JP2016014328A - Compression device, compression device mode switching method, and compression device assembly method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily install a heat exchanger to which a working medium flow passage in which a working medium for driving an expander flows while suppressing increase in flow passage resistance in a compressed gas flow passage is attached, in a compression device.SOLUTION: A compression device comprises: a compressor (10) compressing gas; and a heat exchanger (20) recovering heat of the compressed gas discharged from the compressor (10), the heat exchanger (20) including a gas flow passage (22) through which the compressed gas passes; a first flow passage (24) including connection end portions (24a, 24b) on both ends, respectively and contacting the gas flow passage (22); a second flow passage (26) including connection end portions (26a, 26b) on both ends, respectively and contacting the gas flow passage (22); and a third flow passage (30) detachably connectable to one connection end portion (24a) of the first flow passage (24) and one connection end portion (26a) of the second flow passage (26), and having a shape for communicating the first flow passage (24) with the second flow passage (26) in a state of being connected to these connection end portions (24a, 26a).

Description

  The present invention relates to a compression apparatus, a method for switching modes of the compression apparatus, and a method for assembling the compression apparatus.

  In recent years, as disclosed in Patent Document 1, a technique for recovering heat energy of compressed gas and generating electric power has been proposed. In Patent Document 1, the compressor, the evaporator that exchanges heat between the compressed gas discharged from the compressor and the liquid phase working medium, the cooler that cools the gas that flows out of the evaporator, and the evaporator that flows out of the evaporator Turbine into which the gas phase working medium flows, an AC generator connected to the turbine, a condenser for condensing the working medium flowing out from the turbine, and a circulation pump for pumping the liquid phase working medium flowing out from the condenser to the evaporator And an energy recovery system for a compressor comprising a working medium flow path connecting an evaporator, a turbine, a condenser, and a circulation pump. A cooling fluid (for example, cooling water) is supplied to the cooler through a cooling fluid supply channel. In this system, the energy of the compressed gas is recovered by an evaporator, and electricity is generated by an AC generator using the energy.

JP 2013-057256 A

  By the way, in Patent Document 1, since an evaporator and a cooler, that is, two heat exchangers independent of each other are provided on the flow path of the compressed gas, the flow path resistance in the flow path is increased, and the discharge pressure of the compressed gas is increased. It will decline. Furthermore, in the case of a compression device in which devices such as a compressor and a cooler are accommodated in one accommodating part, it is difficult to secure a space for installing the evaporator in the accommodating part.

  The present invention has been made in view of the above problems, and a compression apparatus includes a heat exchanger having a working medium flow path through which a working medium that drives an expander flows while suppressing an increase in flow path resistance in the compressed gas flow path. It is intended to be easily provided.

  As means for solving the above problems, the present invention comprises a compressor that compresses gas, and a heat exchanger that recovers heat of the compressed gas discharged from the compressor, and the heat exchanger comprises: A gas channel through which the compressed gas passes, a first channel having connection ends at both ends, a second channel having connection ends at both ends, one connection end of the first channel, and the first channel A third flow path that is detachably connectable to one connection end of the two flow paths and has a shape that allows the first flow path and the second flow path to communicate with each other. In a first mode in which the first flow path, the second flow path, and the third flow path are connected to the flow path, and in a state where the third flow path is removed, the heat of the compressed gas is recovered and expanded. The first flow path is connected to a working medium flow path through which a working medium that drives the machine flows, and the second flow path is connected to the cooling flow path. A second aspect to be connected, is switchable between, to provide a compression device.

  In the present invention, by connecting the third flow path to one connection end of the first flow path and one connection end of the second flow path, the first flow path and the second flow path are connected as the first mode. It is possible to cool the compressed gas by flowing a common medium (for example, cooling water). On the other hand, by removing the third flow path from the first flow path and the second flow path, the compressed gas can be cooled by flowing different media through the first flow path and the second flow path as the second mode. It becomes. In the compression device, it is possible to easily switch from the first mode to the second mode without making a major change. Further, compared to the case where a heat exchanger in which the cooling fluid flows on the flow path of the compressed gas and a heat exchanger in which the working medium flows are provided separately, an increase in the flow resistance of the compressed gas can be suppressed. The pressure can be secured.

  In this case, it is preferable that the third flow path is located outside the housing of the heat exchanger that houses the gas flow path, the first flow path, and the second flow path.

  If it does in this way, the 3rd channel can be removed easily.

