If 100 elements are combined as shown in Fig. 3, a heat storage and exchange volume of a total of some 2 m3 is provided containing 1.15 m3 of a mixture of salts suitable for providing heat storage by means of a thermochemical reaction.
The volume obtained by combining individual units or modules can readily be thermally insulated by placing a layer or wrapping of heat insulant 13, such as glass wool or expanded polystyrene, around the outside.
The fluid supplying the heat energy, such as hot water from solar collectors (operating in the daytime or summer) or the fluid for recovering the stored heat, such as water for heating system of a house (during the night or in the winter) can flow in various ways in series or parallel between the various modules in dependence upon the form of connection used between the supply and discharge tubes and tne end plates.
The invention described is not limited to the embodiment disclosed and the proposed system is suitable for various geometric layouts differing from those described and for the use of constructional materials and heat storage means of various kinds, including solid means and without change of phase.
available for the storage agent, 3.5 litres are stagnant water and 1.25 litre are circulating water.
As shown in Fig. 2, all the tubes 2 are closed at both ends 6, 7 which are secured in the receptacle 1 by means of two end plates 3, 9.
If 100 elements are combined as shown in Fig. 3, a heat storage and exchange volume of a total of some 2 m3 is provided containing 1.15 m3 of a mixture of salts suitable for providing heat storage by means of a thermochemical reaction.
The volume obtained by combining individual units or modules can readily be thermally insulated by placing a layer or wrapping of heat insulant 13, such as glass wool or expanded polystyrene, around the outside.
The fluid supplying the heat energy, such as hot water from solar collectors (operating in the daytime or summer) or the fluid for recovering the stored heat, such as water for heating system of a house (during the night or in the winter) can flow in various ways in series or parallel between the various modules in dependence upon the form of connection used between the supply and discharge tubes and tne end plates.
The invention described is not limited to the embodiment disclosed and the proposed system is suitable for various geometric layouts differing from those described and for the use of constructional materials and heat storage means of various kinds, including solid means and without change of phase.
Claims (5)
1. An integrated heat exchange and heat storage system using thermochemical reactions, characterised in that it comprises: a bunch of parallel adjacent tubes containing the element for storing and yielding heat; and a group of tubes parallel to the first-mentioned tubes and interposed therebetween and containing the fluid heat vehicle, this system of tubes or ducts being disposed in a receptacle whose major axis extends parallel to the axis of the tubes, the voids between the various ducts being filled with a stagnant liquid serving to facilitate heat exchange between the fluid heat vehicle and the element for storing and yielding heat.
2. A system according to claim 1, characterised in that the heat exchanger element is an exo-endothermic mixture.
3. A system according to claim 1, characterised in that the fluid heat vehicle is water.
4. A system according to claim 1, characterised in that the stagnant liquid is water or any other liquid having satisfactory conductivity and thermal inertia.
5. A system according to claim 1, characterised in that the various ducts and the receptacle are made of plastics.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT49736-A/79 | 1979-07-12 | ||
| IT49736/79A IT1162348B (en) | 1979-07-12 | 1979-07-12 | INTEGRATED SYSTEM FOR HEAT EXCHANGE AND STORAGE OF THERMAL ENERGY THROUGH LOW TEMPERATURE THERMOCHEMICAL REACTIONS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1121800A true CA1121800A (en) | 1982-04-13 |
Family
