JP2011007149A - Gas turbine plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas turbine plant reducing power generation cost by increasing efficiency of power generation cycle.SOLUTION: This gas turbine plant 1 includes: a heat receiver 10 receiving heat from the sun; a gas turbine 30 including a compressor 31 and a turbine 32 operated with fluid compressed by the compressor 31 and heated by the heat receiver 10 used as working fluid; a temperature sensor 20 detecting heat from the sun; an auxiliary drive device 34 driven based on temperature of heat detected by the temperature sensor 20 and starting the gas turbine 30; and a generator 36 converting kinetic energy generated by rotation of the turbine 32 to electric energy.

Description

  The present invention relates to a gas turbine plant.

  In recent years, from the viewpoint of preventing global warming and reducing the use of fossil fuels, power generation using clean energy such as natural energy that emits less harmful substances such as carbon dioxide and nitrogen oxides, and recycled energy that recycles resources Attention has been paid. The amount of clean energy exceeds the amount of power energy required worldwide. However, the energy distribution of clean energy is wide, and effective energy (energy that can be taken out and used outside) is low. Due to this, power generation using clean energy is not sufficiently widespread because of low conversion efficiency to power and high power generation costs. As a power generation method, power generation by solar thermal energy using a power generation technology such as a gas turbine, a steam turbine, and a gas turbine combined cycle (GTCC) is expected.

  As a conventional technique, the mainstream is to generate power by a steam turbine by collecting solar heat to heat a heat medium (for example, synthetic oil or molten salt) and exchanging heat of the heat medium to generate steam. . Steam turbine power generation includes, for example, a trough type (two-dimensional condensing). The trough type reflects sunlight by a semi-cylindrical mirror (trough), collects and collects heat on a pipe passing through the center of the cylinder, and raises the temperature of the heat medium passing through the pipe.

  On the other hand, the following techniques are disclosed as patent documents. The solar thermal power generation system shown in Patent Document 1 is arranged in a heat receiver that receives solar heat, a compressor that produces a compressed fluid, and a system that supplies the compressed fluid that has exited the compressor to the heat receiver, and that recovers heat to the compressed fluid. And a turbine that obtains an output by introducing a compressed fluid from a heat receiver, a backup heating device that supplementarily heats the compressed fluid supplied to the turbine, and a generator connected to the turbine. Has been.

JP 11-280638 A

  Conventional steam turbine power generation has a lower output than gas turbine power generation, and it is difficult to increase the efficiency of the power generation cycle. Further, in the case of the trough type, since the mirror is uniaxial control that changes its direction so as to track sunlight, a high temperature rise of the heat medium cannot be expected. Further, in steam turbine power generation, a large amount of water (cooling water) is required for generating steam in the power generation cycle. Moreover, since there are many incidental facilities, such as a steam generator and a condenser, an installation area becomes large and an installation cost and a maintenance cost become high. Moreover, since the consumption of motive power increases as a whole when the number of incidental facilities is large, the power generation cost increases.

  On the other hand, in Patent Document 1, when the required amount of solar heat cannot be obtained in the heat receiver, the temperature of the compressed fluid supplied from the heat receiver to the turbine becomes low and the turbine cannot be driven efficiently. The burden on the apparatus is increased and the power generation cost is increased. Further, since the compressor and the turbine are not directly connected, the driving power of the compressor is increased, and it is necessary to increase the capacity of the compressor driving motor and the torque converter.

  This invention is made | formed in view of such a situation, Comprising: It aims at improving the efficiency of a power generation cycle and providing the gas turbine plant which reduced the power generation cost.

  In order to solve the above problems, a gas turbine plant of the present invention operates with a heat receiver that receives heat from the sun, a compressor, and a fluid that is compressed by the compressor and heated by the heat receiver as a working fluid. A gas turbine having a turbine that performs heat, a temperature sensor that detects heat from the sun, an auxiliary drive device that is driven based on the temperature of the heat detected by the temperature sensor and starts the gas turbine, and rotation of the turbine And a generator for converting the generated kinetic energy into electric energy.

