JP5261473B2 - Medium temperature engine - Google Patents

Description

  The present invention relates to a medium temperature engine that performs mechanical work using medium temperature heat of 100 ° C. or less such as solar heat or waste heat from heat as a heat source.

  Conventionally proposed use of medium temperature heat of 100 ° C. or less such as solar heat is to produce hot water exclusively, and its use range is limited to hot water supply and heating. On the other hand, for example, systems disclosed in Patent Document 1 and Patent Document 2 have been proposed as systems that not only collect thermal energy from sunlight but also generate power at the same time.

  However, these systems generate power from sunlight using conversion elements such as semiconductors, and due to problems with the conversion element manufacturing costs and energy conversion efficiency, they are still in widespread use. Not in.

  On the other hand, an attempt to extract power using Rankine cycle, which is a representative methodology for extracting power from medium temperature heat, has been started. As a power generation device using Rankine cycle, for example, a device shown in Patent Document 3 Has been proposed.

  In the power generation apparatus using these Rankine cycles, if a low boiling point, such as propane, is used as a working medium to be used, a high pressure part can be obtained at medium temperature heat. However, in order to generate the differential pressure, it is necessary to secure a cooling heat source for cooling the working medium, and this point has become an obstacle and has not yet been sufficiently spread. The use of seawater or the like as a cooling heat source has been proposed, but problems such as sticking of marine organisms to the low temperature side of the heat exchanger section have arisen. Therefore, it is necessary to focus on efficiency improvement measures such as the shape of the turbine.

Thus, in the present situation, the extraction of power using medium temperature heat such as solar heat has not been sufficiently put into practical use.
JP 2007-214235 A JP 2007-278669 A JP 2005-240577 A

  As described above, there is a major obstacle to the use of power generation using the conversion element and the Rankine cycle, and the use of medium temperature heat of 100 ° C. or less such as solar heat is extended not only to hot water production but also to extraction of power. To do this, it is necessary to provide a more efficient mechanism. An object of the present invention is to provide an intermediate temperature engine that solves the above problems.

  The intermediate temperature engine according to the first aspect of the present invention includes a steam driven mechanical force take-out means driven by steam, and a volatile liquid heated at a medium temperature of 100 ° C. or less, and upstream of the steam driven mechanical force take-out means. A first driving steam generating means for generating a first driving steam for driving the steam driving mechanical force extraction means; and an ejector for sucking the first driving steam downstream of the steam driving mechanical force extraction means. And second driving steam generation means for generating a second driving steam for driving the ejector by heating the volatile liquid at a medium temperature of 100 ° C. or less, and the first driving steam after passing through the ejector. And liquefying means for liquefying the mixed steam composed of the second driving steam and returning it to the volatile liquid again, and generating the first driving steam generation means and the second driving steam generation by returning the liquefied volatile liquid to the volatile liquid. Circulated in the means Characterized in that a circulation unit that.

  According to a second aspect of the present invention, in the intermediate temperature engine according to the first aspect, the liquefaction means brings the absorption medium having a high affinity with the mixed vapor into contact with the mixed vapor after passing through the ejector. The mixed vapor is absorbed by a medium and returned to the volatile liquid.

  According to a third aspect of the present invention, in the intermediate temperature engine of the second aspect, a substance having a boiling point higher than that of the substance used for the first driving steam and the second driving steam is used as the absorption medium. The first driving steam generating means heats the absorbing medium that has absorbed the mixed steam with a medium temperature heat of 100 ° C. or less to separate the absorbing medium in a liquid state from the first driving steam. The separated first drive steam is supplied to the steam drive mechanical force take-out means, and the separated absorption medium is brought into contact with the mixed steam after passing through the ejector.

  According to a fourth aspect of the present invention, in the intermediate temperature engine according to the second aspect, a substance having a boiling point higher than that of the substance used for the first driving steam and the second driving steam is used as the absorption medium. The second driving steam generating means heats the absorbing medium that has absorbed the mixed steam at a medium temperature of 100 ° C. or less, and gas-liquid separates the second driving steam and the absorbing medium in a liquid state. The separated second driving steam is supplied to the ejector, and the separated absorbing medium is brought into contact with the mixed steam after passing through the ejector.

  The invention according to claim 5 is the intermediate temperature engine according to any one of claims 2 to 4, wherein the unabsorbed mixed steam that has not been absorbed by the absorbing medium is compressed and pre-cooled. The absorption medium is cooled in advance by the cold generated by adiabatic expansion before being brought into contact with the mixed vapor after passing through the ejector.

  The invention according to claim 6 is the intermediate temperature engine according to any one of claims 1 to 5, further comprising an intermittent injection valve mechanism that opens and closes according to the pressure of the second driving steam, It is characterized by operating the ejector intermittently.

  In addition, in claims 1 to 6, “medium temperature” means normal temperature of not less than the atmospheric temperature and not more than 100 ° C.

  According to the present invention, the first driving steam that drives the steam-driven mechanical force take-out means is generated by heating the volatile liquid at a medium temperature of 100 ° C. or less by the first driving steam generation means. Power can be taken out using medium temperature heat.

  Further, since the ejector for sucking the first drive steam is provided downstream of the steam drive mechanical force take-out means, the pressure difference between the upstream (high pressure part) and the downstream (low pressure part) of the steam drive mechanical force take-out means. And the steam-driven mechanical force take-out means can be efficiently operated to take out power.

  Further, the second driving steam for driving the ejector is also generated by heating the volatile liquid at a medium temperature of 100 ° C. or less by the second driving steam generation means, so that the medium temperature heat such as solar heat can be used. it can.

  Further, after the mixed steam composed of the first driving steam and the second driving steam after passing through the ejector is liquefied and returned to the volatile liquid again, the first driving steam generation means and the second driving steam generation means Therefore, the volatile liquid can be circulated and used effectively.

  Further, by bringing the mixed vapor after passing through the ejector into contact with an absorbing medium having a high affinity with the mixed vapor, the mixed vapor can be absorbed into the absorbing medium to be absorbed and liquefied. As a result, the pressure is reduced by removing the mixed vapor at the ejector outlet of the ejector, and the suction force of the ejector can be increased.

  Further, as the absorbing medium, a substance having a boiling point higher than that of the substance used for the first driving steam and the second driving steam is used, and an absorbing medium that has absorbed the mixed steam by the first driving steam generating means is 100. The first driving vapor separated from the first driving vapor and the liquid absorption medium by gas-liquid separation by heating at medium temperature below ℃, and the separated first driving vapor was supplied to the vapor driving mechanical force extraction means and separated Since the absorbing medium can be brought into contact with the mixed vapor after passing through the ejector, the volatile liquid and the absorbing medium can be efficiently recycled.

  Further, as the absorbing medium, a substance having a boiling point higher than that of the substance used for the first driving steam and the second driving steam is used, and an absorbing medium that has absorbed the mixed steam by the second driving steam generating means is 100. By heating with medium temperature heat below ℃ and gas-liquid separation of the second driving vapor and the absorbing medium in the liquid state, the separated second driving steam is supplied to the ejector, and the separated absorbing medium passes through the ejector Since it can be brought into contact with the later mixed vapor, the volatile liquid and the absorbing medium can be efficiently recycled.

  Moreover, the absorption effect of the absorption medium can be enhanced by cooling the absorption medium in advance before contacting the mixed vapor after passing through the ejector. It is not necessary to prepare a separate heat source by generating the cold heat for cooling by compressing and precooling the unabsorbed mixed vapor that has not been absorbed by the absorbent medium and then adiabatically expanding it.

  Further, by intermittently operating the ejector by the intermittent injection valve mechanism that opens and closes according to the pressure of the second driving steam, the energy efficiency can be increased by using the ejector driving steam having a high pressure.

  As mentioned above, according to this invention, the taking-out of the motive power using medium temperature heat of 100 degrees C or less, such as a solar heat, can be performed efficiently.

It is a lineblock diagram showing the middle temperature engine concerning an embodiment of the present invention. It is a block diagram which shows an intermittent injection valve mechanism. It is a block diagram which shows a vapor pressure drive non-absorption vapor compressor. It is a block diagram which shows a vapor pressure drive absorption medium circulation pump.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ejector 2 Air vent valve 3 Receiver tank 4 Receiver tank 5 Receiver tank 6 Safety valve 7 Piston drive steam reciprocation line 8 Piston drive steam reciprocation line 9 Piston drive steam reciprocation line 10 Absorption medium cooler 11 Absorption medium line 12 Heat insulation Expansion valve 13 Impeller-driven steam discharge line 14 Impeller-driven steam discharge line 15 Impeller-driven steam discharge line 16 Impeller for steam-driven mechanical force extraction 17 Impeller-driven steam injection line 18 Impeller-driven steam injection pipe Road 19 Impeller shaft 20 Impeller blade 21 Impeller blade 22 Impeller blade 23 Impeller blade 24 Unabsorbed steam discharge conduit 25 Jet mixer 26 Jet mixer suction port 27 Absorber 28 Ejector suction port 29 Unabsorbed Steam return pipe 35 Intermittent injection valve mechanism 36 Steam pressure driven unabsorbed steam compressor 37 Steam pressure Dynamic Absorption Medium Circulation Pump 38 Absorption Medium Return Line 40 Closure Plug 42 Ejector Driven Steam Inlet 43 Ejector Driven Steam Outlet 50 Piston Driven Steam Outlet 51 Piston Driven Steam Outlet 52 Unabsorbed Steam Inlet 53 Unabsorbed Steam Outlet 54 Absorption Medium Inlet 55 Absorption Medium outlet 63 Piston 64 Piston 71 Pressure regulating valve 72 Pressure regulating valve 73 Pressure regulating valve 74 Solar heat receiving pipe 75 Solar heat receiving pipe 76 Radiator 77 Radiator 78 Impeller driven steam generator 79 Ejector driven steam generator 81 Gas liquid Interface 82 Gas-liquid interface 83 Gas-liquid interface 84 Gas-liquid drum 85 Gas-liquid drum 86 Header 87 Header 90 Check valve 91 Check valve 92 Check valve 93 Check valve 94 Check valve 95 Check valve 96 Check valve 100 Magnet 101 Magnet 102 Magnet 103 Magnet 104 Magnet 105 Magnet 1 6 magnets 107 magnets 108 magnets 109 magnet 110 magnet

  With reference to FIG. 1, the intermediate temperature engine which concerns on embodiment of this invention is demonstrated. FIG. 1 is a configuration diagram showing an intermediate temperature engine according to an embodiment of the present invention.

  The intermediate temperature engine according to this embodiment mainly includes an impeller driven steam generator 78 (first driving steam generating means), an ejector driven steam generator 79 (second driving steam generating means), and a steam driven mechanical force take-out. An impeller 16 (steam-driven mechanical force extracting means), an ejector 1, a jet mixer 25 (liquefaction means), an absorber 27 (liquefaction means), and a vapor pressure-driven absorption medium circulation pump 37 (circulation means). The steam generated from the impeller-driven steam generator 78 rotates the steam-driven mechanical force extracting impeller 16 so that power is extracted.

In this embodiment, medium temperature heat of 100 ° C. or less obtained from solar heat is the main driving energy source. In the following, the warm temperature not lower than the atmospheric temperature and not higher than 100 ° C. is referred to as “medium temperature”.
Further, propane is used as the steam component (first driving steam) for rotating the impeller 16 for taking out the steam-driven mechanical force, propane is used as the steam component (second driving steam) for driving the ejector 1, and further, Hexane is used as an absorption medium component.

  The impeller-driven steam generator 78 includes a solar heat receiving pipe 74 and a gas-liquid drum 84. The mixed fluid (volatile liquid) of propane and hexane returned from the absorber 27 is heated to an intermediate temperature level while passing through the solar heat receiving pipe 74 and is separated into gas and liquid in the gas / liquid drum 84. A wavy line 83 in the gas-liquid drum 84 in FIG. 1 indicates a gas-liquid interface 83 in the gas-liquid drum 84. Propane is mainly separated on the gas phase side, and propane and hexane are mixed on the liquid phase side. The fluid is separated. The gas-liquid drum 84 is connected to impeller-driven steam injection pipes 17 and 18 through a pressure adjustment valve 71 and a header 86.

  The steam (propane) separated and generated by the impeller-driven steam generator 78 is taken out as steam-driven mechanical force as impeller-driven steam (first driving steam) via the impeller-driven steam injection pipes 17 and 18. It is injected into the impeller 16 for use. The steam-driven mechanical force extraction impeller 16 includes an impeller shaft 19 and impeller rotor blades 20, 21, 22, and 23, and jetted steam is transferred by the impeller rotor blades 20, 21, 22, and 23. Receiving and rotating. The motive power extracted by the steam-driven mechanical force extraction impeller 16 is directly used for mechanical work, stored in a storage battery as electrical energy via a DC generator, and used as a DC power source when converted to direct current. It can be used for various purposes, such as when it is used as an AC power source for converting and operating an AC motor.

  In the present embodiment, the impeller is used as the steam-driven mechanical force extraction means, but is not particularly limited as long as the mechanical force is extracted using the pressure difference, and other mechanisms such as a piston may be used. .

  Steam (propane) injected into the impeller 16 for taking out the steam driven mechanical force is collected in the receiver tank 5 via the impeller driven steam discharge lines 13 and 14, and further passed through the impeller driven steam discharge line 15. Via, it is sucked into the ejector suction port 28 of the ejector 1.

  On the other hand, the fluid on the liquid phase side (the mixed fluid of propane and hexane) separated by the impeller-driven steam generator 78 is supplied to the ejector-driven steam generator 79. A check valve 90 is provided on the path from the impeller driven steam generator 78 to the ejector driven steam generator 79.

  The ejector-driven steam generator 79 includes a solar heat receiving pipe 75 and a gas-liquid drum 85. The mixed fluid (volatile liquid) of propane and hexane supplied from the impeller-driven steam generator 78 is heated to an intermediate temperature level while passing through the solar heat receiving pipe 75, and gas-liquid separation is performed in the gas-liquid drum 85. Is done. A wavy line 82 in the gas-liquid drum 85 in FIG. 1 indicates the gas-liquid interface 82 in the gas-liquid drum 85, where propane is mainly separated on the gas phase side and hexane is the main component on the liquid phase side. The mixed fluid is separated. In addition, the safety valve 6 is attached to the gas-liquid drum 84.

  The steam (propane) separated and generated by the ejector-driven steam generator 79 passes through the intermittent injection valve mechanism 35, the receiver tank 4, and the pressure regulating valve 73 to the ejector 1 as ejector-driven steam (second drive steam). Supplied. The inflow of ejector-driven steam to the ejector 1 can be controlled by the intermittent injection valve mechanism 35. A part of the generated steam passes through piston-driven steam reciprocating pipes 7, 8, 9 and a header 87 functioning as a pressure guiding pipe, and a steam pressure-driven unabsorbed steam compressor 36 and a steam pressure-driven absorption described later. Used as driving steam for the medium circulation pump 37.

  On the other hand, the fluid on the liquid phase side (mixed fluid containing hexane as a main component) separated by the ejector-driven steam generator 79 is supplied to the jet mixer 25 via the absorption medium pipe 11. On the absorption medium pipe 11, a pressure regulating valve 72, a radiator 77, and an absorption medium cooler 10 are provided. The hexane as the absorption medium is sufficiently cooled before being supplied to the jet mixer 25, The absorption effect is enhanced.

  The ejector 1 is driven by ejector-driven steam (propane) generated by the ejector-driven steam generator 79. Then, the steam (propane) injected into the steam-driven mechanical force extraction impeller 16 is sucked through the impeller-driven steam discharge conduit 15. As a result, the receiver tank 5 becomes a low pressure part, and the pressure difference between the header 86 as the high pressure part and the receiver tank 5 as the low pressure part increases. If it does so, the injection force of impeller drive steam will increase and the impeller 16 for taking out steam drive mechanical force can be rotated, and power can be taken out efficiently. The impeller driving steam (first driving steam) and the ejector driving steam (second driving steam) that have passed through the ejector 1 are discharged as mixed steam.

  A jet mixer suction port 26 of the jet mixer 25 is connected to the discharge portion of the ejector 1 via the receiver tank 3. Furthermore, hexane, which is an absorption medium, is injected into the jet mixer 25 from the gas-liquid drum 85 of the ejector-driven steam generator 79 via the absorption medium pipe 11. The jet mixer 25 rapidly mixes and contacts the mixed vapor of ejector-driven steam (propane) and impeller-driven steam (propane) with the absorption medium (hexane), so that hexane absorbs propane and absorbs liquefaction. It is supposed to be.

  A heat radiator 77 is provided in the absorption medium conduit 11. Further, the absorption medium conduit 11 is provided with an absorption medium cooler 10 provided with a heat exchanger, and is precooled to enhance the absorption effect of the absorption medium (hexane). As a heat source for precooling of the absorption medium cooler 10, unabsorbed steam in the absorber 27 described later is compressed by an unabsorbed steam compressor 36, precooled by atmospheric heat in a radiator 76, and then the adiabatic expansion valve 12 is used. Let it pass through and use the cold generated with adiabatic expansion at that time. In addition, when there is a cold heat source such as low temperature drainage, this may be used.

  An absorber 27 is disposed at the discharge portion of the jet mixer 25, and propane is absorbed (absorbed and liquefied) by hexane, and gas-liquid separation is performed. A wavy line 81 in the absorber 27 in FIG. 1 indicates a gas-liquid interface 81. A mixed fluid of propane and hexane (hexane that has absorbed propane) is separated on the liquid phase side, and a gas phase side on the gas phase side. Propane vapor (unabsorbed propane vapor not absorbed by hexane) is separated.

The mixed fluid of propane and hexane on the liquid phase side separated by the absorber 27 is circulated to the impeller-driven steam generator 78 via the absorption medium return pipe 38. In the middle of the absorption medium return pipe 38, an air vent valve 2 and a vapor pressure driven absorption medium circulation pump 37 for circulating a mixed fluid (volatile liquid) of propane and hexane are arranged. In addition to the role of circulating the mixed fluid, the vapor pressure driven absorption medium circulation pump 37 pressurizes the mixed fluid in a liquid state, thereby increasing the pressure in the impeller driven steam generator 78 and the ejector driven steam generator 79. Has a role to promote.
As will be described later, the vapor pressure driven absorption medium pump 37 is driven by using a part of the steam (propane) separated and generated by the ejector driven steam generator 79. You may use the thing by the power of.

On the other hand, propane vapor on the gas phase side separated by the absorber 27 (unabsorbed propane vapor not absorbed by hexane) passes through the unabsorbed vapor discharge line 24 and the unabsorbed vapor return line 29. It comes to circulate. Then, on the path, the unabsorbed steam is compressed by the vapor pressure driven unabsorbed steam compressor 36, precooled by atmospheric heat in the radiator 76, and then passed through the adiabatic expansion valve 12. The propane itself is cooled by the cold generated along with the adiabatic expansion at that time, and the absorption medium (hexane) in the absorption medium conduit 11 is cooled via the absorption medium cooler 10.
As will be described later, the vapor pressure driven non-absorbing vapor compressor 36 is driven by using a part of the steam (propane) separated and generated by the ejector driven steam generator 79. You may use the thing by other motive power, such as a machine.

Next, effects of the intermediate temperature engine according to the present embodiment will be described.
First, in the impeller drive steam generator 78, the mixed fluid of propane and hexane is heated by solar heat, and impeller drive steam (propane) is generated. The generated impeller-driven steam is injected to the steam-driven mechanical force extraction impeller 16 via the impeller-driven steam injection pipes 17 and 18, and power is taken out. Then, the impeller driven steam that has been jetted travels toward the ejector 1 via the impeller driven steam discharge conduits 13, 14, and 15.

  Here, since the heating in the impeller-driven steam generator 78 is due to solar heat at a medium temperature level, the pressure of the impeller-driven steam (propane) generated by the impeller-driven steam generator 78 is generally sufficient. Not something. Therefore, in the present embodiment, the receiver tank 5 is made a low-pressure part by sucking the impeller-driven steam by the ejector 1 via the impeller-driven steam discharge pipes 13, 14, 15, and the header that is a high-pressure part. 86 and the pressure difference between the receiver tank 5 which is a low pressure part is increased. As a result, the injection force of the impeller-driven steam increases, and the power can be efficiently taken out by rotating the steam-driven mechanical force extraction impeller 16.

  On the other hand, propane was used as a vapor component for driving the ejector 1. Propane is vaporized by heating at an intermediate temperature level using the ejector-driven steam generator 79, and the pressure required for the drive steam of the ejector 1 can be obtained.

  Further, since the steam (propane) sucked into the ejector 1 needs to be supplied again to the impeller-driven steam generator 78, it is absorbed by the absorber 27 by the absorber 27 and passes through the absorption medium return line 38. Return to the impeller driven steam generator 78.

