WO2012093786A2

WO2012093786A2 - Stirling cycle-based heat engine system

Info

Publication number: WO2012093786A2
Application number: PCT/KR2011/009830
Authority: WO
Inventors: 신국선
Original assignee: Shin Gook-Sun
Priority date: 2011-01-07
Filing date: 2011-12-20
Publication date: 2012-07-12
Also published as: KR20120080522A; WO2012093786A3

Abstract

The present invention relates to a Stirling cycle-based heat engine system which can utilize various types of energy such as liquid fuel, gas fuel, solid fuel, waste heat from power plants and factories, geothermal energy, solar energy, and the like as power sources to overcome the problems of a Stirling engine. The Stirling cycle-based heat engine system (10) includes a pumping unit (20), a driving unit (30), and a connection line (50). A heat medium may flow in one direction through the pumping unit (20), the driving unit (30) and the connection line (50) connecting the pumping unit (20) to the driving unit (30) to flow to the outside (or in a closed circuit through circulation). Thus, heat exchange bottlenecking which occurs in heat engine systems according to a related art may be prevented, and also, a limited heat exchange area may be relatively freely expanded. In addition, the flow of the heat medium may be formed without cooling to operate a driving body such as an engine.

Description

Stirling cycle based heat engine system

The present invention relates to a heat engine system based on the Stirling cycle, and more particularly, to a problem of a Stirling engine capable of applying various energies such as liquid fuel, gas fuel, solid fuel, waste heat of a power plant and a plant, geothermal heat and solar power as a power source. The present invention relates to a Stirling cycle-based heat engine system that improves the efficiency of freely obtaining abundant heat sources and facilitates operation at relatively low temperatures.

Growing global consensus on the need for environmental protection is increasing the demand for green growth. In addition, such green growth requires high utilization of (new) renewable energy, which is being studied in various fields such as solar power, wind power, hydropower, and biomass.

On the other hand, the present inventors have become more practical due to the rise of the high oil price with the rise of environmental pollution problems, and in the utilization of new and renewable energy, not only can use gas fuel and solid fuel with liquid fuel of petroleum, but also power plants and Interested in the Stirling Engine, which is expected to be able to apply various energy sources such as waste heat, geothermal heat and solar heat of the plant.

1 is a view for explaining a conventional Stirling engine.

Referring to FIG. 1, a Stirling engine seals a working gas such as hydrogen or helium in a space consisting of a cylinder and a piston, heats it outside of the heating unit, and cools it outside of the cooling unit to move the piston up and down to obtain mechanical energy. External Combustion Engine.

However, such a general Stirling engine has a heat and coolable area concentrated in a cylinder, making it difficult to take any heat source, and it is difficult to receive a large amount of energy in a limited heating and cooling area, and it must be cooled, so efficiency is high. There is a problem that the temperature of the system must be relatively high due to the deterioration and cooling problem.

On the other hand, US Patent Publication No. 4,044,559 "ROTARY CLOSED SERIES CYCLE ENGINE SYSTEM" is to allow the rotor (vane) is installed around the drive shaft (eccentric) in the housing eccentrically coupled, this housing The hot side manifold and the cool side manifold are coupled to the heated gas into the housing through the heated side manifold, and the rotor is rotated while pushing the vanes through the cooling side manifold. A technique for rotating the drive shaft engaged with the rotor by an externally flowing operation is proposed.

However, such a Stirling engine according to the prior art heats half of the pipe length, and half of the pipe is cooled, but there is no device in the middle so that the pressure on the heating side is transmitted to the cooling side as it is (cooling and heating are performed on the same pipe). Therefore, the total pressure in the pipe does not change. Therefore, the pressure difference does not occur even at the inlet or outlet of the vane side has a problem that can not be operated in principle can not be rotated. Of course, in this state, even if the pipe is twisted intricately does not rotate.

In addition, the Republic of Korea Patent Registration No. 10-0454814 "scroll type heat exchange system that can be used as a Stirling engine or a freezer" and No. 10-0849506 "scroll type Stirling cycle engine" has two scroll mechanisms (spiral screw Compression mechanism) is proposed, but this technique also needs to be heated or cooled only in the helical part of the compression part and the expansion part like a general Stirling engine. Therefore, such a prior art has to maximize the external area of the compression part or the expansion part for efficient heat transfer for heating and cooling, but there is a limit in increasing the area, and thus, the general Stirling engine is a method of obtaining and dissipating heat. It is no different from.

Therefore, the present invention has been proposed to solve the above problems of the prior art, and a new type of the stirling cycle-based heat engine system according to the prior art to remove the bottleneck of the heat exchange has a new type to provide a stable operation It is an object to provide a heat engine system based on a Stirling cycle.

It is also an object of the present invention to provide a new type of stirling cycle based heat engine system capable of relatively freely expanding a relatively limited heat exchange area compared to the stirling cycle based heat engine system according to the prior art.

In addition, the present invention provides a new technology that enables the engine to operate with the application of either component of cooling or heating by improving the prior art Stirling cycle based heat engine system which requires components for cooling and heating. It is an object of the present invention to provide a heat engine system based on a stirling cycle.

According to a feature of the present invention for achieving the above object, in the Stirling cycle-based heat engine system, has a cavity 21 of a predetermined volume (A1) in which the heat medium is accommodated, and in the inner space 21 A pumping unit 20 operated by inflow and outflow heat medium; An internal space 31 of the predetermined volume A2 in which the heat medium is accommodated is formed larger than the volume A1 of the internal space 21 of the pumping unit 20, and flows in and out of the internal space 31. A driving unit 30 operated by a heating medium to be used; The internal space 21 of the pumping unit 20 and the internal space 31 of the driving unit 30 communicate with each other so that the internal space 21 of the pumping unit 20 and the internal space of the driving unit 30 ( 31) comprising a connection line 50 which enables flow of the heat medium to each other; The flow of heat medium in one of the inner space 21 of the pumping unit 20 and the inner space 31 of the driving unit 30 is formed by a heat source applied to the connection line 50 from the outside. After the interlocking operation, the heat medium flows into the inner space (the one of the internal space 21 of the pumping unit 20 and the internal space 31 of the driving unit 30) into which the heat medium is introduced. At the same time, the external heat medium flows into the internal space (the remaining one of the internal space 21 of the pumping unit 20 and the internal space 31 of the driving unit 30) in which the heat medium flows out, thereby acting from the outside. The heat medium is formed by the heat source to enable the operation of the pumping unit 20 and the driving unit 30.

In such a Stirling cycle-based heat engine system according to the present invention, the pumping unit 20 and the driving unit 30 are applied to a cylinder type, so that the pumping unit 20 has an internal space 21 of the pumping unit 20. And a first cylinder piston 24 installed to reciprocate in the first cylinder case 22 forming a), wherein the drive unit 30 forms an internal space 31 of the drive unit 30. And a second cylinder piston 34 which is installed to reciprocate in the second cylinder case 32, and is installed to be connected between the first and

second cylinder pistons

24 and 34. It may be further provided with a link unit 40 to allow the two-

cylinder pistons

24 and 34 to operate synchronously.

In such a Stirling cycle-based heat engine system according to the present invention, the connection line 50 is provided with a first flow control valve 52 at a side connected to the inner space 21 of the first cylinder case 22. A second flow control valve 54 is installed at a side connected to the internal space 31 of the second cylinder case 32, a first connection line 50 'on which a heat source for heating is applied, and the second The third flow control valve 56 is installed on the side of the first cylinder case 22 connected to the internal space 21, and the fourth side of the first cylinder case 22 is connected to the internal space 31 of the second cylinder case 32. The flow control valve 58 is installed and has a second connection line 50 "through which a heat source for cooling is applied, so that the heat medium circulates into the first connection line 50 'and the second connection line 50". To achieve a closed circuit.

In the heat engine system based on the Stirling cycle according to the present invention, the pumping unit 20 and the driving unit 30 have a vane driving method, so that the pumping unit 20 has an internal space of the pumping unit 20. A vane 25 is provided in the first vane housing 22 'forming the 21 and has a first rotor 24' which is eccentrically coupled to the first rotating shaft 26, and the drive unit The vane 35 is disposed around the inside of the second vane housing 32 ′ which forms the internal space 31 of the drive unit 30, and is eccentrically coupled to the second rotation shaft 36. 2 rotors 34 ', and when using a heat source for heating the heat medium as a heat source, the heat medium flows into the inner space 21 of the first vane housing 22' and is connected to the first line through the connection line 50. Flow into the inner space 31 of the two-vane housing 32 'and flows outward, When a heat source for cooling the heat medium is used, the heat medium flows into the internal space 31 of the second vane housing 32 ′ and the internal space of the first vane housing 22 ′ through the connection line 50. 31), the flow of heat medium can be formed and operated by a heat source acting from the outside.

In the heat engine system based on the Stirling cycle according to the present invention, a heat source for heating the connection line 50 is applied, and a heat medium flows from the inner space 21 of the first vane housing 22 ′. A first connection line 50 'connected to the first vane housing 22' and the second vane housing 32 'so as to flow into the internal space 31 of the housing 32', and a heat source for cooling acts. The first vane housing 22 'and the first vane housing 22' are formed such that a heat medium flows from the internal space 31 of the second vane housing 32 'and flows into the internal space 21 of the first vane housing 22'. A second connection line 50 "is connected to the two vane housing 32 'so that the heat medium can be circulated to the first connection line 50' and the second connection line 50" to form a closed circuit. have.

According to the Stirling cycle-based heat engine system according to the present invention, it is possible to freely obtain abundant heat source to reduce the size of the engine and very high utility. In addition, since the cooling to generate power is not necessary, the efficiency of the system is high and the operation is smooth even at a relatively low temperature. In addition, the low temperature of the system facilitates the cost and maintenance of the lubrication system. In particular, the heat engine system based on the Stirling cycle according to the present invention is such that the heat medium flows in one direction through the connection line 50 connecting the pumping unit 20 and the driving unit 30 to the outside (or closed circuit through circulation). Therefore, the bottleneck of the heat exchange does not occur as in the prior art. In addition, since the heat source can be applied to the connection line 50, which can be configured in a relatively long length and various forms, it is possible to expand the relatively limited heat exchange area relatively freely compared to the stirling cycle-based heat engine system according to the prior art. . In addition, when the working medium is discharged to the outside, the engine can be operated by the application of only one heat source during cooling or heating.

1 is a view for explaining a conventional Stirling engine;

2 is a view for explaining a heat engine system based on the Stirling cycle according to the spirit of the present invention;

3 is a view for explaining the principle of the Stirling cycle-based heat engine system according to the present invention;

4 is a view for explaining the operating state of the Stirling cycle-based heat engine system according to the present invention;

5 is a graph for explaining the volume change and the relationship between the volume change and the pressure of the heat engine system based on the Stirling cycle according to the present invention;

6 is a view for explaining a Stirling cycle based heat engine system according to a preferred embodiment of the present invention;

FIG. 7 is a graph showing pressure diagrams of a pumping unit, a connecting line and a driving unit of the Stirling cycle based heat engine system shown in FIG. 6; FIG.

FIG. 8 is a graph showing the gain diagram of the work in the pumping unit, connection line and drive unit of the Stirling cycle based heat engine system shown in FIG. 6; FIG.

9 is a view for explaining a Stirling cycle based heat engine system according to another embodiment of the present invention;

10 is a view for explaining a Stirling cycle-based heat engine system according to another embodiment of the present invention;

11 is a view for explaining a Stirling cycle-based heat engine system according to another embodiment of the present invention;

12 is a view for explaining a Stirling cycle based heat engine system according to another preferred embodiment of the present invention;

FIG. 13 is a diagram for describing a Stirling cycle based heat engine system according to another exemplary embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 6 and 13, and like reference numerals denote like elements for performing the same functions in FIGS. 2 to 13. On the other hand, in each drawing, in general with respect to the Stirling engine, a detailed description of a technology easily applied by those skilled in the art from the related art in this field will be omitted. In addition, although the size ratio between elements is somewhat different in the drawings of the drawings, or the size between the parts that are coupled to each other is expressed differently, the representation differences in such drawings are easily understood by those skilled in the art. The descriptions are omitted since they are possible parts.

6 is a view for explaining a stirling cycle-based heat engine system according to a preferred embodiment of the present invention. Here, Figure 6 (a) is a view showing the initial position state of the first cylinder piston 24 and the second cylinder piston 34, Figure 6 (b) is an intermediate position state, Figure 6 (c) Is a view showing a position state where the first cylinder piston 24 has reached the top dead center. 9 is a view for explaining a Stirling cycle based heat engine system according to another preferred embodiment of the present invention, and FIG. 10 is a view for explaining a Stirling cycle based heat engine system according to another preferred embodiment of the present invention. Drawing. Here, the sterling cycle-based heat engine system 10 according to the preferred embodiment of the present invention shown in Figures 6, 9 and 10 shows an example configured by applying a cylinder method, the example shown in Figure 6 is applied to the heating heat source In this case, FIG. 9 shows a case where a cooling heat source is applied, and FIG. 10 shows a case where both a heating heat source and a cooling heat source are applied.

Referring to FIG. 6, a sterling cycle based heat engine system 10 according to a preferred embodiment of the present invention includes a pumping unit 20, a driving unit 30, and a connection line 50, so that the pumping unit 20 is provided. The heat medium (gas, typically air) flows in one direction through the drive unit 30 and the connection line 50 connecting them to the outside (or closed circuit through circulation).

At this time, the pumping unit 20 has an internal space 21 (cavity) of a predetermined volume A1 in which the heat medium is accommodated, and is operated by the heat medium flowing in and out of the internal space 21. In addition, the drive unit 30 has an internal space 31 (cavity) of the predetermined volume A2 in which the heat medium is accommodated, and is formed larger than the volume A1 of the internal space 21 of the pumping unit 20, and the internal space ( It is operated by the heat medium flowing in and out of 31).

In this embodiment, the pumping unit 20 and the driving unit 30 are cylinder type. Accordingly, the pumping unit 20 has a first cylinder piston 24 which is installed to reciprocate in the first cylinder case 22 forming the inner space 21 of the pumping unit 20. In addition, the drive unit 30 has a second cylinder piston 34 which is installed to reciprocate in the second cylinder case 32 forming the internal space 31 of the drive unit 30. In addition, the link unit 40 is installed between the first and

second cylinder pistons

24 and 34 so that the first and

second cylinder pistons

24 and 34 are connected to each other so as to have a synchronized operation with each other. This allows for more stable operation while reducing peripherals including sensors, valves and the like.

In addition, in the Stirling cycle-based heat engine system 10, the connection line 50 allows the internal space 21 of the pumping unit 20 and the internal space 31 of the driving unit 30 to communicate with each other. The heat medium is allowed to flow between the internal space 21 of the 20 and the internal space 31 of the drive unit 30. In the present embodiment, the first to fourth flow control valves 52 are installed on the connection line 50 to control the flow of the heat medium (air). That is, the connection line 50 is provided with a first flow control valve 52 and a third flow control valve 56 on the side connected to the internal space 21 of the first cylinder case 22, the second cylinder The second flow control valve 54 and the fourth flow control valve 58 are provided on the side connected to the internal space 31 of the case 32, and a heat source (heating heat source) for heating is applied.

On the other hand, in the present embodiment, the link unit 40 is connected to the first and

second cylinder pistons

24 and 34 and the link 44 to enable the pivoting movement, and is coupled to a rotating shaft (not shown) through which power is output. By installing the flywheel 42 so that the rotational force is accumulated, the movement of the first and

second cylinder pistons

24 and 34 consisting of the steps (a), (b) and (c) of FIG. 6 is performed smoothly. do.

On the other hand, the heat engine system 10 based on the Stirling cycle shown in FIG. 9 shows a case in which a cooling heat source is applied while having the same configuration as that of FIG. 6, and the first cylinder case 22 and the driving unit of the pumping unit 20 are applied. A cooling heat source is applied to the second connecting line 50 "connecting the second cylinder case 32 of 30. The heat engine system 10 based on the Stirling cycle shown in Fig. 10 is shown in Figs. There is a difference that is configured to use the heating heat source and cooling heat source applied at the same time.

In the heat engine system 10 based on the Stirling cycle according to FIGS. 7 and 10, the pumping unit 20 is provided with first and third

flow control valves

52 and 56 for inducing one-way movement of the heat medium. These first and third

flow control valves

52, 56 may be comprised of check valves or valves actuated by cams. When the first cylinder piston 24 of the pumping unit 92 is compressed, the lower third flow control valve 56 is closed to increase the internal pressure, so that the upper first flow control valve 52 automatically opens and air Is moved to the first connection line 50 '. In addition, second and fourth flow control valves 54 and 58, which are operated by a cam, are installed on the driving unit 30 side, and when the air is inflated, the air coming from the first connection line 50 'is driven. It is possible to enter into the second cylinder case 32 of the (30), when exhausting the air coming from the first connecting line 50 'is cut off, the air in the second cylinder case 32 of the drive unit 30 It is driven to send to outside. At this time, the second and fourth flow control valves 54 and 58 are interlocked by a cam to control the amount of air entering the drive unit 30, or are opened and closed through a separate automatic control device, but the closing time is a connection line. It is set based on the measured pressure of 50, the temperature and the volume in the connecting line 50.

Meanwhile, the second cylinder piston 34 of the drive unit 30 may be at the top dead center in the adiabatic expansion process, which is a method in which the drive unit 30 operates in the heat engine system 10 based on the Stirling cycle according to the present embodiment. When the air temperature is high, the temperature of the air is lowered as the piston 34 is pushed out. If the outer wall of the second cylinder case 32 is cold, before the second cylinder piston 34 is pushed out, It cools down. As the air cools down in advance, the air cannot be exerted to the end of the cylinder because the volume is low, resulting in heat loss through the outer wall of the cylinder. Thus, the second cylinder Such a loss can be reduced by heat-insulating the case 32.

FIG. 7 is a graph showing pressure diagrams of a pumping unit, a connection line, and a driving unit of the Stirling cycle-based heat engine system shown in FIG. 6, and FIG. 7A illustrates an internal space 21 of the pumping unit 20. 7 (b) is a graph showing a change in pressure of the first connection line 50 ′ to which the heating heat source is applied, and FIG. 7 (c) is a view of the drive unit 30. It is a graph showing the pressure change in the internal space 31. FIG. 8 is a graph showing a gain diagram of work in the pumping unit, the connection line, and the driving unit of the Stirling cycle based heat engine system shown in FIG. 6, and FIG. 8A is a side of the pumping unit 20. 8 is a graph showing a change in the amount of work, Figure 8 (b) is a graph showing a change in the amount of work on the drive unit 30 side, Figure 8 (c) is a heat engine system 10 based on the Stirling cycle Is a graph showing the amount of work obtained on the basis of the amount of work on the driving unit 30 side-the amount of work on the pumping unit 20 side.

Referring to FIG. 7, the reason why the pressure in the middle portion of the pumping unit 10 does not increase above the maximum pressure as shown in FIG. 7A is equal to the pressure in the connection line 50 such that air is connected to the connection line 50. This is because the process is moved into. As shown in FIG. 7B, the pressure in the connection line 50 is always maintained at an appropriate pressure during the heating. As shown in FIG. 7C, the pressure in the connecting line 50 is transmitted until the pressure of the driving unit 30 is closed until the first flow control valve 52 of the expansion unit 20 is closed. After the transfer, when the first flow control valve 52 closes and fully inflates, the transfer amount is naturally limited to the atmospheric pressure. In this case, the first flow control valve 52 is closed at about the middle of the cylinder stroke. Here, the graph shown in FIG. 7 is a pressure change diagram in the case where the volume in the connecting line 50 is moderately larger than the volume of the cylinder (when the graph is satisfied).

8 is a diagram showing the magnitude of the force by multiplying the cross-sectional area of the piston by the pressure value of FIG. Since the cross-sectional area of the driving unit 30 as shown in FIG. 8 (b) is larger than that of the pumping unit 20 as shown in FIG. 8 (a), a force difference as shown in FIG. 8 (c) occurs. Subtracting the energy required by the pumping unit 20 from the energy generated by the drive unit 30 is the amount of the engine converted from heat to kinetic energy.

11 is a view for explaining a Stirling cycle-based heat engine system according to another preferred embodiment of the present invention, Figure 12 is a view for explaining a Stirling cycle-based heat engine system according to another preferred embodiment of the present invention 13 is a view for explaining a Stirling cycle-based heat engine system according to another preferred embodiment of the present invention.

11 to 13, the Stirling cycle-based heat engine system 10 according to the present embodiment is under the technical concept of the present invention, which is equivalent to the above-described cylinder type, which applies a vane type driving device. For example, the inventor has proposed a vane-type sterling engine through International Patent Application No. PCT / KR2010 / 008782 "Rotary Stirling Engine for Green Growth," according to the present invention. 10 may be configured by applying the vane type driving method proposed in various ways to the pumping unit 20 and the driving unit 30. Therefore, the characteristics of the stirling cycle-based heat engine system 10 according to the present embodiment are the same as those of the cylinder type of the above-described embodiment.

The Stirling cycle-based heat engine system 10 according to the present embodiment is the same as the above-described cylinder type in basic operation, but a vane type driving type is applied. That is, the stirling cycle-based heat engine system 10 according to the present embodiment has a drive unit 30 rather than the volume of the pumping unit 20 when one stroke is performed based on the pumping unit 20 as in the above-described example. The total volume of is necessarily configured to be large.

In addition, since the vane-type driving method is applied to the heat engine system 10 based on the Stirling cycle according to the present embodiment, each

vane

25 and 35 of the first rotor 24 ′ and the second rotor 34 ′ is applied. Acts as a valve, so the above-described cylinder type and moon do not need a valve for controlling. Of course, the automatic control valve may be installed on the input side of the drive unit 30 for the automatic control of the system.

Again, referring to FIGS. 11 to 13, the Stirling cycle based heat engine system 10 according to the present embodiment includes a pumping unit 20, a driving unit 30, and a connection line 50. 20), the heat medium (gas, typically air) flows in one direction through the drive unit 30 and the connection line 50 connecting them to operate to the outside (or closed circuit through the circulation).

At this time, the pumping unit 20 has an internal space 21 (cavity) of a predetermined volume A1 in which the heat medium is accommodated, and is operated by the heat medium flowing in and out of the internal space 21. In addition, the drive unit 30 has an internal space 31 (cavity) of the predetermined volume A2 in which the heat medium is accommodated, and is formed larger than the volume A1 of the internal space 21 of the pumping unit 20, and the internal space ( It is operated by the heat medium flowing in and out of 31). In addition, the connection line 50 allows the internal space 21 of the pumping unit 20 and the internal space 31 of the driving unit 30 to communicate with each other so that the internal space 21 of the pumping unit 20 and the driving unit ( The internal space 31 of 30) allows the flow of the heat medium to each other.

In this embodiment, the pumping unit 20 and the driving unit 30 are applied with a vane type driving method. Accordingly, in the pumping unit 20, the vanes 25 are circumferentially installed in the first vane housing 22 ′ forming the internal space 21 of the pumping unit 20 so as to be eccentric to the first rotation shaft 26. It has a first rotor 24'to be engaged. In the drive unit 30, the vanes 35 are circumferentially installed in the second vane housing 32 ′ forming the internal space 31 of the drive unit 30 so as to be eccentric to the second rotation shaft 36. It has a second rotor 34 'that is coupled.

In this case, as shown in FIGS. 11 and 13, when using a heat source for heating the heat medium as the heat source, the heat medium flows into the inner space 21 of the first vane housing 22 ′ and the second vane through the connection line 50. It flows into the inner space 31 of the housing 32 'and flows outward. 12 and 13, when using a heat source for cooling the heat medium as a heat source, the heat medium flows into the internal space 31 of the second vane housing 32 ′ and is connected to the first line through the connection line 50. By flowing into the inner space 31 of the vane housing 22 'and flowing to the outside, the flow of the heat medium is formed by the heat source acting from the outside to enable the operation.

Accordingly, as shown in FIG. 11, in the Stirling cycle-based heat engine system 10 in which a heating heat source and a cooling heat source are applied at the same time, a first connection line 50 ′ is applied to the connection line 50. The line 50 'is connected to the first vane housing 22' such that the heat medium flows from the inner space 21 of the first vane housing 22 'and flows into the inner space 31 of the second vane housing 32'. It is connected to the second vane housing 32 '. As shown in FIG. 12, when a cooling heat source is applied, a second connection line 50 ″ is applied to the connection line 50, which is connected to the second vane housing 32. Is connected to the first vane housing 22 'and the second vane housing 32' so that the heat medium flows from the inner space 31 of the ') to flow into the inner space 21 of the first vane housing 22'. 13, when the heating heat source and the cooling heat source are used at the same time, the first connection line 50 ′ and the second connection line 50 ″ described above are simultaneously applied, and the heat medium is applied to the first connection line ( 50 ') and the second connection line 50 "to form a closed circuit.

Such a Stirling cycle-based heat engine system 10 according to the present embodiment is a reversible process is established, such as a general Stirling engine or an external combustion engine, can be used as a heat pump or forced heat exchanger if necessary.

Such a stirling cycle-based heat engine system 10 according to the present embodiment further includes a starter to determine the operation direction of the pumping unit 20 and the drive unit 30, which is a cylinder type device This is because a problem may occur when one of the devices connected to it has to rotate in a constant direction when it is stopped to rotate in the opposite direction than when it is stopped at the top dead center and the bottom dead center. Indeed, the present invention alone does not matter in which direction the structure rotates.

On the other hand, the technology proposed in the general Stirling engine and the Republic of Korea Patent Registration No. 10-0454814 should be directly heated or cooled the compressor and the expander, but the sterling cycle-based heat engine system 10 according to the present embodiment is pumped The unit 20 or the drive unit 30 is heated or cooled via a connection line 50 connecting them without direct heating. Therefore, the Stirling engine according to the prior art has a fatal weakness that heat exchange should be performed only in a limited area, but the present invention can completely extend the heat exchange area without any limitation from this restriction, and thus the volume of the connecting line 50 is increased in the system. Not only does it interfere with operation, it also reduces pulsation and improves thermal efficiency because it is in adiabatic compression.

Moreover, while such a prior art requires cooling as a main means for obtaining power, the present invention does not require cooling at all for this purpose. Thus, the present invention can significantly lower the overall temperature of the system. In other words, the gas may be circulated quickly so that the temperature of the system does not rise when the same heat source is used. If you want the gas to circulate quickly, you can either run it at a higher speed or increase the volume of each device. It is not desirable to operate at high speeds because the generation of vibration and noise is large, and it is reasonable to increase the volume of the device.

In addition, such a prior art does not operate unless a closed circuit is formed, but the present invention is based on the operation in a non-closed state. In the case of Patent No. 10-0454814, a preheater, a cooler, and a regenerator are required to increase the efficiency of an engine, but an exhaust control device is required in the present invention.

In addition, this prior art uses the same volume of compressor and expander or cylinder, but the present invention uses pumping unit 20 and drive unit 30 with different volumes, but the volume is one cycle of pumping unit 20. As a reference, not only the volume of the drive unit 30 is necessarily large, but also the use thereof is different. That is, the general Stirling engine generates half of the power while cooling in the cooling unit and generates half the power while heating in the heating unit, but the pumping unit 20 pumps only the pumping unit 20 based on the Stirling cycle based on the present invention. The driving unit 30 is clearly divided in roles so as to drive only.

In addition, Patent No. 10-0454814 has a first connecting pipe and a second connecting pipe connecting the compressor and the expander, but it is only available as a means of transporting gas, so even if the heating and cooling of the diarrhea has no effect on the system. Does not reach. However, the present invention uses a similar connection pipe (connection line 50) for heating and cooling, so the role of the pipe is not only completely different, but also the core of the present invention.

In addition, in the prior art as described above, the two cylinders or the rotating parts of the compressor and the expander must be mechanically connected, but the present invention does not necessarily connect the pumping unit 20 and the driving unit 30 so that they can be completely separated. . Of course, at this time, a sensor for measuring the temperature and pressure of the air in the connection line 50 to which the heating or cooling heat source is applied is added, and the input valve of the drive unit 30 measures the measured temperature and pressure and the connection line 50. This is because the amount of air discharged can be controlled by adjusting the closing timing or position based on the volume.

As described above, the Stirling cycle-based heat engine system according to a preferred embodiment of the present invention has been shown in accordance with the above description and drawings, but this is merely described for example and various within the scope without departing from the spirit of the present invention. It will be understood by those skilled in the art that variations and modifications are possible.

