JP2000149969A - Fuel cell power generator - Google Patents
Fuel cell power generatorInfo
- Publication number
- JP2000149969A JP2000149969A JP11143012A JP14301299A JP2000149969A JP 2000149969 A JP2000149969 A JP 2000149969A JP 11143012 A JP11143012 A JP 11143012A JP 14301299 A JP14301299 A JP 14301299A JP 2000149969 A JP2000149969 A JP 2000149969A
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- fuel cell
- power generator
- circulation pump
- cell power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Fuel Cell (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電気化学反応を用
いて電気エネルギーを得る燃料電池発電装置に係わり、
特に燃料電池本体の冷却に用いられる電池冷却系の構成
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel cell power generator for obtaining electric energy using an electrochemical reaction,
In particular, the present invention relates to a configuration of a cell cooling system used for cooling a fuel cell body.
【０００２】[0002]
【従来の技術】図３は、従来の燃料電池発電装置の電池
冷却水系統の基本構成を示すフロー図である。図におい
て、１は模式的に表示した燃料電池本体であり、燃料極
１ａ、空気極１ｂ、およびこれらを所定温度に保持する
ための電池冷却機構１ｃよりなる。また、２は水蒸気分
離器、３は冷却水循環ポンプ、４は流量調節弁、５は外
部冷却水により冷却される熱交換器、７はオリフィス、
８は外部より低温の補給水を供給するための補給水給水
ポンプである。2. Description of the Related Art FIG. 3 is a flowchart showing a basic configuration of a battery cooling water system of a conventional fuel cell power generator. In the drawing, reference numeral 1 denotes a fuel cell main body schematically shown, comprising a fuel electrode 1a, an air electrode 1b, and a cell cooling mechanism 1c for maintaining these at a predetermined temperature. 2 is a steam separator, 3 is a cooling water circulation pump, 4 is a flow control valve, 5 is a heat exchanger cooled by external cooling water, 7 is an orifice,
Reference numeral 8 denotes a make-up water supply pump for supplying low-temperature make-up water from the outside.
【０００３】本電池冷却水系統では、発電に伴って燃料
電池本体１で生じる発熱を受けて電池冷却機構１ｃより
排出される高温の気液二相流を、水蒸気分離器２に導入
して水蒸気と冷却水とに分離し、分離された冷却水を冷
却水循環ポンプ３の吸込み側へ送り、吐出した冷却水を
熱交換器５に通流させて冷却し、再び電池冷却水として
電池冷却機構１ｃへ供給している。このとき、温度計６
の検知信号によって流量調節弁４を制御することにより
熱交換器５に通流させる水量を調節し、電池冷却機構１
ｃへの電池供給水の温度を調整している。また、水蒸気
分離器２において分離された水蒸気は燃料ガスの改質用
水蒸気として取出されるので、取出される水蒸気量を補
って水位を一定に保持するために、補給水給水ポンプ８
と流量調節弁９とを備えた補給水供給ラインより、低温
の補給水を流量制御して連続的に補給している。In the present battery cooling water system, a high-temperature gas-liquid two-phase flow discharged from the battery cooling mechanism 1c in response to heat generated in the fuel cell main body 1 due to power generation is introduced into the steam separator 2 and The cooling water is sent to the suction side of the cooling water circulation pump 3, and the discharged cooling water is passed through the heat exchanger 5 for cooling. The battery cooling mechanism 1c is again used as battery cooling water. To supply. At this time, thermometer 6
By controlling the flow control valve 4 in accordance with the detection signal, the amount of water flowing through the heat exchanger 5 is adjusted, and the battery cooling mechanism 1 is controlled.
The temperature of the water supplied to the battery c is adjusted. Further, since the steam separated in the steam separator 2 is taken out as the steam for reforming the fuel gas, the make-up water feed pump 8 is used to supplement the amount of the taken out steam and keep the water level constant.
A low-temperature make-up water is supplied continuously by controlling the flow rate from a make-up water supply line provided with a flow control valve 9.
