JP2012117394A - Solar heat receiving instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid the installation of a columnar support for supporting a solar heat receiving instrument on a route from the solar heat receiving instrument to the sunlight inlet thereof, and to simplify a support structure for supporting the instrument and to reduce manufacturing costs.SOLUTION: The solar heat receiving instrument 13 is arranged at the top of a tower 21 erected on the ground in which a compressible working fluid is heated and raised in temperature by heat obtained by the conversion of sunlight collected by a solar heat collector arranged on the ground. The solar heat receiving instrument includes modules 41 having the same shapes which are provided with casings 42 equipped with a bottom plate 46 fixed to the upper surface of the top of the tower 21 and a heat-transmitting pipe unit 43 having heat transmitting pipes 52 accommodated in the casing 42 whereby heat is supplied. The modules are arranged back-to-back and bottom ends thereof are connected to the outer circumferential end of the bottom plate 46 in order to form the casing 42. The sunlight inlet 51 that has a circular shape when seen from the front or an elliptical shape when seen from the front is provided in the middle of a plate-shaped member 50 that extends obliquely upward from the outer circumferential end.

Description

  The present invention relates to a solar heat receiver that heats and compresses a compressive working fluid with heat converted from sunlight collected by a solar heat collector (also referred to as “heliostat”).

  As a solar heat receiver, what is arrange | positioned at the top part of a tower is known (for example, refer FIG. 3 of patent document 1).

JP 2010-144725 A

For example, as shown in FIG. 10, the solar heat receiver disposed at the top of the tower is mounted on four columns 102 erected on the top surface (top top surface) 101 of the tower 100 along the vertical direction. It has been.
Further, as shown in FIG. 11, the solar heat receiver 103 includes a casing 104 having an approximately cylindrical appearance and an inner surface (heat receiving surface) of the casing 104 along the vertical direction at (approximately) equal intervals (adjacent to each other). And a plurality of (for example, 500) heat transfer tubes (pipes) 105 arranged so that the distances (pitch) between the central axes along the longitudinal direction of the matching heat transfer tubes 105 are (substantially equal). .

As shown in FIG. 11, a solar inlet 106 having a circular shape when viewed from below is provided at the bottom of the casing 104, and a solar heat collector (not shown) is provided through the solar inlet 106. Sunlight) enters the inside of the casing 104, reaches a plurality of heat transfer tubes 105 arranged on the inner peripheral surface of the casing 104 at (approximately) equal intervals, and the heat transfer tubes 105 The high pressure compressive working fluid passing through the inside is heated and heated.
In addition, the code | symbol G in FIG. 11 has shown the ground in which the tower 100 is erected.

  However, in the solar heat receiver 103 in which the solar light inlet 106 having a circular shape when viewed from the vertically lower side is provided at the bottom of the casing 104, as described above, the solar heat receiver 103 is attached on the support column 102 as shown in FIG. Thus, the sunlight collected by the solar heat collector may hit the support column 102 before reaching the sunlight inlet 106. Therefore, the support column 102 made of an expensive material that has heat resistance and has a strength that can be supported even if the heavy solar heat receiver 103 is thinned is required, and the manufacturing cost is increased. There was a problem.

  This invention is made | formed in view of such a situation, Comprising: The support | pillar which supports a solar heat receiver is arrange | positioned on the path | route from a solar heat collector to the sunlight entrance of a solar heat receiver. An object of the present invention is to provide a solar heat receiver capable of simplifying the support structure that supports the solar heat receiver and reducing the manufacturing cost.

The present invention employs the following means in order to solve the above problems.
The solar heat receiver according to the present invention is arranged at the top of a tower erected on the ground, and operates in a compressible manner by heat converted from sunlight condensed by a solar heat collector disposed on the ground. A solar heat receiver for heating a fluid to raise the temperature, a casing having a bottom plate fixed to the top surface of the top of the tower, and a heat transfer tube having a heat transfer tube housed in the casing and supplied with the heat The modules having the same shape are configured so as to be back to back with each other, and the lower end is connected to the outer peripheral end of the bottom plate to form the casing, and from the outer peripheral end. A solar light entrance having a circular shape in front view or an elliptical shape in front view is provided at the center of the plate-like member extending obliquely upward.