2 is a view for explaining a heat engine system based on the Stirling cycle according to the spirit of the present invention.

Referring to FIG. 2, the Stirling cycle-based heat engine system 10 according to the present invention includes a pumping unit 20, a driving unit 30, and a connection line 50, thereby providing a volume A2 of the driving unit 30. ) Is larger than the volume A1 of the pumping unit 20, and the heat medium (gas, typically air) flows in one direction through the connecting line 50 connecting the pumping unit 20 and the driving unit 30. (Or closed circuit through the circulation), so that the heat exchange system has a bottleneck of heat exchange in the prior art and relatively freely expand the limited heat exchange zone, without cooling It builds up the flow so that it can actuate a drive such as an engine. For example, the Stirling cycle-based heat engine system 10 according to the present invention may apply a heat source (heating source) for heating the heat medium as a preferred embodiment of the present invention shown through FIGS. 6 and 11 as a heat source, A heat source (cooling heat source) for cooling the heat medium may be applied as in the preferred embodiment of the present invention shown in FIGS. 9 and 12, and a heating heat source as in the preferred embodiment of the present invention shown in FIGS. 10 and 13. Cooling heat source can be applied at the same time.

Such a stirling cycle-based heat engine system 10 according to the present invention has a volume (A2) of the drive unit 30 is formed larger than the volume (A1) of the pumping unit 20 to generate a flow of heat medium (gas) At this time, the operating force of the drive unit 30 is large because the volume between the pumping unit 20 and the drive unit 30 is different.

In the Stirling cycle-based heat engine system 10 of the present invention, the pumping unit 20 has an internal space 21 (cavity) of a predetermined volume A1 in which a heat medium is accommodated, and flows in and out of the internal space 21. It is operated by the heat medium. The drive unit 30 has an internal space 31 (cavity) of the predetermined volume A2 in which the heat medium is accommodated, and is formed larger than the volume A1 of the internal space 21 of the pumping unit 20, and the internal space 31 It is operated by the heat medium flowing in and out. Here, the pumping unit 20 and the driving unit 30, as in the preferred embodiment of the present invention, can be made by applying a cylinder type and a vane type driving method which are generally used in a Stirling engine.

In addition, in the heat engine system 10 based on the Stirling cycle of the present invention, the connection line 50 allows the internal space 21 of the pumping unit 20 to communicate with the internal space 31 of the driving unit 30. The heat medium is allowed to flow between the internal space 21 of the 20 and the internal space 31 of the drive unit 30. Since the connection line 50 can be set to various lengths and arrangements as necessary, by applying a heat source to the connection line 50, relatively limited heat exchange compared to the heat engine system based on the Stirling cycle according to the prior art. The area can be expanded relatively freely.

Such a stirling cycle-based heat engine system 10 according to the present invention is the internal space 21 of the pumping unit 20 and the internal space 31 of the drive unit 30 by a heat source acting on the connection line 50. The flow of the heating medium in any one of the directions is formed.

In addition, the heat engine system 10 based on the Stirling cycle according to the present invention allows the pumping unit 20 and the driving unit 30 to operate in conjunction with each other, and then introduces an internal space into which the heat medium flows (the inside of the pumping unit 20). The heat medium in any one of the space 21 and the internal space 31 of the drive unit 30 flows to the outside, and the internal space in which the heat medium flows out (the internal space 21 of the pumping unit 20 and the drive) By allowing the external heat medium to flow into the other one of the internal spaces 31 of the unit 30, the flow of the heat medium is formed by the heat source acting from the outside, so that the operation of the pumping unit 20 and the driving unit 30 is prevented. Make it possible. For example, when applying a heat source (heating heat source) for heating the heat medium as in the preferred embodiment of the present invention shown through FIGS. 6 and 11, the heat medium is driven in the internal space 21 of the pumping unit 20. After the first and

second cylinder pistons

24 and 34 flow into the internal space 31 of the pump), external heat medium (atmospheric pressure air) flows into the internal space 21 of the pumping unit 20, and is driven. The heat medium (air) in the internal space 31 of the unit 30 is allowed to flow out. And, when applying a heat source (cooling heat source) for cooling the heat medium as in the preferred embodiment of the present invention shown through Figs. 9 and 12, the heat medium is pumped in the internal space 31 of the drive unit 30 (20) After the first and

second cylinder pistons

24 and 34 are flowed into the internal space 21, the external heat medium (air pressure air) flows into the internal space 31 of the drive unit 30, and is pumped. The heat medium (air) in the internal space 21 of the unit 20 is allowed to flow out. Of course, when the heating heat source and the cooling heat source are applied at the same time as in the preferred embodiment of the present invention shown through FIGS. 10 and 13, the flow of the heat medium is generated at the same time.

3 is a view for explaining the principle of the Stirling cycle-based heat engine system according to the present invention, Figure 4 is a view for explaining the operating state of the Stirling cycle-based heat engine system according to the present invention. At this time, Figures 3 and 4 are applied to the configuration of the pumping unit 20 and the drive unit 30 in a cylindrical manner in order to explain the principle of the Stirling cycle-based heat engine system according to the present invention The experimental setup is shown. Thus, the experimental apparatus of FIGS. 3 and 4 is provided with a pumping unit 20, a drive unit 30 and a connection line 50 to achieve the characteristic operation of the Stirling cycle based heat engine system according to the invention. The pumping unit 20 in which the first cylinder piston 24 is installed in the internal space 21 of the first cylinder case 22, and the second cylinder piston 34 in the internal space 31 of the second cylinder case 32. The heat medium flows through the installed drive unit 30 and the connection line 50 connecting them, and an exhaust valve 1 is provided on the connection line 50 for the external discharge of the internal heat medium. And, when the cylinder system is applied, the first cylinder piston 24 and the second cylinder piston 34 through the link unit 40 so that the operation between the first cylinder piston 24 and the second cylinder piston 34 is interlocked. ) Is connected. 5 is a graph for explaining the volume change and the relationship between the volume change and the pressure change in the heat engine system based on the Stirling cycle according to the present invention. At this time, Figure 5 (a) is a volume change diagram, Figure 5 (b) is a volume pressure change diagram.