【０００４】[0004]
【発明が解決しようとする課題】上記の構成において
は、冷却水循環ポンプ３の吸込み側へ水蒸気分離器２で
分離された高温の冷却水が導入されるので、冷却水循環
ポンプ３でキャビテイションが生じるのを防止するため
には、低温の水を同時に導入して吸込む水の温度を常時
低温度に保持するか、あるいは、正味吸込み水頭（ＮＰ
ＳＨ）、すなわち水蒸気分離器２の水位と冷却水循環ポ
ンプ３の吸込み口の高低差を十分にとることが必要とな
る。これに対し、上記の構成では、補給水供給ラインよ
り低温の補給水を供給しているが、補給水は制御上一時
的に断となる場合があり、この場合にはキャビテーショ
ンが生じてしまうため、水蒸気分離器２を相対的に高い
位置に配置して所定のＮＰＳＨが得られるよう構成して
いる。しかしながら、このように構成すると燃料電池発
電装置の高さが高くなり、装置高さを屋内設置型の燃料
電池発電装置で要求されている装置高さ、例えば2.5ｍ
以下に抑えることが極めて困難となり、市場性のあるコ
ンパクトな燃料電池発電装置を製作する際の問題点とな
っている。 また、上記の構成では、冷却水循環ポンプ
３より吐出された水を流量調節弁４、熱交換器５を通流
させて電池冷却機構１ｃへ供給しているので圧力損失が
大きく、冷却水循環ポンプ３の吐出圧を高くして使用し
なければならないという難点があった。In the above configuration, since the high-temperature cooling water separated by the steam separator 2 is introduced into the suction side of the cooling water circulation pump 3, cavitation occurs in the cooling water circulation pump 3. In order to prevent this, the temperature of the water to be sucked by simultaneously introducing low-temperature water is kept at a low temperature, or the net suction head (NP
SH), that is, it is necessary to take a sufficient level difference between the water level of the steam separator 2 and the suction port of the cooling water circulation pump 3. On the other hand, in the above configuration, although low-temperature make-up water is supplied from the make-up water supply line, make-up water may be temporarily cut off for control, and in this case, cavitation occurs. The steam separator 2 is arranged at a relatively high position to obtain a predetermined NPSH. However, when configured in this manner, the height of the fuel cell power generator increases, and the height of the apparatus is set to an apparatus height required for an indoor-installed fuel cell power generator, for example, 2.5 m.
It is extremely difficult to suppress the temperature to below, which is a problem in producing a compact fuel cell power generator with marketability. Further, in the above configuration, the water discharged from the cooling water circulation pump 3 is supplied to the battery cooling mechanism 1c by flowing through the flow control valve 4 and the heat exchanger 5, so that the pressure loss is large and the cooling water circulation pump 3 Has to be used at a high discharge pressure.
【０００５】この発明の目的は、上記のごとき従来技術
の問題点を解消し、燃料電池本体へ冷却水が安定して循
環供給される冷却水循環供給系を備え、かつ、装置高さ
が低く、特に屋内設置型として効果的な燃料電池発電装
置を提供することにある。An object of the present invention is to solve the above-mentioned problems of the prior art, to provide a cooling water circulating supply system for stably supplying cooling water to the fuel cell body, and to reduce the height of the apparatus, In particular, it is an object of the present invention to provide a fuel cell power generation device that is effective as an indoor installation type.
【０００６】[0006]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明においては、電池冷却機構を組み込んだ燃
料電池本体と、この電池冷却機構から排出される二相流
を導入して水蒸気と冷却水とに分離する水蒸気分離器
と、この水蒸気分離器に貯えられた冷却水を上記の電池
冷却機構へ循環供給する、冷却水循環ポンプを組み込ん
だ冷却水循環供給系とを備える燃料電池発電装置におい
て、 （１）上記の冷却水循環供給系に、冷却水循環ポンプよ
り吐出される冷却水の一部を、電池冷却機構へ供給する
電池冷却水と分岐させて冷却水循環ポンプの吸込み側へ
と循環させる循環回路を備え、かつ、この循環回路に、
外部より供給される外部冷却水で冷却される熱交換器と
流量調節弁とを組み込むこととする。In order to achieve the above object, according to the present invention, there is provided a fuel cell body incorporating a cell cooling mechanism, and a two-phase flow discharged from the cell cooling mechanism to introduce steam. Fuel cell power generator comprising: a steam separator that separates water and cooling water; and a cooling water circulation supply system that incorporates a cooling water circulation pump that circulates and supplies the cooling water stored in the steam separator to the battery cooling mechanism. (1) In the cooling water circulation supply system, a part of the cooling water discharged from the cooling water circulation pump is branched off from the battery cooling water supplied to the battery cooling mechanism and circulated to the suction side of the cooling water circulation pump. With a circulation circuit, and in this circulation circuit,
A heat exchanger cooled by external cooling water supplied from outside and a flow control valve are incorporated.
