JP2020051398A - Rankine cycle system - Google Patents

Rankine cycle system Download PDF

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JP2020051398A
JP2020051398A JP2018184009A JP2018184009A JP2020051398A JP 2020051398 A JP2020051398 A JP 2020051398A JP 2018184009 A JP2018184009 A JP 2018184009A JP 2018184009 A JP2018184009 A JP 2018184009A JP 2020051398 A JP2020051398 A JP 2020051398A
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working fluid
evaporator
pipe
expander
exhaust
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JP7334405B2 (en
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晃太 加藤
Kota Kato
晃太 加藤
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Isuzu Motors Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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    • Y02T10/12—Improving ICE efficiencies

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Abstract

To provide a Rankine cycle system which can restrain reduction of power which can be output by an expander.SOLUTION: A Rankine cycle system 1 includes an evaporator 3 for exchanging heat between exhaust gas G passing through an exhaust pipe 5 and working fluid W, and an expander 4 for expanding the working fluid W which has exchanged heat with the exhaust gas G in the evaporator 3 so as to output power. The exhaust gas G flowing through the exhaust pipe 5 upstream of the evaporator 3 and the working fluid W are heat-exchanged in a temperature adjustment portion 2b which is at least a part between an outlet of the evaporator 3 and an inlet of the expander 4 in working fluid piping 2 which allows the working fluid W to flow therethrough.SELECTED DRAWING: Figure 1

Description

本開示は、ランキンサイクルシステムに関する。   The present disclosure relates to a Rankine cycle system.

エンジンの排気のエネルギーの一部を回収して、この回収したエネルギーによりエンジンに接続する膨張器を駆動させて、この駆動力をエンジンのアシストに使用するランキンサイクルシステムが提案されている（例えば、特許文献１参照）。   A Rankine cycle system that recovers a part of the energy of the exhaust of an engine, drives an expander connected to the engine with the recovered energy, and uses the driving force to assist the engine has been proposed (for example, Patent Document 1).

特開２０１８―１７２０３号公報JP 2018-17203 A

上記のランキンサイクルシステムでは、このシステム内の蒸発器の出口と膨張器の入口の間の作動流体用の配管が外気に曝されているため、作動流体がこの配管を通過中に外気で冷却され、膨張器で出力可能な動力が低減する。   In the Rankine cycle system described above, the piping for the working fluid between the outlet of the evaporator and the inlet of the expander in the system is exposed to the outside air, so that the working fluid is cooled by the outside air while passing through this piping. The power that can be output by the expander is reduced.

本開示は、膨張器で出力可能な動力の低減を抑制することができるランキンサイクルシステムを提供することにある。   An object of the present disclosure is to provide a Rankine cycle system that can suppress a reduction in power that can be output by an expander.

上記の目的を達成するための本発明の態様のランキンサイクルシステムは、内燃機関の排気管を通過する排気と作動流体を熱交換させる蒸発器と、前記蒸発器で排気と熱交換した作動流体を膨張させて動力を出力する膨張器と、を備えて構成されるランキンサイクルシステムにおいて、作動流体を内部に通過させる作動流体用配管における、前記蒸発器の出口と前記膨張器の入口の間の少なくとも一部である温度調整部で、前記蒸発器よりも上流の前記排気管を流れる排気と作動流体を熱交換させる。   To achieve the above object, the Rankine cycle system according to an aspect of the present invention includes an evaporator that performs heat exchange between an exhaust gas that passes through an exhaust pipe of an internal combustion engine and a working fluid, and a working fluid that exchanges heat with the exhaust gas by the evaporator. An expander that outputs power by expanding, in a Rankine cycle system configured to include a working fluid pipe through which a working fluid passes, at least between an outlet of the evaporator and an inlet of the expander. A part of the temperature control unit exchanges heat between the exhaust fluid flowing through the exhaust pipe upstream of the evaporator and the working fluid.

本開示によれば、膨張器で出力可能な動力の低減を抑制することができる。   According to the present disclosure, it is possible to suppress a reduction in power that can be output by the expander.

第１実施形態のランキンサイクルシステムを例示する図である。It is a figure which illustrates the Rankine cycle system of a 1st embodiment. 第２実施形態のランキンサイクルシステムを例示する図である。It is a figure which illustrates the Rankine cycle system of a 2nd embodiment.