3 to 5, when the exhaust valve 1 is opened and the first cylinder and the

second cylinder pistons

24 and 34 are pushed from side to side, it is confirmed that air enters and exits through the exhaust valve 1. Can be. When air enters, pushing the first cylinder and the

second cylinder pistons

24 and 34 to the right, the total volume (the volume in the first cylinder case 22 formed by the first cylinder piston 24 and the second cylinder piston The volume in the second cylinder case 32 formed by the 34 increases, so that the outside air is pushed by the atmospheric pressure and the inside air pressure is relatively lowered. On the contrary, when the first cylinder and the

second cylinder pistons

24 and 34 are pushed to the left side, the overall volume is reduced, so that the pressure inside the cylinder is increased so that the air inside the air passes through the atmospheric pressure. The present invention is characterized by using such a phenomenon.

In addition, in FIG. 3, the position of the first cylinder and the

second cylinder pistons

24, 34 is properly in the middle and the exhaust valve 1 is closed. In this state, when the first cylinder and the

second cylinder pistons

24 and 34 are pushed in the left direction or the right direction, air cannot escape or enter, which causes a force to move the piston. Therefore, when the piston is released, the piston is returned to its original position. If the exhaust valve 1 is opened and air is forced in from the outside, the opposite phenomenon occurs, so that the first cylinder and the

second cylinder pistons

24 and 34 move to the right. The first cylinder and the

second cylinder pistons

24, 34 move to the left.

As shown in FIG. 4A, when the first cylinder and the

second cylinder pistons

24 and 34 are sufficiently pushed to the left, the exhaust valve 1 is closed and the connection line 50 is heated. The air is heated and the air is isothermally expanded. In this way, the expansion is almost the same as if blowing air from the outside. Then, if heat is continuously applied, as a result, all the air in the cylinder on the left side is transferred and heated and moved to the right side, as shown in FIG. 4B (the state in which the second cylinder piston 34 is moved to position B). } This process is a process for generating power, in the case of the preferred embodiment of the present invention shown in Figure 6 will be stored in the fly wheel 42. Some of the energy stored in this way moves the first cylinder and the

second cylinder pistons

24 and 34 to perform intake and exhaust, and again the state as shown in FIG. Is moved to A}.

Such a stirling cycle-based heat engine system 10 according to the present invention, when one cycle is completed on the basis of the pumping unit 20, the total volume of the drive unit 30 is necessarily compared to the volume of the pumping unit 20. It is characterized by enlarging. At this time, the volume ratio of the pumping unit 10 and the driving unit 30 is preferably equal to the ratio of the atmospheric pressure and the pressure that can be obtained in the connection line 50. Then, when one cycle is completed, time or position is adjusted so that air having the same mass as the mass of air input to the pumping unit 20 is input to the driving unit 30. This makes it possible to heat or cool the connection line 50 instead of directly heating the engine, freely obtaining the necessary heat source, and having a suitable heat source allows the equipment to be built and used anywhere. It's losing.

The process of FIG. 4 is completely the same as the process of expanding by receiving heat while a single cylinder has a constant volume. Thus, the method of analyzing the Stirling cycle based heat engine system 10 according to the present invention is equivalent to analyzing a single cylinder. 5 (b) shows a volume pressure change diagram for this, in which case the volume of the cylinder is relatively large compared to the volume of the connection line 50 to which the heating or cooling heat source is applied.

As shown in (b) of FIG. 5, the amount corresponding to the upper part of the atmospheric pressure is the amount changed to power by receiving energy, and there is no trace back because the air is released to the atmosphere without being used again. . However, by setting the rotational torque appropriately, it is possible to control the temperature of the exhausted air, and thus may be configured to reuse the exhausted air according to the purpose.

On the other hand, in the case of a conventional Stirling engine consisting of a closed loop, a cooling device is required, and the efficiency is determined according to the cooling performance. However, the sterling cycle-based heat engine system 10 according to the present invention basically consists of an open circuit (open circuit), and operates by directly inhaling natural cold air, thereby eliminating the burden of cooling to generate power. There is an effect of driving the engine efficiently even at a relatively low temperature.

In addition, there is no need to cool the cylinder head like a normal Stirling engine, which significantly increases the efficiency of the overall system. This is because existing systems are forced to raise the temperature of the cooling head in order to increase the cooling efficiency. In this case, the temperature of the whole system is inevitably high, which means that a lot of heat loss due to radiation occurs. Therefore, the higher the temperature, the lower the efficiency. This is a very fatal problem in the case of using solar heat, which is a problem that occurs because it is not possible to insulate the heating portion to be collected. Note that the heat loss due to radiation is calculated by the Stefan-Boltzmann law, which is by no means small. The following expression represents the Stefan-Boltzmann law.

Taking an example according to the above formula, assuming that the solar heat obtainable at 1 m 2 is 1 kW, the reflector is made 1 m 2, and it is assumed that the width of the heating head portion of the engine is 10 cm. The solar heat entering the area is 1 kW. But what if the temperature of the cooling unit is kept at 500 ° C and the temperature of the heating part is kept at 1000 ° C in order to drive the engine efficiently? When calculated according to Stefan-Boltzmann's law described above, when the radiation coefficient is 1, the energy radiated from a heating part of 100 cm 2 is 1.4 kW. Therefore, materials with very low emissivity must be selected. Even with an emissivity of 0.1, a loss of 140 W is generated, which accounts for 14% of the incoming energy. This emissivity is also proportional to the square of the absolute temperature, so it must be carefully considered when making engines at high temperatures. However, cooling is not required, and the temperature of the heating part is 500 ° C., and the emissivity is lowered to 200 W when the emissivity is 1, and 20 W when the emissivity is 0.1. If you make the same system with the same materials to produce power, the ratio of total losses will be reduced from 140W to 20W.