【０００７】（２）さらに、上記（１）において、冷却
水循環供給系に電池冷却機構へ供給される電池冷却水の
温度を検知する温度計を備え、この温度計の検知信号に
よって循環回路に組み込まれた流量調節弁を調整して、
電池冷却機構へ供給される電池冷却水の温度を規定値に
保持することとする。(2) Further, in the above (1), the cooling water circulation supply system includes a thermometer for detecting the temperature of the battery cooling water supplied to the battery cooling mechanism, and is incorporated in the circulation circuit by a detection signal of the thermometer. Adjust the flow control valve
The temperature of the battery cooling water supplied to the battery cooling mechanism is maintained at a specified value.
【０００８】（３）あるいは、上記の冷却水循環供給系
の水蒸気分離器と冷却水循環ポンプの吸込み側との間
に、電池冷却機構へ供給される電池冷却水の一部を分岐
させ、外部循環ポンプで循環させ、外部冷却水で冷却す
る熱交換器で冷却させる外部冷却循環回路を備えること
とする。(3) Alternatively, a part of the battery cooling water supplied to the battery cooling mechanism is branched between the steam separator of the cooling water circulation supply system and the suction side of the cooling water circulation pump, and an external circulation pump is provided. And an external cooling circuit for cooling with a heat exchanger that cools with external cooling water.
【０００９】（４）さらに、上記の（３）において、冷
却水循環供給系に電池冷却機構へ供給される電池冷却水
の温度を検知する温度計を備え、この温度計の検知信号
によって外部冷却循環回路に組み込まれた外部循環ポン
プを制御して、電池冷却機構へ供給される電池冷却水の
温度を規定値に保持することとする。(4) Further, in the above (3), the cooling water circulation supply system is provided with a thermometer for detecting the temperature of the battery cooling water supplied to the battery cooling mechanism. The temperature of the battery cooling water supplied to the battery cooling mechanism is maintained at a specified value by controlling the external circulation pump incorporated in the circuit.
【００１０】（５）またさらに、上記（１）〜（２）に
おいて、上記の冷却水循環供給系の水蒸気分離器と循環
回路との間に、外部より低温の補給水を導入する導入口
を備えることとする。(5) Further, in the above (1) and (2), an inlet for introducing low-temperature make-up water from the outside is provided between the steam separator and the circulation circuit of the cooling water circulation supply system. It shall be.
【００１１】上記（１）のごとくとすれば、冷却水循環
ポンプの吸込み側に、循環回路に組み込まれた熱交換器
により冷却された冷却水が循環供給されるので、冷却水
循環ポンプの吸込み側に入る冷却水は低温に維持され
る。したがって、冷却水循環ポンプは、正味吸込み水頭
（ＮＰＳＨ）、すなわち水蒸気分離器の水位と冷却水循
環ポンプの吸込み口の高低差を大きく採らずとも、キャ
ビテイションを生じることなく安定に作動する。したが
って、本構成とすれば装置高さを低く抑えることができ
る。According to the above (1), the cooling water cooled by the heat exchanger incorporated in the circulation circuit is circulated and supplied to the suction side of the cooling water circulation pump. The incoming cooling water is kept at a low temperature. Therefore, the cooling water circulation pump operates stably without cavitation even if the net suction head (NPSH), that is, the height difference between the water level of the steam separator and the suction port of the cooling water circulation pump is not large. Therefore, with this configuration, the height of the apparatus can be kept low.
【００１２】また、上記（２）のごとくとすれば、規定
温度に保持した電池冷却水が電池冷却機構へ安定して供
給され、燃料電池本体が規定の運転温度に保持されるこ
ととなる。According to the above (2), the battery cooling water maintained at the specified temperature is stably supplied to the battery cooling mechanism, and the fuel cell body is maintained at the specified operating temperature.
【００１３】上記（３）のごとくとすれば、冷却水循環
ポンプの吸込み側に外部冷却循環回路で冷却された低温
の冷却された冷却水が循環供給されるので、冷却水循環
ポンプの吸込み側に入る冷却水は低温に維持される。し
たがって、上記の（１）の場合と同様に、冷却水循環ポ
ンプは、水蒸気分離器の水位と冷却水循環ポンプの吸込
み口の高低差を大きく採らずとも、キャビテイションを
生じることなく安定に作動する。According to the above (3), since the low-temperature cooled cooling water cooled by the external cooling circuit is circulated to the suction side of the cooling water circulation pump, the cooling water enters the suction side of the cooling water circulation pump. Cooling water is maintained at a low temperature. Therefore, as in the case of the above (1), the cooling water circulating pump operates stably without cavitation even if the difference between the water level of the steam separator and the suction port of the cooling water circulating pump is not large.
【００１４】また、上記（４）のごとくとすれば、規定
温度に保持した電池冷却水が電池冷却機構へ安定して供
給され、燃料電池本体が規定の運転温度に保持されるこ
ととなる。According to the above (4), the battery cooling water maintained at the specified temperature is stably supplied to the battery cooling mechanism, and the fuel cell body is maintained at the specified operating temperature.
【００１５】また、上記（５）のごとくとすれば、例え
ば改質用水蒸気のごとく系外に冷却水の一部が取出され
る場合にも、不足分を効果的に補うことが可能となり、
さらに低温の補給水を導入することとすれば、冷却水循
環ポンプの吸込み側に入る冷却水はより低温に維持され
るので、冷却水循環ポンプを一層安定に作動させること
ができる。According to the above (5), even if a part of the cooling water is taken out of the system, for example, as in the case of steam for reforming, the shortage can be effectively compensated for,
If colder make-up water is introduced, the cooling water entering the suction side of the cooling water circulation pump is maintained at a lower temperature, so that the cooling water circulation pump can be operated more stably.
【００１６】[0016]
【発明の実施の形態】＜実施例１＞図１は、本発明によ
る燃料電池発電装置の実施例１の電池冷却水系統の基本
構成を示すフロー図である。本実施例の電池冷却水系統
の特徴は、冷却水循環ポンプ３の吐出側と吸込み側との
間に、流量調節弁４と外部冷却水で冷却する熱交換器５
とを備えた循環回路が配され、冷却水がこの循環回路を
循環して流れるよう構成されている点にある。すなわ
ち、電池冷却水系統では、本冷却水循環ポンプ３より吐
出した冷却水の一部を電池冷却水として燃料電池本体１
の電池冷却機構１ｃへ送り、残余の冷却水は循環回路を
通流させて冷却水循環ポンプ３の吸込み側へ戻し、水蒸
気分離器２より送られる高温の冷却水、および補給水給
水ポンプ８より供給される補給水と合流させて冷却水循
環ポンプ３の吸込み側へ送るよう構成されている。この
とき、電池冷却機構１ｃへ送られる電池冷却水の温度を
検知する温度計６の検知信号により流量調節弁４の開度
を制御し、これによって電池冷却水の流量を調整するこ
とにより、燃料電池本体の温度が発電電流に対応した規
定の温度となるよう調整される。<First Embodiment> FIG. 1 is a flowchart showing a basic configuration of a battery cooling water system of a first embodiment of a fuel cell power generator according to the present invention. The feature of the battery cooling water system of this embodiment is that a flow control valve 4 and a heat exchanger 5 for cooling with external cooling water are provided between the discharge side and the suction side of the cooling water circulation pump 3.