以下、本開示のランキンサイクルシステムについて、図面を参照しながら説明する。図１に例示するように、第１実施形態のランキンサイクルシステム１はその作動流体用の流路（作動流体用配管）２に、タンクと、ポンプと、蒸発器３と、膨張器４と、凝縮器と、を備えて構成されるシステムである。   Hereinafter, the Rankine cycle system of the present disclosure will be described with reference to the drawings. As illustrated in FIG. 1, a Rankine cycle system 1 according to the first embodiment includes a tank, a pump, an evaporator 3, an expander 4 in a working fluid flow path (working fluid pipe) 2. And a condenser.

作動流体用の流路２は、作動流体Ｗを循環させる閉流路である。タンクは、作動流体用の流路２に配置されて作動流体Ｗを貯留する装置である。ポンプは、タンクより下流側の作動流体用の流路２に配置されて、タンクから流入した作動流体Ｗに流路２の循環用の駆動力を付与する装置である。蒸発器３は、ポンプより下流側の作動流体用の流路２に配置されて、エンジン（内燃機関）の排気管５を通過する排気Ｇと作動流体Ｗを熱交換させる装置である。この熱交換により作動流体Ｗの大部分は排気Ｇで加熱されて蒸発する。膨張器４は、蒸発器３より下流側の作動流体用の流路２に配置されて、蒸発器３で排気Ｇと熱交換した作動流体Ｗを膨張させて動力を出力する装置である。膨張器４の出力軸４ａには断接装置（クラッチ等）を介して駆動装置（エンジンやモータ等）が接続されており、断接装置の接続時に作動流体Ｗの膨張により出力軸４ａに発生した動力が駆動装置に伝達される。凝縮器は、膨張器４より下流側で、かつ、タンクより上流側の作動流体用の流路２に配置されて作動流体Ｗを凝縮させる装置である。   The working fluid channel 2 is a closed channel that circulates the working fluid W. The tank is a device that is disposed in the working fluid flow path 2 and stores the working fluid W. The pump is a device that is arranged in the flow path 2 for the working fluid downstream of the tank, and applies a driving force for circulating the flow path 2 to the working fluid W flowing from the tank. The evaporator 3 is a device that is disposed in the working fluid flow path 2 downstream of the pump and exchanges heat between the exhaust G passing through the exhaust pipe 5 of the engine (internal combustion engine) and the working fluid W. Due to this heat exchange, most of the working fluid W is heated by the exhaust gas G and evaporates. The expander 4 is a device that is disposed in the working fluid flow path 2 downstream of the evaporator 3 and expands the working fluid W that has exchanged heat with the exhaust gas G in the evaporator 3 to output power. A drive device (engine, motor, etc.) is connected to the output shaft 4a of the expander 4 via a connection / disconnection device (clutch, etc.), and is generated on the output shaft 4a by expansion of the working fluid W when the connection / disconnection device is connected. The generated power is transmitted to the driving device. The condenser is a device that is disposed in the working fluid flow path 2 downstream of the expander 4 and upstream of the tank to condense the working fluid W.

本実施形態のランキンサイクルシステム１では、作動流体Ｗを内部に通過させる作動流体用配管２における、蒸発器３の出口と膨張器４の入口の間の配管２ａの少なくとも一部の配管である温度調整部２ｂで、蒸発器３よりも上流の排気管５を流れる排気Ｇと作動流体Ｗを熱交換させる。   In the Rankine cycle system 1 of the present embodiment, the temperature of at least a part of the pipe 2 a between the outlet of the evaporator 3 and the inlet of the expander 4 in the working fluid pipe 2 that allows the working fluid W to pass therethrough. The adjusting section 2b exchanges heat between the exhaust gas G flowing through the exhaust pipe 5 upstream of the evaporator 3 and the working fluid W.