ID=11271454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000355946A Expired CA1121800A (en) | 1979-07-12 | 1980-07-10 | Integrated heat exchange and heat storage system using low-temperature thermochemical reactions |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4362207A (en) |
| EP (1) | EP0022645A3 (en) |
| CA (1) | CA1121800A (en) |
| IT (1) | IT1162348B (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2544204B1 (en) * | 1983-04-12 | 1987-09-11 | Air Liquide | BREATHING APPARATUS WITH CHEMICAL OXYGEN GENERATION |
| US4624242A (en) * | 1985-08-13 | 1986-11-25 | Examplar | Solar heat transfer and storage system |
| US4807696A (en) * | 1987-12-10 | 1989-02-28 | Triangle Research And Development Corp. | Thermal energy storage apparatus using encapsulated phase change material |
| US4976308A (en) * | 1990-02-21 | 1990-12-11 | Wright State University | Thermal energy storage heat exchanger |
| US5000252A (en) * | 1990-02-22 | 1991-03-19 | Wright State University | Thermal energy storage system |
| US5553662A (en) * | 1993-12-10 | 1996-09-10 | Store Heat & Producte Energy, Inc. | Plumbed thermal energy storage system |
| US6059016A (en) * | 1994-08-11 | 2000-05-09 | Store Heat And Produce Energy, Inc. | Thermal energy storage and delivery system |
| US6079481A (en) * | 1997-01-23 | 2000-06-27 | Ail Research, Inc | Thermal storage system |
| US6493507B2 (en) | 1997-01-30 | 2002-12-10 | Ival O. Salyer | Water heating unit with integral thermal energy storage |
| US6047106A (en) | 1997-01-30 | 2000-04-04 | Salyer; Ival O. | Water heating unit with integral thermal energy storage |
| JP4574783B2 (en) * | 2000-03-07 | 2010-11-04 | 株式会社豊田自動織機 | Hydrogen storage alloy tank |
| US6889751B1 (en) * | 2000-10-04 | 2005-05-10 | Modine Manufacturing Company | Latent heat storage device |
| US7980293B2 (en) * | 2008-03-21 | 2011-07-19 | Honeywell International Inc. | Two fluid thermal storage device to allow for independent heating and cooling |
| US20150211805A1 (en) * | 2014-01-29 | 2015-07-30 | Kunshan Jue-Chung Electronics Co., Ltd. | Thermostat module |
| DE102015002663B4 (en) | 2015-03-02 | 2020-06-10 | Grenzebach Maschinenbau Gmbh | Method and device for inexpensive cutting of profiles in vehicle tires |
| US11747094B2 (en) * | 2017-05-12 | 2023-09-05 | The Boeing Company | Hollow lattice thermal energy storage heat exchanger |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1184469A (en) * | 1957-10-17 | 1959-07-22 | Babcock & Wilcox France | Improved heat exchange by fluid circulating in a closed cycle, particularly in atomic power stations |
| US4166449A (en) * | 1975-04-28 | 1979-09-04 | Depew Walter L | Heat storage vault |
| DE2552698A1 (en) * | 1975-11-25 | 1977-06-02 | Erno Raumfahrttechnik Gmbh | Large capacity heat storage device - has filled hollow elastic balls for infill in side insulating container |
| DE2602530B1 (en) * | 1976-01-23 | 1977-05-18 | Inst Fuer Kerntechnik & Energ | LATENTHEAT STORAGE |
| CH609140A5 (en) * | 1976-05-18 | 1979-02-15 | Sulzer Ag | |
| FR2365093A1 (en) * | 1976-09-21 | 1978-04-14 | Bergeon Et Cie | Heat exchanger and accumulator using hydrated salt - has water flow path made from two parallel zigzag sheets in housing |
| DE2741829A1 (en) * | 1977-09-16 | 1979-03-22 | Dornier System Gmbh | Latent heat storage material of encapsulated wax in liquid medium - allowing heat transfer by convection |
| US4146057A (en) * | 1977-11-07 | 1979-03-27 | Rockwell International Corporation | Thermal buffer system |
| NL168929C (en) * | 1978-03-23 | 1982-05-17 | Stichting Bouwcentrum | SOLAR HEATING DEVICE AND HEAT ACCUMULATORS FOR USE THEREIN. |
-
1979
- 1979-07-12 IT IT49736/79A patent/IT1162348B/en active
-
1980
- 1980-07-04 EP EP80302287A patent/EP0022645A3/en not_active Withdrawn
- 1980-07-10 CA CA000355946A patent/CA1121800A/en not_active Expired
- 1980-07-14 US US06/168,067 patent/US4362207A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| IT1162348B (en) | 1987-03-25 |
| EP0022645A3 (en) | 1981-03-25 |
| US4362207A (en) | 1982-12-07 |
| IT7949736A0 (en) | 1979-07-12 |
| EP0022645A2 (en) | 1981-01-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |