KR101060651B1 - Linear solar power generator using self-preservation - Google Patents

Abstract

At least one solar focusing unit for focusing sunlight; A cylinder including a first transparent portion and a second transparent portion spaced apart from each other; A piston assembly including a first piston and a second piston housed in the cylinder and interconnected, wherein the first piston and the second piston comprise permanent magnets; A first actuator gas received between the cylinder and the first piston; A second working gas received between the cylinder and the second piston; And a stator between the outer wall of the cylinder and the piston assembly, wherein the solar light focused by the solar focusing unit passes through the first transparent part and the second transparent part. The piston assembly behaves reciprocally as the alternating heating of the working gas is formed on the inner wall of the cylinder, and the efficiency of providing magnetic force to the first piston and the second piston to increase the stroke distance of the piston assembly. Further comprising a reinforcing member, it is possible to maximize the stroke of the free piston, to maximize the moving speed of the free piston to provide a high efficiency linear solar power generator.

Linear Generator, Solar, Free Piston, Detent Force, Cogging Force

Description

LINEAR SOLAR GENERATOR BY USING CONSERVATIVE MAGNETIC FORCE}

The present invention relates to a linear solar power generator having excellent efficiency using self-preservation force.

Due to the depletion of petroleum resources and environmental issues, interest in alternative energy is increasing recently, and the most attention-producing part of such alternative energy is the solar energy generator.

In general, there is a method of producing electricity using solar energy and a method of directly converting sunlight into electric energy and a method of driving a generator with a heat engine using solar heat.

Photovoltaic power generation device that converts sunlight into electrical energy is a power generation device that converts solar energy directly into electricity using solar cells, and is widely used because of its long life and easy to semi-automate or automate the power generation system. have.

However, it is used in photovoltaic devices only a part of the infrared in visible light with sufficient energy of the photon, which is part of the total solar energy, photons in most long-wavelength infrared region is not used for power generation due to low energy There is a problem in that the power generation efficiency is lowered by only increasing the temperature of the solar cell.

In addition, the solar cell has a problem that the manufacturing cost is high, the power generation efficiency is less than 30%, significantly lower than the heat engine.

Therefore, research is being actively conducted on the Concentrating Solar Power (CSP) that focuses solar power and generates electricity by heat. The external combustion engine used in the solar power generation system is a Stirling Engine and a Baton. There is a turbine engine that follows the cycle (Bayton Cycle), generally solar cells have the advantage over efficiency.

Among them, a solar dish solar generator using a stirling engine has the highest power generation efficiency.

However, in the method using a turbine, water vapor must be generated in order to drive a generator by solar heat, so that the overall apparatus becomes large, complicated, and installation costs are high.

When using a stirling engine, it is made by heating the high temperature part of a stirling engine with solar heat. Stirling engine is an ideal type of external combustion engineer that seals working gas such as hydrogen or helium in the space consisting of cylinder and piston and heats and cools it externally to move the piston up and down to obtain mechanical energy. It has high thermal efficiency similar to Carno cycle, an engineer.

However, in order to drive a generator using the Stirling engine as described above, the overall device is large, complicated, and installation costs are high, high technical level is required, and maintenance is difficult, and thus it is used only in extremely limited fields.

In addition, most engines convert linear motion into rotational motion using cranks due to thermal expansion of the gas inside the cylinder. In this process, a lot of power loss occurs due to friction, and a linear engine is being developed to drive a linear generator composed of free pistons. .

However, since the heat generated from the solar light collecting unit heats the wall of the external combustion engine using THERMAL MEDIA, a high temperature cannot be obtained, so the thermal efficiency of the heat engine is limited. In order to improve the thermal efficiency, the working gas inside the heat engine must be heated and cooled for a sufficient time so that the working gas has a high enough temperature and a low temperature repeatedly, but in an external combustion engine operated by solar lamp, the gas reaches a high temperature by combustion explosion. Unlike internal combustion engines, since the temperature is continuously raised, there is a problem that expansion of the working gas occurs before reaching a high temperature, thereby lowering the efficiency of the heat engine.

That is, referring to Faraday's law as shown in the following equation.

Since the magnitude of the induced electromotive force is proportional to the rate of change of the magnetic flux, the induced electromotive force is proportional to the speed of the piston of the heat engine. However, in the prior art, as the working gas gradually expands, the movement speed of the piston is not large. Therefore, there is a problem that power generation efficiency is greatly reduced.

In addition, in a linear heat engine of a finite size, it is desirable to maximize the stroke of the piston in order to increase the efficiency. However, it is necessary to balance the force due to the pressure of the working gas acting on both ends of the free piston in the linear heat engine. This makes it difficult to increase the stroke of the piston.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a linear power generator using high efficiency solar heat.

Another object of the present invention is to provide a solar linear power generation apparatus, which is simple in structure and low in manufacturing cost and easy to maintain, unlike a conventional complex stirling engine.

It is still another object of the present invention to provide a linear generator using solar heat that maximizes the movement speed of the free piston in order to maximize the stroke of the free piston in the linear generator and also maximize the induced electromotive force.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

Linear solar power generation apparatus according to an embodiment of the present invention for achieving the above object, at least one photovoltaic focusing unit for focusing sunlight; A cylinder including a first transparent portion and a second transparent portion spaced apart from each other; A piston assembly including a first piston and a second piston housed in the cylinder and interconnected, wherein the first piston and the second piston comprise permanent magnets; A first actuator gas received between the cylinder and the first piston; A second working gas received between the cylinder and the second piston; And a stator between the cylinder and the piston assembly, wherein the solar light focused by the solar focusing unit is passed through the first transparent part and the second transparent part through the first and second actuators. Is heated in an reciprocating manner, the piston assembly moves in a reciprocating manner, and is formed on the inner surface of the cylinder, and provides an efficiency enhancing member that provides magnetic force to the first piston and the second piston to increase the stroke distance of the piston assembly. It includes more.

In addition, the permanent magnet includes a first axial magnet and a second axial magnet in which the magnetic field directions defined by the N pole and the S pole are parallel to the behavior axial direction of the piston assembly, and the magnetic field directions are opposite to each other. It is preferable.

In addition, the first axial magnet and the second axial magnet is spaced apart from each other, it is preferred to include a first radial magnet in which the magnetic field direction is perpendicular to the behavior axial direction of the piston assembly between the spaced apart.

In addition, the permanent magnet further includes a second radial magnet in a direction opposite to the first radial magnet and the magnetic direction, wherein the first axial magnet and the second axial magnet is alternately arranged a plurality of times, Preferably, the first radial magnet and the second radial magnet are alternately disposed between the first axial magnet and the second axial magnet.

In addition, the stator includes an iron core and a coil, a tooth detent force having a constant period between the iron core and the permanent magnet is formed, the period of the tooth detent force corresponding to the first piston and the second piston It is preferable that the periods of the corresponding detent forces are the same as each other.

In addition, it is preferable that the period of the tooth detent force corresponding to the first piston and the period of the tooth detent force corresponding to the second piston have a predetermined phase difference.

In addition, the efficiency enhancing member is preferably a permanent magnet.

In addition, the efficiency enhancing member is preferably formed at the end of the stator with respect to the longitudinal direction of the cylinder.

The stator may include a first stator corresponding to the first piston and a second stator corresponding to the second piston, and the efficiency enhancing member may be disposed at one end of the first stator in an end side direction of the cylinder. A first efficiency enhancing member formed at the first one and a second efficiency enhancing member formed at the other end of the first stator in the direction of the center of the cylinder; And a 2-1 efficiency enhancing member formed at one end of the second stator in the end side direction of the cylinder and a 2-2 efficiency enhancing member formed at the other end of the second stator in the center side direction of the cylinder. It is preferable to include.

In addition, when the 1-1 efficiency enhancing member provides the attraction force by the magnetic force to the first piston, it is preferable that the 2-1 efficiency enhancing member provides the attraction force by the magnetic force to the second piston.

In addition, the first transparent portion and the second transparent portion is preferably provided on both end surfaces of the cylinder.

In addition, in order to alternately transfer the sunlight transmitted from the solar focusing unit to the first transparent portion and the second transparent portion corresponding to the first transparent portion and the second transparent portion, respectively, the reflecting mirror capable of movement It is preferable to further include.

According to the linear generator using the solar heat of the present invention as described above has one or more of the following effects.

First, unlike the conventional Stirling engine, the structure is simple and easy to manufacture and maintain.

Second, it is possible to maximize the stroke of the free piston has the effect of increasing the efficiency.

Third: maximize the moving speed of the free piston has the effect of increasing the induced electromotive force.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, only the embodiments are to make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, a linear heat engine according to exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail to avoid unnecessarily obscuring the subject matter of the present invention.

1 is a perspective view schematically showing a linear power generation apparatus using solar heat according to an embodiment of the present invention.

As shown in FIG. 1, the linear power generator using solar heat according to an embodiment of the present invention includes a solar focusing unit 2000 for focusing sunlight and a power generation unit for converting focused solar heat into electrical energy ( 1000).

As a method for focusing sunlight, there may be various methods such as using a concave reflector and a method using a convex lens. In addition, the method of directly using the primary focused light and the reflector and prism may be used as the above method. There may be ways to change the focus focus.

In the present invention, in one embodiment, the first focusing is performed by using the light collecting panels 2110 and 2210 composed of concave reflectors, and an optical path for transmitting the first focused solar light to the power generation unit 1000 using the reflecting plates. Although switching units 2120 and 2220 are used, it may be used in any other way.

In addition, in the present invention, although the solar focusing unit 2000 is composed of two solar focusing apparatuses 2100 and 2200 in one embodiment, it is possible to separate the primary light focused from one condensing panel into a plurality of focal points. It is also possible to use a single solar focusing device composed of a light path switching unit that reflects, or may be composed of two or more solar focusing devices.

The power generation unit 1000 may be provided on the light collecting panels 2110 and 2210, and formed on the rear surfaces of the light collecting panels 2110 and 2210 after forming the light transmitting holes 2111 and 2211 in the light collecting panels 2110 and 2210. You may. Although the power generation unit 1000 does not have a large area covering the sun, as shown in FIG. 1, the power generation unit 1000 may be disposed on the rear surfaces of the light collecting panels 2110 and 2210.

At this time, the solar light focused by the photovoltaic holes 2111 and 2211 and the transparent portion of the power generation unit 1000 described below with reference to FIG. It is preferable to heat the working gas inside the cylinder through the transparent portion of the.

2 to 3 are conceptual views illustrating various embodiments of the solar focusing unit 2000 of the linear power generator using the solar heat according to the present invention.

As illustrated in FIGS. 2 to 3, the solar focusing apparatuses 2100 and 2200 may include light collecting panels 2110 and 2210 that are main reflecting mirrors and light path switching units 2120 and 2220 that are subreflecting mirrors. That is, the large diameter condensing panels 2110 and 2210 focus and reflect incident light from the sun, and irradiate toward the light path switching units 2120 and 2220 having smaller diameters, and the sun is reflected by the condensing panels 2110 and 2210. The light is reflected back by the solar light reflecting portions 2120 and 2220 to condense and collect the high-density solar light at a predetermined focal point.

At this time, the light collecting panels 2110 and 2210 have a parabolic or spherical curved surface to reflect toward the common focal point of the incident sunlight. The light path switching units 2120 and 2220 have different curved shapes depending on the concave or convex surfaces facing the condensing panels 2110 and 2210, and the convex elliptical surfaces when the hyperbolic surfaces are concave. Has That is, as shown in FIG. 2, when the sub-reflectors 2121 and 2221 included in the light path switching units 2120 and 2220 face the condensing panels 2110 and 2210, they are concave. As shown in FIG. 3, the case where the sub-reflectors 2122 and 2222 face the condensing panels 2110 and 2210 is a convex type.

The light collecting panels 2110 and 2210 and the sub-reflectors 2121, 2122, 2221 and 2222 may be manufactured by attaching glass mirrors having high reflectivity to a plate-shaped steel plate structure (not shown) or directly made of aluminum having high reflectance. have.

As described above, light collecting holes 2111 and 2211 are formed in the light collecting panels 2110 and 2210, and sunlight reflected by the sub-reflectors 2121, 2122, 2221 and 2222 passes through the light emitting holes 2111 and 2211. By focusing on the focus located on the rear of the light collecting panels (2110, 2210).

Therefore, it is preferable that the transparent portion included in the power generation unit 1000 matches the back focus of the light collecting panels 2110 and 2210.

In addition, in order to provide alternatingly focused sunlight to each transparent portion formed in both ends of the power generation unit 1000, the light path switching units 2120 and 2220 may include sub-reflecting mirrors 2121 and 2122 corresponding to the transparent portions, respectively. It is preferable to include a driving unit (not shown) for moving the focus by operating 2221, 2222.

In another method, the light path switching units 2120 and 2220 include light blocking units (not shown) on the front of the sub-reflection mirrors 2121, 2122, 2221, and 2222 to collect condensed sunlight provided to each of the transparent units. Alternately block.

Any method other than the above-described method of alternately providing the sunlight condensed on the transparent portions by the light path switching units 2120 and 2220 may be used.

4 to 12, the linear power generation apparatus according to an embodiment of the present invention will be described in detail as follows.

In the present invention, the solar energy is transmitted to the working gases 1510 and 1520 through the transparent portions 1110 and 1120. Hereinafter, the linear power generator will be described with an example of the power generator 1000 in the solar power generator including the transparent parts 1110 and 1120.

In the linear power generation apparatus described below, the inner working gas 1510 and 1520 of the linear power generation apparatus using a separate external heat source without using the solar focusing unit 2000 and the transparent unit 1110. 1120 described above. It can also supply energy.

4 is a perspective view of a power generation unit according to the present invention, FIG. 5 is an exploded perspective view of a piston assembly housed in the power generation unit, FIG. 6 is a cross-sectional view taken along line AA ′ of the power generation unit shown in FIG. 4, and FIGS. 7 to FIG. 12 is an enlarged cross-sectional view of a dotted line A region and a dotted line B region of FIG. 6 to explain an operation process of the power generation unit.

The power generation unit 1000 is accommodated between the piston assembly 1400 and the cylinder and the pistons 1410 and 1420 which are accommodated in the sealed cylinder 1100 to perform reciprocating motion and are incident through the transparent parts 1110 and 1120. Actuator gases 1510 and 1520 that expand and compress by sunlight.

The actuators 1510 and 1520 include a first actuator 1510 corresponding to the first piston 1410 and a second actuator 1520 corresponding to the second piston 1420.

The actuators 1510 and 1520 are preferably a gas such as hydrogen, helium, or the like. In addition, by mixing black body powder in the actuator gas, the absorption force of energy from the sunlight transmitted from the transparent parts 1110 and 1120 is increased to the actuator gas. It can raise the heat transfer effect.

In the piston assembly 1400, the first piston 1410 and the second piston 1420 are connected by the shaft 1430, so that the first piston 1410 and the second piston 1420 behave together.

The first piston 1410 and the second piston 1420 include permanent magnets 1412 to 1418 and 1422 to 1428, and each of the pistons includes heat insulating materials 1411 and 1421 at opposite ends thereof facing each other. Block thermal energy transfer from the piston assembly 1400 to the piston assembly 1400.

The permanent magnets included in the pistons 1410 and 1420 include axial magnets in which the N pole and the S pole are disposed in parallel to the axial direction of the piston assembly 1400.

5 and 7 to 12 show an arrow in the direction of the north pole to the south pole on the permanent magnet to simplify the magnetic field direction formed around the permanent magnet.

In the first piston (1410), the axial magnets and the first axial magnets (1412, 1416) of the magnetic field direction formed in the first direction toward the first transparent portion 1110 of the axial direction of the piston assembly 1400 and The magnetic field direction includes second axial magnets 1414 and 1418 formed in a second direction opposite to the first transparent part 1110.

The first piston 1410 alternately arranges the first axial magnets 1412 and 1416 and the second axial magnets 1414 and 1418, and one first axial magnet 1412 and one second shaft. The direction magnet 1414 may be disposed.

At this time, the first axial magnets (1412, 1416) and the second axial magnets (1414, 1418) are spaced apart from each other, the spaces can be left blank, preferably containing a magnetic material corresponding to the magnetic force It may also include a focusing unit (1413, 1415, 1417).

The magnetic focusing units 1413, 1415, and 1417 may be made of iron, and may be preferably made of permanent magnets.

In the case where the magnetic focusing portions 1413, 1415, and 1417 are configured as permanent magnets, it is preferable to configure the magnetic poles 1413, 1415, and 1417 as radial magnets in which the N pole and the S pole are disposed perpendicular to the axial direction of the piston assembly 1400.

In this case, in FIGS. 5 and 7 to 12, the radial magnet is indicated as "⊙" when the outer circumferential edge of the permanent magnet is the north pole, since the magnetic field direction is the direction coming from the source, that is, the permanent magnet. In the case of the S pole, the magnetic field direction is a sink, that is, a direction into the permanent magnet.

In the first piston 1410, the radial magnet includes a first radial magnet 1415 having a magnetic field direction and a second radial magnet 1413 and 1417 having a magnetic field direction sink. do.

The radial magnet is disposed between the first axial magnet and the second axial magnet, and the first radial magnet 1415 is disposed between the N pole of the first axial magnet and the N pole of the second axial magnet. ) And second radial magnets 1413 and 1417 are disposed between the S pole of the first axial magnet and the S pole of the second axial magnet.

The first piston 1410 has a mover period τ _{m which} is a repetitive period of the first axial magnet and the second axial magnet.

Similarly, the second piston 1420 may also be configured, which will be described in detail below.

In the second piston 1420, the axial magnets are first axial magnets 1424 and 1428 in a magnetic field direction formed in a first direction opposite to the second transparent part 1120 in the axial direction of the piston assembly 1400. ) And second axial magnets 1422 and 1426 are formed in a second direction toward the second transparent part 1120.

The second piston 1420 alternately arranges the first axial magnets 1424 and 1428 and the second axial magnets 1422 and 1426, and one first axial magnet 1424 and one second shaft. The direction magnet 1422 may also be disposed.

In this case, the first axial magnets 1424 and 1428 and the second axial magnets 1422 and 1426 are spaced apart from each other, and the spaces spaced apart from each other may be empty, and preferably include a material corresponding to a magnetic force. It may also include a focusing unit (1423, 1425, 1427).

The magnetic focusing units 1423, 1425, and 1427 may be made of iron, and may be preferably made of permanent magnets.

In the case where the magnetic focusing portions 1423, 1425, and 1427 are formed of permanent magnets, it is preferable that the magnetic focusing portions 1423, 1425, and 1427 are formed of radial magnets in which the N pole and the S pole are disposed perpendicular to the axial direction of the piston assembly 1400.

In the second piston 1410, the radial magnet includes a first radial magnet 1425 having a magnetic field direction and a second radial magnet 1423 and 1427 having a magnetic field direction sink. do.

The radial magnet is disposed between the first axial magnet and the second axial magnet, and the first radial magnet 1425 is disposed between the N pole of the first axial magnet and the N pole of the second axial magnet. The second radial magnets 1423 and 1427 are disposed between the S pole of the first axial magnet and the S pole of the second axial magnet.

The second piston 1420 has a mover period τ _m , which is a repetitive period of the first axial magnet and the second axial magnet, and has a mover period of the first piston 1410 and the second piston 1420. τ _m ) is preferably the same as each other.

As described above, a halal array is formed by arranging axial magnets and radial magnets in the first piston 1410 and the second piston 1420.

The cylinder 1100 includes stator boxes 1200 and 1300 in an area corresponding to the stroke in which the pistons 1410 and 1420 reciprocate.

Each stator box 1200, 1300 includes stators 1210, 1310 including iron cores 1211, 1311 and coils 1212, 1312.

The relationship between the permanent magnets included in the stators 1210 and 1310 and the pistons 1410 and 1420 will be described in detail with reference to FIGS. 7 to 12.

7, 9 and 11 are enlarged cross-sectional views of the dotted line A in FIG. 6, for explaining the first piston 1410 and the first stator 1210, and FIGS. 8, 10, and 12 are illustrated in FIG. 6 is an enlarged cross-sectional view of the dotted line B region for explaining the second piston 1420 and the second stator 1310.

The stators 1210 and 1310 are wound around the iron cores 1211 and 1311 having the teeth of the stator period τ _s of a constant cycle and the iron cores to produce induction electromotive force to provide power to the wiring 1910 and 1920 outside the cylinder. Coils 1212 and 1312.

At this time, it is preferable that the mover period τ _m of the pistons 1410 and 1420 become a multiple of the stator period τ _s .

In addition, in the first piston 1410 and the first stator 1210, the tooth width of the stator iron core 1211 is equal to the width of the first radial magnet 1415 and the second radial magnets 1413 and 1417. Preferably, the width of the stator coil 1212 is the same as the width of the first axial magnets (1412, 1416) and the second axial magnets (1414, 1418).

Similarly, in the second piston 1420 and the second stator 1310, the tooth width of the stator iron core 1311 is equal to the width of the first radial magnet 1425 and the second radial magnets 1423 and 1427. Preferably, the width of the stator coil 1312 is equal to the width of the first axial magnets 1424, 1428 and the second axial magnets 1422, 1426.

Preferably, the lengths of the stators 1210 and 1310 are larger than the lengths of the pistons 1410 and 1420, and more preferably, the lengths of the stators 1210 and 1310 are equal to the lengths of the pistons 1410 and 1420 and the pistons 1410 and 1310. It is configured to be equal to the sum of the stroke S, which is the moving distance of 1420.

In general, when a generator or a motor does not apply current to a coil, a force that interferes with the movement of the mover is generated when the relative movement between the mover and the stator is caused by magnetic force, which is a detent force or a cogging force. The detent force is divided into a tooth detent force generated between teeth of the iron core and an end detent force generated at an end of the iron core.

In the present invention, in order to reduce the tooth detent force among the detent forces, the period (τ) of the tooth detent force by the relative behavior of the pistons 1410 and 1420 and the stators 1210 and 1310, that is, the pistons 1410 and 1420 The minimum common multiple of the stator period τ _s of the stator periods τ _m of the stator 1210 and 1310 is equal, but the period of tooth detent force by the first piston 1410 and the first stator 1210 (τ) and a main phase of the tooth detent force by the second piston 1420 and the second stator 1310 to have a predetermined phase difference ΔΦ, and more preferably, the phase difference ΔΦ is a period of the tooth detent force. It was set to 1/2 of (τ).

In the present invention, since the mover period τ _m has twice the stator period τ _s , the chi detent force period τ is the same as the stator period τ _s , and thus the phase difference ΔΦ ) Is equal to 1/2 of the stator period (τ _s ).

In general generators or motors, the end detent force is also identified as an obstacle to the movement of the mover, and there are many efforts to reduce it, and various attempts have been made, such as changing the end shape.

However, in the present invention, the efficiency is increased by increasing the stroke, which is the movement distance of the pistons 1410 and 1420, by using the end detent force, and furthermore, when the pistons 1410 and 1420 are located at the end of the stroke, that is, When the end of the first permanent magnet 1412 of the first piston 1410 is located at a1 and the end of the last permanent magnet 1428 of the second piston 1420 is located at b1, the first actuator Even if 1510 is heated, it prevents the piston from behaving until the pressure which is greater than the end detent force is generated.

Therefore, the volume change increases with the increase of the stroke, and thus the power generation efficiency is increased.

In addition, since the internal pressure rises without changing the volume until the pressure greater than the end detent force of the pistons 1410 and 1420 is formed, and the piston 1410 moves faster than the predetermined pressure, the speed of change of the magnetic flux increases. Accordingly, there is an effect to obtain a large induced electromotive force.

Hereinafter, the thermodynamic cycle will be described in detail with reference to FIGS. 13 and 14.

When the end detent force is used, the efficiency of the linear power generator according to the present invention can be increased. However, in order to further increase the efficiency of the linear power generator, the strength enhancing members 1611, 1612, 1621, 1622).

The efficiency reinforcing members 1611, 1612, 1621, and 1622 can be implemented by changing the shape of the end of the iron core, that is, increasing the size of the iron core end, and can also constitute a separate iron core.

In addition, the efficiency-enhancing members 1611, 1612, 1621, and 1622 may be implemented as magnets that form magnetic force at end portions of the iron cores of the stators 1210 and 1310, and the magnets may be permanent magnets or electromagnets.

When the efficiency enhancing members 1611, 1612, 1621, and 1622 are formed of magnets, the efficiency enhancing members 1611, 1612, 1621, and 1622 may be formed to correspond to the magnetic field directions of the permanent magnets formed at both ends of the pistons 1410 and 1420. The permanent magnet and the efficiency-enhancing member formed at both ends are more preferably formed to act on each other.

Therefore, in one embodiment of the present invention, permanent magnets having the same magnetic field direction as those of the permanent magnets formed at both ends of the pistons 1410 and 1420 are formed at both ends of the stators 1210 and 1310, respectively.

The power generation device is made to increase the stroke of the piston by using a conservative magnetic force caused by mutual attraction between the permanent magnets formed at both ends of the pistons 1410 and 1420 and the efficiency enhancing members 1611, 1612, 1621, and 1622. In addition, the efficiency of the power generation apparatus can be increased by maximizing the feed rate of the piston as the self-preservation force is large when the piston is close to the efficiency enhancing member and the self-preservation force is weakened when the piston is far away.

13 and 14 are graphs illustrating a thermodynamic cycle of a power generation unit according to the present invention, which will be described with reference to FIGS. 7 to 12.

FIG. 13 is a graph corresponding to the first piston 1410 and corresponds to the views of FIGS. 7, 9 and 11.

14 is a graph corresponding to the second piston 1420, and corresponds to the drawings of FIGS. 8, 10, and 12.

First, when the left end of the first piston 1410 is located at the left end point a1 of the first stator 1210 as in FIG. 7, the volume of the first working gas is at a minimum.

Further, as shown in FIG. 8, the volume of the second working gas when the left end of the second piston 1420 connected to the first piston 1410 is located at the left end point b1 of the second stator 1310. Is the maximum state.

At this time, the magnetic force between the 1-1 efficiency enhancing member 1611 and the first piston is the maximum, and corresponds to the state (8) in FIG. 13, and the magnetic force between the 2-2 efficiency enhancing member 1622 and the second piston. This state is maximum, and corresponds to state (8) in FIG.

Thereafter, as illustrated in FIG. 7, when the collected solar light is transmitted through the first transparent part 1110 and the first working gas is heated, the pressure of the first working gas is controlled by the 1-1 efficiency enhancing member 1611 and the first working gas. Until reaching a certain pressure that can overcome the attractive force caused by the magnetic force between the one piston, the first operating gas rapidly rises without changing the volume, and corresponds to the process from state ⑧ to state ① in FIG. .

In addition, as shown in FIG. 8, sunlight is not transmitted through the second transparent part 1120, and the second actuator gas exposed to a large area has a cooling process, and the contracting force to condense the second actuator gas is second. -2 until the pressure is reached to a certain pressure that can overcome the attraction force due to the magnetic force between the efficiency-enhancing member 1622 and the second piston, the pressure is rapidly reduced without changing the volume, Corresponds to the process from state ⑧ to state ①.

That is, the sum of the load due to the expansion force applied by the first operating gas to the first piston and the load due to the condensation force applied by the second operating gas to the second piston is caused by the magnetic force between the 1-1 efficiency enhancing member and the first piston. If the attraction force is less than the sum of the attraction force due to the magnetic force between the 2-2 efficiency enhancing member and the second piston, the piston assembly does not move to the right.

Thereafter, when the first working gas is further heated by sunlight, and the pressure of the first working gas is greater than the attractive force due to the magnetic force between the 1-1 efficiency-enhancing member 1611 and the first piston, the first piston becomes a ratio. As shown in FIG. 9, the first piston moves from point a1 to point a3 through point a2 and corresponds to a process of moving from state ① to state ③ in state 13 in FIG. 13.

At this time, the attraction force due to the magnetic force between the 1-1 efficiency enhancing member 1611 and the first piston becomes smaller as the distance between the 1-1 efficiency enhancing member 1611 and the first piston becomes smaller, so that the movement of the first piston The velocity is greater when passing a3 than after passing a2.

When the right end of the first piston 1410 is located at the right end point a5 of the first stator 1210, the magnetic force between the first 1-2 efficiency enhancing member 1612 and the first piston 1410 As the attraction force increases, the first piston 1410 has a greater movement speed in the right direction.

That is, the first piston 1410 receives a load due to the expansion of the first working gas 1510 and a load caused by the attraction force of the second efficiency-enhancing member 1612, thereby increasing the moving speed. It corresponds to the process of moving from state ③ to state ④ in 13.

In addition, when the second working gas is further cooled, and the load due to the contraction of the second working gas is greater than the attractive force due to the magnetic force between the 2-2 efficiency enhancing member 1622 and the second piston, the second piston becomes a ratio. As shown in FIG. 10, the second piston moves from point b1 to point b3 through point b2 and corresponds to a process of moving from state ① to state ③ in state ① in FIG. 14.

At this time, the attraction force by the magnetic force between the 2-2 efficiency enhancing member 1622 and the second piston becomes smaller as the distance between the 2-2 efficiency enhancing member 1622 and the second piston becomes smaller, so that the movement of the second piston The velocity is greater when passing b3 than when passing b2.

When the right end of the second piston 1420 is located at the right end point b5 of the second stator 1310, the magnetic force between the 2-1 efficiency-enhancing member 1621 and the second piston 1420 is applied. As the attraction force increases, the moving speed of the second piston 1420 increases in the right direction.

That is, as the second piston 1420 receives the load due to the contraction of the second operating gas 1520 and the load caused by the attraction force of the 2-1 efficiency-enhancing member 1641, the moving speed increases. It corresponds to the process of moving from state ③ to state ④ in 14.

The piston assembly 1400 is then moved further in the right direction so that when the right end of the first piston 1410 is located at the right end point a5 of the first stator 1210, the first actuator is at maximum. It has a volume of and corresponds to state (4) in FIG.

In addition, since the right end of the second piston 1420 is located at the right end point b5 of the second stator 1310, the second working gas has a minimum volume, and the state ④ in FIG. Corresponds to

Then, as shown in FIG. 12, when the collected solar light is transmitted through the second transparent part 1120 and the second working gas is heated, the pressure of the second working gas is reduced to the 2-1 efficiency enhancing member 1621. Until reaching a certain pressure that can overcome the attractive force caused by the magnetic force between the two pistons, the second operating gas rapidly rises in pressure without changing the volume, and corresponds to the process from state ④ to state ⑤ in FIG. .

In addition, as shown in FIG. 11, sunlight is not transmitted through the first transparent part 1110, and the first working gas exposed to a large area has a cooling process, and the contracting force to condense the first working gas is first. -2 until the pressure is reached to a certain pressure that can overcome the attractive force caused by the magnetic force between the efficiency-enhancing member 1612 and the first piston, the pressure of the first operating gas is rapidly reduced without changing the volume, Corresponds to the process from state ④ to state ⑤.

Hereinafter, since the processes from the state ⑤ to the state ⑧ in FIG. 13 and FIG. 14 proceed in the opposite directions to the processes of the first piston and the second piston, description thereof is omitted.

As shown in FIG. 13 and FIG. 14, the increase in efficiency of the present invention can be confirmed by comparing the thermodynamic cycle according to the present invention indicated by the solid line and the thermodynamic cycle when the efficiency enhancing member indicated by the dotted line is not introduced.

If the efficiency enhancing member is not included, there is no process of moving from state ⑧ to state ① and from state ④ to state ⑤, that is, no change in pressure without a change in volume, and thus low efficiency. Can be.

FIG. 15 illustrates another embodiment of the solar focusing unit according to the present invention, and illustrates that the solar focusing unit uses a Fresnel lens.

The solar light focused through the Fresnel lens 3000 heats the working fluid inside the cylinder through the transparent portion of the power generation unit.

Although the Fresnel lens has been described as an example, any optical device using a convex lens or the like may be used.

FIG. 16 illustrates another embodiment of the linear solar power generator according to the present invention. In the power generation unit 1000 described above with reference to FIGS. 4 to 12, the transparent parts 1110 and 1120 may be formed on both side cross-sections of the power generation unit. After stacking the two generators 1000 ′ arranged, the transparent parts 1111, 1121, 1112, and 1122 are configured to alternately transmit sunlight focused through the solar focusing unit according to the above-described various embodiments.

Reflectors 4210 and 4220 for transmitting sunlight to the transparent parts 1112 and 1122 of the lower power generation part disposed below the two power generation parts 1000 ′ are stacked, and the transparent parts of the upper power generation part located on the upper part ( Reflectors 4110 and 4120 are configured to transmit sunlight to 1111 and 1121.

In this case, the reflectors 4210 and 4220 corresponding to the lower power generating unit may be configured to be fixed, and the reflectors 4110 and 4120 corresponding to the upper power generating unit may be alternately behaved by a driving device (not shown). It is desirable to configure so that.

The sunlight transmitted by the solar focusing unit is reflected by the reflector 4110 on the left side of the reflectors corresponding to the upper power generation unit, and is transmitted to the left transparent part 1111 of the upper power generation unit, and among the reflectors corresponding to the upper power generation unit. The reflector 4120 on the right side is folded by the driving device so that the sunlight is not transmitted to the right transparent part 1121 of the upper power generation unit, but is reflected by the right reflector 4220 among the reflectors corresponding to the lower power generation unit and is reflected by the lower power generation unit. It is delivered to the right transparent portion 1122.

Accordingly, the upper power generating unit generates power while moving the piston assembly to the right as the working gas on the left side is heated, and the lower power generating unit generates power while moving the piston assembly to the left as the operating gas on the right side is heated.

After that, the reflectors 4110 and 4120 corresponding to the upper power generation unit are operated by the driving device, the reflector 4110 on the left side is folded, the reflector 4120 on the right side is extended, and the sunlight is reflected on the right transparent portion 1121. To be delivered.

The sunlight is not transmitted to the left transparent portion 1111 of the upper power generation portion, but is transmitted to the right transparent portion 1121, and is also transmitted to the left transparent portion 1112 of the lower power generation portion, and not to the right transparent portion 1122. Do not.

Accordingly, the upper power generation unit generates power while moving the piston assembly to the left as the working gas on the right side is heated, and the lower power generation unit generates power while moving the piston assembly to the right as the operating gas on the left side is heated. .

As described above, the upper / lower power generating units are stacked to alternately operate the reflector. However, only one power generating unit may be used, or a plurality of power generating units may be arranged in a horizontal manner.