第１実施形態のランキンサイクルシステム１では、図１に例示するように、温度調整部２ｂを蒸発器３よりも上流の排気管５で覆うように構成する。温度調整部２ｂの内部を通過する作動流体Ｗは、温度調整部２ｂを覆った排気管５を流れる排気Ｇと熱交換する。蒸発器３の出口と膨張器４の入口の間の配管２ａにおける温度調整部２ｂの範囲は、膨張器４の入口を通過する作動流体Ｗの温度が蒸発器３の出口を通過する作動流体Ｗの温度を超えるように設定される。   In the Rankine cycle system 1 according to the first embodiment, as illustrated in FIG. 1, the temperature adjustment unit 2 b is configured to be covered by an exhaust pipe 5 upstream of the evaporator 3. The working fluid W passing through the inside of the temperature adjustment unit 2b exchanges heat with the exhaust gas G flowing through the exhaust pipe 5 covering the temperature adjustment unit 2b. The range of the temperature control unit 2b in the pipe 2a between the outlet of the evaporator 3 and the inlet of the expander 4 is such that the temperature of the working fluid W passing through the inlet of the expander 4 is equal to the working fluid W passing through the outlet of the evaporator 3. Is set to exceed the temperature of

蒸発器３の出口と膨張器４の入口の間の作動流体用の配管２ａに関して、温度調整部２ｂは一続きの配管であるが、この配管２ｂはその形状に応じて配管２ｂａと配管２ｂｂとに分けられる。配管２ｂａは、排気管５の断面に関してその中央部を排気Ｇの通過方向に排気管５の第１外壁面５ａから延在して形成される配管である。配管２ｂｂは、第１外壁面５ａとは逆側の配管２ａａの一端２ｃに連通するとともに排気管５の径方向に排気管５の第２外壁面５ｂまで延在して形成される配管である。   Regarding the pipe 2a for the working fluid between the outlet of the evaporator 3 and the inlet of the expander 4, the temperature control section 2b is a continuous pipe, and the pipe 2b is formed of a pipe 2ba and a pipe 2bb depending on the shape. Divided into The pipe 2ba is a pipe formed so as to extend from a first outer wall surface 5a of the exhaust pipe 5 at a central portion of the cross section of the exhaust pipe 5 in a direction in which the exhaust gas G passes. The pipe 2bb is a pipe that communicates with one end 2c of the pipe 2aa on the opposite side of the first outer wall surface 5a and extends in the radial direction of the exhaust pipe 5 to the second outer wall surface 5b of the exhaust pipe 5. .

配管２ｂａを排気管５の断面に関してその中央部を排気Ｇの通過方向に延在して形成することで、排気管５の断面に関してその外周部を通過する排気Ｇと比較して高温の排気Ｇと作動流体Ｗを熱交換させることができる。それ故、作動流体Ｗの昇温性能が向上する。また、配管２ｂａに連通する配管２ｂｂを排気管５の径方向に延在して形成することで、膨張器４への配管２ｂの連結が容易になる。   By forming the pipe 2ba at the center of the cross section of the exhaust pipe 5 so as to extend in the direction in which the exhaust G passes, the exhaust G having a higher temperature than the exhaust G passing through the outer circumference of the cross section of the exhaust pipe 5 is formed. And the working fluid W can exchange heat. Therefore, the temperature raising performance of the working fluid W is improved. Further, by forming the pipe 2bb communicating with the pipe 2ba in the radial direction of the exhaust pipe 5, the connection of the pipe 2b to the expander 4 becomes easy.

