JP2011220557A - Solar heat receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase heating efficiency by uniformly heating peripheral surfaces of heat transfer tubes.SOLUTION: A heat receiving surface 102 extended in a vertical plane is set in a casing 101 of a solar heat receiver 100 disposed at the top part of a tower 9. The heat transfer tubes running compressive working fluid are disposed within the plane of the heat receiving surface 102. Sunlight projected from a light-collector disposed on a mirror disposing surface 10a is captured in the casing 101 via a sunlight inlet 104a, and the peripheral surface of one side of a pipe is irradiated with the captured sunlight. Sunlight projected from a light-collector disposed on a mirror disposing surface 10b is captured in the casing 101 via a sunlight inlet 104b, and the peripheral surface of the other side of a pipe is irradiated with the captured sunlight. As a result, the whole periphery surface of the pipe is irradiated with the sunlight and uniformly heated.

Description

  The present invention relates to a solar heat receiver that heats a compressive working fluid passing through the inside of a heat transfer tube by heating with sunlight.

  As a solar heat receiver (solar heat collector) for heating a compressive working fluid passing through the inside of a heat transfer tube by heating with sunlight, for example, the one disclosed in Patent Document 1 is known. .

JP-A-2-52953

However, in the solar heat receiver (heat accumulator) 1 disclosed in FIG. 5 of Patent Document 1, a plurality of heat transfer tubes (heat transfer tubes with a heat storage material) 14 are arranged at the center of the sunlight inlet (opening) 15. It is arranged in a cylindrical shape around the passing central axis.
Therefore, among the peripheral surfaces of the heat transfer tubes, sunlight is directly applied to the peripheral surface on the central axis side, but sunlight is directly applied to the peripheral surface on the opposite side not facing the central axis side. Will not be irradiated.
As a result, there is a drawback that non-uniformity in heat input is likely to occur.
Furthermore, there is a drawback that a temperature difference occurs along the peripheral surface of the heat transfer tube, and the heat stress of the heat transfer tube becomes high.

  The present invention has been made in view of the above circumstances, and can improve the thermal efficiency by uniformly heating the peripheral surface of the heat transfer tube through which the compressive working fluid flows, and the thermal stress acting on the heat transfer tube can be improved. An object of the present invention is to provide a solar heat receiver that can be made uniform to extend the life of a heat transfer tube.

The configuration of the present invention for solving the above problems is as follows.
A casing formed with a solar light inlet that is arranged at the top of a tower erected on the ground and takes in sunlight that has been collected and projected by a light collector disposed on the ground, and
A plurality of heat transfer tubes disposed in the casing and heated by irradiation with sunlight taken into the casing;
A solar heat receiver with
In the casing, set a heat receiving surface extending in a vertical plane, arrange a plurality of the heat transfer tubes along the heat receiving surface,
Among the casing, the solar light entrance is formed at each position where the solar light projected from the light collector can be irradiated to one surface and the other surface of the heat receiving surface. It is characterized by that.

The configuration of the present invention is as follows.
A casing formed with a solar light inlet that is arranged at the top of a tower erected on the ground and takes in sunlight that has been collected and projected by a light collector disposed on the ground, and
A plurality of heat transfer tubes disposed in the casing and heated by irradiation with sunlight taken into the casing;
A solar heat receiver with
In the casing, a plurality of heat receiving surfaces spreading in a vertical plane, when viewed in plan, is set radially with the tower as a center, and a plurality of the heat transfer tubes are arranged along each heat receiving surface,
The solar light inlet is formed at each position where the solar light projected from the light collector can be irradiated to the opposing surfaces of the heat receiving surfaces adjacent to each other in the circumferential direction in the casing. It is characterized by.

The configuration of the present invention is as follows.
A casing formed with a solar light inlet that is arranged at the top of a tower erected on the ground and takes in sunlight that has been collected and projected by a light collector disposed on the ground, and
A plurality of heat transfer tubes disposed in the casing and heated by irradiation with sunlight taken into the casing;
A solar heat receiver with
In the casing, a plurality of heat receiving surfaces spreading in a vertical plane are set in a state where adjacent ones face each other while taking a mutual interval, and a plurality of the heat transfer tubes are arranged along each heat receiving surface,
The solar light inlet is formed at each position where the sunlight projected from the light collector can be irradiated to one surface and the other surface of the heat receiving surfaces of the casing. It is characterized by.

