Temperature regulating system

• US 5,070,933 A
• Filed: 01/22/1991
• Issued: 12/10/1991
• Est. Priority Date: 01/22/1991
• Status: Expired due to Term

• Current Assignee: Zomeworks
• Original Assignee: Zomeworks
• Inventors: Baer, Stephen C.
• Primary Examiner(s): DAVIS JR, ALBERT
• Application Number:
  US07/644,165
• Time in Patent Office: 322 Days
• Field of Search: 165/32, 165/104.19, 165/56, 165/904, 62/467
• US Class Current: 165/276
• CPC Class Codes: F24F 5/0017 using cold storage bodies, e.g. ice
• CPC Class Codes: F24F 5/0089 Systems using radiation from walls or panels
• CPC Class Codes: F24F 5/0092 ceilings, e.g. cool ceilings
• CPC Class Codes: F25D 23/06 Walls F25D23/08 takes precedence; containers with thermal insulation B65D81/38
• CPC Class Codes: F25D 2303/0822 Details of the element
• CPC Class Codes: F25D 2303/08222 Shape of the element
• CPC Class Codes: F25D 9/00 Devices not associated with refrigerating machinery and not covered by groups F25D1/00 - F25D7/00; Combinations of devices covered by two or more of the groups F25D1/00 - F25D7/00
• CPC Class Codes: F28D 20/0034 using liquid heat storage material
• CPC Class Codes: Y02E 60/14 Thermal energy storage
• CPC Class Codes: Y10S 165/904 Radiation

Abstract

A temperature regulating system that includes an enclosure having at least one temperature regulator including a container coupled to the ceiling of the enclosure and having an upper wall, a lower wall and an intermediate section that form a chamber which houses insulation and is filled with water provides a cooling system independent of external power. The insulation is positioned adjacent to the upper wall of the container and includes an upper surface facing the container'"'"'s upper wall. The area of the upper surface of the insulation is approximately equal to the effective heat transfer area of the interior surface of the container. The insulation forms passages that provide fluid flow communication between the upper and lower walls of the container. With this construction relatively cold water, chilled by cool surroundings, e.g., the night atmosphere, flows downwardly from the region adjacent to the upper wall of the container to below the insulation and toward the lower wall of the container, cools the interior space of the enclosure by heat transfer. Relatively warm water flows upwardly from the region adjacent to the lower wall of the container, above the insulation and toward the upper wall of the container. The thermal characteristics of the insulation and water minimize the penetration of heat from outside during the day.

Claims

1. A temperature regulator comprising:

a container having an inner chamber and an upper wall adapted to be in thermal contact with the underside of the roof of a structure;

a supply of water filling said chamber, said water being in contact with essentially the entire effective heat transfer area of said upper wall; and

insulation disposed in said chamber and located adjacent to said upper wall, said insulation defining passages that allow the water to flow vertically through the insulation,

whereby the radiation of heat from the roof into the night sky cools the water above the insulation and the remainder of the water is cooled by convection as relatively warmer water below the insulation circulates upwardly through the insulation and cooler water above the insulation circulates downwardly, and heat transfer to the interior of the structure is minimized during the day by the insulation and the thermal mass of the water.

2. The regulator of claim 1 wherein said container further includes a port for filling said container with said water.

3. The regulator of claim 2 wherein said port comprises a tubular section that extends outwardly from said upper wall such that gas bubbles can be entrapped therein and maintained away from the region between said insulation and said

4. The regulator of claim 1 wherein the upper wall of the container is inclined relative to horizontal so that the water is in contact with the upper wall throughout most of the heat transfer area of the upper wall.

5. The regulator of claim 1 wherein said insulation floats in said water such that said water suspends said insulation in close proximity to said upper wall of said container.

6. The regulator of claim 5 wherein said insulation comprises spheres of a heat insulative material.

7. The regulator of claim 6 wherein said spheres have an outer diameter of at least one inch.

8. The regulator of claim 6 wherein said spheres are foamed plastic.

9. The regulator of claim 6 wherein said spheres are hollow.

10. The regulator of claim 1 wherein said insulation comprises a sheet of foamed plastic having a top surface in close proximity to the upper wall of the container.

11. The regulator of claim 10 wherein said sheet of foamed plastic includes a plurality of projections that extend from said top surface and space the top surface of the sheet of foamed plastic from said upper wall of said container.

12. The regulator of claim 10 wherein said passages comprise a plurality of vertical passages extending the entire thickness of said sheet to allow the water to flow between the area above said insulation and the area below said insulation.