  The present invention also includes a compressor that compresses gas and a heat exchanger that recovers heat of the compressed gas discharged from the compressor, wherein the heat exchanger has a gas flow path through which the compressed gas passes. A first flow path that has connection ends at both ends, and that can be connected to a working medium flow path through which a working medium that recovers heat of the compressed gas and drives the expander flows, and a cooling flow path through which the cooling fluid flows In a state before the first flow path is connected to the working medium flow path, and the second flow path connected to the connection end portions at both ends of the first flow path. And a closing member that closes the first flow path.

  In the present invention, by providing a portion blocked in advance by a blocking member in the flow path in the heat exchanger, when the heat of the compressed gas is recovered by the working medium, no major change is made to the compression device. The working medium flow path can be easily attached to the compression device. Further, compared to the case where a heat exchanger in which the cooling fluid flows on the flow path of the compressed gas and a heat exchanger in which the working medium flows are provided separately, an increase in the flow resistance of the compressed gas can be suppressed. The pressure can be secured. Further, the inside of the flow path closed by the closing member is maintained in a clean state.

  In the present invention, the working medium flow path, the expander, a power recovery unit connected to the expander, a condenser for condensing the working medium flowing out from the expander, and the condenser And a pump that sends the condensed working medium to the heat exchanger, and a heat energy recovery unit in which the pump, the heat exchanger, the expander, and the condenser are connected to the working medium flow path. It is preferable to further provide.

  In this way, the compressed gas is cooled by the working medium in the heat exchanger using the Rankine cycle by the working medium, and the thermal energy received from the compressed gas by the working medium at that time can be recovered by the power recovery unit. It becomes possible.

  Moreover, in this invention, it is preferable that the said 1st flow path is arrange | positioned in the said heat exchanger upstream from the said 2nd flow path.

  In this aspect, since the thermal energy of the compressed gas is effectively recovered by the working medium before the compressed gas is cooled by the cooling fluid flowing through the second flow path, the working medium receives more energy from the compressed gas. It becomes possible to collect.

  Further, in the present invention, the gas flow path is an internal space of the housing of the heat exchanger, and the first flow path and the second flow path are tubes that extend while meandering in the internal space. Is preferred.

  In this aspect, since the heat exchanger is a so-called shell and tube type, and the compressed gas passes through the internal space of the housing, the pressure loss generated in the compressed gas can be reduced as compared with the case where the compressed gas is passed through the pipe. . Furthermore, since the first flow path and the second flow path are meandering tubes, heat recovery from the compressed gas can be performed efficiently.

  In this case, it is preferable that a plurality of fins are formed on the outer surface of the first channel and the outer surface of the second channel.

  In this way, the contact area between the compressed gas and the first flow path and the contact area between the compressed gas and the second flow path are increased, so that the cooling efficiency of the compressed gas is improved.

  Moreover, this invention is a switching method of the aspect of a compression apparatus, Comprising: When switching from the said 1st aspect to the said 2nd aspect, the condenser which condenses the said expander and the working medium which flowed out of the said expander And a preparation for preparing an assembly comprising: a pump for sending the working medium condensed in the condenser to the heat exchanger; and the working medium flow path to which the pump, the expander, and the condenser are connected A step of removing the third flow path from the first flow path and the second flow path, and connecting end portions at both ends of the working medium flow path as connection end portions at both ends of the first flow path. And a connecting step of connecting the connection end portions at both ends of the cooling flow path to the connection end portions at both ends of the second flow path, respectively.

  In this method, the compressed gas is cooled by one type of medium flowing through the first flow path and the second flow path through the third flow path, and then the working medium flowing through the first flow path and the second flow path are flowed. While the compressed gas is cooled by the two types of mediums of the cooling fluid, the working medium is simply switched to the second mode in which the thermal energy received from the compressed gas in the first flow path is recovered by the power recovery unit of the thermal energy recovery unit be able to.

  In this case, it is preferable to further include a removing step of removing the cooling fluid flowing in the first flow path between the removing step and the connecting step.

  In this way, the fluid that has flowed through the first flow path in the first aspect is removed before switching from the first aspect to the second aspect, so the working medium that flows through the first flow path in the second aspect. Mixing with is suppressed.