  According to the solar heat receiver according to the present invention, the compressive working fluid passing through the heat transfer tube can be heated uniformly, the heating efficiency can be improved, and the thermal stress acting on the heat transfer tube can be made uniform. Thus, the stress acting on the heat transfer tube can be reduced as a whole, and the life of the heat transfer tube can be extended.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic block diagram which shows the solar thermal dust turbine and solar thermal gas turbine power generator which comprised the solar thermal receiver which concerns on Example 1 of this invention. BRIEF DESCRIPTION OF THE DRAWINGS The block diagram for demonstrating the relationship between the solar heat receiver which concerns on Example 1 of this invention, and the mirror arrangement | positioning surface where the collector which condenses sunlight to this solar heat receiver is arrange | positioned. The block diagram for demonstrating the outline | summary of a collector. Schematic configuration diagram showing simplified arrangement of heat transfer tubes The block diagram for demonstrating the relationship between the solar heat receiver which concerns on Example 2 of this invention, and the mirror arrangement | positioning surface where the collector which condenses sunlight to this solar heat receiver is arrange | positioned. The block diagram for demonstrating the relationship between the solar heat receiver which concerns on Example 3 of this invention, and the mirror arrangement | positioning surface by which the collector which condenses sunlight to this solar heat receiver is arrange | positioned.

  Hereinafter, embodiments of the present invention will be described in detail based on examples.

A solar heat receiver according to Embodiment 1 of the present invention will be described with reference to FIGS.
FIG. 1 is a schematic configuration diagram showing a solar thermal dust turbine and a solar thermal gas turbine power generator equipped with a solar heat receiver according to the first embodiment. FIG. 2 is a solar heat receiver according to the first embodiment, and sunlight is applied to the solar heat receiver. FIG. 3 is a diagram for explaining the outline of the condenser, and FIG. 4 is a simplified illustration of the arrangement state of the heat transfer tubes. It is a schematic block diagram shown.

As shown in FIG. 1, a solar gas turbine 1 includes a compressor 2 that compresses and compresses a compressive working fluid (working fluid such as air), and heats the compressive working fluid with heat converted from sunlight. The apparatus is mainly composed of the solar heat receiver 100 according to the first embodiment for raising the temperature and the turbine 3 that converts thermal energy held by the high-temperature and high-pressure compressive working fluid into mechanical energy.
That is, the solar gas turbine 1 uses solar thermal energy to heat and heat the compressive working fluid instead of a combustor that burns fuel such as natural gas to generate high-temperature and high-pressure combustion gas. A heat receiver 100 is provided.

Moreover, if the generator 4 is connected coaxially with the solar thermal gas turbine 1 and the generator 4 is driven by the solar thermal gas turbine 1, the solar thermal gas turbine power generator 5 that generates power using sunlight is obtained.
The reheater 6 preheats the high-pressure compressive working fluid boosted by the compressor 2 using the exhaust heat of the compressive working fluid discharged from the chimney 7 to the atmosphere after working in the turbine 3. .

  The solar heat receiver 100 is a device for converting sunlight into heat energy, and as shown in FIG. 2, the top of the tower 9 standing on the ground 8 (for example, the tip of the tower 9 having a height of 100 m). ).

On the ground 8, mirror arrangement surfaces 10a and 10b are set. In this example, two mirror arrangement surfaces 10a and 10b are arranged with the tower 9 interposed therebetween.
On each mirror arrangement surface 10a, 10b, a plurality of collectors 11 (for example, 400) that reflect sunlight toward the solar heat receiver 100 are arranged (for example, 400).
Each concentrator 11 is a device that condenses light while efficiently reflecting sunlight, and the direction of the concentrator 11 is the sun so that the reflected and condensed sunlight is projected toward the solar heat receiver 100. It is to be controlled according to the movement of.

The casing 101 of the solar heat receiver 100 is disposed at the top of the tower 9, and a heat insulating material is applied to the inner wall surface of the casing 101 to form a heat insulating wall. In the internal space of the casing 101, a heat receiving surface 102 that extends in a vertical plane is set.
A plurality of (for example, 500) heat transfer tubes 103 are arranged along the heat receiving surface 102 as shown in a simplified manner in FIG. That is, a surface formed by arranging a plurality of heat transfer tubes 103 in a planar shape is a heat receiving surface 102. A compressive working fluid flows through each heat transfer tube 103.

