JPH06243883A - Cooling device for fuel cell - Google Patents
Cooling device for fuel cellInfo
- Publication number
- JPH06243883A JPH06243883A JP50A JP2878993A JPH06243883A JP H06243883 A JPH06243883 A JP H06243883A JP 50 A JP50 A JP 50A JP 2878993 A JP2878993 A JP 2878993A JP H06243883 A JPH06243883 A JP H06243883A
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- cooling
- water
- steam separator
- steam
- 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.)
- Pending
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]
【産業上の利用分野】本発明は燃料電池の冷却装置に関
する。FIELD OF THE INVENTION The present invention relates to a cooling device for a fuel cell.
【0002】[0002]
【従来の技術】燃料電池本体には発電のための多数のセ
ルとそのセルで発生する熱を排出するための冷却板が積
層され、その冷却板に冷却水を外部から供給、排出する
ための循環用ポンプと配管および改質用の蒸気を取り出
すための気水分離器からなる冷却ループを有する。ま
た、この冷却ループには、冷却水の質を維持するための
ブローダウン用の取り出し口が設けられている。このよ
うな装置を運転すると、改質用蒸気の取り出しやブロー
ダウンによって冷却ループ中の冷却水の量が減少する。
そのため、ループ内の循環用ポンプと気水分離器との間
に冷却水補給用のポンプと配管を図7に示すように設
け、気水分離器中の冷却水の液面の位置を感知して冷却
水補給用のポンプを作動させて補給冷却水を送り込んで
いる。2. Description of the Related Art A large number of cells for power generation and a cooling plate for discharging heat generated in the cells are laminated on a fuel cell main body, and cooling water is externally supplied to and discharged from the cooling plate. It has a cooling loop consisting of a circulation pump and piping, and a steam separator for taking out steam for reforming. Further, this cooling loop is provided with a blow-down outlet for maintaining the quality of the cooling water. When such a device is operated, the amount of cooling water in the cooling loop decreases due to the removal of the reforming steam and blowdown.
Therefore, a cooling water supply pump and piping are provided between the circulation pump and the steam separator in the loop as shown in FIG. 7 to detect the position of the liquid surface of the cooling water in the steam separator. The pump for replenishing cooling water is operated to feed the replenishing cooling water.
【0003】[0003]
【発明が解決しようとする課題】この従来の冷却システ
ムでは、循環用ポンプのNPSH(押込水頭)を得るた
めに予熱されていない補給冷却水を循環用ポンプの入口
前に間欠的に供給する構成になっている。そのため、補
給の有無により冷却板に入る冷却水の温度が変動して電
池内部に熱サイクル疲労を生じ、電池材料の劣化や電解
質の移動などが引き起こされ電池の性能低下や破壊を招
く。In this conventional cooling system, the makeup cooling water that has not been preheated to obtain the NPSH (pushing head) of the circulation pump is intermittently supplied before the inlet of the circulation pump. It has become. Therefore, the temperature of the cooling water entering the cooling plate fluctuates depending on the presence or absence of replenishment, causing thermal cycle fatigue inside the battery, causing deterioration of the battery material, movement of the electrolyte, and the like, which leads to deterioration and performance of the battery.
【0004】そこで本発明は、冷却板に入る冷却水温度
の変動による電池の性能低下や破壊を生じること無く冷
却ループに冷却水を補給できる冷却装置を提供すること
を目的とする。Therefore, an object of the present invention is to provide a cooling device which can replenish cooling water to a cooling loop without causing performance deterioration or destruction of the battery due to fluctuation of cooling water temperature entering a cooling plate.
【0005】[0005]
【課題を解決するための手段】本発明は上記の目的を達
成すめために、外部から冷却ループへの冷却水の補給を
連続的に行うか、熱容量の大きい気水分離器に補給する
ことを特徴とするものである。In order to achieve the above-mentioned object, the present invention aims to continuously supply the cooling water from the outside to the cooling loop or to supply it to a steam separator having a large heat capacity. It is a feature.
【0006】[0006]
【作用】上記手段によって、電池本体に供給される冷却
水の温度変動が小さくなり、電池の性能低下や破壊を招
くことを防止出来る。By the above means, it is possible to prevent the temperature fluctuation of the cooling water supplied to the battery body from becoming small, and to prevent the deterioration of the performance of the battery and the destruction thereof.
【0007】[0007]
(実施例1)以下本発明の実施例を図面を参照して説明
する。(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.
