KR101322499B1

KR101322499B1 - Power generation system

Info

Publication number: KR101322499B1
Application number: KR1020120020784A
Authority: KR
Inventors: 시게또 아다찌; 마사요시 마쯔무라; 유따까 나루까와; 가즈오 다까하시
Original assignee: 가부시키가이샤 고베 세이코쇼
Priority date: 2011-03-29
Filing date: 2012-02-29
Publication date: 2013-10-28
Also published as: CN102733873A; KR20120112008A; CN102733873B; JP5751885B2; JP2012207827A

Abstract

In a power generation system, heat generated from a generator is efficiently discharged to the outside. The power generation system 1 of the present invention is a power generation system 1 that generates power while circulating the working medium T to the evaporator 2, the power generation device 3, and the condenser 4, and the power generation device 3 is It has an inflator (8), a generator main body (10) and a housing (11), the housing (11) having an inlet (22) for introducing steam from the evaporator (2) to the inflator drive and a first inflator driver being accommodated. A partition 12 for partitioning the second space 14 in which the space 13 and the rotor 9 are accommodated in an isolated state, and an outlet for discharging the working medium T to the condenser 4. (28), the partition wall portion 12 communicates the first space 13 and the second space 14, and expands and cools the vapor in the first space 13 to the second space 14. It has a steam induction part 26 to guide and the bearing accommodation part 17 in which the bearing which supports the rotating shaft 18 is accommodated, and the generator main body 10 is provided between the steam outflow part 26 and the outflow part 28. FIG. Of the rotor (9) There is value.

Description

Power Generation System {POWER GENERATION SYSTEM}

The present invention relates to a power generation system that generates power by using heat recovered from a heat source.

2. Description of the Related Art [0002] Binary generation has been performed as a power generation system that recovers heat from a low-temperature heat source that does not have enough heat to rotate a steam turbine, such as waste heat and geothermal heat in a factory.

In this binary power generation, the low boiling point working medium is evaporated, the power generation device is driven by the steam of this working medium, and power generation is performed (see FIG. 4).

In such binary power generation, the generator is connected to each other by a rotating shaft in which an expander composed of a turbine or a screw rotor and a generator body rotate, thereby completely preventing leakage of the working medium even if a mechanical seal or the like is provided between the expander and the generator body. It is very difficult to do.

Therefore, in the power generation system which performs binary power generation, the system (sealed type) which accommodates the whole power generation apparatus in the sealed state inside may be employ | adopted in some cases.

For example, Patent Literature 1 discloses a power generation apparatus in which a generator comprising a stator around a rotor is directly connected to an expansion engine, wherein the seal portion holding the drive shaft of the expansion engine is connected to the rotor on the generator side. The hermetic power generation apparatus which seals the surrounding space and arrange | positions a stator on the outer peripheral side of the said sealed space, and faces it through the can which the stator and the rotor form part of the partition which forms the said sealed space starts. It is.

Japanese Patent Application Laid-open No. Hei 5-98902

By the way, in the power generation system of patent document 1, since the sealing property of the housing in which a power generation apparatus is accommodated can be improved, there is little worry that a working medium will leak to air | atmosphere. On the other hand, heat generated in the power generation device is less likely to be released from the housing, so that the operating temperature of the power generation device also tends to be high.

In particular, the generator main body of the power generation device, such as a neodymium magnet or a samarium cobalt magnet, is used as a permanent magnet that demagnetizes when the temperature rises, and there is a fear that the power generation efficiency is greatly reduced when the operating temperature of the power generation device increases. In addition, when the temperature of the permanent magnet exceeds a certain level due to such an increase in the operating temperature, the small magnets constituting the permanent magnet deteriorate in directionality, and each causes an arbitrary movement. This temperature is called the Curie point. When the magnet is heated above the Curie point and returned to room temperature, the magnetic force is completely lost, and a predetermined power generation efficiency cannot be achieved, and the power generation device itself must be changed.

This invention is made | formed in view of the above-mentioned problem, Comprising: It is possible to reliably suppress the leakage of a working medium to air | atmosphere, and it is equipped with the power generation apparatus which does not fail by the heat stored inside, and power generation efficiency does not fall. It is an object to provide a power generation system.

In order to achieve the above object, the present invention seeks the following technical means.