Two sunlight inlets 104 a and 104 b are formed in the casing 101.
The sunlight entrance 104a takes in the sunlight reflected and condensed by the condenser 11 arranged on the mirror arrangement surface 10a into the casing 101 and receives one surface of the heat receiving surface 102 (the left surface in FIG. 1). ) To be irradiated.
The sunlight entrance 104b takes the sunlight reflected and projected by the condenser 11 arranged on the mirror arrangement surface 10b into the casing 101, and the other surface of the heat receiving surface 102 (the right surface in FIG. 1). ) To be irradiated.

  Therefore, one of the heat receiving surfaces 102, that is, of the peripheral surfaces of the plurality of heat transfer tubes 103 arranged along the heat receiving surface 102, the solar light taken in from the sunlight inlet 104a is formed on the half peripheral surface on the sunlight inlet 104a side. Is irradiated. At the same time, of the other surface of the heat receiving surface 102, that is, the peripheral surface of the plurality of heat transfer tubes 103 arranged along the heat receiving surface 102, sunlight taken in from the solar light inlet 104 b is placed on the half peripheral surface on the solar light inlet 104 b side. Is irradiated.

As a result, each heat transfer tube 103 is heated from the peripheral surface on one side and the peripheral surface on the other side, that is, both surfaces (all peripheral surfaces). Accordingly, the peripheral surface of the heat transfer tube through which the compressive working fluid flows can be heated uniformly, and the compressive working fluid can be effectively heated. Further, the thermal stress acting on the heat transfer tube 103 can be made uniform to reduce the stress acting on the heat transfer tube 103 as a whole, and the life of the heat transfer tube 103 is extended.
Further, since the heat transfer tubes 103 are arranged along one heat receiving surface 102, a simple tube arrangement structure is obtained, and the overall configuration can be simplified.

  According to the solar gas turbine 1 including the solar heat receiver 100 according to the first embodiment, the compressive working fluid that passes through the heat transfer tube is uniformly heated, and thus is sent from the solar heat receiver 100 to the turbine 3. Since the temperature of the compressive working fluid rises more than before, the turbine efficiency can be improved more than before.

  According to the solar thermal gas turbine power generation device 5, the solar thermal gas turbine 1 having better turbine efficiency than the conventional one is provided, and the power generation efficiency is higher than before, so that the energy recovery rate can be improved. , Its reliability can be improved.

A solar heat receiver 200 according to Embodiment 2 of the present invention will be described with reference to FIG.
The solar heat receiver 200 is a device for converting sunlight into heat energy, and as shown in FIG. 5, the top of the tower 9 erected on the ground 8 (for example, the tip of the tower 9 having a height of 200 m). ).

On the ground 8, mirror arrangement surfaces 10a, 10b, and 10c are set. In this example, three mirror arrangement surfaces 10a, 10b, and 10c are arranged at substantially equal intervals adjacent to each other in the circumferential direction on the circumference centered on the tower 9 when viewed in a plan view.
On each of the mirror arrangement surfaces 10a, 10b, and 10c, a plurality of condensers 11 (for example, 400) that reflect sunlight toward the solar heat receiver 200 are arranged (for example, 400).
Each concentrator 11 is a device that collects sunlight while efficiently reflecting sunlight, and the direction of the concentrator 11 is the sun so that the reflected and condensed sunlight is projected toward the solar heat receiver 200. It is to be controlled according to the movement of.

The casing 201 of the solar heat receiver 200 is disposed at the top of the tower 9, and a heat insulating material is applied to the inner wall surface of the casing 201 to form a heat insulating wall. In the internal space of the casing 201, three heat receiving surfaces 202a, 202b, and 202c that spread in a vertical plane are set. The three heat receiving surfaces 202a, 202b, and 202c are arranged radially (axisymmetrically) with the tower 9 as the center when viewed in plan view.
A plurality of (for example, 500) heat transfer tubes 203 are arranged along each heat receiving surface 202a, 202b, 202c (see FIG. 4). That is, the surfaces formed by arranging the plurality of heat transfer tubes 203 in a plane form are the heat receiving surfaces 202a, 202b, 202c. A compressive working fluid flows through each heat transfer tube 203.