【0008】図1において、電池本体5には発電のため
の多数のセルとそのセルで発生する熱を排出するための
冷却板が積層され、その冷却板に冷却水を循環供給する
循環ポンプ3、冷却水の質を維持するためのブローダウ
ン用取り出し配管及び弁8、および改質器用の蒸気を取
り出すための気水分離器4からなる冷却ループが形成さ
れている。また、この冷却ループには、外部から冷却水
を補給する補給用ポンプ1から三方弁2を介して気水分
離器4及び循環用ポンプ3の入口に至る冷却水補給用配
管がそれぞれ設けられている。気水分離器4には、その
中の冷却水の水位を検出する水位計7が設置されてい
る。水位計7の信号は、信号線10を介して制御装置9に
送られ演算され開度指令として、信号線11を介して、ブ
ローダウン配管の流量制御弁8の開度を制御する構成と
なっている。In FIG. 1, a battery main body 5 has a large number of cells for power generation and a cooling plate for discharging heat generated in the cells stacked, and a circulation pump 3 for circulating and supplying cooling water to the cooling plates. A cooling loop is formed of a blowdown take-out pipe and valve 8 for maintaining the quality of the cooling water, and a steam separator 4 for taking out steam for the reformer. Further, in this cooling loop, cooling water replenishment pipes from the replenishment pump 1 for replenishing the cooling water from the outside to the inlets of the steam separator 4 and the circulation pump 3 via the three-way valve 2 are respectively provided. There is. The steam separator 4 is provided with a water level gauge 7 for detecting the water level of the cooling water therein. The signal of the water level gauge 7 is sent to the control device 9 via the signal line 10 and is calculated as an opening degree command to control the opening degree of the flow control valve 8 of the blowdown pipe via the signal line 11. ing.
【0009】通常、補給冷却水は補給用ポンプ1により
三方弁2を介して気水分離器4に供給される。このよう
にすると、補給冷却水を循環用ポンプ3の入口に供給す
る場合に比べ、気水分離器4の大量の冷却水と混合され
ることにより、循環用ポンプ3を通して電池本体5に供
給される冷却水の温度変動が図2に示す様に小さくて済
む。Normally, the makeup cooling water is supplied to the steam separator 4 by the makeup pump 1 via the three-way valve 2. By doing so, compared with the case of supplying the supplemental cooling water to the inlet of the circulation pump 3, it is supplied to the battery main body 5 through the circulation pump 3 by being mixed with a large amount of cooling water of the steam separator 4. The temperature fluctuation of the cooling water is small as shown in FIG.
【0010】前記の如く、電池本体の送られる冷却水の
温度変動を小さく維持することにより、電池本体内の電
解質の体積変動を小さく押さえることが出来、電解質の
溢流が防止され、図3に示す様に電池の性能低下を軽減
することが出来る。また、電池の負荷変動によって、循
環用ポンプ3のNPSH(押込水頭)が不足する場合に
は、予め三方弁2の弁開度を設定して直接循環用ポンプ
3の入口に供給することにより必要なNPSHを得るこ
とも可能となる。 (実施例2)As described above, by keeping the temperature fluctuation of the cooling water sent to the battery main body small, it is possible to suppress the volume fluctuation of the electrolyte in the battery main body and prevent the overflow of the electrolyte. As shown, the deterioration of the battery performance can be reduced. Further, when the NPSH (push head) of the circulation pump 3 is insufficient due to the load fluctuation of the battery, it is necessary to set the valve opening degree of the three-way valve 2 in advance and directly supply it to the inlet of the circulation pump 3. It is also possible to obtain a high NPSH. (Example 2)
【0011】図4において、補給用ポンプ1は流量制御
弁12を介して気水分離器4に直接連結されている。その
他の構成要素について図1と同じ機能を有する要素につ
いては同じ番号を付した。この構成の場合は、流量制御
弁12はON/OFF弁でも同様の効果を期待できるのは
いうまでもない。In FIG. 4, the replenishment pump 1 is directly connected to the steam separator 4 via a flow control valve 12. With respect to the other constituent elements, the elements having the same functions as those in FIG. In the case of this configuration, it goes without saying that the same effect can be expected even if the flow control valve 12 is an ON / OFF valve.