That is, the power generation system of the present invention includes an evaporator for generating vapor by evaporating a liquid working medium by a heat source, a power generation device for generating power using the steam generated in the evaporator, and a power generation device used for power generation. A power generation system comprising a condenser for condensing steam to produce a liquid working medium supplied to the evaporator, and generating power in the power generating device while returning the working medium from the evaporator to the evaporator via the power generating device and the condenser. The generator includes an inflator having an inflator drive unit for driving a rotating shaft by the steam while accompanying the expansion of the steam, and a generator having a rotor connected to the inflator driving unit through a rotating shaft to rotate with rotation of the rotating shaft. A main body and a housing for receiving the inflator drive and the rotor The housing includes: an inlet for introducing steam from the evaporator to an inflator driver; a partition for partitioning a first space in which the inflator drive is accommodated and a second space in which the rotor is accommodated; A outlet for discharging the working medium to a condenser, wherein the partition wall communicates with the first space and the second space and expands in the first space to direct the reduced temperature steam to the second space. And a bearing accommodating portion for accommodating a bearing for supporting the rotating shaft, wherein the rotor of the generator body is disposed between the steam outlet portion and the outlet portion.

In addition, the inflator drive unit and the rotor are connected via a rotating shaft disposed in the horizontal direction, the outlet portion is preferably formed on the wall surface of the housing located on the extension line of the axis of the rotary shaft.

Moreover, it is preferable that the said outflow part is formed in the wall surface (lower wall surface) of the said housing so that it may open to the position which includes a housing inner wall surface in a height direction in the bottom part of the said 2nd space.

Moreover, it is preferable that the housing inner wall surface in the bottom part of the said 2nd space is formed so that it may become the inclined surface which goes down toward the said outflow part.

According to the power generation system of the present invention, it is possible to suppress the leakage of the working medium into the air, and to achieve reliable power generation while preventing the power generation efficiency from being lowered or damaged by heat accumulated therein.

1 is a piping diagram showing an overall configuration of a power generation system of the present invention.
2 is a cross-sectional view of a power generator according to the first embodiment.
3 is a cross-sectional view of a power generator according to a second embodiment.
4 is a piping diagram showing an overall configuration of a conventional power generation system.
Fig. 5 is a diagram showing how the working medium thermodynamically changes state when power generation is performed in the power generation system of the present invention (Moriel diagram).
6 is a cross-sectional view of a second space of the power generation device of the third embodiment.

[First Embodiment]

EMBODIMENT OF THE INVENTION Hereinafter, 1st Embodiment of the power generation system 1 which concerns on this invention is described in detail based on drawing.

As shown in FIG. 1, the power generation system 1 of the present invention recovers heat from a heat source of low temperature (for example, 150 ° C. or lower) such as waste heat or geothermal heat of a factory to generate power.

Since such a low temperature heat source does not have the amount of heat which can generate power only by the heat cycle of water, it uses organic medium (prolon etc.) of boiling point lower than water, such as R245fa, etc. as the working medium T, for example, It is necessary to generate electricity using the thermal cycle of the working medium T. Therefore, generating power by using two heat cycles together like the power generation system 1 of the present invention is called binary-cycle power generation.

The subsequent power generation system 1 uses R245fa (an organic refrigerant mainly composed of 1, 1, 1, 3, and 3-Pentafluoropropane) as the working medium T.

The power generation system 1 of the first embodiment includes an evaporator 2 for evaporating a working medium T in a liquid phase by a heat source to produce a working medium T in a gaseous state, and the generated evaporator 2. A power generation device 3 that generates power using steam, and a condenser 4 that condenses the steam used for power generation in this power generation device 3 to generate a liquid working medium T supplied to the evaporator 2. ).

These evaporator 2, the electric power generation apparatus 3, and the condenser 4 are connected by the circulation pipe 5 (circulation line) which circulates the working medium T, and on the path | route of this circulation pipe 5, The pump 6 which circulates the working medium T is arrange | positioned. The pump 6 sends the working medium T in one direction while circulating the working medium T in the order of the evaporator 2, the power generating device 3, and the condenser 4. It is made up.

Hereinafter, the evaporator 2, the power generator 3, the condenser 4, and the pump 6 which comprise the power generation system 1 of 1st Embodiment are demonstrated in detail in order.