According to the solar heat receiver according to the present invention, since the bottom plate constituting the casing is directly fixed to the top surface of the top of the tower, conventionally, it has been required to install the solar heat receiver on the top of the tower. No support is required.
As a result, it is possible to avoid placing a support column that supports the solar heat receiver on the path from the solar heat collector to the solar light inlet of the solar heat receiver, and a simple support structure for supporting the solar heat receiver And manufacturing cost can be reduced.
Further, since the sunlight inlet is formed to have a circular shape when viewed from the front or an elliptical shape when viewed from the front, the amount of heat leaking from the inside of the casing to the outside of the casing through the sunlight inlet can be minimized. The inside of the casing can be maintained at a high temperature, and the compressive working fluid flowing through the heat transfer tube can be efficiently heated and heated.

  In the solar heat receiver, when the heat transfer tube unit is viewed from above, the central portion in the width direction approaches the back side, both ends in the width direction approach each other, and the left end to the right end in the width direction It is more preferable that it is configured so as to be located on a line having the same curvature across.

According to such a solar heat receiver, the sunlight introduced from the sunlight inlet is efficiently applied to the heat transfer tube, so that the energy conversion efficiency can be improved.
Moreover, according to such a solar heat receiver, since the dimension in the width direction of a heat exchanger tube unit is shrunk, the solar heat receiver can be reduced in size and weight.

  In the solar heat receiver, when the heat transfer tube unit is viewed from above, the central portion in the width direction approaches the back side, both ends in the width direction approach each other, and the left end to the right end in the width direction It is more preferable that it is configured so as to be located on a hyperbola.

According to such a solar heat receiver, the sunlight introduced from the sunlight inlet is efficiently applied to the heat transfer tube, so that the energy conversion efficiency can be improved.
Moreover, according to such a solar heat receiver, since the dimension in the width direction of a heat exchanger tube unit is shrunk, the solar heat receiver can be reduced in size and weight.

  In the solar heat receiver, it is further preferable that a space for accommodating a pipe for guiding the compressive working fluid flowing out from the heat transfer pipe to the turbine is formed between the back surfaces of the modules.

According to such a solar heat receiver, the space formed between the back surfaces of the modules functions as hot banking, and the piping that guides the compressive working fluid flowing out of the heat transfer tubes through the hot banking to the turbine Will be placed.
As a result, the compressive working fluid passing through the pipe can be maintained at a high temperature, or the compressive working fluid passing through the pipe can be further heated to increase the temperature, and the energy conversion efficiency can be improved.

  In the solar heat receiver, it is more preferable that a lid for closing the space is provided.

According to such a solar heat receiver, the opening formed above the space is closed by the lid.
As a result, the interior of the space can be maintained at a higher temperature, and the compressive working fluid that passes through the pipe accommodated in the space can be maintained at a higher temperature, or the compressive working fluid that passes through the pipe can be maintained. Further, the temperature can be raised by heating, and the energy conversion efficiency can be further improved.

  In the solar heat receiver, it is more preferable that the lid body is provided with a vent hole penetrating in the plate thickness direction and an open / close plate for opening and closing the vent hole.

According to such a solar heat receiver, when the vent is opened, the heat in the space is released through the vent, and the temperature in the space is reduced. Further, when the vent is closed, the opening formed above the space is completely closed, and the temperature in the space is raised.
Thereby, the temperature in the space can be maintained within a predetermined temperature range.

  The solar gas turbine according to the present invention includes any one of the above solar heat receivers and a solar heat collector disposed on the ground.