【0012】制御装置9により、気水分離器4の水位計
7の信号を受け、流量制御弁12により、気水分離器4に
直接冷却水が補給され、気水分離器4の水位が一定の範
囲に維持される。補給される冷却水は、熱容量の大きい
気水分離器4内で混合されてから電池本体5に供給され
るため、冷却水の温度変化は小さく押さえられる。この
ように、冷却水の温度変化は小さく押さえられ、図3に
示す様に電池の性能低下を軽減させることが出来る。 (実施例3)The controller 9 receives a signal from the water level gauge 7 of the steam / water separator 4, and the flow control valve 12 directly supplies cooling water to the steam / water separator 4 to keep the water level of the steam / water separator 4 constant. Maintained in the range of. Since the supplied cooling water is mixed in the steam separator 4 having a large heat capacity and then supplied to the battery main body 5, the temperature change of the cooling water is suppressed to a small level. In this way, the temperature change of the cooling water can be suppressed to a small level, and the deterioration of the battery performance can be reduced as shown in FIG. (Example 3)
【0013】図5において、補給冷却水が三方弁2を介
して気水分離器4に直接供給されてるが、三方弁2と気
水分離器4を連結する配管に熱交換器6が設置されてい
る。その他の構成要素について図1と同じ機能を有する
要素については同じ番号を付した。この場合、ブローダ
ウン流量制御弁はON/OFF弁でもよい。In FIG. 5, makeup cooling water is directly supplied to the steam separator 4 via the three-way valve 2, but the heat exchanger 6 is installed in the pipe connecting the three-way valve 2 and the steam separator 4. ing. With respect to the other constituent elements, the elements having the same functions as those in FIG. In this case, the blowdown flow control valve may be an ON / OFF valve.
【0014】制御装置9は、気水分離器4の水位計7の
信号を信号線10を介して受け、信号線11を介して流量制
御弁8を制御して、気水分離器4に直接補給される冷却
水の流量を制御し、気水分離器4の水位が一定の範囲に
維持される。The controller 9 receives the signal from the water level gauge 7 of the steam / water separator 4 via the signal line 10 and controls the flow control valve 8 via the signal line 11 to directly connect to the steam / water separator 4. The flow rate of the replenished cooling water is controlled, and the water level of the steam separator 4 is maintained within a certain range.
【0015】補給される冷却水は、冷却ループの温度に
あるブローダウン水により熱交換器を介して加熱されて
から、熱容量の大きい気水分離器4内で混合され、電池
本体5に供給されるため、冷却水の温度変化は、実施例
1よりさらに小さく押さえられる。 (実施例4)The supplied cooling water is heated by the blowdown water at the temperature of the cooling loop through the heat exchanger, and then mixed in the steam separator 4 having a large heat capacity and supplied to the battery body 5. Therefore, the temperature change of the cooling water can be suppressed to be smaller than that in the first embodiment. (Example 4)
【0016】図6において、補給冷却水が三方弁2を介
して気水分離器4に直接供給され、かつ三方弁2と循環
ポンプ3は熱交換器6を介して連結されている。その他
の構成要素については、図5と同じ機能を有する要素に
ついては同じ番号を付した。In FIG. 6, make-up cooling water is directly supplied to the steam separator 4 via the three-way valve 2, and the three-way valve 2 and the circulation pump 3 are connected via the heat exchanger 6. Regarding other components, the same numbers are given to the components having the same functions as in FIG.
【0017】制御装置9は、気水分離器4の水位計7の
信号を信号線10を介して受け、信号線11を介して流量制
御弁8を制御して、気水分離器4の水位が一定の範囲に
維持される。また気水分離器4に直接補給される冷却水
は、熱容量の大きい気水分離器4内で混合されてから電
池本体5に供給される。The controller 9 receives the signal from the water level gauge 7 of the steam / water separator 4 via the signal line 10 and controls the flow control valve 8 via the signal line 11 to control the water level of the steam / water separator 4. Is maintained within a certain range. The cooling water supplied directly to the steam separator 4 is mixed in the steam separator 4 having a large heat capacity and then supplied to the battery body 5.
【0018】一方、循環ポンプ3に直接供給される冷却
水は、冷却ループの温度にあるブローダウン水により熱
交換器を介して加熱されてから、循環ポンプ3を介して
電池本体5に供給されるため、冷却水の温度変化は小さ
く押さえられる。On the other hand, the cooling water directly supplied to the circulation pump 3 is heated by the blowdown water at the temperature of the cooling loop via the heat exchanger and then supplied to the battery main body 5 via the circulation pump 3. Therefore, the temperature change of the cooling water can be suppressed small.