As shown in FIG. 1, the evaporator 2 has a role of vaporizing the working medium T flowing in the circulation pipe 5. The primary side of the evaporator 2 is supplied with drainage from a factory, hot water eluted from the basement, and the working medium T is supplied to the secondary side. In the evaporator 2, heat exchange is performed between the heat source supplied to the primary side and the working medium T supplied to the secondary side, thereby producing a gaseous working medium T (vapor).

The working medium T supplied to the secondary side is sent from the condenser 4 via the pump 6, and becomes 20-20 degreeC liquid when R245fa mentioned above is used. On the other hand, the heating medium such as hot water supplied to the primary side has a higher temperature (for example, 50 to 150 ° C) than the boiling point of the working medium T, and can sufficiently evaporate the working medium T. The steam produced by this evaporator 2 is sent to the generator 3.

The power generation device 3 generates power using steam generated by the evaporator 2. This power generator 3 includes an expander 8 having a screw rotor 7 (expander drive unit) which is rotationally driven by steam accompanying expansion, and a rotational power generation using the rotational force of the screw rotor 7. It has the generator main body 10 which has the electron 9. As shown in FIG.

The steam produced in the evaporator 2 is sent to the expander 8 through the circulation pipe 5 to rotate the screw rotor 7. The rotor 9 rotates by this rotational driving force, and electric power is generated in the generator main body 10. In this way, the steam used for power generation is sent to the condenser 4.

In addition, the detailed structure of this power generation apparatus 3 is mentioned later.

The condenser 4 supplies the steam used for power generation in the power generation device 3 to the primary side, heat exchanges with the cooling water supplied to the secondary side, and condenses the steam to form the liquid working medium T. To generate.

The cooling water supplied to this primary side is 0-40 degreeC, and can cool (condense) the vapor | steam of the working medium T to the temperature below boiling point, and can produce the liquid working medium T.

The pump 6 pumps the working medium T of the liquid phase produced in the condenser 4 and sends it to the evaporator 2.

By the way, in the power generation system 1 mentioned above, organic medium is used as the working medium T, and since these are flammable or harmful to the environment, it is not preferable to leak the working medium T into the atmosphere. not. Therefore, the conventional power generation system 1 often provided the power generation device 3 of the hermetic system.

By adopting this sealing method, there is almost no fear that the working medium T leaks into the atmosphere, while heat generated in the power generation device 3 is less likely to be released from the housing 11, and the power generation device 3 Tends to increase the operating temperature.

In order to cope with this problem, the power generation system 1, in particular the power generation device 3, of the present invention not only drives the rotation of the screw rotor 7 of the expander 8 but also drives the steam of the working medium T. Steam is also introduced into the generator main body 10 having the rotor 9 to cool the generator main body 10. Therefore, the flow path which guides the steam of the working medium T which passed through the expander 8 to the generator main body 10 is provided in the housing 11.

Hereinafter, the detail of the power generation apparatus 3 is demonstrated.

As shown in FIG. 2, the power generation device 3 has a housing 11 having a cylindrical shape that falls laterally. The housing 11 is a hollow container that is long in the horizontal direction, for example, circular in cross section. In addition, below, the left-right direction and up-down direction of FIG. 2 are demonstrated as the left-right direction and the up-down direction of the power generation apparatus 3, respectively. In addition, in this 1st Embodiment, it is set so that the left-right direction of the power generation apparatus 3 may follow a horizontal direction.

In the left wall 11L of the housing 11, an inlet 22 for introducing the working medium from the evaporator 2 into the power generating device 3 is provided. In other words, the working medium is connected to the screw rotor 7 ,. 7) An introduction section 22 (detailed later) for introducing (actuating) into the (expander drive section) is provided, and the right side wall 11R of the housing 11 operates in the power generator 3. The outlet part 28 (detailed later) for sending a medium to the condenser 4 is provided.

The inside of the housing 11 is a cavity which can accommodate the working medium T, and the partition part 12 extended up and down is formed in the center part of the left-right direction of the internal space which became this cavity. By this partition 12, the internal space of the housing 11 is partitioned into a first space 13 (left space in FIG. 2) and a second space 14 (right space in FIG. 2). It is.

Two communication holes 15 communicating with the first space 13 and the second space 14 are formed in the horizontal direction (the surface penetrating direction in FIG. 2) in the vertical direction of the partition 12. It is. In each of the communication holes 15, a bearing accommodation portion 17 for storing bearing portions 16 such as bearings is provided.