According to the solar gas turbine according to the present invention, it is possible to avoid the support column supporting the solar heat receiver from being disposed on the path from the solar heat collector to the solar light inlet of the solar heat receiver. Since the solar heat receiver that can simplify the support structure for supporting the unit and reduce the manufacturing cost is provided, the support structure at the top of the tower is simplified and the installation cost is reduced. Can do.
Further, since the sunlight inlet is formed to have a circular shape when viewed from the front or an elliptical shape when viewed from the front, the amount of heat leaking from the inside of the casing to the outside of the casing through the sunlight inlet can be minimized. Because it has a solar heat receiver that can maintain the inside of the casing at a high temperature and can efficiently heat and heat the compressive working fluid that circulates in the heat transfer tube, the energy conversion efficiency can be improved. And the overall thermal efficiency can be improved.

  A solar thermal gas turbine power generator according to the present invention includes the solar thermal gas turbine.

According to the solar gas turbine power generator according to the present invention, it is possible to avoid placing a column supporting the solar heat receiver on the path from the solar heat collector to the solar light inlet of the solar heat receiver, Simplified support structure for supporting solar heat receiver and solar heat receiver that can reduce manufacturing cost, simplify support structure at top of tower and reduce installation cost Can be planned.
Further, since the sunlight inlet is formed to have a circular shape when viewed from the front or an elliptical shape when viewed from the front, the amount of heat leaking from the inside of the casing to the outside of the casing through the sunlight inlet can be minimized. Because it has a solar heat receiver that can maintain the inside of the casing at a high temperature and can efficiently heat and heat the compressive working fluid that circulates in the heat transfer tube, the energy conversion efficiency can be improved. Power generation efficiency can be improved.

  According to the solar heat receiver according to the present invention, it is possible to avoid the support column supporting the solar heat receiver from being disposed on the path from the solar heat collector to the solar light inlet of the solar heat receiver. It is possible to simplify the support structure for supporting the container and to reduce the manufacturing cost.

1 is a schematic configuration diagram of a solar gas turbine and a solar gas turbine power generator including a solar heat receiver according to a first embodiment of the present invention. It is the figure which looked at the tower and solar heat receiver which mount the solar heat receiver which concerns on 1st Embodiment of this invention from the side, and showed a part in cross section. It is the figure which looked at the tower and solar heat receiver which mount the solar heat receiver which concerns on 1st Embodiment of this invention from upper direction, and showed a part in cross section. It is the figure which looked at the tower and solar heat receiver which mount the solar heat receiver which concerns on 1st Embodiment of this invention from the left side of FIG. 2 and FIG. 3, and showed a part in cross section. It is the figure which looked at the tower and solar heat receiver which mount the solar heat receiver which concerns on 1st Embodiment of this invention from diagonally upward, and showed a part of solar heat receiver inside. It is the figure which looked at the solar heat receiver which concerns on 3rd Embodiment of this invention from upper direction, and showed a part in cross section. It is the perspective view which looked at the solar heat receiver which concerns on other embodiment of this invention from diagonally upward. It is the perspective view which looked at the cover body of the solar heat receiver which concerns on another embodiment of this invention from diagonally upward. It is the perspective view which looked at the cover body of the solar heat receiver which concerns on another embodiment of this invention from diagonally upward. It is the figure which looked at the tower and solar heat receiver which mounted the conventional solar heat receiver from the side. It is the perspective view which looked at the solar heat receiver shown in FIG. 10 from diagonally upward.

[First Embodiment]
Hereinafter, the solar heat receiver according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 5.
FIG. 1 is a schematic configuration diagram of a solar gas turbine and a solar gas turbine power generator equipped with a solar heat receiver according to this embodiment, and FIG. 2 is a side view of a tower and solar heat receiver equipped with the solar heat receiver according to this embodiment. FIG. 3 is a diagram showing a part in cross-section, FIG. 3 is a diagram showing a tower and a solar heat receiver mounted with the solar heat receiver according to the present embodiment, and a part is shown in cross-section. FIG. FIG. 5 is a partial cross-sectional view of the tower and the solar heat receiver mounted with the solar heat receiver according to the present embodiment as viewed from the left side of FIGS. 2 and 3, and FIG. 5 is equipped with the solar heat receiver according to the present embodiment. It is the figure which looked at the tower and solar heat receiver which were made from diagonally upward, and showed a part of solar heat receiver inside.