【0019】[0019]
【発明の効果】このように本発明によれば、冷却板、循
環用ポンプおよび気水分離器からなる冷却ループにおい
て、この冷却ループへの外部からの冷却水補給を気水分
離器に対して行うようにしたので、冷却板に入る冷却水
の温度変動を小さくし、電池の性能低下や破壊を招くこ
と無く冷却ループに冷却水を補給できる。As described above, according to the present invention, in the cooling loop including the cooling plate, the circulation pump and the steam separator, the cooling water is supplied to the steam separator from the outside. Since this is done, the temperature fluctuation of the cooling water entering the cooling plate can be reduced, and the cooling water can be replenished to the cooling loop without degrading the performance of the battery or destroying it.
【図1】本発明による主たる実施例を示す構成図。FIG. 1 is a configuration diagram showing a main embodiment according to the present invention.
【図2】従来と本発明による冷却板に入る冷却水の温度
変動を示すグラフ。FIG. 2 is a graph showing temperature fluctuations of cooling water entering a cooling plate according to the related art and the present invention.
【図3】従来と本発明による電池の性能低下の状況を示
す図。FIG. 3 is a diagram showing a state of performance deterioration of a battery according to the related art and the present invention.
【図4】他の実施例を示す図。FIG. 4 is a diagram showing another embodiment.
【図5】他の実施例を示す図。FIG. 5 is a diagram showing another embodiment.
【図6】他の実施例を示す図。FIG. 6 is a diagram showing another embodiment.
【図7】従来の例を示す構成図。FIG. 7 is a configuration diagram showing a conventional example.
1…冷却水補給用ポンプ、2…三方弁、3…冷却水循環
用ポンプ、4…気水分離器、5…電池本体、6…熱交換
器、7…水位計、8…流量制御弁、9…制御装置。1 ... Cooling water supply pump, 2 ... Three-way valve, 3 ... Cooling water circulation pump, 4 ... Steam separator, 5 ... Battery body, 6 ... Heat exchanger, 7 ... Water level gauge, 8 ... Flow control valve, 9 …Control device.
Claims (5)
循環用ポンプと配管および気水分離器を備えた冷却ルー
プを有し、外部から前記冷却ループへの冷却水の補給を
連続的に行う補給装置を設けたことを特徴とする燃料電
池の冷却装置。1. A cooling loop having a circulation pump for supplying cooling water to a fuel cell main body, a pipe and a steam separator, and continuously supplying cooling water from the outside to the cooling loop. A cooling device for a fuel cell, which is provided with a replenishing device.
よりブローダウン水量を制御し、常に気水分離器の水位
が一定の範囲内に維持することを特徴とする請求項1記
載の燃料電池の冷却装置。2. The fuel according to claim 1, wherein the blowdown water amount is controlled by the water level signal of the steam-water separator in the cooling loop, and the water level of the steam-water separator is always maintained within a certain range. Battery cooling device.
を特徴とする請求項1記載の燃料電池の冷却装置。3. The cooling device for a fuel cell according to claim 1, wherein the cooling water is directly supplied to the steam separator.
器の水位により補給用ポンプを間欠的に作動させること
を特徴とする請求項3記載の燃料電池の冷却装置。4. The cooling device for a fuel cell according to claim 3, wherein the supply pump is intermittently operated by the water level of the steam separator when the steam separator is directly supplied.
て、冷却水補給配管に熱交換器を設置し、補給冷却水を
予熱することを特徴とする請求項1または3記載の燃料
電池の冷却装置。5. The cooling device for the fuel cell according to claim 1, wherein a blow-down from the cooling loop is used to install a heat exchanger in the cooling water supply pipe to preheat the supplied cooling water. .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP50A JPH06243883A (en) | 1993-02-18 | 1993-02-18 | Cooling device for fuel cell |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP50A JPH06243883A (en) | 1993-02-18 | 1993-02-18 | Cooling device for fuel cell |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH06243883A true JPH06243883A (en) | 1994-09-02 |
Family
ID=12258198
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50A Pending JPH06243883A (en) | 1993-02-18 | 1993-02-18 | Cooling device for fuel cell |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH06243883A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100488726B1 (en) * | 2002-12-13 | 2005-05-11 | 현대자동차주식회사 | Hydrogen supply system for a fuel-cell system |
JP2011034975A (en) * | 2010-10-12 | 2011-02-17 | Panasonic Corp | Fuel cell power generating system |
-
1993
- 1993-02-18 JP JP50A patent/JPH06243883A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100488726B1 (en) * | 2002-12-13 | 2005-05-11 | 현대자동차주식회사 | Hydrogen supply system for a fuel-cell system |
JP2011034975A (en) * | 2010-10-12 | 2011-02-17 | Panasonic Corp | Fuel cell power generating system |
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