Arranging an even number of power generation units when generating a plurality of power generation units vertically or horizontally may have an effect of mutually canceling vibrations caused by movement of the piston assembly.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

1 is a perspective view schematically showing a power generator using solar heat according to an embodiment of the present invention.

2 and 3 are side views illustrating main parts of various embodiments of the solar focusing unit.

4 is a perspective view showing an embodiment of the power generation unit.

5 is a perspective view showing an embodiment of a piston included in the power generation unit.

6 is a cross-sectional view taken along line AA ′ of FIG. 4.

7 to 12 are enlarged cross-sectional views of the dotted line A region and the dotted line B region of Figure 6 to explain the operation of the power generation unit according to the present invention.

13 to 14 is a graph showing the thermodynamic cycle of the power generation unit according to the present invention.

15 shows another embodiment of the solar focusing unit according to the present invention.

16 shows another embodiment of a linear solar power generator according to the present invention.

<Description of Symbols for Main Parts of Drawings>

1000, 1000 ': power generation unit, 1100: cylinder,

1110, 1120: transparent part, 1200, 1300: stator box,

1210, 1310: stator, 1211, 1311: iron core,

1212, 1312: coil, 1400: piston assembly,

1410, 1420: piston, 1430: shaft,

1411, 1421: insulation,

1412, 1414, 1416, 1418, 1422, 1424, 1426, 1428: axial magnets,

1413, 1415, 1417, 1423, 1425, 1427,: radial magnets,

1510: first operating gas, 1520: second working gas,

1611, 1612, 1621, 1622: efficiency enhancing member,

2000: solar focusing unit, 2110, 2210: condensing panel,

2120, 2220: light path switching unit, 3000: Fresnel lens,

1111, 1112, 1121, 1122: transparent part,

4110, 4120, 4210, 4220: reflector.

Claims (12)

At least one solar focusing unit for focusing sunlight; A cylinder including a first transparent portion and a second transparent portion spaced apart from each other; A piston assembly including a first piston and a second piston housed in the cylinder and interconnected, wherein the first piston and the second piston comprise permanent magnets; A first actuator gas received between the cylinder and the first piston; A second working gas received between the cylinder and the second piston; And A stator between the cylinder and the piston assembly; The piston assembly behaves reciprocally as solar light focused by the solar concentrator alternately heats the first and second actuators through the first and second transparent portions, And an efficiency enhancing member formed on the inner surface of the cylinder and providing magnetic force to the first piston and the second piston to increase the stroke distance of the piston assembly. The method of claim 1, The permanent magnet includes a first axial magnet and a second axial magnet in which magnetic directions defined by the north pole and the south pole are parallel to the axial directions of the piston assembly, and the magnetic directions are opposite to each other. Linear solar power generator. The method of claim 2, Wherein the first axial magnet and the second axial magnet are spaced apart from each other, and include a first radial magnet having a magnetic field direction perpendicular to the behavior axial direction of the piston assembly. Power generation device. The method of claim 3, wherein The permanent magnet further includes a second radial magnet in a direction opposite to that of the first radial magnet, The first axial magnet and the second axial magnet are alternately arranged a plurality of times, and the first radial magnet and the second radial magnet between the first axial magnet and the second axial magnet Linear solar generator, characterized in that arranged alternately. The method of claim 2, The stator includes an iron core and a coil, and a tooth detent force having a constant period is formed between the iron core and the permanent magnet, and the period of the tooth detent force corresponding to the first piston and the second piston correspond to the second piston. Linear solar power generator, characterized in that the period of the Chi detent force is the same. The method of claim 5, The period of the tooth detent force corresponding to the first piston and the period of the tooth detent force corresponding to the second piston has a predetermined phase difference. The method of claim 1, The efficiency enhancing member is a linear solar power generator, characterized in that the permanent magnet. The method of claim 7, wherein And the efficiency enhancing member is formed at an end of the stator with respect to the longitudinal direction of the cylinder. The method of claim 8, The stator comprises a first stator corresponding to the first piston and a second stator corresponding to the second piston, The efficiency enhancing member is formed on one end of the first stator of the first stator in the direction of the end of the cylinder and the other end of the first stator of the first stator in the direction of the center of the cylinder. 2 efficiency enhancing member; And A 2-1 efficiency enhancing member formed at one end of the second stator in the end side direction of the cylinder and a 2-2 efficiency enhancing member formed at the other end of the second stator in the center side direction of the cylinder; Linear solar power generator comprising a. The method of claim 9, Linear solar power, characterized in that when the 1-1 efficiency enhancing member provides the attraction force by the magnetic force to the first piston, the 2-1 efficiency enhancing member provides the attraction force by the magnetic force to the second piston. Power generation device. The method of claim 1, The first transparent portion and the second transparent portion is a linear solar power generator, characterized in that provided on both sides of the cylinder. The method of claim 11, In order to alternately transfer the sunlight transmitted from the solar focusing unit to the first transparent part and the second transparent part, the reflector corresponding to the first transparent part and the second transparent part, respectively, is movable. Linear solar power generator included.

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