  As shown in FIG. 1, a solar gas turbine 11 compresses a compressive working fluid (for example, air) and pressurizes it, and heats the compressive working fluid with heat converted from sunlight to raise the temperature. The solar heat receiver 13 and the turbine 14 that converts the thermal energy held by the high-temperature and high-pressure compressive working fluid into mechanical energy are the main components. That is, the solar gas turbine 11 heats the compressive working fluid by using the thermal energy of sunlight instead of a combustor that burns fuel such as natural gas to generate high-temperature and high-pressure combustion gas. The solar heat receiver 13 is provided.

Moreover, if the generator 15 is connected coaxially with the solar thermal gas turbine 11 and configured to drive the generator 15 with the solar thermal gas turbine 11, the solar thermal gas turbine power generator 10 that generates power using sunlight is obtained.
Reference numeral 16 in the figure denotes a high-pressure compressive operation boosted by the compressor 12 using the exhaust heat of the compressive working fluid discharged from the chimney (not shown) to the atmosphere after working in the turbine 14. A reheater for preheating the fluid.

The solar heat receiver 13 is a device for converting sunlight into heat energy, and as shown in FIGS. 2 and 4, the top of a tower 21 standing on the ground G (for example, a tower 21 having a height of 100 m). At the tip).
A first pipe 22 that guides the compressive working fluid that has passed through the reheater 16 to the solar heat receiver 13 extends along the vertical direction outside the tower 21, and the solar heat receiver is located inside the tower 21. A second piping 23 that guides the compressive working fluid heated and heated at 13 to the turbine 14 installed on the ground G extends (accommodates) in the vertical direction.

One end of the first pipe 22 is connected to the outlet of the reheater 16, and the other end (upper end) of the first pipe 22 is a single branch pipe arranged annularly along the outer peripheral surface of the tower 21. 31 is connected to the lower surface. The central portion of the bottom surface of each inlet header 32 and the upper surface of the branch pipe 31 positioned vertically below are connected via a single branch pipe 33 that stands on the upper surface of the branch pipe 31 and extends vertically upward. Yes.
One end of the second pipe 23 is connected to the inlet of the turbine 14, and the other end (upper end) of the second pipe 23 is connected to one end (outer end) at the center of the back surface of each outlet header 34. The other end (inner end) of the branch pipe 35 extending inward along the direction is connected.

As shown in FIG. 3 or FIG. 5, the solar heat receiver 13 includes four modules 41 having the same shape when the backs of the quartered circles are back-to-back with each other when viewed from above. It is configured to be back to back with each other.
Each module 41 includes a casing 42 and a heat transfer tube unit 43 accommodated in the casing 42.

The casing 42 has a back plate 44 whose inner peripheral surface 44 a is a heat receiving surface, a top plate 45 connected to the upper end of the back plate 44, a bottom plate 46 connected to the lower end of the back plate 44, and the back plate 44. A left side plate 47 connected to the left end and a right side plate 48 connected to the right end of the back plate 44 are provided.
The back plate 44 is a plate-like member having a rectangular shape in plan view, and the left end and the right end thereof are close to each other, and the upper end and the lower end thereof have the same curvature from the left end to the right end ( In this embodiment, it is curved (as if located on an arc drawn with the same radius).

The top plate 45 is curved so as to have the same curvature from the left end to the right end (in the present embodiment, located on an arc drawn with the same radius R), and the outer peripheral end (inner end) ) Is a plate-like member having a substantially semicircular shape in plan view (substantially crescent shape in plan view) connected to the upper end of the back plate 44.
The left side plate 47 has an outer peripheral end (inner end) connected to the left end of the back plate 44, an upper end connected to the left end of the top plate 45, and a lower end connected to the left end of the bottom plate 46. A plate-like member having a home base shape.
The right side plate 48 has an outer peripheral end (inner end) connected to the right end of the back plate 44, an upper end connected to the right end of the top plate 45, and a lower end connected to the right end of the bottom plate 46. A plate-like member having a home base shape.
As shown in FIG. 5, the left side plate 47 and the right side plate 48 have a symmetrical shape, that is, a shape when the left side plate 47 is viewed from one side and a shape when the right side plate 48 is viewed from the other side. Are formed to have the same shape.

