Heat or thermal energy storage structure

• US 4,003,426 A
• Filed: 05/08/1975
• Issued: 01/18/1977
• Est. Priority Date: 05/08/1975
• Status: Expired due to Term

• Current Assignee: The Dow Chemical Company (Dow, Inc.)
• Original Assignee: The Dow Chemical Company (Dow, Inc.)
• Inventors: McMillan, William J., Best, John S.
• Primary Examiner(s): Freeh, William L.
• Assistant Examiner(s): LaPointe, G. P.
• Application Number:
  US05/575,558
• Time in Patent Office: 621 Days
• Field of Search: 165/104 S, 165/53, 252/67, 126/400
• US Class Current: 165/53
• CPC Class Codes: C09K 5/063 Materials absorbing or liberating heat during crystallisation; Heat storage materials
• CPC Class Codes: F28D 20/023 the latent heat storage material being enclosed in granular particles or dispersed in a porous, fibrous or cellular structure
• CPC Class Codes: Y02E 60/14 Thermal energy storage

Abstract

A heat or thermal energy storage structure comprising a crosslinked polymeric resinous matrix having a plurality of substantially unconnected small closed cavities and a heat sink material encapsulated within the cavities. The structure is characterized in that the heat sink material forms an essentially stable dispersion in the uncured polymeric resinous matrix when mixed therewith before the matrix is crosslinked. The structure can beneficially be used in conjunction with low level heat or thermal energy collector means and heat transfer means to provide a space heating or cooling apparatus. The storage structure may also be effectively used to provide an additional function of a building component in a building construction such as a wall structure.

Claims

1. A heat or thermal energy storage structure comprising a crosslinked polymeric resinous matrix having a plurality of substantially unconnected small closed cavities disposed therein and a heat sink material encapsulated within said cavities, said heat sink material having a relatively large latent heat capacity at its melting and freezing phase change which supplies heat to or removes heat from said storage structure.

2. The structure of claim 1 wherein said crosslinked polymeric resinous matrix is selected from the group consisting essentially of polyesters, polyvinyl esters and epoxies.

3. The structure of claim 1 wherein said heat sink material forms an essentially stable dispersion in the uncured polymeric resinous matrix when mixed therewith before said matrix is crosslinked.

4. The structure of claim 1 wherein said heat sink material has a melting and freezing phase change temperature of from about 5°

C to about 100°

C.

5. The structure of claim 1 wherein said heat sink material in the liquid phase supercools to less than about 5°

C below its melting and freezing phase change temperature.

6. The structure of claim 1 wherein said structure is enveloped in a gas or vapor barrier material.

7. An apparatus for space heating or cooling comprising a low level heat or thermal energy collector means, a heat or thermal energy storage structure and heat or thermal energy transfer means, said storage structure comprising a crosslinked polymeric resinous matrix having a plurality of substantially unconnected small cavities disposed in said matrix with a heat sink material encapsulated within said cavities, said heat sink material having a relatively large latent heat capacity at its melting and freezing phase change which supplies heat to or removes heat from said storage structure, said transfer means interconnecting said collector means, storage structure and a space the temperature of which is to be controlled whereby heat is transferred from said collector means to said storage structure and to said space when said space is being heated and from said space to said storage structure and to an alfresco environment when said space is being cooled.

8. The apparatus of claim 7 wherein said crosslinked polymeric resinous matrix is selected from the group consisting essentially of polyesters, polyvinyl esters and epoxies.

9. The apparatus of claim 7 wherein said heat sink material forms an essentially stable dispersion in the uncured polymeric resinous matrix when mixed therewith before said matrix is crosslinked.

10. The apparatus of claim 7 wherein said heat sink material has a melting and freezing phase change temperature of from about 5°

C to about 100°

C.

11. The apparatus of claim 7 wherein said heat sink material in the liquid phase supercools to less than about 5°

C below its melting and freezing phase change temperature.

12. The apparatus of claim 7 wherein said structure is enveloped in a gas or vapor barrier material.

13. The apparatus of claim 7 wherein said storage structure is a structural building component in a building construction.

14. The apparatus of claim 13 wherein said building component is at least one wall of a building.