In each communication hole 15, the rotation shaft 18 penetrates so that an axis center may face left-right direction, and this rotation shaft 18 is rotatably supported by the bearing part 16. As shown in FIG. The rotary shaft 18 has a length such that one end thereof is located at the center of the first space 13 and the other end is located at the center of the second space 14.

As shown in FIG. 2, one end (left end) of the rotating shaft 18 is provided with a pair of screw rotors 7 and 7 (expander drive unit) which are engaged with each other and rotate. On the outer circumferential surface of this screw rotor 7, a screw flight 19 formed in a spirally twisted shape is provided. The screw rotors 7 and 7 are formed in a cylindrical shape so as to surround them, and in the rotor accommodating chamber 20 formed in the cylindrical peripheral wall provided in a projecting shape from the partition 12 to the first space 13. It is accommodated rotatably. The rotor accommodating chamber 20 constitutes a part of the first space 13, and vaporizes the vapor of the working medium T to the screw flights 19 of the screw rotors 7 and 7 surrounded by the cylindrical peripheral wall. By spraying, the screw rotor 7 rotates and rotational drive force is generated in the rotating shaft 18.

Moreover, this screw rotor 7 is rotatably supported by the 2nd bearing part 29 provided separately from the bearing part 16 mentioned above. The second bearing portion 29 is provided on the left side (semi-rotating shaft side) of the screw rotor 7 and has a shape in which the screw rotor 7 is sandwiched between the bearing portion 16 and the second bearing portion 29. It is arranged.

Thus, the screw rotor 7 is arrange | positioned in the 1st space 13, and the 1st space 13 side becomes the expander 8. As shown in FIG.

On the other hand, as shown in FIG. 2, at the other end of the rotating shaft 18, the rotor 9 (rotor) fixed to the rotating shaft 18 and co-rotating is provided. A stator 21 (stator) is disposed outside the diameter of the rotor 9 and on the inner wall surface of the housing 11.

The rotor 9 is comprised by permanent magnets, such as a neodymium magnet and a samarium cobalt magnet, and the stator 21 is comprised by the coil which wound the metal conducting wire. The stator 21 is disposed at a constant distance in the radial direction from the outer circumferential surface of the rotor 9 so as not to impede the rotation of the rotor 9, and is disposed to face the rotor 9. . Electric power is generated by rotating the rotor 9 with respect to the stator 21 in accordance with the rotation of the screw rotor 7.

Thus, the stator 21 and the rotor 9 which rotates in this stator 21 are arrange | positioned in the 2nd space 14, and the 2nd space 14 side becomes the generator main body 10. As shown in FIG. .

By the way, in order to operate the expander 8 by injecting the vapor of the working medium T into the screw rotor 7, it is necessary to introduce the working medium T into the first space 13. Therefore, in the housing 11, as described above, the steam generated by the evaporator 2 is transferred to the screw rotors 7 and 7 (expander drive unit) accommodated in the first space 13 (rotor accommodating chamber 20). An introduction section 22 for introducing (acting) is provided.

In detail, the introduction part 22 passes through the 1st introduction pipe 24 which guides the steam discharged | emitted from the evaporator 2 to the 1st space 13 in which the filter 23 was built, and the filter 23. As shown in FIG. Thus, it has the 2nd introduction pipe | tube 25 which guides the steam after a foreign material is removed to the rotor accommodation chamber 20 which comprises a part of the 1st space 13 and the 1st space 13.

The first introduction pipe 24 is fixed to the upper and lower center portions of the left wall 11L of the housing 11 and extends in the first space 13 in the left and right directions. The first inlet tube 24 is connected with a circulation pipe 5 from the evaporator 2 side, and steam discharged from the evaporator 2 is supplied with a filter 23 through the first inlet tube 24. It flows into the built-in first space 13.

On the other hand, the second introduction pipe 25 is a rotor accommodating chamber 20 which is the first space 13 in which the screw rotors 7 and 7 (expander drive unit) accommodate steam after the foreign matter is removed through the filter 23. ), In other words, to introduce (act) the steam after the foreign matter is removed into the pair of screw rotors 7 and 7 (expander drive unit). The second introduction pipe 25 is hypothesized to extend from the filter 23 to the rotor accommodating chamber 20 in the horizontal direction.