And a cooling circuit is provided so that the cooling water circulates and flows through the circulation circuit. That is, in the battery cooling water system, a part of the cooling water discharged from the main cooling water circulation pump 3 is used as the battery cooling water as the fuel cell main body 1.
The remaining cooling water flows through the circulation circuit and returns to the suction side of the cooling water circulation pump 3, and is supplied from the high-temperature cooling water sent from the steam separator 2 and the makeup water supply pump 8. Is supplied to the suction side of the cooling water circulating pump 3 while being combined with the supplied makeup water. At this time, the opening degree of the flow control valve 4 is controlled by the detection signal of the thermometer 6 for detecting the temperature of the battery cooling water sent to the battery cooling mechanism 1c, thereby adjusting the flow rate of the battery cooling water. The temperature of the battery body is adjusted to a specified temperature corresponding to the generated current.
【００１７】上記のごとく、本構成では、水蒸気分離器
２より送られる高温の冷却水と補給水に加えて、循環回
路の熱交換器５で低温に冷却された循環水が冷却水循環
ポンプ３の吸込み側へ送られるので、吸込まれる冷却水
の温度は常時低温に保持されることとなる。したがっ
て、冷却水循環ポンプ３は、従来例のように正味吸込み
水頭（ＮＰＳＨ）を大きく採らなくとも、また、一時的
に補給水が断となっても、キャビテイションを生じるこ
となく安定して運転できることとなり、本構成の電池冷
却水系統を用いれば、装置高さが低く、屋内設置が可能
な燃料電池発電装置を構成することができる。As described above, in the present configuration, in addition to the high-temperature cooling water and makeup water sent from the steam separator 2, the circulating water cooled to a low temperature by the heat exchanger 5 in the circulation circuit is supplied to the cooling water circulation pump 3. Since the cooling water is sent to the suction side, the temperature of the cooling water to be sucked is always kept at a low temperature. Therefore, the cooling water circulation pump 3 can operate stably without cavitation even if the net suction head (NPSH) is not large as in the conventional example, and even if the supply water is temporarily cut off. By using the battery cooling water system of this configuration, it is possible to configure a fuel cell power generation device having a low device height and capable of being installed indoors.
【００１８】また、本構成では、冷却水循環ポンプ３の
吸込み側の冷却水の温度が常時低温に保持されるので、
軸受けに加わる負担が軽減し、長寿命化が可能となる。
また、従来例の構成と異なり、熱交換器５と流量調節弁
４が冷却水循環ポンプ３と並列に配されているので、系
の圧力損失が低減され、冷却水循環ポンプ３の吐出圧も
低くてよく、より安定に作動するシステムが得られるこ
ととなる。In this configuration, the temperature of the cooling water on the suction side of the cooling water circulating pump 3 is always kept at a low temperature.
The load on the bearing is reduced, and the service life can be extended.
Further, unlike the configuration of the conventional example, since the heat exchanger 5 and the flow control valve 4 are arranged in parallel with the cooling water circulation pump 3, the pressure loss of the system is reduced and the discharge pressure of the cooling water circulation pump 3 is low. A better and more stable system will be obtained.
【００１９】なお、図１に示した構成においては、水蒸
気分離器２より改質用水蒸気として取出される水量を補
うために、水位計２ａの検知信号をＶＶＶＦインバータ
１０へと送り、このＶＶＶＦインバータ１０により補給
水給水ポンプ８の回転数を制御して外部から取り込む補
給水の流量を調整し、水蒸気分離器２の水位を一定に保
持している。In the configuration shown in FIG. 1, in order to supplement the amount of water taken out as steam for reforming from the steam separator 2, a detection signal of the water level meter 2a is sent to the VVVF inverter 10, and the VVVF inverter 10 10 controls the number of revolutions of the make-up water supply pump 8 to adjust the flow rate of make-up water taken in from the outside, and keeps the water level of the steam separator 2 constant.
