JPH07169484A - Exhaust heat supply method for fuel cell power plant - Google Patents
Exhaust heat supply method for fuel cell power plantInfo
- Publication number
- JPH07169484A JPH07169484A JP5317186A JP31718693A JPH07169484A JP H07169484 A JPH07169484 A JP H07169484A JP 5317186 A JP5317186 A JP 5317186A JP 31718693 A JP31718693 A JP 31718693A JP H07169484 A JPH07169484 A JP H07169484A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust heat
- fuel cell
- power plant
- cell power
- 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
(57)【要約】
【目的】 本発明の目的は、既設の冷暖房機器のある施
設に、燃料電池の運転中及び停止中の双方において、蒸
気を安定して供給することが可能な燃料電池発電プラン
トの排熱供給方法を得ることである。
【構成】 本発明の燃料電池発電プラントの排熱供給方
法は、電池冷却水の昇温に使用する起動用のボイラーを
発電中に運転し、プラント外へ取り出す排熱利用用の蒸
気の過昇温に使用する。また、燃料電池の停止中に起動
用ボイラーを運転し、排熱利用用の蒸気を供給する。
(57) [Abstract] [Object] An object of the present invention is to provide a fuel cell power generation system capable of stably supplying steam to a facility having an existing cooling and heating equipment both while the fuel cell is operating and when it is stopped. To obtain the exhaust heat supply method of the plant. According to an exhaust heat supply method of a fuel cell power plant of the present invention, a start-up boiler used for raising the temperature of a cell cooling water is operated during power generation, and steam for exhaust heat use taken out of the plant is overheated. Used for warm. In addition, the boiler for start-up is operated while the fuel cell is stopped, and steam for using exhaust heat is supplied.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、燃料電池発電プラント
の排熱供給方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for supplying exhaust heat of a fuel cell power plant.
【０００２】[0002]
【従来の技術】燃料電池発電プラントは、自家用発電と
して電力源として利用されるほかに、需用地に近い点を
生かし、排熱を給湯、冷暖房、その他熱利用に使用され
ている。2. Description of the Related Art A fuel cell power plant is used not only as an electric power source for private power generation but also as a hot water supply, cooling and heating, and other heat utilization by taking advantage of the fact that it is close to the place of demand.
【０００３】燃料電池を使用した発電プラントは、小型
サイズでも高効率であること、燃料の多様化が計れるこ
と、排熱の有効利用が実施しやすいこと、特にオンサイ
ト型はビルの地下等需用地近くに設置できること、等い
くつかのすぐれた特徴を持っている。そのため、各分野
で積極的に導入が計画されており、実証プラントの設置
も盛んである。排気中のＮＯＸ，ＳＯＸ，ばいじん等も
他発電設備に比較して、極めて低い値であることも、将
来の発電装置として有望である。A power plant using a fuel cell is highly efficient even in a small size, can diversify fuels, and can effectively utilize exhaust heat. It has some excellent features such as being able to be installed near the site. Therefore, the introduction is planned actively in each field, and the installation of demonstration plants is also active. It is also promising as a future power generation device that NOX, SOX, dust and the like in the exhaust gas have extremely low values as compared with other power generation facilities.
【０００４】[0004]
【発明が解決しようとする課題】ところが、燃料電池プ
ラントでは、電池本体の運転温度が低いので、その排熱
の温度も低くなり、既設のボイラー生成蒸気と同一温度
とならず、既設の冷暖設備との混用が困難である。However, in the fuel cell plant, since the operating temperature of the cell body is low, the temperature of the exhaust heat is also low, and the temperature is not the same as that of the existing boiler-generated steam. It is difficult to mix with.
【０００５】そのため、排熱利用のために専用の冷暖房
機器を使用する必要があった。本発明の目的は、既設の
冷暖房機器のある施設に、燃料電池発電プラントを設置
し、その排熱を既設の冷暖房機器に混用することのでき
る燃料電池発電プラントの排熱供給方法を提供すること
にある。Therefore, it has been necessary to use a dedicated cooling and heating device for utilizing the exhaust heat. An object of the present invention is to provide a method for supplying exhaust heat of a fuel cell power plant in which a fuel cell power plant is installed in a facility having an existing air conditioner, and its exhaust heat can be mixed with the existing air conditioner. It is in.