In addition, the foreign matter separated in the filter 23 is stored in the lower portion of the housing 11. The foreign matter is discharged from the inside of the housing 11 by discharge means not shown.

As shown in FIG. 2, the vapor derivation portion 26 is a flow passage perforated in the partition portion 12 so as to distribute the working medium T, and the rotor accommodating chamber constituting the first space 13 ( It is in communication with both 20 and the 2nd space 14. This vapor derivation part 26 expands in the rotor accommodating chamber 20 in the 1st space 13, and the 2nd space 14 which locates the steam of the working medium T on the right side of the partition part 12 is reduced. ) This vapor derivation part 26 is formed slightly below the bearing accommodation part 17 in the partition part 12, and removes the vapor | steam of the working medium T through the upper and lower center part side of the partition part 12. 2 spaces 14 can be distributed.

Steam of the working medium T introduced into the second space 14 through the steam outlet 26 flows along the outer surface of the rotor 9 or the stator 21. In the case of this embodiment, in order to promote the introduction of the working medium T to the half rotor side of the stator 21, the stator side circulation part 27 is formed.

The stator side flow part 27 is a flow path formed in a through shape between the inner wall surface of the housing 11 and the stator 21, and is formed in multiple numbers so as to face left-right direction. Therefore, the working medium T passing through the stator side flow part 27 flows along the inner circumference wall of the housing 11.

Outflow part 28 is a through-hole provided in the up-down direction center part of 11R of right side walls of housing 11. In other words, the outflow part 28 is a perforation formed in the right wall surface of the housing 11 located on the extension line of the axial center of the rotating shaft 18.

The circulation pipe 5 which faces the condenser 4 side communicates with this outflow part 28. The steam of the working medium T after passing through the stator side flow part 27 and cooling the stator 21 and the rotor 9 flows out to the condenser 4 side through the outlet part 28. .

The outflow part 28 may be provided with a filter 23 so that foreign matters can be removed from the steam sent to the condenser 4.

In summary, the power generation device 3 of the present invention includes an inflator 8 having an inflator drive unit for driving the rotary shaft 18 by the steam with expansion of the steam, and an inflator drive unit through the rotary shaft 18. It has a generator main body 10 having a rotor 9 connected to rotate with the rotation of the rotary shaft 18, and a housing 11 for receiving an inflator driver and a rotor 9, the housing 11 ) Isolating the inlet 22 for introducing steam from the evaporator 2 into the inflator drive, the first space 13 in which the inflator drive is accommodated, and the second space 14 in which the rotor 9 is accommodated. It has a partition 12 for forming a furnace compartment, and an outlet for discharging a working medium to a condenser.

In addition, the partition part 12 communicates between the first space 13 and the second space 14, and at the same time, expands in the first space 13 to direct the vaporized steam to the second space 14. It has 26 and the bearing accommodation part 17 in which the bearing which supports the rotating shaft 18 is accommodated. In addition, the rotor 9 of the generator main body 10 is arranged between the steam outlet 26 and the outlet 28.

This power generation device 3 is an evaporator 2 for generating vapor by evaporating a liquid working medium T by a heat source, and a liquid working medium T for condensing vapor and being supplied to the evaporator 2. The power generation system 1 which arrange | positions on the condenser 4 which produces | generates and the pump 6 is provided, and generate | occur | produces in the said generator 3 is comprised.

Next, a method of generating power using the power generation system 1 having the above-described configuration, in other words, a power generation method using the power generation system 1 of the present invention will be described.

As shown in FIG. 1, in the power generation system 1 of the first embodiment, the liquid working medium T is supplied to the evaporator 2 by using heat supplied from a low temperature heat source (hot water in the drawing example). Evaporation is done. At this time, as shown by?-? Of FIG. 5, the liquid working medium T expands isostatically and evaporates (vaporizes). In this way, the steam generated by the evaporator 2 is sent to the power generator 3 along the circulation pipe 5.

In the power generating apparatus 3, the rotor accommodating chamber 20 constituting a part of the first space 13 receives steam that is sent from the evaporator 2 and has passed through the introduction part 22 into the first space 13. And the working medium T is injected into the screw rotor 7 of the expander 8 accommodated in the rotor accommodating chamber 20. The screw rotor 7 rotates by the kinetic energy of this steam. At this time, as indicated by? → 2 in FIG. 5, the enthalpy of the working medium T is lowered by Δh, and the steam of the working medium T is reduced in temperature (cooled) corresponding to Δh.

