TRANSPARENT SOLAR-HEAT COLLECTING APPARATUS, SOLAR WATER HEATING SYSTEM, AND SOLAR COGENERATION SYSTEM

• US 20160065125A1
• Filed: 08/25/2015
• Published: 03/03/2016
• Est. Priority Date: 08/29/2014
• Status: Active Grant

• Current Assignee: Ricoh Company Limited
• Original Assignee: Hiroshi Kondo
• Inventors: KONDO, Hiroshi
• Granted Patent: US 9,780,724 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F24D 3/005 combined with solar energy solar heat collectors per se F24S
• CPC Class Codes: F24S 10/50 the working fluids being conveyed between plates
• CPC Class Codes: F24S 20/62 in the form of fences, balustrades or handrails
• CPC Class Codes: F24S 20/67 in the form of roof constructions in the form of shingles or tiles F24S20/69
• CPC Class Codes: F24S 2080/502 in the form of multiple covering elements
• CPC Class Codes: F24S 60/30 storing heat in liquids
• CPC Class Codes: G02B 5/00 Optical elements other than lenses light guides G02B6/00; optical logic elements G02F3/00
• CPC Class Codes: G02B 5/208 for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
• CPC Class Codes: G02B 5/22 Absorbing filters G02B5/201 - G02B5/208 take precedence
• CPC Class Codes: G02B 5/223 containing organic substances, e.g. dyes, inks or pigments
• CPC Class Codes: H02S 40/44 Means to utilise heat energy, e.g. hybrid systems producing warm water and electricity at the same time directly associated with the PV cell or integrated with the PV cell H01L31/0525
• CPC Class Codes: Y02B 10/20 Solar thermal
• CPC Class Codes: Y02E 10/44 Heat exchange systems
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy
• CPC Class Codes: Y02E 10/60 Thermal-PV hybrids

Abstract

A transparent solar heat absorbing apparatus includes a transparent member allowing sunlight to pass through, a wavelength selective member disposed beneath the transparent member, a heating tank formed between the transparent member and the wavelength selective member. The wavelength selective member allows light in a transmission range including at least a visible wavelength range to pass through and reflects light in a reflection range including at least an infrared wavelength range. At least one of the transparent member and the wavelength selective member has a waveform structure on at least one of its upper surface and bottom surface.

Claims

1. A transparent solar heat absorbing apparatus comprising:

a transparent member that allows sunlight to pass through;

a wavelength selective member disposed beneath the transparent member, the wavelength selective member allowing light in a transmission range including at least a visible wavelength range to pass through and reflecting light in a reflection range including at least an infrared wavelength range; and

a heating tank formed between the transparent member and the wavelength selective member, the heating tank being filled with a heating medium,

wherein at least one of the transparent member and the wavelength selective member has a waveform structure on at least one of its upper surface and bottom surface.

2. The apparatus as claimed in claim 1, wherein the transparent member has the waveform structure on at least one of the upper surface and the bottom surface of the transparent member in a first cross sectional view, and a pseudo traveling direction of the waveform structure of the transparent member is a first direction, and

wherein the wavelength selective member has the waveform structure on at least one of the upper surface and the bottom surface of the wavelength selective member in a second cross sectional view, and a pseudo traveling direction of the waveform structure of the wavelength selective member faces to a second direction substantially orthogonal to the first direction.

3. The apparatus as claimed in claim 2, wherein the transparent member has the waveform structures on both the upper surface and the bottom surface of the transparent member.

4. The apparatus as claimed in claim 3, wherein the transparent member is formed by folding a flat plate member that allows the sunlight to pass through.

5. The apparatus as claimed in claim 2, wherein the first direction of the transparent member is oriented to a south-and-north direction, and

wherein the second direction of the wavelength selective member is oriented to an east-and-west direction.

6. The apparatus as claimed in claim 1, wherein the wavelength selective member is formed by covering a material that allows the sunlight to pass through with a dielectric multilayer film.

7. The apparatus as claimed in claim 1, wherein the wavelength selective member is formed by covering a material that allows the sunlight to pass through with a coating film of silver iodide tabular grains.

8. The apparatus as claimed in claim 1, wherein the heating medium is water or fluid containing water.

9. The apparatus as claimed in claim 1, wherein the transmission range of the wavelength selective member is set to be the visible wavelength range, and the reflection range of the wavelength selective member has a greater wavelength range than the transmission range.

10. The apparatus as claimed in claim 1, further including a photoelectric converter that is disposed beneath the wavelength selective member, the photoelectric converter receiving the sunlight by a light receiving surface and converting the received sunlight into electric energy,

wherein the transmission range of the wavelength selective member is set to be a wavelength range in which the photoelectric converter converts the sunlight into the electric energy, and the reflection range of the wavelength selective member has a greater wavelength range than the transmission range.

11. A solar water heating system comprising:

the transparent solar heat absorbing apparatus as claimed in claim 9;

a heat exchanger that is connected with the heating tank of the apparatus and receives the heating medium from the heating tank;

a water tank that accommodates the heat exchanger and stores water; and

a water heater that supplies hot water by heating the water stored in the water tank.

12. A solar cogeneration system comprising:

the transparent solar heat absorbing apparatus including the photoelectric converter as claimed in claim 10;

a heat exchanger that is connected with the heating tank of the apparatus, the heating medium being sent to the heat exchanger from the heating tank;

a water tank that accommodates the heat exchanger and stores water; and

a water heater that supplies hot water by heating the water stored in the water tank.

13. A solar water heating system, comprising:

the transparent solar heat absorbing apparatus as claimed in claim 9;

a heating medium tank that is connected with the heating tank, the heating medium tank storing the heating medium sent from the heating tank;

a heat exchanger that is connected with the heating medium tank, the heating medium being sent to the heat exchanger from the heating medium tank;

a heat-exchange tank that accommodates the heat exchanger and allows water to flow inside the heat-exchange tank; and

a heating medium transfer pump that adjusts a flow rate of the heating medium sent to the heat exchanger,

wherein the heating medium transfer pump adjusts the flow rate based on temperature and a flow rate of water supplied to the heat-exchange tank to increase the temperature of the water outputted from the heat-exchange tank to a target temperature.

14. A solar water heating system, comprising:

a solar heat absorbing apparatus that absorbs solar heat and heats a heating medium;

a heating medium tank that is connected with the heating tank, the heating medium tank storing the heating medium sent from the heating tank;

a heat exchanger that is connected with the heating medium tank, the heating medium being sent to the heat exchanger from the heating medium tank;

a heat-exchange tank that accommodates the heat exchanger and allows water to flow inside the heat-exchange tank; and

a heating medium transfer pump that adjusts a flow rate of the heating medium sent to the heat exchanger,

wherein the heating medium transfer pump adjusts the flow rate of the heating medium based on temperature and a flow rate of the water supplied to the heat-exchange tank to increase the temperature of the water outputted from the heat-exchange tank to a target temperature.