  According to this configuration, since a gas turbine (compressor and turbine) without a combustor is used instead of the steam turbine, the efficiency of the power generation cycle can be increased as compared with the steam turbine. Specifically, since a heat receiver is used in place of the combustor, the temperature of the compressed fluid that has come out of the compressor can be increased by the heat from the sun and supplied to the turbine. Further, the present invention does not require water in the power generation cycle unlike a steam turbine. Moreover, since it is not necessary to provide incidental facilities such as a steam generator and a condenser, the facility installation area can be reduced, and the facility installation cost and the maintenance cost can be reduced. In addition, since the number of incidental facilities is small, overall power consumption is reduced and power generation costs are reduced. Moreover, in this invention, since an auxiliary drive device drives based on the temperature of the heat | fever detected by the temperature sensor, when a required amount of solar heat is not acquired to a heat receiver, a compressor and a turbine do not start. That is, when the temperature of the working fluid supplied from the heat receiver to the turbine is low and the turbine cannot be driven efficiently, the driving energy of the compressor and the turbine can be suppressed, so that the power generation cost can be reduced. Therefore, it is possible to provide a gas turbine plant that improves the efficiency of the power generation cycle and reduces the power generation cost.

  Moreover, in the said gas turbine plant, the said compressor and the said turbine may be directly connected by the mutually coaxial rotating shaft, and the said rotating shaft may be rotated by the drive of the said auxiliary drive device.

  According to this configuration, since the compressor and the turbine are directly connected to each other by the coaxial rotating shaft, the driving power of the compressor can be supplemented by the power generated by the rotation of the turbine. For this reason, the capacity | capacitance of an auxiliary drive device or a torque converter can be made small. Therefore, it is possible to provide a gas turbine plant that can reliably increase the efficiency of the power generation cycle and significantly reduce the power generation cost.

  The gas turbine plant may further include a regenerative heat exchanger that exchanges heat between the working fluid and the turbine exhaust before the working fluid is heated by the heat receiver.

  According to this configuration, the temperature of the working fluid heated by the heat receiver can be increased in advance because the temperature of the working fluid is raised by the exhaust of the turbine before being heated by the heat receiver. Therefore, it is possible to provide a gas turbine plant that can reliably increase the efficiency of the power generation cycle and significantly reduce the power generation cost.

  In the gas turbine plant, the compressor and the heat receiver may be directly connected.

  According to this configuration, since the compressor and the heat receiver are directly connected, the facility installation area can be reduced and the facility installation cost can be reduced. Moreover, the compressed fluid that has flowed out of the compressor is supplied to the heat receiver and heated without being lost in pressure. Therefore, the gas turbine plant which aimed at the stability and reliability of the power generation cycle can be provided.

  Further, the gas turbine plant may include an auxiliary combustor that performs auxiliary combustion of the working fluid and flows into the turbine.

  According to this configuration, when the solar energy cannot be used at night or when the weather conditions are poor and the solar energy is insufficient, the working fluid heated by the heat receiver is supplementally heated to increase the temperature and supply it to the turbine. it can. Therefore, the gas turbine plant which aimed at the stability and reliability of the power generation cycle can be provided.

  Further, the gas turbine plant includes a tower in which the heat receiver is disposed at an upper portion, and a heliostat that is disposed around the tower and collects light from the sun and reflects the light to the heat receiver. It may be.

  According to this structure, sunlight is condensed on the heat receiver at the upper part of the tower by the heliostat, so that it is converted into high-temperature heat energy. Therefore, it is possible to provide a gas turbine plant that greatly improves the efficiency of the power generation cycle.

  Further, in the gas turbine plant, the tower is provided with a plurality of reinforcing members that are spaced apart from each other in the longitudinal direction of the tower, and the interval transmits light from the sun from the heliostat to the heat receiver. It may be set larger as it approaches the upper part of the tower in the range of the optical path for entering light.

  According to this structure, sunlight is reliably condensed on the heat receiver at the top of the tower by the heliostat, so that it is converted into high-temperature heat energy. That is, the light reflected by the heliostat is collected on the heat receiver at the top of the tower without being blocked by the reinforcing member. Therefore, it is possible to provide a gas turbine plant that greatly improves the efficiency of the power generation cycle.

  Moreover, in the said gas turbine plant, the said temperature sensor, the said auxiliary drive device, the said gas turbine, and the said generator may be arrange | positioned at the said tower upper part.

  According to this configuration, since the apparatus is concentrated on the upper part of the tower, the facility installation area can be reduced and the facility installation cost can be reduced.

  Moreover, in the said gas turbine plant, the silencer which cancels the vibration of the said generator may be provided in the said tower upper part.

  According to this configuration, the vibration of the generator is canceled by the vibration absorber, and tower resonance can be prevented. Therefore, the gas turbine plant which aimed at the stability and reliability of the power generation cycle can be provided.