【００２０】＜実施例２＞図２は、本発明による燃料電
池発電装置の実施例２の電池冷却水系統の基本構成を示
すフロー図である。本実施例の電池冷却水系統の特徴
は、水蒸気分離器２と冷却水循環ポンプ３の吸込み側と
の間に、外部循環ポンプ１１と外部冷却水で冷却する熱
交換器５とを備えた外部冷却循環回路が配されている点
にある。すなわち、本電池冷却水系統においては、電池
冷却水の一部が外部循環ポンプ１１によって外部冷却循
環回路へと分岐され、熱交換器５へと送られて外部冷却
水で冷却されたのち、外部循環ポンプ１１へと送られ
る。また、電池冷却機構１ｃへ送られる電池冷却水の温
度を検知する温度計６の検知信号に基づいて、インバー
タ１０により外部循環ポンプ１１の回転数を制御し、こ
れによって、外部冷却循環回路に循環される水量を調整
して、電池冷却機構１ｃへ送られる電池冷却水の温度を
制御し、燃料電池本体１の温度が発電電流に対応した規
定の温度となるよう調整している。<Embodiment 2> FIG. 2 is a flowchart showing a basic configuration of a battery cooling water system of Embodiment 2 of the fuel cell power generator according to the present invention. The feature of the battery cooling water system of the present embodiment is that an external cooling system including an external circulation pump 11 and a heat exchanger 5 for cooling with external cooling water is provided between the steam separator 2 and the suction side of the cooling water circulation pump 3. The point is that a circulation circuit is provided. That is, in the present battery cooling water system, part of the battery cooling water is branched by the external circulation pump 11 to the external cooling circulation circuit, sent to the heat exchanger 5 and cooled by the external cooling water, and It is sent to the circulation pump 11. In addition, the inverter 10 controls the rotation speed of the external circulation pump 11 based on the detection signal of the thermometer 6 that detects the temperature of the battery cooling water sent to the battery cooling mechanism 1c, and thereby circulates through the external cooling circuit. The temperature of the battery cooling water sent to the battery cooling mechanism 1c is controlled by adjusting the amount of water to be supplied, and the temperature of the fuel cell main body 1 is adjusted to a specified temperature corresponding to the generated current.
【００２１】本構成においても、外部冷却循環回路の熱
交換器５で低温に冷却された循環水が冷却水循環ポンプ
３の吸込み側へ送られるので、吸込まれる冷却水の温度
は常時低温に保持され、冷却水循環ポンプ３は、キャビ
テイションを生じることなく安定して運転できることと
なる。Also in this configuration, the circulating water cooled to a low temperature by the heat exchanger 5 of the external cooling circulation circuit is sent to the suction side of the cooling water circulation pump 3, so that the temperature of the sucked cooling water is always kept at a low temperature. Thus, the cooling water circulation pump 3 can be operated stably without generating cavitation.
【００２２】また、熱交換器５と外部循環ポンプ１１は
電池冷却水系統と並列に配されているので、系統の圧力
損失が低減され、冷却水循環ポンプの吐出圧も低く低く
抑えられるので、より安定に作動するシステムが得られ
ることとなる。Further, since the heat exchanger 5 and the external circulation pump 11 are arranged in parallel with the battery cooling water system, the pressure loss of the system is reduced and the discharge pressure of the cooling water circulation pump can be kept low. A system that operates stably will be obtained.
【００２３】[0023]
【発明の効果】上述のように、本発明によれば、燃料電
池発電装置を、 （１）請求項１あるいは２に記載のごとく構成すること
としたので、燃料電池本体へ電池冷却水を供給する冷却
水循環ポンプ３が、正味吸込み水頭（ＮＰＳＨ）が小さ
くとも、キャビテイションを生じることなく安定して運
転できることとなり、装置高さが低く、特に屋内設置型
として効果的な燃料電池発電装置が得られることとなっ
た。As described above, according to the present invention, (1) the fuel cell power generator is configured as described in claim 1 or 2, so that the cell cooling water is supplied to the fuel cell body. The cooling water circulating pump 3 can operate stably without cavitation even if the net suction head (NPSH) is small, so that the fuel cell power generator having a low device height and particularly effective as an indoor installation type can be obtained. It was decided to be.
