Solar Light (Heat) Absorption Material and Heat Absorption/Accumulation Material and Solar Light (Heat) Absorption/Control Building Component Using the Same

• US 20120017622A1
• Filed: 03/05/2010
• Published: 01/26/2012
• Est. Priority Date: 03/06/2009
• Status: Abandoned Application

• Current Assignee: Osaka Gas Company Limited, University of The Ryukyus
• Original Assignee: Osaka Gas Company Limited, University of The Ryukyus
• Inventors: Kondo, Yoshikazu, Ueno, Masami, Kawamitsu, Yoshinobu, Tsutsumi, Junichiro
• Application Number:
  US13/254,345
• Publication Number:
  US 20120017622A1
• Time in Patent Office: Days
• US Class Current: 62/235.1
• CPC Class Codes: C09K 5/10 Liquid materials
• CPC Class Codes: F24S 20/60 Solar heat collectors integrated in fixed constructions, e.g. in buildings
• CPC Class Codes: F24S 20/69 in the form of shingles or tiles
• CPC Class Codes: F24S 50/80 for controlling collection or absorption of solar radiation
• CPC Class Codes: F24S 60/00 Arrangements for storing heat collected by solar heat collectors working fluids forming pools or ponds F24S10/10
• CPC Class Codes: F24S 70/10 characterised by the absorbing material absorbing coatings or surface treatment for increasing absorption F24S70/20
• CPC Class Codes: F24S 80/20 Working fluids specially adapted for solar heat collectors
• CPC Class Codes: Y02A 30/272 Solar heating or cooling
• CPC Class Codes: Y02B 10/20 Solar thermal
• CPC Class Codes: Y02E 10/44 Heat exchange systems
• CPC Class Codes: Y02E 10/46 Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines

Abstract

A solar light (heat) absorption material is provided which has an excellent solar light (heat) absorbing ability and a simple structure, and may be usable as a low-cost and high-performance heat absorption/accumulation material, the inventive material being usable also as a solar light (heat) absorption/control building component that allows easy change of its solar light (heat) absorption/control ability. The material comprises particles dispersed into a liquid medium having a specific heat ranging from 0.4 to 1.4 cal/g/° C. and a melting point of 5° C. or lower. The dispersed particles have L*value of 30 or less as determined by the CIE-Lab color system (light source D65).

Claims

1. A solar light (heat) absorption material comprising particles, which have L*value of 30 or less as determined by CIE-Lab color system (light source D65), dispersed into a liquid medium having a specific heat ranging from 0.4 to 1.4 cal/g/°

C. and a melting point of 5°

C. or lower.

2. The solar light (heat) absorption material according to claim 1, wherein said medium is selected from the group consisting of water, aliphatic mono alcohol, aliphatic di-alcohol, and hydrocarbon.

3. The solar light (heat) absorption material according to claim 2, wherein said aliphatic mono alcohol is selected from the group consisting of ethyl alcohol, propyl alcohol, butyl alcohol, amyl alcohol, and hexane alcohol.

4. The solar light (heat) absorption material according to claim 2, wherein said aliphatic di-alcohol is selected from the group consisting of ethylene glycol, propylene glycol, polyethylene glycol, and polypropylene glycol.

5. The solar light (heat) absorption material according to claim 2, wherein said hydrocarbon is selected from the group consisting of paraffin, benzene, xylene, and chlorobenzene.

6. The solar light (heat) absorption material according to claim 1, wherein said particles comprise carbonized materials of biomass.

7. The solar light (heat) absorption material according to claim 6, wherein said carbonized materials of biomass has micropores.

8. The solar light (heat) absorption material according to claim 6, wherein said biomass comprises bagasse.

9. The solar light (heat) absorption material according to claim 1, wherein said particles have a particle diameter of 3 mm or less.

10. The solar light (heat) absorption material according to claim 1, wherein the material comprises, in said medium, a substance having a phase transition temperature in the temperature range from 50 to 120°

C., with this substance being out of direct contact with the medium.

11. A heat absorption/accumulation material comprising the solar light (heat) absorption material according to claim 1.

12. A heat absorption/accumulation structure having the heat absorption/accumulation material of claim 11 filled in a container having an opening thereof covered with a light transmitting body.

13. The heat absorption/accumulation structure according to claim 12, wherein a layer of heat absorption/accumulation material has a thickness for achieving light transmittance of 10% or less for light of 550 nm.

14. The heat absorption/accumulation structure according to claim 12, wherein the heat absorption/accumulation structure is configured to absorb/accumulate solar heat.

15. A solar water heater comprising the heat absorption/accumulation structure according to claim 12, wherein a medium for the heat absorption/accumulation material filled in said heat absorption/accumulation structure comprises water.

16. A cooling system using heat accumulated in the heat absorption/accumulation structure according to claim 12 as a heat source for an absorption refrigerator or an adsorption refrigerator.

17. A power generating system using heat accumulated in the heat absorption/accumulation structure according to claim 12 as a heat source for a temperature-difference power generation.

18. A solar light (heat) absorption/accumulation building component comprising a hollow portion and an amount of the solar light (heat) absorption material according to claim 1 filled in the hollow portion of a plate-like body having an upper face and a lower face at least one of which has light transmission characteristics.

19. The solar light (heat) absorption/accumulation building component according to claim 18, wherein the solar light (heat) absorption material is circulated to/from an external instrument.

20. The solar light (heat) absorption/accumulation building component according to claim 18, further comprising a detecting means for detecting a outside condition and an adjusting means for adjusting the light absorbance of the solar light (heat) absorption material according to the outside condition.

21. The solar light (heat) absorption/accumulation building component according to claim 20, wherein said outside condition comprises lightness and/or temperature.

22. The solar light (heat) absorption/accumulation building component according to claim 18, further comprising a converting means for covering the solar heat absorbed by the solar light (heat) absorption material into hot water/air or cool water/air.

23. The solar light (heat) absorption/accumulation building component according to claim 18, wherein said component comprises a windowpane, a roof tile or a roofing material.

24. An agricultural/horticultural facility using said solar light (heat) absorption/control building component according to claim 18 in its wall and/or ceiling.

25. A house/building using said solar light (heat) absorption/control building component according to claim 18 in at least a part of its wall, window, roof or roof top.