The casing 201 is formed with three sunlight inlets 204a, 204b, and 204c (however, the sunlight inlet 204c is not shown).
The sunlight entrance 204a captures the sunlight reflected and projected by the condenser 11 arranged on the mirror arrangement surface 10a into the casing 201, and opposes the heat receiving surface 202c among the surfaces of the heat receiving surface 202a. Of the heat receiving surface 202c and the surface facing the heat receiving surface 202a.
The sunlight entrance 204b is a surface of the heat receiving surface 202a facing the heat receiving surface 202b and the heat receiving surface 202b of the sunlight reflected and collected by the condenser 11 disposed on the mirror arrangement surface 10b. Are formed at a position to irradiate the surface facing the heat receiving surface 202a.
The sunlight entrance 204c includes the surface of the heat receiving surface 202b facing the heat receiving surface 202c and the heat receiving surface 202c of the sunlight reflected and collected by the collector 11 disposed on the mirror arrangement surface 10c. Are formed at positions where the surface facing the heat receiving surface 202b is irradiated.

  Accordingly, among the surfaces of the heat receiving surface 202a facing the heat receiving surface 202c, that is, among the peripheral surfaces of the plurality of heat transfer tubes 203 arranged along the heat receiving surface 202a, the solar peripheral wall on the solar inlet 204a side has sunlight. Sunlight taken from the entrance 204a is irradiated. At the same time, out of the surfaces of the heat receiving surface 202a facing the heat receiving surface 202b, that is, among the peripheral surfaces of the plurality of heat transfer tubes 203 disposed along the heat receiving surface 202a, the sun light inlet 204b side has a semi-peripheral surface. Sunlight taken from the entrance 204b is irradiated.

  Further, among the surfaces of the heat receiving surface 202b, the surface facing the heat receiving surface 202a, that is, the peripheral surface of the plurality of heat transfer tubes 203 arranged along the heat receiving surface 202b, the sun light inlet 204b side has a half peripheral surface. Sunlight taken from the entrance 204b is irradiated. At the same time, among the surfaces of the heat receiving surface 202b facing the heat receiving surface 202c, that is, of the peripheral surfaces of the plurality of heat transfer tubes 203 arranged along the heat receiving surface 202b, the solar inlet 204c side has a semi-peripheral surface. Sunlight taken from the entrance 204c is irradiated.

  Furthermore, among the surfaces of the heat receiving surface 202c, the surface facing the heat receiving surface 202b, that is, the peripheral surface of the plurality of heat transfer tubes 203 arranged along the heat receiving surface 202c, Sunlight taken from the entrance 204c is irradiated. At the same time, out of the surfaces of the heat receiving surface 202c facing the heat receiving surface 202a, that is, among the peripheral surfaces of the plurality of heat transfer tubes 203 arranged along the heat receiving surface 202c, the sun light inlet 204a side has a half peripheral surface. Sunlight taken from the entrance 204a is irradiated.

As a result, each heat transfer tube 203 arranged on each heat receiving surface 202a, 202b, 202c is heated from the peripheral surface on one side and the peripheral surface on the other side, that is, both surfaces (all peripheral surfaces). Accordingly, the peripheral surface of the heat transfer tube through which the compressive working fluid flows can be heated uniformly, and the compressive working fluid can be effectively heated. Further, the thermal stress acting on the heat transfer tube 203 can be made uniform to reduce the stress acting on the heat transfer tube 203 as a whole, and the life of the heat transfer tube 203 is extended.
Moreover, it is suitable for Example 2 to install in the area near the equator where sunlight is irradiated toward the ground 8 from substantially right above.

In the embodiment shown in FIG. 5, three heat receiving surfaces are set and three sunlight inlets are provided, but generally speaking, when N is an integer of 3 or more, N heat receiving surfaces are provided. It is also possible to set the surface and provide N sunlight entrances.
Of course, also at this time, the N heat receiving surfaces are set radially (axisymmetrically arranged) around the tower when viewed in plan, and a plurality of heat transfer tubes are arranged along each heat receiving surface. Among them, N sunlight inlets are formed at each position where the sunlight projected from the condenser can be irradiated to the opposing surfaces of the heat receiving surfaces adjacent to each other in the circumferential direction.

  In the configuration shown in FIG. 1, instead of the solar heat receiver 100, the solar heat receiver 200 according to the second embodiment can be used to configure a solar heat gas turbine or a solar gas generator.

A solar heat receiver 300 according to Embodiment 3 of the present invention will be described with reference to FIG.
The solar heat receiver 300 is a device for converting sunlight into heat energy. As shown in FIG. 6, the top of the tower 9 erected on the ground 8 (for example, the tip of the tower 9 having a height of 300 m). ).