  The present invention also relates to a method for assembling the compression apparatus, the expander, a condenser for condensing the working medium flowing out from the expander, and the working medium condensed in the condenser to the heat exchanger. A first preparation step of preparing an assembly having a pump to be fed, and the working medium flow path to which the pump, the expander and the condenser are connected; and removing the blocking member from the first flow path And connecting the connection end portions at both ends of the working medium flow path to the connection end portions at both ends of the first flow path, and connecting the connection end portions at both ends of the cooling flow path to the second flow path. And a connecting step of connecting to the connecting end portions at both ends of the assembly.

  In this method, when recovering the heat of the compressed gas by the working medium, the working medium flow path can be easily attached to the compressing apparatus without making a major change in the compressing apparatus.

  In this case, the compressor and the heat exchanger are assembled, further comprising a second preparation step of closing the first flow path of the heat exchanger by the closing member, and the first preparation step and the second preparation step It is preferable that a preparation process is performed at an assembly facility, and the removal process and the connection process are performed at a place where the compression apparatus is installed.

  The thermal energy recovery unit is installed in the assembly facility, and the thermal energy recovery unit, the compressor and the heat exchanger are installed in the assembly facility by attaching the thermal energy recovery unit to the compressor and the heat exchanger at the installation site. It is possible to reduce the transport work and the transport cost as compared with the case of being transported to the installation place in the assembled state.

  As described above, according to the present invention, it is easy to provide a compressor with a heat exchanger to which a working medium flow path through which a working medium that drives an expander flows is attached while suppressing an increase in flow resistance in the compressed gas flow path. Can be provided.

It is a figure which shows the outline of a structure of the compression apparatus of 1st Embodiment of this invention. It is a figure of the state by which the waste heat recovery unit was connected with respect to the compression apparatus of FIG. It is a figure which shows the outline of a structure of the compression apparatus of 2nd Embodiment of this invention.

  Preferred embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
A compression apparatus according to a first embodiment of the present invention will be described with reference to FIG.

  As shown in FIG. 1, the compression apparatus further compresses a first compressor 10 that compresses a gas such as air, a first heat exchanger 20, and a compressed gas that has flowed out of the first heat exchanger 20. The second compressor 110, the second heat exchanger 120, the cooling flow path 50, and a thermal energy recovery unit 40 (see FIG. 2) described later are provided. In the following description, the first compressor 10, the first heat exchanger 20, the second compressor 110, and the second heat exchanger 120 are collectively referred to as a “main part” of the compression device. In the present embodiment, the main body is accommodated in one accommodating portion (not shown).

  The first heat exchanger 20 is of a shell and tube type, and includes a gas flow path 22 through which compressed gas passes, a first flow path 24, a second flow path 26, and a third flow path 30. Yes. The gas flow path 22, the first flow path 24, and the second flow path 26 are accommodated in the housing 29 of the first heat exchanger 20. The entire third flow path 30 including the connection end 30 a is located outside the housing 29. The gas flow path 22 is an internal space formed in the housing 29, and the first flow path 24 and the second flow path 26 are tubes that meander in the internal space. The first flow path 24 has a connection end 24a formed at one end and a connection end 24b formed at the other end. A plurality of fins 25 are formed on the outer surface of the first flow path 24.

  The second flow path 26 has a connection end portion 26a formed at one end portion and a connection end portion 26b formed at the other end portion. A plurality of fins 27 are formed on the outer surface of the second flow path 26. The second flow path 26 is disposed downstream of the first flow path 24 in the compressed gas flow direction in the gas flow path 22.

  The third channel 30 has a connection end 30 a connected to the connection end 24 a of the first channel 24 and the connection end 26 a of the second channel 26, and the first channel 24, the second channel 26, To communicate. The connection end 30 a of the third flow path 30 is detachable from the connection end 24 a of the first flow path 24 and the connection end 26 a of the second flow path 26.

  The second compressor 110 is disposed on the downstream side of the first heat exchanger 20. The structure of the second compressor 110 is the same as that of the first compressor.

  The second heat exchanger 120 is disposed on the downstream side of the second compressor 110. Since the structure of the 2nd heat exchanger 120 is the same as that of the 1st heat exchanger 20, description is simplified. That is, the second heat exchanger 120 has a gas flow path 122, a first flow path 124, a second flow path 126, and a third flow path 130. The gas flow path 122, the first flow path 124, and the second flow path 126 are accommodated in the housing 129, and the third flow path 130 is located outside the housing 129. A plurality of fins 125 and 127 are formed on the outer surface of the first channel 124 and the outer surface of the second channel 126. The connection end 124a of the first flow path 124 and the connection end 126a of the second flow path 126 are detachably connected to the connection end of the third flow path 130, respectively. The path 124 and the second flow path 126 are communicated.