第２実施形態のランキンサイクルシステム１では、図２に例示するように、排気管５に蒸発器３をバイパスするバイパス管６を設けて、温度調整部２ｂをバイパス管６で覆うように構成する。第１実施形態とは、温度調整部２ｂを排気管５ではなくバイパス管６で覆う点で異なり、その他の点で同じである。温度調整部２ｂの内部を通過する作動流体Ｗは、温度調整部２ｂを覆ったバイパス管６を流れる排気Ｇと熱交換する。バイパス管６を流れる排気Ｇは蒸発器３よりも上流の排気管５を流れる排気Ｇの一部に相当する。蒸発器３の出口と膨張器４の入口の間の配管２ａにおける温度調整部２ｂの範囲は、膨張器４の入口を通過する作動流体Ｗの温度が蒸発器３の出口を通過する作動流体Ｗの温度を超えるように設定される。   In the Rankine cycle system 1 of the second embodiment, as illustrated in FIG. 2, the exhaust pipe 5 is provided with a bypass pipe 6 that bypasses the evaporator 3, and the temperature adjustment unit 2 b is covered with the bypass pipe 6. . The difference from the first embodiment is that the temperature adjustment unit 2b is covered with the bypass pipe 6 instead of the exhaust pipe 5, and the other points are the same. The working fluid W passing through the inside of the temperature adjustment unit 2b exchanges heat with the exhaust gas G flowing through the bypass pipe 6 covering the temperature adjustment unit 2b. The exhaust gas G flowing through the bypass pipe 6 corresponds to a part of the exhaust gas G flowing through the exhaust pipe 5 upstream of the evaporator 3. The range of the temperature control unit 2b in the pipe 2a between the outlet of the evaporator 3 and the inlet of the expander 4 is such that the temperature of the working fluid W passing through the inlet of the expander 4 is equal to the working fluid W passing through the outlet of the evaporator 3. Is set to exceed the temperature of

第１、２実施形態のランキンサイクルシステム１では、作動流体Ｗは蒸発器３で排気Ｇと熱交換することでその大部分は加熱されて蒸発する。排気Ｇと熱交換して蒸発器３の出口より流出した作動流体Ｗは、蒸発器３より上流側の排気管５（またはバイパス管６）を通過する排気Ｇと熱交換して昇温して膨張器４の入口に流入する。膨張器４に流入した作動流体Ｗは膨張してその出力軸４ａに動力を出力する。   In the Rankine cycle system 1 of the first and second embodiments, the working fluid W exchanges heat with the exhaust gas G in the evaporator 3, and the working fluid W is mostly heated and evaporated. The working fluid W that has exchanged heat with the exhaust gas G and has flowed out of the outlet of the evaporator 3 heat exchanges with the exhaust gas G that passes through the exhaust pipe 5 (or the bypass pipe 6) upstream of the evaporator 3 to increase the temperature. It flows into the inlet of the expander 4. The working fluid W that has flowed into the expander 4 expands and outputs power to its output shaft 4a.

本実施形態（第１、２実施形態）のランキンサイクルシステム１によれば、蒸発器３の出口と膨張器４の入口の間の作動流体用の配管２ａの少なくとも一部である温度調整部２ｂで、蒸発器３よりも上流の排気管５を流れる排気Ｇ（または、この排気Ｇの一部であるバイパス管６を流れる排気Ｇ）と作動流体Ｗを熱交換させる。これにより、蒸発器３を通過後の作動流体Ｗを蒸発器３よりも上流の排気管５を流れる排気Ｇと熱交換してさらに昇温させることができるので、膨張器４で出力可能な動力の低減を抑制することができる。また、温度調整部２ｂで作動流体Ｗをさらに昇温させることで、蒸発器３で未蒸発となった作動流体Ｗの蒸発を促進することができる。   According to the Rankine cycle system 1 of the present embodiment (first and second embodiments), the temperature adjustment unit 2b which is at least a part of the working fluid pipe 2a between the outlet of the evaporator 3 and the inlet of the expander 4. Then, heat is exchanged between the exhaust gas G flowing through the exhaust pipe 5 upstream of the evaporator 3 (or the exhaust gas G flowing through the bypass pipe 6 which is a part of the exhaust gas G) and the working fluid W. This allows the working fluid W after passing through the evaporator 3 to exchange heat with the exhaust gas G flowing through the exhaust pipe 5 upstream of the evaporator 3 to further raise the temperature. Can be suppressed. Further, by further raising the temperature of the working fluid W by the temperature adjusting unit 2b, the evaporation of the working fluid W which has not been evaporated in the evaporator 3 can be promoted.

なお、この構成は、蒸発器３の出口と膨張器４の入口の間の作動流体用の配管２ａを断熱材で覆って外気を遮断する構成のように作動流体Ｗを保温するものではなく、作動流体Ｗをさらに昇温させるものである。したがって、膨張器４で出力可能な動力は比較的大きくなる。   Note that this configuration does not keep the working fluid W warm as in the configuration in which the working fluid pipe 2a between the outlet of the evaporator 3 and the inlet of the expander 4 is covered with a heat insulating material to block outside air. The temperature of the working fluid W is further increased. Therefore, the power that can be output from the expander 4 is relatively large.

また、この構成は、蒸発器３の出口と膨張器４の入口の間の作動流体用の配管２ａをヒータ等の加熱装置で覆うとともに加熱装置の加熱量を制御しながら配管２ａを加熱する構成とは異なり、制御が不要で簡易な構成である。   Further, this configuration covers the working fluid pipe 2a between the outlet of the evaporator 3 and the inlet of the expander 4 with a heating device such as a heater and heats the piping 2a while controlling the heating amount of the heating device. Unlike this, it is a simple configuration that does not require control.

第１実施形態のように温度調整部２ｂを蒸発器３よりも上流の排気管５で覆う場合には、第２実施形態と比較してバイパス管６の設置スペースが不要となるので省スペースである。第２実施形態のように温度調整部２ｂをバイパス管６で覆う場合には、第１実施形態と比較してバイパス管６を新たに設けるので、バイパス管６で覆われる温度調整部２ｂの範囲を比較的容易に大きくすることができる。   When the temperature control section 2b is covered with the exhaust pipe 5 upstream of the evaporator 3 as in the first embodiment, the installation space for the bypass pipe 6 is not required as compared with the second embodiment, so that the space can be saved. is there. When the temperature adjustment unit 2b is covered with the bypass pipe 6 as in the second embodiment, since the bypass pipe 6 is newly provided as compared with the first embodiment, the range of the temperature adjustment unit 2b covered with the bypass pipe 6 is different. Can be increased relatively easily.

温度調整部２ｂの内壁面または外壁面にフィンを設けて、作動流体Ｗと排気Ｇの熱交換性能を向上させると好ましい。   It is preferable to provide fins on the inner wall surface or the outer wall surface of the temperature control unit 2b to improve the heat exchange performance between the working fluid W and the exhaust gas G.

温度調整部２ｂの内壁面（外壁面）にフィンを複数個配置する場合、これらのフィンを作動流体Ｗ（排気Ｇ）の流れの方向に対して配置してもよいし、これらのフィンを温度調整部２ｂの同一断面に対して配置してもよい。あるいは、これらのフィンの配置を組み合わせてもよい。   When a plurality of fins are arranged on the inner wall surface (outer wall surface) of the temperature control section 2b, these fins may be arranged in the direction of the flow of the working fluid W (exhaust G), or these fins may be arranged at different temperatures. You may arrange | position with respect to the same cross section of the adjustment part 2b. Alternatively, these fin arrangements may be combined.

温度調整部２ｂの内壁面または外壁面に対して、上記のフィンの配置を組み合わせてもよい。また、排気Ｇの流れの方向に対してフィンを複数個配置する場合は、上流側のフィンの表面積よりも下流側のフィンの表面積を大きくしてもよい。   The above-described arrangement of the fins may be combined with the inner wall surface or the outer wall surface of the temperature control unit 2b. When a plurality of fins are arranged in the direction of the flow of the exhaust gas G, the surface area of the downstream fin may be larger than the surface area of the upstream fin.

また、温度調整部２ｂの断面形状を通常の配管の断面形状（例えば円形状）よりも表面積の大きい形状（例えば花弁形状）とする。この構成によれば、比較的大きな排気Ｇの熱量が温度調整部２ｂの壁面を介して作動流体Ｗに伝熱されるので、作動流体Ｗと排気Ｇの熱交換性能を向上させることができる。   Further, the cross-sectional shape of the temperature adjustment section 2b is set to a shape (for example, a petal shape) having a larger surface area than the cross-sectional shape (for example, a circular shape) of a normal pipe. According to this configuration, a relatively large amount of heat of the exhaust gas G is transmitted to the working fluid W via the wall surface of the temperature adjustment unit 2b, so that the heat exchange performance between the working fluid W and the exhaust gas G can be improved.