【０００６】[0006]
【課題を解決するための手段】本発明の燃料電池発電プ
ラントの排熱供給方法は、電池冷却水の昇温に使用する
起動用のボイラーを発電中に運転し、プラント外へ取り
出す排熱利用用の蒸気の過昇温に使用する。また、燃料
電池の停止中に起動用ボイラーを運転し、排熱利用用の
蒸気を供給する。A method for supplying exhaust heat of a fuel cell power plant according to the present invention uses an exhaust heat which is used for operating a start-up boiler used for raising the temperature of cell cooling water during power generation and is taken out of the plant. It is used to overheat the steam for use. In addition, the boiler for start-up is operated while the fuel cell is stopped, and steam for using exhaust heat is supplied.
【０００７】[0007]
【作用】これにより、燃料電池の運転中及び停止中の双
方において、蒸気を安定して供給することが可能とな
る。With this, it becomes possible to stably supply the vapor both while the fuel cell is operating and when it is stopped.
【０００８】[0008]
【実施例】以下、この発明の実施例を図１に示し説明す
る。発電装置１に収納された電池本体２は、発電運転中
発熱するため、適正な運転温度にするため、循環ポンプ
３により循環する電池冷却水により温度制御されてい
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. The battery main body 2 housed in the power generation device 1 generates heat during the power generation operation, so that the temperature is controlled by the battery cooling water circulated by the circulation pump 3 in order to attain an appropriate operating temperature.
【０００９】電池冷却水の温度制御を行なう熱交換器４
の二次側は、別ループの二次電池冷却水ラインとなり、
昇圧ポンプ５により昇圧及び循環が行なわれる。昇圧さ
れた二次電池冷却水は、ボイラ６によりさらにスーパー
ヒートされスチームセパレータ７より外部へ排熱蒸気の
形で取り出される。全体的にこの二次電池冷却水ライン
の圧は、圧力調整器８により制御される。A heat exchanger 4 for controlling the temperature of the battery cooling water
The secondary side of is a secondary battery cooling water line of another loop,
The boost pump 5 boosts pressure and circulates. The pressurized secondary battery cooling water is further superheated by the boiler 6 and taken out from the steam separator 7 to the outside in the form of exhaust heat steam. Overall, the pressure of the secondary battery cooling water line is controlled by the pressure regulator 8.
【００１０】すなわち、本発明では、既設の蒸気ヘッダ
へ注入するために必要な圧力、温度まで、この燃料電池
発電プラントの排熱蒸気の温度等を上昇させるため、起
動時しか使用しない起動用ボイラーを使用する。That is, according to the present invention, since the temperature and the like of the exhaust heat steam of the fuel cell power plant are raised to the pressure and temperature necessary for injecting into the existing steam header, the start-up boiler used only at start-up. To use.
【００１１】燃料電池の動作温度より電池冷却水は、や
く170 〜180 ゜の温度で循環されているが、この熱を取
出すため熱交換器を設置すると、温度レベルとして５〜
10゜の低下がある。これをポンプで昇圧し、さらに起動
用ボイラを使用してスーパーヒートさせ、既設の蒸気ヘ
ッダ180 〜190 ゜に注入可能なレベルまで昇圧する。Due to the operating temperature of the fuel cell, the cell cooling water is circulated at a temperature of 170 to 180 °, but if a heat exchanger is installed to take out this heat, the temperature level will be 5 to 5.
There is a decline of 10 °. This is boosted by a pump and then superheated by using a start-up boiler to boost the pressure to a level that allows injection into the existing steam header 180-190 °.
【００１２】このように、従来の技術では、電池冷却水
の温度が取り出せる排熱の最高温度であり、熱交換器等
の何らかの伝熱手段を使用すれば必ず温度低下を生じて
いた。従って、既設の冷暖房機器と燃料電池発電プラン
ト排熱の混用は困難であった。As described above, in the prior art, the temperature of the battery cooling water is the maximum temperature of the exhaust heat that can be taken out, and the temperature is always lowered if any heat transfer means such as a heat exchanger is used. Therefore, it was difficult to mix the existing cooling and heating equipment with the exhaust heat of the fuel cell power plant.