【００２４】（２）また、請求項３あるいは４に記載の
ごとく構成することとすれば、同様に低温に冷却された
循環水が冷却水循環ポンプ３の吸込み側へ送られるの
で、冷却水循環ポンプ３を安定して運転できることとな
り、装置高さが低く、特に屋内設置型として効果的な燃
料電池発電装置が得られる。(2) According to the third aspect of the present invention, since the circulating water cooled to a low temperature is similarly sent to the suction side of the cooling water circulating pump 3, the cooling water circulating pump 3 Can be operated stably, and the height of the device is low. In particular, an effective fuel cell power generation device as an indoor installation type can be obtained.
【００２５】（３）また、請求項５に記載のごとく構成
することとすれば、冷却水循環ポンプをより一層安定に
作動させることが可能となるので、装置高さが低く、特
に屋内設置型として効果的な燃料電池発電装置として好
適である。(3) Further, if the cooling water circulation pump is configured as described in claim 5, the cooling water circulation pump can be operated more stably. It is suitable as an effective fuel cell power generator.
【図１】本発明による燃料電池発電装置の実施例１の電
池冷却水系統の基本構成を示すフロー図FIG. 1 is a flowchart showing a basic configuration of a battery cooling water system according to a first embodiment of a fuel cell power generator according to the present invention.
【図２】本発明による燃料電池発電装置の実施例２の電
池冷却水系統の基本構成を示すフロー図FIG. 2 is a flowchart showing a basic configuration of a battery cooling water system according to a second embodiment of the fuel cell power generator according to the present invention.
【図３】従来の燃料電池発電装置の電池冷却水系統の基
本構成を示すフロー図FIG. 3 is a flowchart showing a basic configuration of a battery cooling water system of a conventional fuel cell power generator.
１ 燃料電池本体 １ｃ 電池冷却機構 ２ 水蒸気分離器 ２ａ 水位計 ３ 冷却水循環ポンプ ４ 流量調節弁 ５ 熱交換器 ６ 温度計 ８ 補給水給水ポンプ １０ ＶＶＶＦインバータ １１ 外部循環ポンプ DESCRIPTION OF SYMBOLS 1 Fuel cell main body 1c Battery cooling mechanism 2 Steam separator 2a Water level gauge 3 Cooling water circulation pump 4 Flow control valve 5 Heat exchanger 6 Thermometer 8 Make-up water feed pump 10 VVVF inverter 11 External circulation pump
Claims (5)
と、 該電池冷却機構から排出される二相流を導入して水蒸気
と冷却水とに分離する水蒸気分離器と、 該水蒸気分離器に貯えられた冷却水を前記電池冷却機構
へ循環供給する、冷却水循環ポンプを組み込んだ冷却水
循環供給系を備える燃料電池発電装置において、 前記冷却水循環供給系が、冷却水循環ポンプより吐出さ
れる冷却水の一部を、電池冷却機構へ供給する電池冷却
水と分岐させて、冷却水循環ポンプの吸込み側へと循環
させる循環回路を備え、かつ、該循環回路が、外部より
供給される外部冷却水で冷却される熱交換器と流量調節
弁とを組み込んでなることを特徴とする燃料電池発電装
置。1. A fuel cell body incorporating a cell cooling mechanism, a steam separator for introducing a two-phase flow discharged from the cell cooling mechanism to separate into steam and cooling water, and storing the steam in the steam separator. A cooling water circulation supply system incorporating a cooling water circulation pump, which circulates and supplies the cooled water to the battery cooling mechanism, wherein the cooling water circulation supply system includes one of the cooling water discharged from the cooling water circulation pump. The unit is provided with a circulation circuit that branches off the battery cooling water to be supplied to the battery cooling mechanism and circulates to the suction side of the cooling water circulation pump, and the circulation circuit is cooled by external cooling water supplied from the outside. A fuel cell power generation device comprising a heat exchanger and a flow control valve that are incorporated.