On the ground 8, mirror arrangement surfaces 10a, 10b, 10c, 10d, 10e, and 10f are set. In this example, six mirror arrangement surfaces 10a, 10b, 10c, 10d, 10e, and 10f are arranged in a line with a mutual interval therebetween.
Each mirror arrangement surface 10a, 10b, 10c, 10d, 10e, 10f has a plurality of collectors 11 (see FIG. 3) that reflect sunlight toward the solar heat receiver 300 (for example, 400). Has been placed.
Each concentrator 11 is a device that collects sunlight while efficiently reflecting sunlight, and the direction of the concentrator 11 is the sun so that the reflected and condensed sunlight is projected toward the solar heat receiver 300. It is to be controlled according to the movement of.

The casing 301 of the solar heat receiver 300 is disposed at the top of the tower 9, and a heat insulating material is applied to the inner wall surface of the casing 301 to form a heat insulating wall. In the internal space of the casing 301, three heat receiving surfaces 302a, 302b, and 302c that spread in the vertical plane are set. The three heat receiving surfaces 302a, 302b, and 302c are set in a state where adjacent ones face each other (become parallel) while keeping a mutual interval.
A plurality of (for example, 500) heat transfer tubes 303 are arranged along each of the heat receiving surfaces 302a, 302b, and 302c (see FIG. 4). That is, the surfaces formed by arranging a plurality of heat transfer tubes 303 in a planar shape are heat receiving surfaces 302a, 302b, and 302c. A compressive working fluid flows through each heat transfer tube 303.

  The casing 301 is formed with four sunlight inlets 304a, 304b, 304c, and 304d.

  The sunlight entrance 304a takes in the casing 301 the sunlight reflected and condensed by the condenser 11 arranged on the mirror arrangement surface 10a and projects one surface of the heat receiving surface 302a (the left surface in FIG. 6). ) To be irradiated.

  The sunlight entrance 304b takes in sunlight reflected and collected by the condenser 11 arranged on the mirror arrangement surface 10d into the casing 301, and the other surface of the heat receiving surface 302a (the right surface in FIG. 6). ) And reflected by the collector 11 arranged on the mirror arrangement surface 10b and projected from the sunlight is taken into the casing 301, and one surface of the heat receiving surface 302b (in FIG. 6) (Left side) is formed at a position to be irradiated.

  The sunlight entrance 304c takes the sunlight reflected and collected by the condenser 11 arranged on the mirror arrangement surface 10e into the casing 301, and the other surface of the heat receiving surface 302b (the right surface in FIG. 6). ) And reflected by the collector 11 arranged on the mirror arrangement surface 10c and projected from the sunlight is taken into the casing 301, and one surface of the heat receiving surface 302c (in FIG. 6) (Left side) is formed at a position to be irradiated.

  The sunlight entrance 304d takes the sunlight reflected and collected by the collector 11 arranged on the mirror arrangement surface 10f into the casing 301, and the other surface of the heat receiving surface 302b (the right surface in FIG. 6). ) To be irradiated.

  Therefore, one of the heat receiving surfaces 302a, that is, of the peripheral surfaces of the plurality of heat transfer tubes 303 arranged along the heat receiving surfaces 302a, the solar light taken in from the sunlight inlet 304a is formed on the half peripheral surface on the sunlight inlet 304a side. Is irradiated. At the same time, of the other surface of the heat receiving surface 302a, that is, the peripheral surface of the plurality of heat transfer tubes 303 arranged along the heat receiving surface 302a, the solar light taken in from the solar light inlet 304b on the half peripheral surface on the solar light inlet 304b side. Is irradiated.

  Further, one of the surfaces of the heat receiving surface 302b, that is, the peripheral surface of the plurality of heat transfer tubes 303 arranged along the heat receiving surface 302b, was taken in from the solar light inlet 304b into the half peripheral surface on the solar light inlet 304b side. Sunlight is irradiated. At the same time, of the other surface of the heat receiving surface 302b, that is, among the peripheral surfaces of the plurality of heat transfer tubes 303 arranged along the heat receiving surface 302b, the sun taken in from the solar light inlet 304c is formed on the half peripheral surface on the solar light inlet 304c side. Light is irradiated.