  Here, in this embodiment, hexane was used as one of the substances having a high affinity with propane, which is ejector-driven steam, as an absorbing medium for further increasing the suction force of the ejector 1. That is, the ejector-driven steam (propane) discharged from the ejector 1 is absorbed by rapidly mixing and contacting the ejector-driven steam (propane) discharged from the ejector 1 and the absorption medium (hexane) with the jet mixer 25. It is supposed to be. As a result, at the discharge port of the ejector 1, the pressure is reduced by absorbing propane, and the suction force of the ejector 1 can be increased.

  Moreover, in order to enhance the absorption effect of hexane, hexane is precooled by the absorption medium cooler 10. Further, as the precooling cold heat source, the unabsorbed steam in the absorber 27 is compressed by the vapor pressure driven unabsorbed steam compressor 36 and precooled by the atmospheric heat in the radiator 76, and then passed through the adiabatic expansion valve 12. In this case, the cold generated with the adiabatic expansion is utilized. Therefore, the absorption effect of hexane can be effectively enhanced without preparing a separate cold heat source.

In this embodiment, propane is used as the impeller driving steam and ejector driving steam, and hexane is used as the absorption medium. However, the substance used in the absorption medium is higher than the boiling point of the substance used in the impeller driving steam and ejector driving steam. As long as the boiling point of the combination is higher, various substances can be used.
For example, single or a mixture of two or more hydrocarbons having 2 to 5 carbon atoms in the molecule is used as impeller-driven steam and ejector-driven steam, and impeller-driven steam and ejector are used as an absorption medium. It is preferable to use a single or a mixture of two or more hydrocarbons having 1 to 2 carbon atoms in the molecule rather than all the hydrocarbons used in the driving steam.

  Further, the impeller-driven steam and ejector-driven steam used in the present embodiment are not necessarily 100% propane, and naturally include a hexane vapor component. Similarly, the absorption medium is not 100% hexane but also contains a propane component.

  Moreover, although the propane which is the same substance was used as impeller drive steam (1st drive steam) and ejector drive steam (2nd drive steam), it is also possible to use a different substance, respectively. However, when another substance is used, a mechanism for separating the two after passing through the ejector is required, so that the same substance can be used in a simpler configuration.

  In the present embodiment, the impeller-driven steam generator 78 and the ejector-driven steam generator 79 are connected in series and circulated. However, the impeller-driven steam generator 79 and the ejector-driven steam generator 79 may be circulated through different paths without being connected in series. Good.

  Next, the intermittent injection valve mechanism 35 for supplying ejector-driven steam to the ejector 1 will be described with reference to FIG. The intermittent injection valve mechanism 35 intermittently injects ejector-driven steam generated by the ejector-driven steam generator 79 toward the ejector 1, thereby injecting only relatively high-pressure steam into the ejector 1, thereby improving energy efficiency. It is.

  The intermittent injection valve mechanism 35 includes a plurality of magnets 100, 101, 108, 109, 110, a closing plug 40, and check valves 91, 92. The closing plug 40 in which the magnet 110 is built is formed in an arrow shape and is movable up and down. Normally, the closing plug 40 is attracted to the magnets 101 and 108 and closes the plug. Next, when propane, which is ejector-driven steam, is supplied from the gas-liquid drum 85 of the ejector-driven steam generator 79 via the ejector-driven steam inlet 42, the closure plug 40 is pushed up by the pressure, and the plug is open. The ejector-driven steam is supplied to the ejector 1 via the ejector-driven steam outlet 43.

  Once the plug is opened and the ejector-driven steam is discharged, the pressure that pushes up the closing plug 40 decreases, and is attracted to the magnets 101 and 108 again to close the plug. And supply of ejector drive steam to ejector 1 stops. By repeating the above, the intermittent injection valve mechanism 35 can intermittently inject ejector-driven steam to the ejector 1. Thus, by performing intermittent injection, only the steam having a relatively high pressure can be injected to the ejector 1 to increase the energy efficiency.