The bottom plate 46 is curved so as to have the same curvature from the left end to the right end (in the present embodiment, located on the circular arc drawn with the same radius R), and the outer peripheral end (inner end) curved. Is a plate-like member having a substantially semicircular shape in plan view, connected to the lower end of the back plate 44, connected to the lower end of the left side plate 47, and connected to the lower end of the right side plate 48. .
An opening formed by the outer end of the top plate 45, the outer end located above the left side plate 47, and the outer end located above the right side plate 48 is a back plate 44, a top plate 45, a bottom plate 46, and a left side plate 47. The casing 42 is configured (formed) together with the right side plate 48 and is hermetically sealed (closed) by an upper plate (upper cover plate) 49 having a (triangular) equilateral triangular shape in plan view.

An opening formed by the outer end of the bottom plate 46, the outer end located below the left side plate 47, and the outer end located below the right side plate 48 is a back plate 44, top plate 45, bottom plate 46, left side plate. 47. The casing 42 is configured (formed) together with the right side plate 48, and is sealed (closed) by a lower plate (lower lid plate: plate-like member) 50 having a (triangular) equilateral triangular shape in plan view.
In addition, a sunlight inlet 51 having a circular shape in front view (or an elliptical shape in front view) is provided (formed) at the center of the lower plate 50.
Further, a space S (see FIG. 5) formed by the four back plates 44 and accommodating the other end (upper end) of the second pipe 23 is filled with a heat insulating material (not shown) (see FIG. 5). Containment).

The heat transfer tube unit 43 is arranged along the inner peripheral surface 44a and the horizontal plane of the back plate 44, and along the inlet header 32 disposed below in the casing 42, and the inner peripheral surface 44a and the horizontal plane of the back plate 44. The outlet header 34 disposed above the casing 42, one end (lower end) is connected to the upper surface of the inlet header 32, the other end (upper end) is connected to the lower surface of the outlet header 34, (substantially), etc. A plurality of (for example, 500) heat transfer tubes (pipes) 52 arranged along the vertical direction at intervals (so that the distance between the central axes along the longitudinal direction of the adjacent heat transfer tubes 52 is (substantially) equal). And.
In order to simplify the drawing, only nine heat transfer tubes 52 are shown in FIG.
Further, the heat transfer tubes 52 according to the present embodiment are arranged such that the gap between the adjacent heat transfer tubes 52 is equal to the outer diameter of the heat transfer tubes 52. Thereby, the solar heat passes through the gap between the adjacent heat transfer tubes 52, and the back heat insulating material (not shown) disposed on the back side of the heat transfer tube 52 is heated by the solar heat that has passed through the gap. The back surface side is heated by receiving radiant heat from a back surface heat insulating material (not shown) so that the temperature difference between the front surface and the back surface of the heat transfer tube 52 is reduced.

  As shown in FIG. 3, for example, a mirror arrangement surface 53 having a circular shape in plan view is set on the ground G, and the mirror arrangement surface 53 is set inside the solar heat receiver 13. A plurality of solar heat collectors (not shown) (not shown) that efficiently reflect sunlight are arranged on the inner peripheral surface 44a (see FIG. 5). Sunlight (not shown) collected (reflected) by these solar heat collectors is provided at the center of the lower plate 50 (see FIG. 5) constituting the solar heat receiver 13, as shown in FIG. The solar heat receiver 13 enters the solar heat receiver 13 through the solar light inlet 51, reaches a plurality of heat transfer tubes 52 (see FIG. 5) arranged on the inner peripheral surface 44 a at (approximately) equal intervals, and the heat transfer tubes The high-pressure compressive working fluid passing through the interior of 52 is heated to raise the temperature.