【００１３】この発明により、既設ボイラと同一の圧力
・温度の蒸気が得られることになり、既設の設備との混
用が可能となった。二次電池冷却水より取り出す排熱の
量は、燃料電池発電プラントの出力が増減しても、ボイ
ラ６の出力を調節することにより、排熱量を一定にする
ことが可能であるが、その極端な実施例が、プラント停
止中の排熱取出しである。これにより、電気出力と熱出
力は全く別個に量を調節することが可能となった。According to the present invention, steam having the same pressure and temperature as those of the existing boiler can be obtained, and the steam can be mixed with the existing equipment. The amount of exhaust heat extracted from the secondary battery cooling water can be kept constant by adjusting the output of the boiler 6 even if the output of the fuel cell power plant increases or decreases. Another example is the exhaust heat extraction during plant shutdown. This allowed the electrical output and the thermal output to be adjusted independently of each other.
【００１４】[0014]
【発明の効果】以上述べたように、従来、燃料電池プラ
ントの排熱レベルが低いため、排熱の利用は、給湯、暖
房あるいは効率の低い温水タイプの吸収冷凍機の使用等
に制限されていたが、この発明により、既設のボイラ蒸
気と同等の扱いが可能となり、応用の範囲が広がった。As described above, since the exhaust heat level of the fuel cell plant is low, the use of the exhaust heat is limited to hot water supply, heating, or use of a low-efficiency hot water absorption refrigerator. However, according to the present invention, it is possible to handle the boiler steam in the same manner as the existing boiler steam, and the range of application is expanded.
【図１】本発明の実施例の説明図FIG. 1 is an explanatory diagram of an embodiment of the present invention.
１…発電装置 ２…電池本体 ３…循環ポンプ ４…熱交換器 ５…昇圧ポンプ ６…ボイラ ７…スチームセパレータ ８…圧力調節器 DESCRIPTION OF SYMBOLS 1 ... Power generator 2 ... Battery main body 3 ... Circulation pump 4 ... Heat exchanger 5 ... Booster pump 6 ... Boiler 7 ... Steam separator 8 ... Pressure regulator
Claims (2)
おいて、電池冷却水の昇温に使用する起動用のボイラー
を発電中に運転し、プラント外へ取り出す排熱利用用の
蒸気の過昇温に使用すること特徴とする燃料電池発電プ
ラントの排熱供給方法。1. In a method for supplying exhaust heat of a fuel cell power plant, a start-up boiler used to raise the temperature of cell cooling water is operated during power generation, and excessive temperature rise of steam for exhaust heat utilization taken out of the plant. A method for supplying exhaust heat from a fuel cell power plant, characterized by being used for.
おいて、燃料電池の停止中に起動用ボイラーを運転し、
排熱利用用の蒸気を供給することを特徴とする燃料電池
発電プラントの排熱供給方法。2. A method for supplying exhaust heat of a fuel cell power plant, wherein a starting boiler is operated while the fuel cell is stopped,
A method for supplying exhaust heat from a fuel cell power plant, comprising supplying steam for using exhaust heat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5317186A JPH07169484A (en) | 1993-12-17 | 1993-12-17 | Exhaust heat supply method for fuel cell power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5317186A JPH07169484A (en) | 1993-12-17 | 1993-12-17 | Exhaust heat supply method for fuel cell power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07169484A true JPH07169484A (en) | 1995-07-04 |
Family
ID=18085417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5317186A Pending JPH07169484A (en) | 1993-12-17 | 1993-12-17 | Exhaust heat supply method for fuel cell power plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07169484A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000041261A3 (en) * | 1999-01-05 | 2001-10-25 | Siemens Ag | Liquid-cooled fuel cell battery comprising an integrated heat exchanger |
-
1993
- 1993-12-17 JP JP5317186A patent/JPH07169484A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000041261A3 (en) * | 1999-01-05 | 2001-10-25 | Siemens Ag | Liquid-cooled fuel cell battery comprising an integrated heat exchanger |
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