第１実施形態のように、温度調整部２ｂを排気Ｇの通過方向に延在する配管２ｂａと排気Ｇの径方向に延在する配管２ｂｂで構成する場合には、配管２ｂａの壁面の表面積が配管２ｂｂの壁面の表面積より大きい構成にすると好ましい。例えば、配管２ｂａの長さを配管２ｂｂの長さよりも長くすることや、配管２ｂａを少なくとも１回以上屈曲させた形状（折り返し形状、らせん形状等）にすることが好ましい。   As in the first embodiment, when the temperature adjustment unit 2b is configured by the pipe 2ba extending in the passage direction of the exhaust G and the pipe 2bb extending in the radial direction of the exhaust G, the surface area of the wall surface of the pipe 2ba is reduced. It is preferable to make the configuration larger than the surface area of the wall surface of the pipe 2bb. For example, it is preferable that the length of the pipe 2ba be longer than the length of the pipe 2bb or that the pipe 2ba be bent at least once (a folded shape, a spiral shape, or the like).

このように構成することで、配管の外周部を通過する排気Ｇと比較して高温である配管の中央部を通過する排気Ｇと作動流体Ｗの熱交換を促進するので、作動流体Ｗの昇温を促進することができる。   With this configuration, heat exchange between the working fluid W and the exhaust G passing through the central portion of the pipe, which has a higher temperature than that of the exhaust G passing through the outer peripheral portion of the pipe, is promoted. Can promote warmth.

１ ランキンサイクルシステム
２ 作動流体用の流路（配管）
２ａ 蒸発器の出口と膨張器の入口の間の作動流体用の配管
２ｂ 温度調整部
３ 蒸発器
４ 膨張器
４ａ 膨張器の出力軸
５ 排気管
６ バイパス管 1 Rankine cycle system 2 Flow path (piping) for working fluid
2a Piping for working fluid between outlet of evaporator and inlet of expander 2b Temperature controller 3 Evaporator 4 Expander 4a Output shaft of expander 5 Exhaust pipe 6 Bypass pipe

Claims (2)

内燃機関の排気管を通過する排気と作動流体を熱交換させる蒸発器と、前記蒸発器で排気と熱交換した作動流体を膨張させて動力を出力する膨張器と、を備えて構成されるランキンサイクルシステムにおいて、
作動流体を内部に通過させる作動流体用配管における、前記蒸発器の出口と前記膨張器の入口の間の少なくとも一部である温度調整部で、前記蒸発器よりも上流の前記排気管を流れる排気と作動流体を熱交換させるランキンサイクルシステム。 Rankine configured to include an evaporator for exchanging heat between an exhaust gas passing through an exhaust pipe of an internal combustion engine and a working fluid, and an expander for expanding the working fluid that has exchanged heat with the exhaust gas by the evaporator to output power. In the cycle system,
Exhaust flowing through the exhaust pipe upstream of the evaporator, at a temperature adjusting unit that is at least a part between an outlet of the evaporator and an inlet of the expander in a working fluid pipe that allows a working fluid to pass therethrough. Rankine cycle system that exchanges heat with the working fluid. 前記温度調整部の内壁面または外壁面にフィンを設けて構成される請求項１に記載のランキンサイクルシステム。   The Rankine cycle system according to claim 1, wherein a fin is provided on an inner wall surface or an outer wall surface of the temperature control unit.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012522920A (en) * 2009-03-25 2012-09-27 フォルシア システム デシャップマン Exhaust line for automobile with closed closed cycle for exhaust gas thermal energy, and accompanying control method
JP2012189059A (en) * 2011-03-14 2012-10-04 Toyota Industries Corp Waste heat recovery apparatus
JP2017141692A (en) * 2016-02-08 2017-08-17 トヨタ自動車株式会社 Waste heat recovery device
JP2018017204A (en) * 2016-07-29 2018-02-01 いすゞ自動車株式会社 Rankine cycle system of vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012522920A (en) * 2009-03-25 2012-09-27 フォルシア システム デシャップマン Exhaust line for automobile with closed closed cycle for exhaust gas thermal energy, and accompanying control method
JP2012189059A (en) * 2011-03-14 2012-10-04 Toyota Industries Corp Waste heat recovery apparatus
JP2017141692A (en) * 2016-02-08 2017-08-17 トヨタ自動車株式会社 Waste heat recovery device
JP2018017204A (en) * 2016-07-29 2018-02-01 いすゞ自動車株式会社 Rankine cycle system of vehicle

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