  As shown in FIG. 4, the solar heat receiver 13 is formed through a base (flange) 55 that is formed so that the upper surface thereof is in contact with the entire lower surface of the bottom plate 46 and extends outward along the horizontal direction. These are fixed to the top surface (top surface of the top portion) of the tower 21.

According to the solar heat receiver 13 according to the present embodiment, since the bottom plate 46 constituting the casing 42 is directly fixed to the top surface of the top of the tower 21, the solar heat receiver 103 is conventionally installed at the top of the tower 100. The support column 102 required to do this becomes unnecessary.
Thereby, it can avoid that the support | pillar which supports the solar heat receiver 13 is arrange | positioned on the path | route from the solar heat collector to the sunlight inlet 51 of the solar heat receiver 13, and the solar heat receiver 13 is supported. The support structure can be simplified and the manufacturing cost can be reduced.
Further, since the sunlight inlet 51 is formed so as to have a circular shape when viewed from the front (or an elliptical shape when viewed from the front), the amount of heat leaking from the inside of the casing 42 to the outside of the casing 42 via the sunlight inlet 51 is minimized. The inside of the casing 42 can be maintained at a high temperature, and the compressive working fluid flowing through the heat transfer tube 52 can be efficiently heated and heated.

Moreover, according to the solar heat receiver 13 which concerns on this embodiment, since the sunlight introduce | transduced from the sunlight inlet 51 will be efficiently applied to the heat exchanger tube 52, energy conversion efficiency can be improved.
Furthermore, according to such a solar heat receiver 13, since the dimension in the width direction of the heat exchanger tube unit 43 is reduced, the solar heat receiver 13 can be reduced in size and weight.

Furthermore, according to the solar heat receiver 13 according to the present embodiment, the space S formed in the central portion of the casing 42 along the vertical direction functions as hot banking, and passes through the hot banking so as to pass through the heat transfer tube. The second pipe 23 that guides the compressive working fluid flowing out from the turbine 52 to the turbine 14 is arranged.
Thereby, the compressive working fluid that passes through the second pipe 23 can be maintained at a high temperature, or the compressive working fluid that passes through the second pipe 23 can be further heated to increase the energy conversion efficiency. Can be improved.

[Second Embodiment]
The solar heat receiver which concerns on 2nd Embodiment of this invention is demonstrated.
In the solar heat receiver according to the present embodiment, the space S described in the first embodiment is filled (accommodated) with a heat insulating material thinner than the heat insulating material described in the first embodiment. This is different from the first embodiment. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.

  In the present embodiment, in the space S (see FIG. 5) formed by the four back plates 44, the heat insulating material thinner than the heat insulating material described in the first embodiment, for example, in the first embodiment has been described. Assuming that the heat insulating material has a thickness of 300 mm, in this embodiment, a heat insulating material having a thickness of 220 mm, which is thinner than the heat insulating material described in the first embodiment, is filled.

According to the solar heat receiver according to the present embodiment, since the space S is filled with a heat insulating material thinner than the heat insulating material described in the first embodiment, the weight of the solar heat receiver is reduced. be able to.
In addition, if the size of the space S is reduced in the horizontal direction as much as the heat insulating material is thinned, the solar heat receiver can be reduced in size and further reduced in weight.
Further, since the temperature in the space S increases as the heat insulating material is thinned, the compressive working fluid passing through the second pipe 23 is kept at a higher temperature, or the second pipe 23 The compressive working fluid passing through can be further heated and heated, and the energy conversion efficiency can be further improved.
Other functions and effects are the same as those of the above-described first embodiment, and thus description thereof is omitted here.

[Third Embodiment]
A solar heat receiver according to a third embodiment of the present invention will be described with reference to FIG. FIG. 6 is a partial cross-sectional view of the solar heat receiver according to the present embodiment as viewed from above.
As shown in FIG. 6, the solar heat receiver 61 according to the present embodiment is described above in that the upper and lower ends of the back plate 44 are curved so as to be positioned on an arc drawn by a hyperbola. Different from the embodiment. Since other components are the same as those in the above-described embodiment, description of these components is omitted here.