Next, the steam pressure driven non-absorbing steam compressor 36 will be described with reference to FIG.
The vapor pressure driven non-absorbing vapor compressor 36 is composed of a plurality of magnets 102, 103, 106, a piston 63, and check valves 93, 94. It is connected to the gas-liquid drum 85 of the driving steam generator 79. The piston 63 in which the magnets 103 and 106 are built is formed in a T shape and is movable up and down. Here, part of the ejector-driven steam generated in the gas-liquid drum 85 of the ejector-driven steam generator 79 enters and is discharged from the piston-driven steam inlet / outlet 50. The piston 63 moves up and down under the influence of the pressure of the vapor that has entered and the repulsive force of the plurality of magnets 102, 103, and 106. As a result, it functions as a compressor that compresses unabsorbed steam that enters from the unabsorbed steam inlet 52 and exits from the unabsorbed steam outlet 53.

Next, the vapor pressure driven absorption medium circulation pump 37 will be described with reference to FIG.
The vapor pressure driven absorption medium circulation pump 37 includes a plurality of magnets 104, 105, 107, a piston 64, and check valves 95, 96. The steam generator 79 is connected to a gas-liquid drum 85. The piston 64 in which the magnets 105 and 107 are built is formed in a T shape and is movable up and down. Here, a part of the ejector-driven steam generated in the gas-liquid drum 85 of the ejector-driven steam generator 79 enters and is discharged from the piston-driven steam inlet / outlet 51. The piston 64 moves up and down under the influence of the pressure of the vapor that has entered and the repulsive force of the plurality of magnets 104, 105, and 107. As a result, it functions as a circulation pump for circulating the absorption medium that enters from the absorption medium inlet 54 and exits from the absorption medium outlet 55.

In the intermittent injection valve mechanism 35, the vapor pressure driven non-absorbing vapor compressor 36, and the vapor pressure driven absorbing medium circulation pump 37, a magnet is used as a reaction force accompanying a pressure fluctuation, but a mechanical force such as a spring is used. May be.
Moreover, the magnet built in the closing plug 40 of the intermittent injection valve mechanism 35 is for the purpose of increasing the pressure at the time of opening only at the initial moment, thereby increasing the instantaneous intermittent injection force.

  Since the intermediate temperature heat melting type refrigeration apparatus according to the present embodiment is configured as described above, the following effects are obtained.

  The impeller-driven steam that drives the impeller 16 for taking out the steam-driven mechanical force is generated by heating the mixed fluid of propane and hexane with solar heat by the impeller-driven steam generator 78. Power can be taken out.

  Further, since the ejector 1 for sucking the impeller-driven steam is provided on the downstream side of the steam-driven mechanical force extraction impeller 16, the upstream header 86 (high pressure section) of the steam-driven mechanical force extraction impeller 16 and By increasing the pressure difference of the receiver tank 5 (low pressure part) on the downstream side, the steam-driven mechanical force extraction impeller 16 can be efficiently operated to extract power.

  In addition, since the ejector-driven steam for driving the ejector 1 is generated by heating the mixed fluid of propane and hexane by solar heat by the ejector-driven steam generator 79, medium temperature heat of 100 ° C. or less can be used.

  Further, after the mixed steam composed of the impeller driven steam and the ejector driven steam after passing through the ejector 1 is liquefied and returned to the mixed fluid of propane and hexane, the impeller driven steam generator 78 and the ejector driven steam generator 79 are returned. Therefore, the mixed fluid of propane and hexane can be circulated and used effectively.

  Moreover, the mixed vapor (propane) is absorbed into the absorption medium (hexane) by bringing the mixed vapor (propane) after passing through the ejector 1 into contact with the absorption medium (hexane) having high affinity with the mixed vapor (propane). Can be absorbed and liquefied. As a result, at the discharge port of the ejector 1, the pressure is reduced by removing the mixed vapor (propane), and the suction force of the ejector 1 can be increased.

  Further, hexane having a boiling point higher than that of propane is used as an absorption medium, and further, the absorption medium (hexane) that has absorbed the mixed vapor (propane) is heated at a medium temperature of 100 ° C. or less by an ejector-driven steam generator 79, By separating the ejector-driven steam (propane) and the absorption medium (hexane) in a liquid state by gas-liquid separation, the separated ejector-driven steam (propane) is supplied to the ejector, and the separated absorption medium (hexane) is passed through the ejector. Since it can be brought into contact with the mixed vapor, the volatile liquid (mixed fluid of propane and hexane) and the absorption medium (hexane) can be efficiently recycled.