て、前記冷却水循環供給系が、電池冷却機構へ供給され
る電池冷却水の温度を検知する温度計を備え、かつ、循
環回路に組み込まれた流量調節弁が、電池冷却水の温度
が規定値となるよう該温度計の検知信号によって流量を
制御される流量調節弁であることを特徴とする燃料電池
発電装置。2. The fuel cell power generator according to claim 1, wherein the cooling water circulation supply system includes a thermometer for detecting a temperature of battery cooling water supplied to a battery cooling mechanism, and is incorporated in a circulation circuit. A fuel cell power generator, wherein the flow control valve is a flow control valve whose flow is controlled by a detection signal of the thermometer so that the temperature of the battery cooling water becomes a specified value.
と、 該電池冷却機構から排出される二相流を導入して水蒸気
と冷却水とに分離する水蒸気分離器と、 該水蒸気分離器に貯えられた冷却水を前記電池冷却機構
へ循環供給する、冷却水循環ポンプを組み込んだ冷却水
循環供給系を備える燃料電池発電装置において、 前記冷却水循環供給系が、水蒸気分離器と冷却水循環ポ
ンプの吸込み側との間に、電池冷却機構へ供給される電
池冷却水の一部を分岐させ、外部循環ポンプで循環さ
せ、外部冷却水で冷却する熱交換器で冷却させる外部冷
却循環回路を備えたことを特徴とする燃料電池発電装
置。3. A fuel cell main body incorporating a cell cooling mechanism, a steam separator for introducing a two-phase flow discharged from the cell cooling mechanism to separate into steam and cooling water, and storing the steam in the steam separator. In the fuel cell power generator including a cooling water circulation supply system incorporating a cooling water circulation pump, the cooling water circulation supply system includes a steam separator and a suction side of the cooling water circulation pump. A part of the battery cooling water supplied to the battery cooling mechanism is branched, circulated by an external circulation pump, and cooled by a heat exchanger cooled by the external cooling water. Fuel cell power generator.
て、前記冷却水循環供給系が、電池冷却機構へ供給され
る電池冷却水の温度を検知する温度計を備え、かつ、前
記外部冷却循環回路に組み込まれた外部循環ポンプが、
電池冷却水の温度が規定値となるよう該温度計の検知信
号によって流量を制御される外部循環ポンプであること
を特徴とする燃料電池発電装置。4. The fuel cell power generator according to claim 3, wherein said cooling water circulation supply system includes a thermometer for detecting a temperature of battery cooling water supplied to a battery cooling mechanism, and said external cooling circulation system. An external circulation pump built into the circuit
A fuel cell power generator, characterized by being an external circulation pump whose flow rate is controlled by a detection signal of the thermometer so that the temperature of the battery cooling water becomes a specified value.
池発電装置において、前記冷却水循環供給系が、水蒸気
分離器と循環回路との間に、外部より低温の補給水を導
入する導入口を備えてなることを特徴とする燃料電池発
電装置。5. The fuel cell power generator according to claim 1, wherein the cooling water circulating supply system introduces a low-temperature make-up water from the outside between the steam separator and the circulation circuit. A fuel cell power generator comprising a mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14301299A JP4333931B2 (en) | 1998-09-02 | 1999-05-24 | Fuel cell power generator |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10-248029 | 1998-09-02 | ||
| JP24802998 | 1998-09-02 | ||
| JP14301299A JP4333931B2 (en) | 1998-09-02 | 1999-05-24 | Fuel cell power generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000149969A true JP2000149969A (en) | 2000-05-30 |
| JP4333931B2 JP4333931B2 (en) | 2009-09-16 |
Family
ID=26474843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14301299A Expired - Lifetime JP4333931B2 (en) | 1998-09-02 | 1999-05-24 | Fuel cell power generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4333931B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006156018A (en) * | 2004-11-26 | 2006-06-15 | Honda Motor Co Ltd | Device of cooling fuel cell |
-
1999
- 1999-05-24 JP JP14301299A patent/JP4333931B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006156018A (en) * | 2004-11-26 | 2006-06-15 | Honda Motor Co Ltd | Device of cooling fuel cell |
| JP4602056B2 (en) * | 2004-11-26 | 2010-12-22 | 本田技研工業株式会社 | Fuel cell cooling system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4333931B2 (en) | 2009-09-16 |
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