In the present embodiment, the back plate 44, the top plate 45, the bottom plate 46, the left side plate 47, the right side plate 48, the upper plate 49, and the lower plate 50 are appropriately shaped according to the shape change of the back plate 44. Changes have been made.
Furthermore, the inlet header 32 and the outlet header 34 are curved along the inner peripheral surface 44 a of the back plate 44.

According to the solar heat receiver 61 according to the present embodiment, the upper end and the lower end of the back plate 44 are curved so as to be positioned on an arc drawn by a hyperbola, and the inlet header 32 and the outlet header 34 are Since it is curved along the inner peripheral surface 44a of the back plate 44, the solar heat receiver 61 can be downsized in the horizontal direction.
Other functions and effects are the same as those of the above-described first embodiment, and thus description thereof is omitted here.

Further, according to the solar gas turbine 11 according to the present invention, the support column supporting the solar heat receiver is disposed on the path from the solar heat collector (not shown) to the solar light inlet 51 of the solar heat receiver. Can be avoided, and the support structure for supporting the solar heat receiver can be simplified, and the solar heat receiver that can reduce the manufacturing cost is provided. Therefore, the support structure at the top of the tower 21 can be simplified. In addition, the installation cost can be reduced.
Moreover, since the sunlight inlet 51 is formed so as to have a circular shape in front view or an elliptical shape in front view, the amount of heat leaking from the inside of the casing to the outside of the casing via the sunlight inlet 51 is minimized. And a solar heat receiver that can maintain the inside of the casing at a high temperature and can efficiently heat and heat the compressive working fluid that circulates in the heat transfer tube 52. The overall thermal efficiency can be improved.

Furthermore, according to the solar gas turbine power generator 10 according to the present invention, it is avoided that the support column supporting the solar heat receiver is disposed on the path from the solar heat collector to the solar light inlet 51 of the solar heat receiver. The solar heat receiver can be simplified and the support structure for supporting the solar heat receiver can be reduced, and the manufacturing cost can be reduced. Therefore, the support structure at the top of the tower 21 can be simplified and installed. Cost can be reduced.
Moreover, since the sunlight inlet 51 is formed so as to have a circular shape in front view or an elliptical shape in front view, the amount of heat leaking from the inside of the casing to the outside of the casing via the sunlight inlet 51 is minimized. And a solar heat receiver that can maintain the inside of the casing at a high temperature and can efficiently heat and heat the compressive working fluid that circulates in the heat transfer tube 52. The power generation efficiency can be improved.

Note that the present invention is not limited to the above-described embodiment, and can be modified and changed as necessary.
For example, as shown in FIG. 7, a lid 71 is provided in an opening formed above the space S (see FIG. 5) in the above-described embodiment, and the opening formed above the space S is sealed (closed). You may do it.
Thereby, the inside of the space S can be maintained at a higher temperature, and the compressive working fluid that passes through the second pipe 23 accommodated in the space S is maintained at a higher temperature, or the second pipe. The compressive working fluid passing through the inside 23 can be further heated and heated, and the energy conversion efficiency can be further improved.

Moreover, as shown in FIG. 8, a lid 81 may be provided instead of the lid 71.
A plurality of (three in the present embodiment) vent holes 82 that are rectangular in plan view and penetrate in the thickness direction are provided in a central portion of the lid 81 in a straight line. An opening / closing plate 83 that moves in the arrangement direction of the vent holes 82 (in the left-right direction in FIG. 8) along the lower surface of the lid 81 to open and close the vent holes 82 is provided below the opening 82.
The opening / closing plate 83 has a rectangular shape in plan view and penetrates in the plate thickness direction. When the opening / closing plate 83 is fully opened, the opening / closing plate 82 is fully opened to match the ventilation hole 82, and the ventilation port 82 is half-opened in the half-open state. A through-hole 84 is provided (formed) that closes the vent 82 in a fully closed state (closed half). That is, when the vent 82 is opened, heat in the space S is released through the vent 82, and the temperature in the space S is reduced. Further, when the vent 82 is closed, the opening formed above the space S is completely closed, and the temperature in the space S is raised.
Thereby, the temperature in the space S can be maintained within a predetermined temperature range.