  A gas turbine plant of the present invention includes a heat receiver that receives heat from the sun, a gas turbine that includes a compressor and a turbine that is compressed by the compressor and that operates using a fluid heated by the heat receiver as a working fluid, A temperature sensor that detects heat from the engine, an auxiliary drive device that starts driving the gas turbine based on the temperature of the heat detected by the temperature sensor, and a generator that converts kinetic energy generated by the rotation of the turbine into electrical energy Since a gas turbine without a combustor is used instead of the steam turbine, the efficiency of the power generation cycle can be improved as compared with the steam turbine. Specifically, since a heat receiver is used in place of the combustor, the temperature of the compressed fluid that has come out of the compressor can be increased by the heat from the sun and supplied to the turbine. Further, the present invention does not require water in the power generation cycle unlike a steam turbine. Moreover, since it is not necessary to provide incidental facilities such as a steam generator and a condenser, the facility installation area can be reduced, and the facility installation cost and the maintenance cost can be reduced. In addition, since the number of incidental facilities is small, overall power consumption is reduced and power generation costs are reduced. Moreover, in this invention, since an auxiliary drive device drives based on the temperature of the heat | fever detected by the temperature sensor, when a required amount of solar heat is not acquired to a heat receiver, a compressor and a turbine do not start. That is, when the temperature of the working fluid supplied from the heat receiver to the turbine is low and the turbine cannot be driven efficiently, the driving energy of the compressor and the turbine can be suppressed, so that the power generation cost can be reduced. Therefore, it is possible to provide a gas turbine plant that improves the efficiency of the power generation cycle and reduces the power generation cost.

It is a figure which shows the electric power generation cycle of the gas turbine plant of this invention. It is explanatory drawing which shows the positional relationship of a heliostat and the heat receiver of the tower upper part. It is a top view which shows the arrangement configuration of the heliostat around a tower. It is a schematic diagram which shows schematic structure of a tower upper part. It is a perspective view which shows schematic structure of a heat receiver.

  Embodiments of the present invention will be described below with reference to the drawings. This embodiment shows one aspect of the present invention, and does not limit the present invention, and can be arbitrarily changed within the scope of the technical idea of the present invention. Moreover, in the following drawings, in order to make each structure easy to understand, an actual structure and a scale, a number, and the like in each structure are different.

  FIG. 1 is a diagram showing a power generation cycle of a gas turbine plant of the present invention. As shown in FIG. 1, the gas turbine plant 1 includes a heat receiver 10, a temperature sensor 20, an auxiliary drive device 34, a rotating shaft 33, a gas turbine 30, an auxiliary combustor 21, and a regenerative heat exchanger 35. And a generator 36.

  The heat receiver 10 is arrange | positioned in the position which sunlight irradiates, and has the function to receive the heat from the sun. As the heat receiver 10, for example, a cavity type in which a heat receiving tube is placed inside a casing can be used. In addition, the detailed structure of the heat receiver 10 is mentioned later (refer FIG.4 and FIG.5).

  The temperature sensor 20 is disposed in the vicinity of the heat receiver 10 and has a function of detecting heat received by the heat receiver 10. As the temperature sensor 20, for example, a thermocouple can be used. Moreover, as a thermocouple, it is preferable to use what joined the platinum rhodium alloy and platinum from the surface of the measurement range and the measurement precision.

  The auxiliary drive device 34 is connected to one end of the rotary shaft 33 and is driven based on the temperature of the heat detected by the temperature sensor 20. As the auxiliary drive device 34, for example, an electric motor can be used. The electric motor 34 rotates the rotating shaft 33 based on a control signal from a control device (not shown) when the temperature of the heat detected by the temperature sensor 20 becomes equal to or higher than an allowable temperature. That is, when a necessary amount of solar heat is not obtained in the heat receiver 10, the rotating shaft 33 does not rotate.

  The gas turbine 30 includes a compressor 31 and a turbine 32 and is started by driving an electric motor 34. The compressor 31 sucks and compresses a fluid (for example, air) serving as a heat medium to generate a compressed fluid. The turbine 32 is rotated by the energy of the working fluid (high temperature compressed fluid) supplied via the regenerative heat exchanger 35 and the heat receiver 10. Thus, in this embodiment, since the gas turbine 30 without a combustor is used instead of the steam turbine, the power generation cycle can be performed more efficiently than the steam turbine. Further, unlike a steam turbine, water is not required in the power generation cycle. Moreover, since it is not necessary to provide incidental facilities such as a steam generator and a condenser, the facility installation area can be reduced. Moreover, since the number of incidental facilities is small, overall power consumption is reduced.