  A cooling fluid for cooling the compressed gas flows through the cooling flow path 50. For example, water is used as the cooling fluid. The cooling fluid may be a liquid other than water. The cooling channel 50 has a branch channel 51. In the first heat exchanger 20, the connection end 24 b opposite to the connection end 24 a to which the third flow path 30 of the first flow path 24 is connected is detachable from the connection end 50 a of the cooling flow path 50. Connected. In addition, the connection end 26 b opposite to the connection end 26 a to which the third flow path 30 of the second flow path 26 is connected is detachably connected to the connection end 50 a of the cooling flow path 50. As a result, the cooling fluid flows through the first heat exchanger 20 through the cooling flow path 50 to the first flow path 24, the second flow path 26, and the third flow path 30.

  In the second heat exchanger 120, the connection end 124b opposite to the connection end 124a to which the third flow path 130 of the first flow path 124 is connected is detachable from the connection end 51a of the branch flow path 51. Connected. A connection end 126 b opposite to the connection end 126 a to which the third flow path 130 of the second flow path 126 is connected is detachably connected to the connection end 51 a of the branch flow path 51. As a result, the cooling fluid flows through the second heat exchanger 120 to the first flow path 124, the second flow path 126, and the third flow path 130 via the branch flow path 51.

  In the following description, the aspect of the compression device in which the first flow paths 24 and 124, the second flow paths 26 and 126, and the third flow paths 30 and 130 are connected to the cooling flow path 50 and the branch flow path 51 is referred to as “first. Referred to as “aspect”. In the first aspect, in the first heat exchanger 20, the cooling fluid flowing through the first flow path 24 and the second flow path 26 exchanges heat with the compressed gas passing through the gas flow path 22, and the compressed gas is cooled. Thereby, generation | occurrence | production of the malfunction of the 2nd compressor 110 by high temperature compressed gas flowing in into the 2nd compressor 110 can be prevented. Also in the second heat exchanger 120, the cooling fluid flowing through the first flow path 124 and the second flow path 126 exchanges heat with the compressed gas passing through the gas flow path 122, and the compressed gas is cooled. Note that the cooling fluid flowing out from the first heat exchanger 20 joins the cooling fluid flowing out from the second heat exchanger 120.

  Next, the thermal energy recovery unit 40 will be described with reference to FIG.

  The thermal energy recovery unit 40 is a so-called Rankine cycle device, and includes a pump 42, an expander 44, a power recovery unit 45, a condenser 46, and a working medium flow path 48 that is a circulation flow path through which the working medium circulates. Is provided. The working medium channel 48 includes a branch channel 49. As will be described later, the first heat exchanger 20 and the second heat exchanger 120 also serve as an evaporator that evaporates the liquid working medium as part of the thermal energy recovery unit 40. In the present embodiment, an organic fluid having a boiling point lower than that of water such as R245fa is used as the working medium.

  The working medium flow path 48 connects the expander 44, the condenser 46, the pump 42, the first heat exchanger 20 and the second heat exchanger 120 in this order. The working medium flow path 48 has a connection end 48 a that can be detachably connected to the connection ends 24 a and 24 b of the first flow path 24 of the first heat exchanger 20. The connection end 48 a is downstream of the working medium channel 48 and the pump 42 in the working medium channel 48, and upstream of the working medium channel 48 and the expander 44. It is formed in the side part.

  The branch channel 49 is connected in parallel to a portion of the working medium channel 48 between the pump 42 and the expander 44. In other words, the branch flow path 49 branches a part of the liquid working medium that has flowed out of the pump 42 and joins the upstream part of the expander 44 in the working medium flow path 48. The branch flow path 49 has a connection end portion 49 a that can be detachably connected to the connection end portions 124 a and 124 b of the first flow path 124 of the second heat exchanger 120.

  The working medium flow path 48 and the branch flow path 49 are connected to the first flow paths 24 and 124 with the third flow paths 30 and 130 in FIG. 1 removed.

  The pump 42 pressurizes the liquid working medium to a predetermined pressure and sends it to the first heat exchanger 20 and the second heat exchanger 120. As the pump 42, a centrifugal pump having an impeller as a rotor, a gear pump in which the rotor includes a pair of gears, or the like is used.

  The expander 44 is located downstream of the first heat exchanger 20 and the second heat exchanger 120 in the working medium flow path 48. As the expander 44, a positive displacement screw expander is used. The expander 44 includes a casing having a rotor chamber formed therein, and a pair of male and female screw rotors rotatably supported in the rotor chamber. The screw rotor is rotated by the expansion of the gas phase working medium flowing into the rotor chamber. The expander 44 is not limited to a screw expander, and a centrifugal type or a scroll type may be used.

  The power recovery unit 45 is connected to the expander 44. In the present embodiment, a power generator is used as the power recovery unit 45. The power recovery unit 45 has a rotating shaft connected to one of the pair of screw rotors of the expander 44. The power recovery unit 45 generates electric power when the rotating shaft rotates with the rotation of the screw rotor.

  The condenser 46 is provided in a portion of the working medium channel 48 on the downstream side of the expander 44 (a portion between the expander 44 and the pump 42 in the working medium channel 48). The condenser 46 condenses (liquefies) the working medium by cooling it with a cooling fluid (cooling water or the like). In the present embodiment, the cooling fluid used in the first heat exchanger 20 and the second heat exchanger 120 is used as a fluid that exchanges heat with the working medium in the condenser 46. By sharing the cooling fluid between the condenser 46 and the first heat exchanger 20 and the second heat exchanger 120, the compression device can be downsized.

  When the thermal energy recovery unit 40 described above is driven, the working medium recovers and evaporates the heat of the compressed gas in the first heat exchanger 20 and the second heat exchanger 120 functioning as an evaporator. The expander 44 and the power recovery unit 45 are driven by flowing into the expander 44 and expanding. The working medium discharged from the expander 44 is condensed by the condenser 46, and the condensed liquid working medium is sent again to the first heat exchanger 20 and the second heat exchanger 120 by the pump 42. As described above, the working medium circulates in the working medium flow path 48, whereby electric power is generated in the power recovery unit 45.

  In the first heat exchanger 20, when the working medium channel 48 is connected to the first channel 24, the connection end 50 a of the cooling channel 50 is connected to the connection ends 26 a and 26 b of the second channel 26. The Also in the second heat exchanger 120, when the branch channel 49 of the working medium channel 48 is connected to the first channel 124, the connection end portion 51a of the branch channel 51 of the cooling channel 50 has the second heat. It is connected to the connection end portions 126 a and 126 b of the second flow path 126 of the exchanger 120. In the following description, in a state where the third flow paths 30 and 130 are removed, the first flow paths 24 and 124 are connected to the working medium flow path 48 and the branch flow path 49, and the cooling flow path 50 and An aspect of the compression device in which the second flow paths 26 and 126 are connected to the branch flow path 51 is referred to as a “second aspect”.

  Then, the flow at the time of a compression apparatus switching from a 1st aspect to a 2nd aspect is demonstrated. First, the expander 44, the condenser 46, and the pump 42 shown in FIG. 2 are connected to the working medium flow path 48, and the power recovery unit 45 is connected to the expander 44 (preparation process). Hereinafter, the expander 44, the power recovery unit 45, the condenser 46, the pump 42, and the working medium channel 48 before being connected to the first and second heat exchangers 20 and 120 are collectively referred to as an “assembly”. When the assembly is prepared, the cooling flow path 50 is removed from the first heat exchanger 20 shown in FIG. 1 and the branch flow path 51 is removed from the second heat exchanger 120. And the 3rd flow path 30 of the 1st heat exchanger 20 and the 3rd flow path 130 of the 2nd heat exchanger 120 are removed (removal process). In the 1st heat exchanger 20, since the 3rd flow path 30 is located in the exterior of the housing | casing 29, removal is performed easily. The same applies to the second heat exchanger 120.

  By blowing dry hot air into the first flow path 24 of the first heat exchanger 20 and the first flow path 124 of the second heat exchanger 120, the inside of each first flow path 24, 124 is dried, The cooling fluid is removed (removal step).

  Next, as shown in FIG. 2, the connection end 48 a of the working medium channel 48 is connected to the connection ends 24 a and 24 b of the first channel 24 of the first heat exchanger 20, and the second heat exchanger is connected. The connection end portion 49 a of the branch flow channel 49 is connected to the connection end portions 124 a and 124 b of the 120 first flow channel 124. Further, the connection end 50a of the cooling flow path 50 is connected to the connection ends 26a and 26b of the second flow path 26 of the first heat exchanger 20, and the connection of the second flow path 126 of the second heat exchanger 120 is connected. The connection end 51a of the branch channel 51 is connected to the ends 126a and 126b (connection process).