Therefore, the conventional solar collector type Stirling engine is very difficult to raise the efficiency more than a certain degree for the energy collected, but it is possible to prevent the increase of the temperature by speeding up the air transport of the heating pipe, thereby significantly improving the efficiency decrease. Will be. In addition, if the temperature of the system can be lowered by the temperature rise of the cooling head again, heat loss due to radiant heat can be significantly reduced, and heat can be insulated from the drive unit, thereby increasing the overall efficiency considerably.

On the other hand, since the cold air of the atmosphere is used directly, a relatively high temperature difference can be obtained and a high heat transfer rate can be obtained. This is because the heat transfer equation is proportional to the temperature difference as in the following equation.

Therefore, the stirling cycle-based heat engine system 10 according to the present invention has a remarkable effect of increasing the overall efficiency, the system temperature is not high, so the life of parts is increased, maintenance costs such as lubrication are low, and the price of equipment It also has the effect of falling.

Claims

In a sterling cycle based heat engine system,

A pumping unit (20) having an internal space (21; cavity) of a predetermined volume (A1) in which the heat medium is accommodated, and operated by the heat medium flowing in and out of the internal space (21);

An internal space 31 of the predetermined volume A2 in which the heat medium is accommodated is formed larger than the volume A1 of the internal space 21 of the pumping unit 20, and flows in and out of the internal space 31. A driving unit 30 operated by a heating medium to be used;

The internal space 21 of the pumping unit 20 and the internal space 31 of the driving unit 30 communicate with each other so that the internal space 21 of the pumping unit 20 and the internal space of the driving unit 30 ( 31) comprising a connection line 50 which enables flow of the heat medium to each other;

The flow of heat medium in one of the inner space 21 of the pumping unit 20 and the inner space 31 of the driving unit 30 is formed by a heat source applied to the connection line 50 from the outside. After the interlocking operation, the heat medium flows into the inner space (the one of the internal space 21 of the pumping unit 20 and the internal space 31 of the driving unit 30) into which the heat medium is introduced. At the same time, the external heat medium flows into the internal space (the remaining one of the internal space 21 of the pumping unit 20 and the internal space 31 of the driving unit 30) in which the heat medium flows out, thereby acting from the outside. Stirling cycle-based heat engine system, characterized in that the flow of heat medium is formed by the heat source to enable the operation of the pumping unit (20) and the drive unit (30).
The method of claim 1,

The pumping unit 20 and the drive unit 30 is a cylinder type is applied,

The pumping unit 20 has a first cylinder piston 24 which is installed to reciprocate in the first cylinder case 22 forming the inner space 21 of the pumping unit 20,

The drive unit 30 has a second cylinder piston 34 which is installed to reciprocate in the second cylinder case 32 forming the inner space 31 of the drive unit 30,

And a link unit 40 which is installed to be connected between the first and second cylinder pistons 24 and 34 so that the first and second cylinder pistons 24 and 34 operate in synchronization. Sterling cycle based heat engine system.
The method of claim 2,

The connection line 50 is provided with a first flow control valve 52 on the side connected to the internal space 21 of the first cylinder case 22, the internal space of the second cylinder case 32 ( A second flow control valve 54 is installed on the side connected to 31, a first connection line 50 'on which a heat source for heating is applied, and

A third flow control valve 56 is installed at the side of the first cylinder case 22 connected to the internal space 21, and at the side of the second cylinder case 32 connected to the internal space 31. The fourth flow control valve 58 is installed and has a second connection line 50 "to which a heat source for cooling is applied,

Sterling cycle based heat engine system, characterized in that the heat medium is circulated to the first connecting line (50 ') and the second connecting line (50 ") to form a closed circuit.
The method of claim 1,

The pumping unit 20 and the driving unit 30 is a vane type driving method is applied,

The pumping unit 20 has a vane 25 circumferentially installed in the first vane housing 22 ′ forming the internal space 21 of the pumping unit 20 so as to be eccentric to the first rotation shaft 26. Having a first rotor 24 'coupled thereto,

The drive unit 30 has a vane 35 circumferentially installed in the second vane housing 32 ′ forming the internal space 31 of the drive unit 30 so as to be eccentric with the second rotation shaft 36. Has a second rotor 34 'that is coupled,

In the case of using a heat source for heating the heat medium as a heat source, the heat medium flows into the inner space 21 of the first vane housing 22 ′ and the inner space of the second vane housing 32 ′ through the connection line 50. In the case of using a heat source for flowing to the outside 31 and cooling the heat medium as a heat source, the heat medium flows into the inner space 31 of the second vane housing 32 ′ and passes through the connection line 50. Stirling cycle-based heat engine system, characterized in that by flowing to the inner space (31) of the first vane housing (22 ') to flow to the outside, the flow of heat medium is formed and operable by the heat source acting from the outside.
The method of claim 4, wherein

A heat source for heating the connection line 50 is applied, and a heat medium flows from the internal space 21 of the first vane housing 22 ′ and flows into the internal space 31 of the second vane housing 32 ′. A first connection line 50 'connected to the first vane housing 22' and the second vane housing 32 ',

A heat source for cooling is applied, and the first vane housing is formed such that a heat medium flows from the internal space 31 of the second vane housing 32 ′ and flows into the internal space 21 of the first vane housing 22 ′. 22 'and a second connection line 50 "connected to the second vane housing 32',

Sterling cycle based heat engine system, characterized in that the heat medium is circulated to the first connecting line (50 ') and the second connecting line (50 ") to form a closed circuit.