In this way, while the screw rotor 7 is driven to rotate in the expander 8, the reduced working medium T (for example, about 50 ° C.) passes through the steam outlet 26 to generate the generator body 10. Is sent to the second space 14 in which the rotor 9 is accommodated.

In this second space 14, the rotor 9 connected to the screw rotor 7 via the rotating shaft 18 rotates with respect to the stator 21, and electrical energy is produced (power generation is performed).

By the way, when the power generation operation is being performed, the stator 21 is heated by the generated current. However, in the second space 14, the low temperature working medium T reduced in the first space 13 is introduced through the vapor derivation portion 26, and the stator is passed through the stator side flow portion 27 described above. It flows so that it may return to the circumference | surroundings of 21, and the stator 21 which became high temperature is cooled preferentially.

The inflow of steam from the first space 13 into the second space 14 is not carried out through the bearing portion 16 supporting the rotating shaft 18, but is formed separately for this purpose. Through).

By the way, in the example of FIG. 2, the outflow part 28 and the vapor | steam outflow part 26 are formed in the position near the rotating shaft 18, and are located in the vicinity of the center of the 2nd space 14. As shown in FIG. On the other hand, the stator side distribution part 27 is formed in the vicinity of the housing 11, and is located in the periphery of the 2nd space 14. As shown in FIG. Therefore, the working medium T flows meandering largely to the vapor derivation part 26 → stator side distribution part 27 → outflow part 28, and the rotor 9 and the stator 21 of the generator main body 10 flow. ) Is wrapped around, and cooling is performed reliably. By this cooling action, the power generation efficiency of the generator main body 10 can be stabilized, and it is possible to prevent the failure of the generator caused by the temperature rise.

The steam cooled by the stator 21 and the rotor 9 exits through the outlet portion 28 and is sent to the condenser 4.

In the condenser 4, vapor is liquefied as shown by (2)-(3) of FIG. 5, and is pressurized by the pump 6 as shown by (3)-(4) of FIG.

Thus, in the power generation cycle of the present invention, power generation is performed by the working medium T repeating the state change thermodynamically along the Carnot cycle of FIG. 5.

[Second Embodiment]

Next, the power generation system 1 of 2nd Embodiment is demonstrated using FIG.

As shown in FIG. 3, in the power generation device 3 included in the power generation system 1 of the second embodiment, the outlet portion 28 has a bottom inner wall surface and an outlet portion 28 of the second space 14. ) Is formed in the lower part of the right side wall 11R of the housing 11 so that the opening edge of () continues at least at the lowest position of the bottom inner wall surface. In other words, the lower end part in the opening of the outflow part 28 of 2nd Embodiment is coplanar with the bottom inner wall surface of the 2nd space 14, and has the same height. In this regard, in the power generation apparatus 3 of the power generation system 1 of the first embodiment, the outlet portion 28 extends the rotation shaft 18 to the right (direction from the second space 14 toward the outside). It differs greatly from the structure formed in the part.

That is, as for the outlet part 28 of 2nd Embodiment, the power generation apparatus 3 with which the power generation system 1 of 2nd Embodiment is equipped has the outlet part 28 in the bottom part of the 2nd space 14. Liquid is stored in the bottom of the second space 14 even when the working medium is liquefied in the second space 14, since the inner wall of the housing is formed on the wall of the housing so as to be opened in a position including in the height direction. The working medium T can be introduced into the outlet 28 along the bottom as it is, and can be discharged to the outside (to the condenser side). In addition, even when the lubricating oil is contained in the working medium, the lubricating oil is smoothly discharged from the housing 11 to the outside through the outlet portion 28. In this case, however, it is necessary to provide an oil separator between the outlet 28 and the condenser.

As described above, in the second embodiment, the liquefied working medium and the lubricating oil do not collect in the second space 14, and rotation of the rotor 9 of the generator main body 10 is inhibited by the collected liquid. none.

In addition, since the other structure and the effect which are exhibited are substantially the same as 1st Embodiment, detailed description is abbreviate | omitted.

[Third embodiment]

Next, the power generation system 1 of 3rd Embodiment is demonstrated using FIG.