  With the above flow, the attachment of the thermal energy recovery unit 40 to the main body is completed, and the aspect of the compression device is changed from the first aspect to the second aspect. In the second aspect, the compressed gas passing through the gas flow paths 22 and 122 is cooled by the working medium flowing through the first flow paths 24 and 124 and then cooled by the cooling fluid flowing through the second flow paths 26 and 126. . Therefore, in the second aspect, the compressed gas can be effectively cooled by the working medium and the cooling fluid, and the thermal energy of the compressed gas can be effectively recovered by the power recovery unit 45 via the working medium. it can. Since the cooling fluid is used for condensing the working medium in the condenser 46 before cooling the compressed gas, the working medium can be sufficiently cooled, and the power generation efficiency can be improved.

  As described above, in the compression device of this embodiment, the thermal energy recovery unit 40 can be easily attached to the main body by removing the third flow paths 30 and 130. In particular, even when the main body is accommodated in one accommodating portion, the installation work of the thermal energy recovery unit 40 is prevented from becoming complicated. Further, in the compression device, since a part of the flow path through which the cooling fluid flows in the first heat exchanger 20 and the second heat exchanger 120 is used as the flow path of the working medium, heat exchange between the working medium and the compressed gas is performed. Therefore, it is not necessary to provide a new heat exchanger separately from the first heat exchanger 20 and the second heat exchanger 120, and an increase in flow path resistance on the flow path through which the compressed gas flows can be prevented. The manufacturing cost of the compression device can also be suppressed.

  In the first heat exchanger 20, since the gas flow path 22 through which the compressed gas flows is an internal space of the housing 29 of the first heat exchanger 20, the flow path resistance generated in the compressed gas can be further reduced. The same applies to the second heat exchanger 120.

  Furthermore, in this embodiment, after removing each 3rd flow path 30 and 130, before connecting the working-medium flow path 48 and the branch flow path 49, the inside of each 1st flow path 24 and 124 is dried. Therefore, mixing of the cooling fluid flowing through the first flow paths 24 and 124 in the first mode and the working medium flowing through the first flow paths 24 and 124 in the second mode is suppressed. It is not always necessary to dry the cooling fluid as long as the cooling fluid can be removed. For example, fluid such as lubricating oil used for lubricating the working medium and the equipment in the expander 44 in the first flow paths 24 and 124. The cooling fluid may be washed away.

  In the above embodiment, the working medium flow path 48 is detachably connected to the first flow path 24 of the first heat exchanger 20 disposed on the upstream side in the flow direction of the compressed gas with respect to the second flow path 26. It is possible. Similarly, the branch flow path 49 can be detachably connected to the first flow path 124 of the second heat exchanger 120. Therefore, in the second aspect, since the thermal energy of the compressed gas is effectively recovered by the working medium before the compressed gas is cooled by the cooling fluid flowing through the second flow paths 26 and 126, the working medium is compressed gas. It becomes possible to recover more energy from.

  In the above embodiment, a plurality of fins 25, 27, 125, and 127 are formed on the outer surfaces of the first flow paths 24 and 124 and the outer surfaces of the second flow paths 26 and 126. Therefore, since the contact area between the compressed gas and the first flow paths 24 and 124 and the contact area between the compressed gas and the second flow paths 26 and 126 are increased, the efficiency of heat exchange is improved.

  In the first embodiment, the assembly preparation process may be performed after the removal process of the third flow paths 30 and 130 and the cooling fluid removal process, or may be performed in parallel.

(Second Embodiment)
A compression apparatus according to a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, only parts different from the first embodiment will be described, and the description of the same structure, operation, and effect as in the first embodiment will be omitted.

  In the present embodiment, the first heat exchanger 20 includes a closing member 32 instead of the third flow path 30. In addition, it is the same as 1st Embodiment that the 1st heat exchanger 20 is provided with the gas flow path 22, the 1st flow path 24, and the 2nd flow path 26. FIG. Similar to the first heat exchanger 20, the second heat exchanger 120 includes a gas flow path 122, a first flow path 124, a second flow path 126, and a closing member 132.

  In the first heat exchanger 20, the closing member 32 is detachably connected to the connection end portions 24 a and 24 b at both ends of the first flow path 24, and the first flow path 24 is closed. Similarly, also in the 2nd heat exchanger 120, the closure member 132 is detachably connected to the connection end parts 124a and 124b of the both ends of the 1st flow path 124, and the 1st flow path 124 is obstruct | occluded. Hereinafter, the aspect of the compression device in which the closing members 32 and 132 are attached to the first flow paths 24 and 124 is referred to as “third aspect”.