  The compressor 31 and the turbine 32 are directly connected to each other by a coaxial rotating shaft 33. The rotating shaft 33 is rotated by driving the electric motor 34. Thereby, the driving power of the compressor 31 can be supplemented with the power generated by the rotation of the turbine 32. For this reason, the capacity of the electric motor 34 and the torque converter (not shown) can be reduced.

  The auxiliary combustor 21 is provided between the heat receiver 10 and the turbine 32. The auxiliary combustor 21 performs auxiliary combustion of the working fluid supplied to the turbine 32. When the temperature of the working fluid supplied to the turbine 32 is not sufficient, the auxiliary combustor 21 operates based on a control signal from a control device (not shown). As a result, when the solar energy cannot be used at night or when the weather conditions are poor and the solar energy is insufficient, the working fluid heated from the compressor 31 and heated by the heat receiver 10 is supplementarily heated to raise the temperature, thereby causing the turbine 32. Can be supplied to.

  The regenerative heat exchanger 35 is disposed in the vicinity of the gas turbine 30 and has a function of exchanging heat between the compressed fluid (low temperature fluid) supplied from the compressor 31 and the exhaust (high temperature fluid) from the turbine 32. As the regenerative heat exchanger 35, for example, a helical coil heat exchanger or a plate fin heat exchanger can be used.

  The generator 36 is connected to the other end of the rotating shaft 34 and has a function of converting kinetic energy generated by the rotation of the turbine 32 into electric energy.

  Next, the power generation cycle of the gas turbine plant 1 configured as described above will be described. When the temperature of the heat from the sun detected by the temperature sensor 20 exceeds the allowable temperature, the electric motor 34 is driven. When the electric motor 34 is driven, the compressor 31 and the turbine 32 are started. Then, the compressor 31 sucks and compresses a fluid (for example, the atmosphere) to generate a compressed fluid. The compressed fluid generated by the compressor 31 passes through the regenerative heat exchanger 35 and exchanges heat with the exhaust of the turbine 32. The compressed fluid heated by heat exchange (heat recovery) in the regenerative heat exchanger 35 is supplied to the heat receiver 10 and further heated by the heat from the sun. The high temperature compressed fluid whose temperature has been further raised in the heat receiver 10 is supplied to the turbine 32 as a working fluid. Then, the turbine 32 is rotated by the energy of the supplied hot compressed fluid. Then, the kinetic energy generated by the rotation of the turbine 32 is converted into electric energy by the generator 36 and is taken out as electric power.

  Thus, in this embodiment, since the heat receiver 10 is used instead of the combustor, the temperature of the compressed fluid discharged from the compressor 31 can be raised to the turbine 32 with high efficiency by the heat from the sun. it can.

  In addition, when sufficient sunlight is not obtained at night or on a cloudy or rainy day, fuel is injected and burned by the auxiliary combustor 21 disposed between the heat receiver 10 and the turbine 32, and the turbine is The working fluid supplied to 32 is heated to a predetermined temperature.

  Further, the exhaust gas that has worked in the turbine 32 passes through the regenerative heat exchanger 35 as described above and is recovered by the compressed fluid supplied from the compressor 31 and then discharged.

  Next, a tower type (three-dimensional condensing) will be described as an example of the gas turbine plant 1 of the present invention. In the tower type, a heat receiver is placed on a high tower, and a number of reflecting light control mirrors for collecting light called heliostats are placed on the surrounding ground, and the heat is received by the heat receiver at the top of the tower.

  FIG. 2 is an explanatory diagram showing the positional relationship between the heliostat and the heat receiver at the top of the tower. FIG. 3 is a plan view showing an arrangement configuration of heliostats around the tower.

  As shown in FIG. 2, a heliostat field 101 is provided on the ground G. On this heliostat field 101, a plurality of heliostats 102 for reflecting sunlight are arranged. In addition, a tower-type solar light collecting heat receiver 100 that receives the solar light guided by the heliostat 101 is provided at the center of the heliostat field 101. As shown in FIG. 3, the heliostat 102 is disposed on the entire 360 degree circumference of the tower-type solar light collecting heat receiver 100.

  The tower-type solar condensing heat receiver 100 is composed of a tower 110 erected on the ground G and a heat receiver 10 installed in the accommodation chamber 120 above the tower 110.