  Instead of the ejector-driven steam generator 79, the impeller-driven steam generator 78 heats the absorbing medium (hexane) that has absorbed the mixed steam (propane) with medium temperature heat of 100 ° C. or less, and impeller-driven steam. (Propane) and liquid absorption medium (hexane) are gas-liquid separated, and the separated impeller drive steam (propane) is supplied to the steam drive mechanical force extraction impeller 16 and the separated absorption medium (hexane) ) May be brought into contact with the mixed vapor after passing through the ejector.

  Moreover, the absorption effect of the absorption medium (hexane) can be enhanced by cooling the absorption medium (hexane) in advance before contacting the mixed vapor after passing through the ejector 1. It is not necessary to prepare a separate heat source by generating the cold heat for cooling by compressing and precooling the unabsorbed mixed vapor that has not been absorbed by the absorbent medium (hexane) and then adiabatically expanding it.

  Further, by intermittently operating the ejector 1 by the intermittent injection valve mechanism 35 that opens and closes according to the pressure of the ejector-driven steam, the energy efficiency can be increased using the ejector-driven steam having a high pressure.

  As described above, according to the present invention, it is possible to efficiently extract power using medium temperature heat of 100 ° C. or less obtained from solar heat.

  In the present embodiment, solar heat is used as a driving energy source, but waste heat or geothermal heat can also be used.

  The present invention is intended to generate power by using environmentally friendly solar heat and waste waste heat that can be easily used, and the widespread use of this technology is widely useful as a medium temperature engine that contributes to resource saving and energy saving. Is.

Claims (6)

Steam-driven mechanical force extraction means driven by steam;
A first driving steam that heats the volatile liquid at a medium temperature of 100 ° C. or less and generates a first driving steam that drives the steam driving mechanical force extraction means upstream of the steam driving mechanical force extraction means. Generating means;
An ejector for sucking the first drive steam downstream of the steam drive mechanical force extraction means;
A second driving steam generating means for heating the volatile liquid with a medium temperature of 100 ° C. or less to generate a second driving steam for driving the ejector;
Liquefying means for liquefying the mixed steam composed of the first driving steam and the second driving steam after passing through the ejector and returning it to the volatile liquid again;
An intermediate temperature engine comprising: a circulation means for circulating the liquefied volatile liquid to the first drive steam generation means and the second drive steam generation means.   The liquefaction means is characterized in that the mixed vapor after passing through the ejector is brought into contact with an absorbing medium having a high affinity with the mixed vapor, and the mixed vapor is absorbed into the absorbing medium and returned to the volatile liquid. The intermediate temperature engine according to claim 1. As the absorption medium, a substance having a boiling point higher than that of the substance used for the first driving steam and the second driving steam is used,
In the first driving steam generating means, the absorbing medium that has absorbed the mixed steam is heated at a medium temperature of 100 ° C. or less, and the first driving steam and the absorbing medium that is in a liquid state are gas-liquid separated,
The intermediate temperature heat according to claim 2, wherein the separated first driving steam is supplied to the steam driving mechanical force take-out means, and the separated absorbing medium is brought into contact with the mixed steam after passing through the ejector. organ. As the absorption medium, a substance having a boiling point higher than that of the substance used for the first driving steam and the second driving steam is used,
In the second driving steam generating means, the absorbing medium that has absorbed the mixed steam is heated at a medium temperature of 100 ° C. or less, and the second driving steam and the absorbing medium in a liquid state are gas-liquid separated,
The intermediate temperature heat engine according to claim 2, wherein the separated second driving steam is supplied to the ejector, and the separated absorption medium is brought into contact with the mixed steam after passing through the ejector.   Before the non-absorbed mixed vapor that has not been absorbed by the absorbent medium is compressed and pre-cooled, and then brought into contact with the mixed vapor after passing through the ejector by the cold generated by adiabatic expansion, The intermediate temperature engine according to any one of claims 2 to 4, wherein the engine is cooled.   The inside of the intermittent injection valve mechanism which opens and closes according to the pressure of the said 2nd driving steam, The said ejector is operated intermittently, The inside of any one of Claim 1 thru | or 5 characterized by the above-mentioned. Thermal engine.

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