  Furthermore, one of the heat receiving surfaces 302c, that is, the peripheral surface of the plurality of heat transfer tubes 303 arranged along the heat receiving surface 302c, the solar light taken in from the sunlight inlet 304c is formed on the half peripheral surface on the sunlight inlet 304c side. Is irradiated. At the same time, of the other surface of the heat receiving surface 302c, that is, the peripheral surface of the plurality of heat transfer tubes 303 arranged along the heat receiving surface 302c, the solar light taken in from the solar light inlet 304d on the half peripheral surface on the solar light inlet 304d side Is irradiated.

As a result, each heat transfer tube 303 arranged on each heat receiving surface 302a, 302b, 302c is heated from the peripheral surface on one side and the peripheral surface on the other side, that is, both surfaces (all peripheral surfaces). Accordingly, the peripheral surface of the heat transfer tube through which the compressive working fluid flows can be heated uniformly, and the compressive working fluid can be effectively heated. Further, the thermal stress acting on the heat transfer tube 303 can be made uniform to reduce the stress acting on the heat transfer tube 303 as a whole, and the life of the heat transfer tube 303 is extended.
Moreover, it is suitable for Example 3 to install in the area of high latitude where sunlight is irradiated to the ground 8 diagonally.
Furthermore, since the heat receiving surface is divided into three, the area of the heat receiving surface per sheet can be reduced, and the overall outer diameter can be reduced.

In the embodiment shown in FIG. 6, three heat receiving surfaces are set and four sunlight inlets are provided. Generally speaking, when M is an integer of 3 or more, M heat receiving surfaces are provided. It is also possible to set the surface to have M + 1 solar entrances.
Of course, at this time as well, M heat receiving surfaces are set in a state where adjacent ones face each other while being spaced apart from each other, and a plurality of heat tubes are arranged along each heat receiving surface. M + 1 sunlight inlets are formed at each position where the sunlight projected from the collector can be irradiated to one surface and the other surface.

  In the configuration shown in FIG. 1, instead of the solar heat receiver 100, the solar heat receiver 300 according to the third embodiment can be used to configure a solar heat gas turbine or a solar gas generator.

8 Ground 9 Tower 10a to 10f Mirror arrangement surface 100, 200, 300 Solar heat receiver 101, 201, 301 Casing 102, 202a to 202c, 302a to 302c Heat receiving surface 103, 203, 303 Heat transfer tubes 104a, 104b, 204a to 204c , 304a-304d Sunlight entrance

Claims (3)

A casing formed with a solar light inlet that is arranged at the top of a tower erected on the ground and takes in sunlight that has been collected and projected by a light collector disposed on the ground, and
A plurality of heat transfer tubes disposed in the casing and heated by irradiation with sunlight taken into the casing;
A solar heat receiver with
In the casing, set a heat receiving surface extending in a vertical plane, arrange a plurality of the heat transfer tubes along the heat receiving surface,
Among the casing, the solar light entrance is formed at each position where the solar light projected from the light collector can be irradiated to one surface and the other surface of the heat receiving surface. A solar heat receiver characterized by that. A casing formed with a solar light inlet that is arranged at the top of a tower erected on the ground and takes in sunlight that has been collected and projected by a light collector disposed on the ground, and
A plurality of heat transfer tubes disposed in the casing and heated by irradiation with sunlight taken into the casing;
A solar heat receiver with
In the casing, a plurality of heat receiving surfaces spreading in a vertical plane, when viewed in plan, is set radially with the tower as a center, and a plurality of the heat transfer tubes are arranged along each heat receiving surface,
The solar light inlet is formed at each position where the solar light projected from the light collector can be irradiated to the opposing surfaces of the heat receiving surfaces adjacent to each other in the circumferential direction in the casing. A solar heat receiver characterized by A casing formed with a solar light inlet that is arranged at the top of a tower erected on the ground and takes in sunlight that has been collected and projected by a light collector disposed on the ground, and
A plurality of heat transfer tubes disposed in the casing and heated by irradiation with sunlight taken into the casing;
A solar heat receiver with
In the casing, a plurality of heat receiving surfaces spreading in a vertical plane are set in a state where adjacent ones face each other while taking a mutual interval, and a plurality of the heat transfer tubes are arranged along each heat receiving surface,
The solar light inlet is formed at each position where the sunlight projected from the light collector can be irradiated to one surface and the other surface of the heat receiving surfaces of the casing. A solar heat receiver characterized by

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