  The tower 110 is provided with a plurality of reinforcing members 111. The reinforcing members 111 are provided so as to intersect with the longitudinal direction of the tower 110 and have an interval (distance between adjacent reinforcing members) P. The interval P increases as it approaches the upper portion of the tower 110 (the side on which the heat receiver 10 is installed) in a range that is an optical path for allowing light from the sun to enter the heat receiver 10 from the heliostat 102. Thereby, the light reflected by the heliostat 102 is condensed on the heat receiver 10 above the tower 110 without being blocked by the reinforcing member 111. The arrangement structure of the reinforcing member 111 is preferably a truss structure, for example, from the viewpoint of ensuring rigidity.

  FIG. 4 is a schematic diagram showing a schematic configuration of the upper part of the tower. Fig.4 (a) is a top view which shows schematic structure of the tower upper part. FIG. 4B is a cross-sectional view showing a schematic configuration of the upper part of the tower. FIG. 5 is a perspective view showing a schematic configuration of the heat receiver.

  As shown in FIG. 4A, the storage chamber 120 at the top of the tower 110 has a circular shape in plan view. The heat receiver 10 includes a cylindrical casing 11 and a heat receiving pipe 12.

  As illustrated in FIG. 4B, the storage chamber 120 has a structure having two storage chambers, an upper storage chamber 121 and a lower storage chamber 122. On the lower surface side of the lower housing chamber 122, an opening 122c for taking in sunlight is provided. The opening 122c has a circular shape according to the spot diameter of sunlight.

  The heat receiver 10 is provided in the lower housing chamber 122. Specifically, the heat receiver 10 is fixed to the upper wall 122a of the lower housing chamber 122 via a suspension 123, and is suspended from the upper wall 122a in the lower housing chamber 122. That is, the heat receiver 10 is arranged away from the inner wall of the lower housing chamber 122 so as not to contact the inner wall of the lower housing chamber 122. A plurality of suspension tools 123 are provided in the circumferential direction of the upper wall 122a, and have a flexible structure. The suspension 123 penetrates the casing 11 and is integrated with a suspension 124 described later. Thereby, when heat exchange is performed inside the heat receiver 10 and the temperature becomes high (for example, 900 ° C. or higher), the casing 11 can be allowed to deform due to thermal expansion. Further, an opening 11 b for taking in sunlight is provided on the lower surface side of the casing 11. The opening 11b has a circular shape according to the spot diameter of the sunlight, similarly to the opening 122c described above.

  On the other hand, in the upper storage chamber 121, the temperature sensor 20, the electric motor 34, the rotating shaft 33, the gas turbine 30, the auxiliary combustor 21, the regenerative heat exchanger 35, the generator 36, and the vibration damping A container 37 is disposed. That is, in the upper storage chamber 121, the apparatus excluding the heat receiver 10 among the apparatuses constituting the gas turbine plant 1 described above is disposed, and in addition, the vibration absorber 37 is disposed. In this way, the equipment installation area is reduced by consolidating the devices on the top of the tower 110.

  Further, an opening 121 b for taking in fluid (atmosphere) supplied to the compressor 31 is provided on the side surface of the upper storage chamber 121. The opening 121b is used to discharge the exhaust from the turbine 32 to the outside as necessary.

  The vibration absorber 37 is disposed in the vicinity of the generator 36. Specifically, the vibration absorber 37 is disposed between the lower wall 121 a of the upper storage chamber 121 and the generator 36. As the vibration absorber 37, for example, natural rubber-based laminated rubber (thin natural rubber and iron plate laminated), elastic sliding bearing (constructed body of laminated rubber and sliding material), laminated rubber with lead plug, oil damper Can be used. With such a configuration, the vibration of the generator 36 is canceled and tower resonance can be prevented.

  The heat receiving pipe 12 includes an upper header pipe 12a, a heat receiving pipe main body 12b, and a lower header pipe 12c. The upper header pipe 12a has a ring shape and is arranged on the upper part of the casing 11. Specifically, the upper header pipe 12a is fixed to the upper wall 11a of the casing 11 integrally with the hanger 123 via a hanger 124, and is suspended from the upper wall 122a. A plurality of suspension tools 124 are provided integrally with the suspension tool 123 in the circumferential direction of the upper wall 122a, and have a movable structure. Thereby, when heat exchange is performed inside the heat receiver 10 and the temperature becomes high (for example, 900 ° C. or higher), the heat receiving pipe 12 can be allowed to deform due to thermal expansion.