As shown in FIG. 6, the power generation device 3 included in the power generation system 1 of the third embodiment includes a bottom surface (lower inner wall surface) of the housing 11, in other words, of the second space 14. The inner wall surface of the housing at the bottom portion is formed to be an inclined surface descending toward the outflow portion 28.

Specifically, in the power generation device 3 according to the third embodiment, the portion near the right wall 11R among the bottom surfaces of the housing 11 is located below the side closer to the partition wall 12. The incline is gently inclined downward from the left side to the right side, and the outflow part 28 is provided in the most downward position. The outflow part 28 may be provided with a filter 23 or the like for removing foreign matter from the working medium.

Therefore, even if the working medium is liquefied or lubricating oil is generated in the second space 14, these liquids flow down the inclined surface which is inclined downward toward the outlet portion 28, and the example shown in FIG. In comparison, it is more smoothly discharged to the outside of the housing (11).

In view of the above, in the third embodiment, since the liquefied working medium and the lubricating oil are quickly discharged from the second space 14 to the outside, these liquids do not collect in the second space 14, and the generator body is collected by the collected liquid. Rotation of the rotor 9 of (10) is not inhibited.

In addition, since the other structure and the effect which are exhibited are substantially the same as 1st Embodiment or 2nd Embodiment, detailed description is abbreviate | omitted.

In addition, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. In particular, in the embodiment disclosed this time, matters which are not explicitly disclosed, for example, operating conditions, operating conditions, various parameters, dimensions, weights, volumes, etc. of the components do not deviate from the ranges normally performed by those skilled in the art. The value which can be easily assumed by those skilled in the art is adopted.

For example, in the said embodiment, although the screw type thing which rotationally drives the screw rotor 7 was mentioned as the expander 8, a recipe type | mold or a centrifugal type can also be used as the expander 8.

1: Power generation system
2: evaporator
3: power generation device
4: condenser
5: circulation piping
6: pump
7: screw rotor (expander drive unit)
8: inflator
9: rotor
10: generator body
11: Housing
11L: left wall of housing
11R: Right wall of the housing
12: partition wall
13: first space
14: second space
15: communication hole
16: bearing part
17: bearing receptacle
18: axis of rotation
19: screw flight
20: rotor storage room
21: stator
22: introduction
23: filter
24: the first introduction tube
25: second introduction tube
26: steam extraction unit
27: stator side distribution unit
28: outlet
29: second bearing part
T: working medium

Claims

An evaporator for generating steam by evaporating a liquid working medium by a heat source, a power generation device for generating power using the steam generated in the evaporator, and condensing the steam used for power generation in the power generating device to supply the evaporator In the power generation system having a condenser for producing a working medium of the liquid phase, the power generation system for generating power in the power generation device while returning the working medium from the evaporator to the evaporator via the power generator and the condenser,
The generator includes an inflator having an inflator drive unit for driving the rotary shaft by the steam while accompanying the expansion of the steam, and a generator having a rotor connected to the inflator drive unit through the rotary shaft to rotate in accordance with the rotation of the rotary shaft. A main body, a housing for accommodating the inflator drive unit and the rotor,
The housing includes an inlet for introducing steam from the evaporator into an inflator drive, a partition for partitioning a first space in which the inflator drive is accommodated and a second space in which the rotor is accommodated, and the operation; Has an outlet for draining the medium to the condenser,
The partition wall portion accommodates a bearing which accommodates the rotating shaft and a steam deriving portion for communicating the first space and the second space and leading the thermally reduced steam to the second space while expanding in the first space. Have wealth,
A rotor of the generator body and a stator around the rotor are disposed between the steam outlet and the outlet,
The steam outlet and the outlet are respectively located near the center of the end of the second space, and a flow path of the working medium is provided between the stator and the inner wall of the periphery of the second space such that the working fluid flows along the inner wall of the periphery of the second space. A power generation system, characterized in that it is formed.

The inflator drive unit and the rotor are connected via a rotating shaft disposed along the horizontal direction,
The said outlet part is formed in the wall surface of the said housing located in the extension line of the shaft center of the said rotating shaft, The power generation system characterized by the above-mentioned.

The power generation system according to claim 1, wherein the outlet portion is formed on a wall surface of the housing so as to open at a position including the housing inner wall surface at the bottom of the second space in the height direction.

The power generation system according to claim 3, wherein the housing inner wall surface at the bottom of the second space is formed to be an inclined surface that descends toward the outlet portion.