13. The regulator of claim 12 wherein said passages comprise a plurality of holes that are formed through said insulation.

14. The regulator of claim 12 wherein said sheet includes a plurality of projections that extend from its perimetrical side surface and space said sheet from said intermediate section of said container, said vertical passages comprising slots formed between said projections.

15. The regulator of claim 12 wherein the sum of the cross-sectional areas of said vertical passages is about four percent of the area defined by said top surface.

16. The regulator of claim 1 wherein the container includes sidewalls of a material which does not readily conduct heat to inhibit heat transfer vertically through the sidewalls of the container.

17. A passively cooled structure comprising:

an enclosure including a roof having an interior surface that defines the upper boundary of an interior space; and

at least one temperature regulator positioned in said enclosure, each said temperature regulator including;

roof;

a container having an upper wall and an interior forming a chamber located beneath the interior surface of the

means for maintaining said upper wall of said container in thermal contact with the interior surface of the roof;

a supply of water substantially filling said chamber; and

insulation disposed in said chamber and positioned adjacent said upper wall, said insulation including a top surface facing the interior surface of said upper wall, the area of said top surface being approximately equal to the effective heat transfer area of the interior surface of said upper wall, said insulation defining passages that provide fluid flow vertically through said insulation,

whereby the radiation of heat from the roof into the night sky cools the water above the insulation and the remainder of the water is cooled by convection as relatively warmer water below the insulation circulates upwardly through the insulation and cooler water above the insulation circulates downwardly, heat transfer to the interior of the structure is minimized during the day by the insulation and the thermal mass of the water.

18. The system of claim 17 wherein the roof and the upper wall of said container are oriented at angle with respect to horizontal such that said container has an upper and lower corner, whereby gas trapped in said container rises to said upper corner of said container.

19. The system of claim 17 wherein said insulation comprises spheres of heat insulative material that are less dense than said water to the extent that they float in said water and are suspended in close proximity to the upper wall of the container.

20. The system of claim 17 wherein said insulation comprises a sheet of heat insulative material.

21. The system of claim 20 wherein said insulation floats in said water such that it is in close proximity to said upper wall of said container.

22. The system of claim 21 wherein said sheet of insulation includes a plurality of projections that extend from said top surface of said insulation toward said upper wall of said container and maintain said top surface of said floating insulation spaced from said upper wall of said container.

23. The system of claim 20 wherein said passages comprise a plurality of holes extending through the entire thickness of said sheet.

24. The system of claim 20 wherein at least a portion of the perimetrical side surface of said sheet of insulation is spaced from said intermediate section of said container.

25. The system of claim 17 wherein the upper surface of the roof is highly emissive to heat radiation.

26. The regulator of claim 17 wherein the container includes sidewalls of material which does not readily conduct heat to inhibit heat transfer vertically through the sidewalls of the container.

27. A temperature regulating system comprising:

an enclosure including a roof having an inner surface that defines the upper boundary of an interior space, said enclosure having an emissive outer surface exposed to the atmosphere; and

a plurality of temperature regulators disposed in said enclosure, each said temperature regulator including a container having an upper wall, a lower wall and an intermediate section, said upper wall, lower wall and intermediate section having interior surfaces forming a chamber, at least the intermediate section being constructed of a material which is a poor conductor of heat, and water substantially filling said chamber and being in contact with essentially the entire effective heat transfer area of said interior surface of said upper wall of said container;

means for maintaining the upper walls of the containers in thermal contact with the interior surface of the roof;

insulation disposed in each said chamber, positioned in close proximity to each said upper wall and dividing said chambers into an upper and a lower spaces, said insulation including an upper surface facing said upper wall, the area of said upper surface being approximately equal to the effective heat transfer area of the interior surface of said upper wall, said insulation defining passages that provide fluid flow communication between said upper and lower walls of said container,

whereby the radiation of heat from the roof into the night sky cools the water above the insulation and the water is cooled by convection as relatively warmer water below the insulation circulates upwardly through the insulation and colder water above the insulation circulates downwardly, and heat transfer to the interior of the structure is minimized during the day by the insulation and the thermal mass of the water.

28. The system of claim 27 wherein said insulation floats in said water with a buoyancy that maintains said insulation adjacent to said ceiling.

29. The system of claim 27 wherein the roof and the upper wall of said container are oriented at an angle with respect to horizontal such that said container has an upper and lower corner, whereby gas trapped in said container rises to said upper corner of said container.

30. The system of claim 27 wherein the upper surface of the roof is highly emissive to heat radiation.