  A plurality of heat receiving pipe main bodies 12b are provided between the upper header pipe 12a and the lower header pipe 12c, and one end is connected to the upper header pipe 12a and the other end is connected to the lower header pipe 12c. The heat receiving pipe main body 12b is provided with a predetermined interval (gap) in the circumferential direction of the upper header pipe 12a (lower header pipe 12c). The other end of the heat receiving pipe main body 12 b is exposed to the outside of the casing 11. The heat receiving pipe main body 12b has a linear shape along the longitudinal direction of the casing 11, and is not subjected to bending stress due to its own weight. Further, the flow direction of the working fluid flowing in the heat receiving pipe main body 12b is set to one direction.

  The lower header tube 12c is a ring-shaped or polygonal refracting tube, and is disposed at the lower portion of the casing 11. Specifically, the lower header pipe 12 c is exposed to the outside of the casing 11 and is disposed near the lower wall 122 b in the lower housing chamber 122. With the above configuration, the heat receiving pipe 12 has a structure in which the upper header pipe 12a is fixed to the upper wall 122a in the lower housing chamber 122 via the hanging tool 124 and is suspended from the upper wall 122a as a whole.

  The lower header pipe 12c is provided with an L-shaped inlet pipe 15. A connection pipe 19 is provided between the inlet pipe 15 and the compressor 31. The connection pipe 19 is exposed to the outside of the casing 11 and is disposed along the inner wall of the lower housing chamber 122. The compressed fluid generated by the compressor 31 is supplied to the lower header pipe 12 c via the connection pipe 19 and the inlet pipe 15. The compressed fluid supplied to the lower header pipe 12c is heated by the thermal energy of the sunlight that enters from the opening 11b while passing through the plurality of heat receiving pipe main bodies 12b and the upper header pipe 12a.

  As shown in FIG. 5, a heat insulating material 16 that absorbs solar heat is provided on the inner wall surface of the casing 11. Due to the heat absorbed by the heat insulating material 16, the temperature of the inner surface of the heat insulating material 16 rises, and heat is radiated to the back surface of the heat receiving tube main body 12b (the surface on the side where sunlight does not directly enter) to heat the entire circumferential direction of the heat receiving tube 12. Moreover, the heat insulating material 16 returns the radiant heat emitted from the heat receiving pipe main body 12b to the back surface of the heat receiving pipe main body 12b, and heats the heat receiving pipe main body 12b stably. Moreover, the heat insulating material 16 reduces the emitted-heat amount which goes outside from the heat receiving pipe main body 12b and the upper header pipe 12a.

  In addition, you may provide a reflective mirror in the heat insulating material 16 inner surface (between the casing 11 and the heat insulating material 16), and may reflect light instead of thermal radiation. This reflecting mirror is preferably provided in a portion of the casing 11 where the heat receiving pipe main body 12b is disposed. Thereby, the reflected light of the sunlight which entered through the clearance gap between the heat receiving pipe main bodies 12b can be irradiated to the back surface (surface by the side of the heat insulating material 16) of the heat receiving pipe main bodies 12b, and can be converted into thermal energy.

  On the other hand, an outlet pipe 14 is connected to the upper header pipe 12 a via a plurality of connection pipes 13. One end of each of the plurality of connection pipes 13 is connected to the upper header pipe 12a, and the other end is connected to the outlet pipe 14 so as to have an X shape in plan view. The outlet pipe 14 is bent in the upper housing chamber 121 to have an L shape in cross section, and the end of the outlet pipe 14 opposite to the side connected to the plurality of connection pipes 13 is connected to the turbine 32. ing. The compressed fluid heated through the heat receiving pipe main body 12 b and the upper header pipe 12 a passes through the plurality of connection pipes 13 and further through the outlet pipe 14 and then becomes a high-temperature and high-pressure working fluid and is supplied to the turbine 32.