  Next, an assembly flow between the main body of the compression device and the thermal energy recovery unit 40 will be described. First, in an assembly facility such as a factory, the first compressor 10, the first heat exchanger 20, the second compressor 110, and the second heat exchanger 120 as the main body are assembled, and the first heat exchanger 20 and The closing members 32 and 132 are attached to the first flow paths 24 and 124 of the second heat exchanger 120 to form the third mode described above (second preparation step). Similarly to FIG. 2, an assembly of the expander 44, the condenser 46, the pump 42, the working medium flow path 48, and the power recovery unit 45 is prepared (first preparation step). The first preparation step and the second preparation step may be performed simultaneously, and one may precede the other. In addition, the first preparation process and the second preparation process are not necessarily performed in the same assembly facility.

  When the first preparation process and the second preparation process are completed, the main body and the assembly are transferred to the installation site of the compression device.

  At the installation site, the closing member 32 is removed from the first heat exchanger 20 of the main body shown in FIG. 3, and the closing member 132 is removed from the second heat exchanger 120 (removal step). As in FIG. 2, the connection ends 48 a of the working medium flow channel 48 are connected to the connection ends 24 a and 24 b at both ends of the first flow channel 24 of the first heat exchanger 20. The connection end portions 49 a of the branch flow channel 49 of the working medium flow channel 48 are connected to the connection end portions 124 a and 124 b at both ends of the first flow channel 124 of the second heat exchanger 120. In addition, the connection end portions 50a of the cooling channel 50 are connected to the connection ends 26a and 26b at both ends of the second channel 26 of the first heat exchanger 20, and the second channel of the second heat exchanger 120 is connected. The connection end portions 51a of the branch flow channel 51 of the cooling flow channel 50 are connected to the connection end portions 126a and 126b at both ends of the 126 (connection process). The condenser 46 is also connected to the cooling channel 50.

  The assembly of the compression device is completed by the above flow.

  In the second embodiment, the thermal energy recovery unit 40 can be easily attached to the main body by removing the blocking members 32 and 132 from the first heat exchanger 20 and the second heat exchanger 120. After the thermal energy recovery unit 40 and the main body are assembled at the assembly facility, they are integrated at the installation site, so that these members are transported as compared to the case of being transported to the installation site in an integrated state. It is possible to reduce work load and transport cost. The degree of freedom in assembling the compression device is also improved.

  Similar to the first embodiment, it is possible to prevent an increase in flow path resistance on the flow path through which the compressed gas flows, compared to the case where a dedicated heat exchanger for heat exchange between the working medium and the compressed gas is provided. .

  In a state before the first flow paths 24 and 124 are connected to the working medium flow path 48, the closing members 32 and 132 are connected to the first flow paths 24 and 124, whereby the first flow paths 24 and 124 are connected. It is kept clean.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the thermal energy recovery unit 40 of the above embodiment, only one of the first heat exchanger 20 or the second heat exchanger 120 may be used as an evaporator that recovers heat from the compressed gas. The method of recovering heat from the compressed gas using the thermal energy recovery unit 40 may be applied to a single-stage compression apparatus or may be applied to a compression apparatus having three or more compressors.

  In 1st Embodiment, the 3rd flow paths 30 and 130 may be arrange | positioned inside the 1st heat exchanger 20 and the 2nd heat exchanger 120, respectively.

  In the above embodiment, the expander 44 may be directly connected to the first compressor 10 or the second compressor 110 via a coupling. That is, the first compressor 10 or the second compressor 110 may be the power recovery unit 45. In the above embodiment, the cooling fluid may flow into the condenser 46 after recovering the heat of the compressed gas. In the condenser 46, a cooling fluid flowing through a different path from the first and second heat exchangers 20 and 120 may be used. Also in the 1st heat exchanger 20 and the 2nd heat exchanger 120, the cooling fluid which flows through a mutually different path | route may be utilized.

