HEAT STORAGE SYSTEM

• US 20110146940A1
• Filed: 03/09/2010
• Published: 06/23/2011
• Est. Priority Date: 03/09/2009
• Status: Active Grant

• Current Assignee: Rawema Countertrade Handelsgesellschaft MbH
• Original Assignee: Rawema Countertrade Handelsgesellschaft MbH
• Inventors: Weber, Stefan, Golbs, Andreas
• Granted Patent: US 9,389,024 B2
• Time in Patent Office: Days
• US Class Current: 165/10
• CPC Class Codes: F24D 17/0015 using solar energy F24D17/0036 takes precedence
• CPC Class Codes: F24D 17/0026 with conventional heating means F24D17/0036 takes precedence
• CPC Class Codes: F24D 19/1051 for domestic hot water
• CPC Class Codes: F24D 2220/10 Heat storage materials, e.g. phase change materials or static water enclosed in a space
• CPC Class Codes: F28D 20/02 using latent heat
• CPC Class Codes: F28D 20/021 the latent heat storage material and the heat-exchanging means being enclosed in one container F28D20/023 - F28D20/028 take precedence
• CPC Class Codes: F28D 20/028 Control arrangements therefor
• CPC Class Codes: F28D 2020/0082 Multiple tanks arrangements, e.g. adjacent tanks, tank in tank
• CPC Class Codes: Y02B 10/20 Solar thermal
• CPC Class Codes: Y02E 60/14 Thermal energy storage

Abstract

The present invention relates to a heat storage system with a plurality of storage tanks, in which a latent heat storage medium is disposed, and with a conduit system with supply conduits for supplying heat into the storage tanks and with discharge conduits for removing heat from the storage tanks, wherein the conduit system includes one or more valves by means of which at least one supply conduit to at least one of the storage tanks and/or at least one discharge conduit from at least one of the storage tanks can be shut off or be varied in its flow rate, and with a control unit which is connected with the one or more valves and is configured such that it actuates the same.

Claims

1. A heat storage system comprising a plurality of storage tanks in which a latent heat storage medium is disposed;

and a conduit system with supply conduits for supplying heat into the storage tanks and discharge conduits for removing heat from the storage tanks, wherein the conduit system includes one or more valves by means of which at least one supply conduit to at least one of the storage tanks and/or at least one discharge conduit from at least one of the storage tanks can be shut off or be varied in its flow rate, and a control unit which is connected with the one or more valves and is configured such that it actuates the same.

3. The heat storage system according to claim 1, wherein the heat storage system is configured such that it is operable in a first operating mode in which sensible heat of the latent heat storage medium is utilized, and that it is operable in a second operating mode in which heat of fusion of the latent heat storage medium is utilized.

4. The heat storage system according to claim 1, wherein several or all of the storage tanks can be actuated individually via valves.

5. The heat storage system according to claim 3, wherein the choice of each operating mode is effected automatically and/or each operating mode can be chosen independently.

6. The heat storage system according to claim 1, wherein the heat storage system includes one or more heat circuits or is connected with the same, via which heat from the one or more storage tanks can be supplied to one or more heat consumers.

7. The heat storage system according to claim 1, wherein the heat storage system includes at least one heat circuit or is connected with at least one heat circuit, in which at least one heat exchanger is provided for heating service water.

8. The heat storage system according to claim 1, wherein the heat storage system includes at least one heat circuit or is connected with at least one heat circuit which serves as heating circuit.

9. The heat storage system according to claim 1, wherein the control unit is connected with at least one sensor which emits a signal representative for the heat requirement of at least one consumption point, and that in dependence on the at least one sensor signal the control unit actuates the one or more valves of the conduit system of the storage tanks.

10. The heat storage system according to, claim 3, such that when in the first and/or second operating mode at least one storage tank is switched in when the amount of sensible heat or of latent heat of the storage tanks already switched in is not sufficient.

11. The heat storage system according to claim 3, wherein switching over from the first operating mode into the second operating mode is effected when the sensible heat of the latent heat storage medium is exhausted and/or that the control unit is configured such that when supplying heat into the storage tanks, it initially supplies heat to the one or more storage tanks with the smallest or a relatively small heat content, and after loading the same switches over to at least one further storage tank, so that heat is supplied to the at least one further storage tank.

12. The heat storage system according to claim 1, wherein the storage tank has a width or depth or a diameter<

50 cm.

13. The heat storage system according to claim 1, wherein the latent heat storage medium is configured such that it crystallizes upon removal of heat.

14. The heat storage system according to claim 1, wherein the heat storage system includes a heat source.

15. A building or a mobile unit, such as a travel trailer, motor vehicle and the like with at least one heat storage system according to claim 1.

16. The heat storage system according to claim 12, wherein the width or depth or diameter ranges from 5 cm to 15 cm.

17. The heat storage system according to claim 14, wherein the heat source is a solar system comprising a burner for burning wood, wood pellets, oil or gas.

2. A heat storage system comprising one or more storage tanks in which a latent heat storage medium is disposed, wherein the heat storage system is configured such that it is operable in a first operating mode in which sensible heat of the latent heat storage medium is utilized, and that it is operable in a second operating mode in which heat of fusion of the latent heat storage medium is utilized.

18. The heat storage system according to claim 2, wherein several or all of the storage tanks can be actuated individually via valves.

19. The heat storage system according to claim 2, wherein the choice of each operating mode is effected automatically and/or each operating mode can be chosen independently.

20. The heat storage system according to claim 2, wherein the heat storage system includes one or more heat circuits or is connected with the same, via which heat from the one or more storage tanks can be supplied to one or more heat consumers.

21. The heat storage system according to claim 2, wherein the heat storage system includes at least one heat circuit or is connected with at least one heat circuit, in which at least one heat exchanger is provided for heating service water.

22. The heat storage system according to claim 2, wherein the heat storage system includes at least one heat circuit or is connected with at least one heat circuit which serves as heating circuit.

23. The heat storage system according to claim 2, wherein the control unit is connected with at least one sensor which emits a signal representative for the heat requirement of at least one consumption point, and that in dependence on the at least one sensor signal the control unit actuates the one or more valves of the conduit system of the storage tanks.

24. The heat storage system according to claim 2, such that when in the first and/or second operating mode, at least one storage tank is switched in when the amount of sensible heat or of latent heat of the storage tanks already switched in is not sufficient.

25. The heat storage system according to claim 2, wherein switching over from the first into the second operating mode is effected when the sensible heat of the latent heat storage medium is exhausted and/or that the control unit is configured such that when supplying heat into the storage tanks, it initially supplies heat to the one or more storage tanks with the smallest or a relatively small heat content, and after loading the same switches over to at least one further storage tank, so that heat is supplied to the at least one further storage tank.

26. The heat storage system according to claim 2, wherein the storage tank has a width or depth or a diameter<

50 cm

27. The heat storage system according to claim 26 wherein the width, depth or diameter is ranges from 5 cm to 15 cm.

28. The heat storage system according to claim 2, wherein the latent heat storage medium is configured such that it crystallizes upon removal of heat.

29. The heat storage system according to claim 2, wherein the heat storage system includes a heat source.

30. The heat storage system according to claim 29, wherein the heat source is a solar system comprising a burner for burning wood, wood pellets, oil or gas.

31. A building or a mobile unit, such as a travel trailer, motor vehicle and the like with at least one heat storage system according to claim 2.