# US 2013/0152916 A1 · Cross linear type solar heat collecting apparatus

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2013/0152916 A1
- Document ID: US20130152916A1
- Status: Published application
- Kind: A1
- Application number: 13/819,117
- Filed: 2011-09-29
- Published: 2013-06-20
- Earliest claimed: 2010-10-01
- Assignees: Tokyo Institute of Technology
- Inventors: Yutaka Tamaura
- Web page: https://patentgrep.com/patent/US20130152916A1

## CPC

- F24S 50/20: for tracking
- F24S 10/25: having two or more passages for the same working fluid layered in direction of solar-rays, e.g. having upper circulation channels connected with lower circulation channels
- F24S 20/20: Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
- F24S 23/77: with flat reflective plates
- F24S 25/50: comprising elongate non-rigid elements, e.g. straps, wires or ropes
- F24S 30/425: Horizontal axis
- G02B 7/183: specially adapted for very large mirrors, e.g. for astronomy, {or solar concentrators}
- F24S 2020/16: {Preventing shading effects}
- F24S 2023/872: {Assemblies of spaced reflective elements on common support, e.g. Fresnel reflectors}
- Y02E 10/40: Solar thermal energy, e.g. solar towers
- Y02E 10/44: Heat exchange systems
- Y02E 10/47: Mountings or tracking
- F24S: SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS (for producing mechanical power from solar energy F03G6/00)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

It is to heighten the heat collecting efficiency of a linear type solar heat collecting apparatus. A plurality of reflection lines and one reception line are included. The reflection lines are arranged in parallel substantially in the south-north direction on earth. Each reflection line L1, L2, . . . has a heliostat 1. The heliostat 1 is composed of a plurality of mirror segments disposed in series on each reflection line L1, L2, . . . . The reception line C extends in the east-west direction perpendicular to the reflection lines L1, L2, . . . , and is disposed at a predetermined position above the reflection lines L1, L2, . . . The reception line C has a single receiver. The mirror segments disposed on each reflection line L1, L2, . . . radiate reflected light of sunlight that has impinged on the mirror surface toward the reception line C. The receiver 2 disposed on the reception line C collects the heat of the reflected light of sunlight radiated from the mirror segments disposed on each reflection line.

## Claims

### Claim 1

A cross linear type solar heat collecting apparatus comprising a plurality of reflection lines and one reception line;
the plurality of reflection lines being arranged in parallel in a south-north direction on earth;
each of the plurality of reflection lines being provided with a heliostat composed of a plurality of mirror segments;
the reception line extending in an east-west direction that perpendicularly intersects the plurality of reflection lines and being disposed above the plurality of reflection lines;
the reception line being provided with a single receiver;
reflected light of sunlight that has impinged on each mirror segment of the heliostat of the reflection line being radiated toward the reception line while allowing the mirror segment to undergo angle adjustment; and
the receiver of the reception line collecting heat of the reflected light of the sunlight radiated from the heliostat.

### Claim 2 (depends on 1)

The cross linear type solar heat collecting apparatus according to claim 1, wherein the receiver of the reception line has a heat collecting pipe in which a heat medium is contained, and
the heat collecting pipe is divided into an irradiation range that is irradiated with light reflected from the mirror segment of the reflection line and a non-irradiation range secured at both ends of the irradiation range.

### Claim 3 (depends on 2)

The cross linear type solar heat collecting apparatus according to claim 2, wherein the irradiation range is a range that transfers heat from the irradiation range to the non-irradiation range by being heated by reflected light of sunlight and that allows the heat medium contained in the heat collecting pipe to make a heat transfer.

### Claim 4 (depends on 1)

The cross linear type solar heat collecting apparatus according to claim 1, wherein the mirror segment placed on each reflection line is capable of undergoing adjustment to a turning angle in the south-north direction and in the east-west direction.

### Claim 5 (depends on 1)

The cross linear type solar heat collecting apparatus according to claim 1, wherein the mirror segments placed on each reflection line are arranged to be aligned in a row-wise direction (south-north direction) and are capable of undergoing adjustment to a turning angle in the east-west direction and in the south-north direction, and
rotation angles of the mirror segments in a column-wise direction (east-west direction) on the reflection lines are adjusted together as a group, whereas rotation angles of the mirror segments arranged in the row-wise direction are adjusted individually.

### Claim 6 (depends on 1)

The cross linear type solar heat collecting apparatus according to claim 1, wherein the mirror segment is set as a typical module in which a length in a row-wise direction (south-north direction) is twice as long as a length in a column-wise direction (east-west direction), and
several mirror segments arranged in series are set as one group, and are arranged so that one group faces one other group with respect to a position of the reception line placed between the one group and the one other group on each reflection line.

### Claim 7 (depends on 1)

The cross linear type solar heat collecting apparatus according to claim 1, wherein an interval between the mirror segments that adjoin each other in a row-wise direction (south-north direction) is set to be smaller on a side closer to the reception line, and is set to become greater in proportion to an increase in distance from the reception line so as to reduce optical loss caused by blocking and by shadowing between the adjoining mirror segments.

### Claim 8 (depends on 1)

The cross linear type solar heat collecting apparatus according to claim 1, wherein, when a linear type solar heat collecting apparatus is installed in the Northern Hemisphere, a length of the reflection line is set so that a northern reflection line on a northern side is longer than a southern reflection line on a southern side with the reception line extending in the east-west direction as a boundary line between the northern side and the southern side, and
when the linear type solar heat collecting apparatus is installed in the Southern Hemisphere, the length of the reflection line is set so that a southern reflection line on a southern side is longer than a northern reflection line on a northern side with the reception line extending in the east-west direction as a boundary line therebetween.

### Claim 9 (depends on 1)

The cross linear type solar heat collecting apparatus according to claim 1, wherein the single receiver has a heat collecting pipe whose inside is filled with a heat medium, and is disposed above all lines of the heliostats in such a manner as to extend like a bridge across the lines, and has its one end connected to a heat supply source; and
the heat collecting pipe receives light reflected from the heliostat, and collects heat of the heat medium heated to a high temperature.

### Claim 10 (depends on 1)

The cross linear type solar heat collecting apparatus according to claim 1, wherein the single receiver has several heat collecting pipes arranged in parallel;
a space above rows of the heat collecting pipes is covered with a heat-insulating outer wall;
a heat-absorbing net that has a cavity window function is placed directly under the rows of the heat collecting pipes;
the heat-insulating outer wall is a cross-sectionally circular-arc cover, and contains a group of the heat collecting pipes arranged in parallel;
both edges of the heat-insulating outer wall project downwardly from edges of the heat-absorbing net;
the heat-absorbing net is a stainless mesh that has a parallel-crosses structure having a predetermined thickness or that has a honeycomb structure; and
light reflected from the heliostat passes through a mesh wall and travels inwardly, and, however, its radiation light does not easily come out from inside the mesh wall.

### Claim 11 (depends on 1)

A solar heat collecting apparatus formed by combining a preheating means and a principal-heating means together, wherein the preheating means is a means for heating to a first temperature that is lower than a target temperature by use of the cross linear type solar heat collecting apparatus defined in claim 1 as a relay, whereas the principal-heating means is a means for raising temperature to a second temperature that is the target temperature by use of another type of solar heat collecting apparatus that is more suitable for high-temperature light collection than the cross linear type solar heat collecting apparatus.