Furthermore, as shown in FIG. 9, a lid 91 may be provided instead of the lid 71.
A plurality of (four in the present embodiment) vent holes 92 having a rectangular shape in plan view and penetrating in the thickness direction are provided side by side in the circumferential direction at the center of the lid 91. The opening 92 is provided with an opening / closing plate 93 that rotates around a rotation shaft (hinge) (not shown) to open and close the vent 92. That is, when the vent 92 is opened, the heat in the space S is released through the vent 92, and the temperature in the space S is reduced. Further, when the vent 92 is closed, the opening formed above the space S is completely closed, and the temperature in the space S is raised.
Thereby, the temperature in the space S can be maintained within a predetermined temperature range.

Furthermore, based on the data (measured value) output from the temperature sensor (not shown) that measures the temperature in the space S to the controller (not shown), the controller opens and closes the open / close plates 83 and 93. You may make it output the control signal to a drive source (not shown), and control the opening degree of the opening-and-closing plate 83,93.
Thereby, the temperature in the space S can be automatically maintained within a predetermined temperature range.

  Furthermore, in the above-described embodiment, the example in which the back surfaces of the quartered circles are back-to-back as viewed from above has been described as a specific example, but the present invention is not limited to this. Rather than being divided into two, it shall be a bisection circle, a trisection circle, a polygon, a circle that is divided into five or more, and a shape in which the backs of the polygons are back to back. You can also.

DESCRIPTION OF SYMBOLS 10 Solar gas turbine power generator 11 Solar gas turbine 13 Solar heat receiver 14 Turbine 21 Tower 23 2nd piping 41 Module 42 Casing 43 Heat exchanger tube unit 46 Bottom plate 50 Lower plate (plate-shaped member)
51 Solar Inlet 52 Heat Transfer Tube 61 Solar Heat Receiver 71 Lid 81 Lid 82 Vent 83 Opening Plate 91 Lid 92 Vent 93 Opening Plate S Space G Ground

Claims (8)

Solar heat that is placed at the top of a tower erected on the ground and heats the compressive working fluid by heat converted from sunlight collected by a solar heat collector placed on the ground. A heat receiver,
A module having the same shape, comprising a casing having a bottom plate fixed to the top surface of the top of the tower and a heat transfer tube unit that is housed in the casing and is provided with the heat transfer tube to which the heat is applied, The lower end is connected to the outer peripheral end of the bottom plate to form the casing, and a circle in front view is formed at the center of the plate-like member extending obliquely upward from the outer peripheral end. A solar heat receiver, characterized in that a solar light inlet having a shape or an elliptical shape in front view is provided.   When the heat transfer tube unit is viewed from above, the central portion in the width direction approaches the back side, both ends in the width direction approach each other, and have the same curvature from the left end to the right end in the width direction. It is comprised so that it may be located on a line | wire, The solar heat receiver of Claim 1 characterized by the above-mentioned.   When the heat transfer tube unit is viewed from above, the central portion in the width direction approaches the back side, both ends in the width direction approach each other, and are located on a hyperbola from the left end to the right end in the width direction. The solar heat receiver according to claim 1, wherein the solar heat receiver is configured as described above.   4. The solar heat according to claim 1, wherein a space for accommodating a pipe that guides the compressive working fluid flowing out of the heat transfer pipe to the turbine is formed between the back surfaces of the modules. 5. Heat receiver.   The solar heat receiver according to claim 4, wherein a lid that closes the space is provided.   The solar heat receiver according to claim 5, wherein the lid body is provided with a vent hole penetrating in a plate thickness direction, and an open / close plate for opening and closing the vent hole. A solar heat receiver according to any one of claims 1 to 6;
A solar thermal gas turbine, comprising: a solar concentrator disposed on the ground.   A solar gas turbine power generator comprising the solar gas turbine according to claim 7.

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