DESCRIPTION OF SYMBOLS 10 1st compressor 20 1st heat exchanger 22 Gas flow path 24 1st flow path 24a, 24b Connection end part 25 Fin 26 2nd flow path 26a, 26b Connection end part 27 Fin 30 3rd flow path 32 Closure member 40 Thermal energy recovery unit 42 Pump 44 Expander 45 Power recovery unit (generator)
46 condenser 48 working medium flow path 48a connection end 49 branch flow path 49a connection end 50 cooling flow path 50a connection end 51 branch flow path 51a connection end 110 second compressor 120 second heat exchanger 122 gas flow Path 124 First flow path 124a, 124b Connection end 126 Second flow path 126a, 126b Connection end 130 Third flow path

Claims (11)

A compressor for compressing the gas;
A heat exchanger that recovers the heat of the compressed gas discharged from the compressor;
With
The heat exchanger is
A gas flow path through which the compressed gas passes;
A first flow path having connecting ends at both ends;
A second flow path having connecting ends at both ends;
It has a shape that can be detachably connected to one connection end of the first flow path and one connection end of the second flow path so that the first flow path and the second flow path communicate with each other. A third flow path;
With
A first mode in which the first flow path, the second flow path, and the third flow path are connected to a cooling flow path through which a cooling fluid flows;
In a state where the third flow path is removed, the first flow path is connected to the working medium flow path through which the working medium that recovers the heat of the compressed gas and drives the expander flows, and is connected to the cooling flow path. A second mode in which the second flow path is connected;
A compression device that can be switched between. The compression device according to claim 1.
The compression device, wherein the third flow path is located outside a housing of the heat exchanger that houses the gas flow path, the first flow path, and the second flow path. A compressor for compressing the gas;
A heat exchanger that recovers the heat of the compressed gas discharged from the compressor;
With
The heat exchanger is
A gas flow path through which the compressed gas passes;
A first flow path having connection ends at both ends and connectable to a working medium flow path through which a working medium that recovers heat of the compressed gas and drives the expander flows;
A second flow path connected to the cooling flow path through which the cooling fluid flows;
A closing member that is detachably connected to the connection end portions at both ends of the first flow path and closes the first flow path before the first flow path is connected to the working medium flow path. When,
A compression device. The compression apparatus according to any one of claims 1 to 3,
The working medium flow path, the expander, a power recovery unit connected to the expander, a condenser for condensing the working medium flowing out from the expander, and the working medium condensed in the condenser And a pump that sends a working medium to a heat exchanger, and further comprising a thermal energy recovery unit in which the pump, the heat exchanger, the expander, and the condenser are connected to the working medium flow path. The compression apparatus according to any one of claims 1 to 4,
The first flow path is a compression device that is disposed upstream of the second flow path in the heat exchanger. The compression apparatus according to any one of claims 1 to 5,
The gas flow path is an internal space of the housing of the heat exchanger;
The compression device, wherein the first flow path and the second flow path are tubes extending while meandering in the internal space. The compression apparatus according to claim 6, wherein
A compression device, wherein a plurality of fins are formed on an outer surface of the first channel and an outer surface of the second channel. It is the switching method of the aspect of the compression apparatus of Claim 1 or 2, Comprising:
When switching from the first aspect to the second aspect,
The expander, a condenser that condenses the working medium flowing out of the expander, a pump that sends the working medium condensed in the condenser to the heat exchanger, the pump, the expander, and the condenser A preparation step of preparing an assembly having the working medium flow path to be connected;
A removal step of removing the third flow path from the first flow path and the second flow path;
Connection end portions at both ends of the working medium flow path are respectively connected to connection end portions at both ends of the first flow path, and connection end portions at both ends of the cooling flow path are connected to both ends of the second flow path. A connecting step for connecting to each end;
A switching method comprising: The switching method according to claim 8,
The switching method further comprising a removing step of removing the cooling fluid that has flowed in the first flow path between the removing step and the connecting step. A method of assembling the compression device according to claim 3,
The expander, a condenser that condenses the working medium flowing out of the expander, a pump that sends the working medium condensed in the condenser to the heat exchanger, the pump, the expander, and the condenser A first preparation step of preparing an assembly having the working medium flow path to be connected;
A removal step of removing the blocking member from the first flow path;
Connection end portions at both ends of the working medium flow path are respectively connected to connection end portions at both ends of the first flow path, and connection end portions at both ends of the cooling flow path are connected to both ends of the second flow path. A connecting step for connecting to each end;
An assembly method comprising: The assembly method according to claim 10, wherein
Assembling the compressor and the heat exchanger, further comprising a second preparation step of closing the first flow path of the heat exchanger by the closing member,
An assembly method, wherein the first preparation step and the second preparation step are performed at an assembly facility, and the removal step and the connection step are performed at an installation site of the compression device.

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