  According to the gas turbine plant 1 of the present embodiment, the heat receiver 10 that receives heat from the sun, the compressor 31, and the fluid compressed by the compressor 31 and heated by the heat receiver 10 operate as a working fluid. A gas turbine 30 having a turbine 32; a temperature sensor 20 that detects heat from the sun; an electric motor 34 that is driven based on the temperature of the heat detected by the temperature sensor 20 to start the gas turbine 30; And a generator 36 that converts kinetic energy generated by rotation into electrical energy, and uses a gas turbine 30 without a combustor instead of a steam turbine, so that the efficiency of the power generation cycle is improved compared to a steam turbine. It becomes possible to plan. Specifically, since the heat receiver 10 is used instead of the combustor, the temperature of the compressed fluid output from the compressor 31 can be increased by the heat from the sun and supplied to the turbine 32. Further, the present invention does not require water in the power generation cycle unlike a steam turbine. Moreover, since it is not necessary to provide incidental facilities such as a steam generator and a condenser, the facility installation area can be reduced, and the facility installation cost and the maintenance cost can be reduced. In addition, since the number of incidental facilities is small, overall power consumption is reduced and power generation costs are reduced. In the present invention, since the electric motor 34 is driven based on the temperature of the heat detected by the temperature sensor 20, the compressor 31 and the turbine 32 are not started when the necessary amount of solar heat is not obtained in the heat receiver. That is, when the temperature of the working fluid supplied from the heat receiver 10 to the turbine 32 is low and the turbine 32 cannot be driven efficiently, the driving energy of the compressor 31 and the turbine 32 can be suppressed, so that the power generation cost can be reduced. Therefore, it is possible to provide the gas turbine plant 1 that achieves high efficiency of the power generation cycle and reduces the power generation cost.

  Further, according to this configuration, since the compressor 31 and the turbine 32 are directly connected to each other by the coaxial rotating shaft 33, the driving power of the compressor 31 can be supplemented by the power generated by the rotation of the turbine 32. For this reason, the capacity | capacitance of the electric motor 34 or a torque converter can be made small. Therefore, it is possible to provide the gas turbine plant 1 that reliably increases the efficiency of the power generation cycle and significantly reduces the power generation cost.

  Further, according to this configuration, the regenerative heat exchanger 35 is provided between the compressor 31 and the heat receiver 10 so as to exchange heat between the compressed fluid discharged from the compressor 31 and the exhaust of the turbine 32. The working fluid is heated by the exhaust of the turbine 32 before being heated by the heat receiver 10. For this reason, the temperature of the working fluid heated by the heat receiver 10 can be raised in advance. Therefore, it is possible to provide the gas turbine plant 1 that reliably increases the efficiency of the power generation cycle and significantly reduces the power generation cost.

  Further, according to this configuration, since the auxiliary combustor 21 that performs auxiliary combustion of the compressed fluid supplied to the turbine 32 is provided between the heat receiver 10 and the turbine 32, nighttime and weather in which solar energy cannot be used. When conditions are bad and solar energy is insufficient, the working fluid heated by the heat receiver 10 can be supplementarily heated to increase the temperature and supplied to the turbine 32. Therefore, the gas turbine plant 1 which aimed at the stability and reliability of the power generation cycle can be provided.

  Moreover, according to this structure, since the tower type is employ | adopted, sunlight is condensed on the heat receiver 10 of the tower 110 upper part with the heliostat 102, and is converted into high temperature thermal energy. Therefore, it is possible to provide the gas turbine plant 1 that greatly improves the efficiency of the power generation cycle.

  Further, according to this configuration, the tower 110 is provided with the plurality of reinforcing members 111 intersecting the longitudinal direction of the tower with a space P therebetween, and the space P enters light from the sun from the heliostat 102 to the heat receiver 10. Since it becomes larger as it approaches the upper part of the tower 110 in the range of the light path to be lit, sunlight is reliably condensed on the heat receiver 10 above the tower 110 by the heliostat 102. That is, the light reflected by the heliostat 102 is collected on the heat receiver 10 above the tower 110 without being blocked by the reinforcing member 111. Therefore, it is possible to provide the gas turbine plant 1 that greatly improves the efficiency of the power generation cycle.

  Moreover, according to this structure, since various apparatuses, such as the temperature sensor 20, the electric motor 34, the gas turbine 30, and the generator 36, are arrange | positioned in the tower 110 upper part, an apparatus is integrated on the tower 110 upper part, and installation is carried out. The area can be reduced. Therefore, facility installation costs can be reduced.

  Moreover, according to this structure, since the vibration absorber 37 which cancels the vibration of the generator 36 is provided in the upper part of the tower 110, the vibration of the generator 36 is canceled and tower resonance can be prevented. Therefore, the gas turbine plant 1 which aimed at the stability and reliability of the power generation cycle can be provided.

  In addition, in this embodiment, although the regeneration heat exchanger 35 is provided between the compressor 31 and the heat receiver 10, it is not restricted to this. For example, the compressor 31 and the heat receiver 10 may be directly connected. Thereby, an equipment installation area can be reduced and equipment installation cost can be reduced. In addition, the compressed fluid that has flowed out of the compressor 31 is supplied to the heat receiver 10 and heated while maintaining a high pressure without pressure loss. Therefore, the gas turbine plant 1 which aimed at the stability and reliability of the power generation cycle can be provided.

  Moreover, in this embodiment, although the temperature sensor 20 is provided in the vicinity of the heat receiver 10, it is not restricted to this. For example, the temperature sensor 20 may be provided in the vicinity of the heliostat 102. That is, the temperature sensor 20 should just be arrange | positioned in the position which can detect the heat from the sun.

  In the present embodiment, the electric motor 34 is provided at one end of the rotating shaft 33 and the generator 36 is provided at the other end of the rotating shaft 33, but the present invention is not limited thereto. For example, the electric motor 34 and the generator 36 may be provided at one end of the rotating shaft 33. Further, the generator 36 may serve as the electric motor 34 and may be provided at one end of the rotating shaft 33. That is, it is only necessary that the electric motor 34 and the generator 36 are provided coaxially with the rotating shaft 33.

  In the present embodiment, the regenerative heat exchanger 35 is disposed in the vicinity of the gas turbine 30, but is not limited thereto. For example, the regenerative heat exchanger 35 may be disposed in the vicinity of the heat receiver 10. In other words, the regenerative heat exchanger 35 may be disposed at a position where heat exchange between the working fluid and the exhaust of the turbine 32 can be performed before the working fluid is heated by the heat receiver 10.

  Moreover, in this embodiment, although the heliostat 102 is arrange | positioned at 360 degree | times perimeter of the tower 110, it is not restricted to this. For example, the heliostat 102 may be disposed on one side of the tower 110 (an angle range of 180 degrees or less in plan view). That is, the arrangement configuration of the heliostat 102 only needs to be arranged on the side where the effective area of the mirror can be increased depending on the incident / reflection angle of the heliostat 102 corresponding to the actual change in altitude of the sun.

DESCRIPTION OF SYMBOLS 1 Gas turbine plant 10 Heat receiver 20 Temperature sensor 21 Auxiliary combustor 30 Gas turbine 31 Compressor 32 Turbine 33 Rotating shaft 34 Electric motor (auxiliary drive device)
35 Regenerative heat exchanger 36 Generator 37 Vibration absorber 102 Heliostat 110 Tower 111 Reinforcement member P Spacing

Claims (9)

A heat receiver that receives heat from the sun,
A gas turbine having a compressor and a turbine that operates with a fluid compressed by the compressor and heated by the heat receiver as a working fluid;
A temperature sensor that detects the heat from the sun,
An auxiliary drive device that drives based on the temperature of the heat detected by the temperature sensor and starts the gas turbine;
A gas turbine plant comprising: a generator that converts kinetic energy generated by rotation of the turbine into electric energy.   2. The gas turbine plant according to claim 1, wherein the compressor and the turbine are directly connected to each other by a coaxial rotating shaft, and the rotating shaft is rotated by driving of the auxiliary driving device.   The gas turbine plant according to claim 1, further comprising a regenerative heat exchanger that exchanges heat between the working fluid and the exhaust of the turbine before the working fluid is heated by the heat receiver.   The gas turbine plant according to any one of claims 1 to 3, wherein the compressor and the heat receiver are directly connected.   The gas turbine plant according to any one of claims 1 to 4, further comprising an auxiliary combustor that auxiliary burns the working fluid to flow into the turbine.   The tower having the heat receiver disposed thereon, and a heliostat disposed around the tower and collecting light from the sun and reflecting the light to the heat receiver. The gas turbine plant of any one of these.   The tower is provided with a plurality of reinforcing members that are spaced apart from each other in the longitudinal direction of the tower, and the interval is a range that provides an optical path for allowing light from the sun to enter the heat receiver from the heliostat. The gas turbine plant according to claim 6, wherein the gas turbine plant is set larger as it approaches the upper part.   8. The gas turbine plant according to claim 6, wherein the temperature sensor, the auxiliary driving device, the gas turbine, and the generator are arranged in the upper portion of the tower. 9.   The gas turbine plant according to claim 8, wherein a vibration absorber that cancels vibrations of the generator is provided at an upper portion of the tower.

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