JPH01166467A - Fuel cell power generation system - Google Patents
Fuel cell power generation systemInfo
- Publication number
- JPH01166467A JPH01166467A JP62326007A JP32600787A JPH01166467A JP H01166467 A JPH01166467 A JP H01166467A JP 62326007 A JP62326007 A JP 62326007A JP 32600787 A JP32600787 A JP 32600787A JP H01166467 A JPH01166467 A JP H01166467A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- heat exchanger
- fuel cell
- exhaust
- heat
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
-
- 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
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は燃料電池発電システムの、排ガス中から熱を
回収する排熱回収方式に関するものであるＯ
第２図は例えは、日本産業機械工業会発行昭和５９年５
月「オンサイト型燃料電池の技術調査報告書」第１ｌ−
１３ａページに示され声従来の燃料電池発電システムを
示す図である。図において、（１）は燃料極（ｌａ）、
空気極（１ｂ）から成る燃料電池１（２）は燃料供給装
置（３）よ）供給される炭化水素系燃料を改質して上記
燃料電池（１）の燃料極（１＆）に水素を多く含む改質
ガスを供給する改質装置で、この改質装置は改質反応部
（ハ）とバーナ部（２ｂ）よシ構成される。DETAILED DESCRIPTION OF THE INVENTION This invention relates to an exhaust heat recovery method for recovering heat from exhaust gas in a fuel cell power generation system.
"Technical Survey Report on On-site Fuel Cells" Volume 1-
FIG. 13a is a diagram showing a conventional fuel cell power generation system. In the figure, (1) is the fuel electrode (la),
The fuel cell 1 (2) consisting of the air electrode (1b) reforms the hydrocarbon fuel supplied by the fuel supply device (3) to increase the amount of hydrogen to the fuel electrode (1&) of the fuel cell (1). This reformer is composed of a reforming reaction section (c) and a burner section (2b).
（４）は燃料電池（１）の空気極（１ｂ）及び改質装置
（２）のバーナ部（２’ｂ）に空気を供給する空気供給
装置、（５）は燃料電池（１）の空気極（ｌｂ）を出た
排空気、及び改質装置（２）のバーナ部（Ｔｂ）を＃Ｉ
！ＩｆＣ燃焼排ガスを合流させて大気へ放出させる排ガ
ス回路、（６）は発電システムの排熱を利用する目的で
排ガス回路（５）上に設置される排熱回収用熱交換器、
（７）は排熱を外部に取シ出すための冷却水回路で、排
熱回収用熱交換器（６）の冷却水管につながれている。(4) is an air supply device that supplies air to the air electrode (1b) of the fuel cell (1) and the burner section (2'b) of the reformer (2), and (5) is the air supply device that supplies air to the air electrode (1b) of the fuel cell (1). The exhaust air exiting the pole (lb) and the burner part (Tb) of the reformer (2) are
! an exhaust gas circuit that combines IfC combustion exhaust gas and releases it into the atmosphere; (6) is a heat exchanger for exhaust heat recovery installed on the exhaust gas circuit (5) for the purpose of utilizing the exhaust heat of the power generation system;
(7) is a cooling water circuit for extracting exhaust heat to the outside, and is connected to the cooling water pipe of the exhaust heat recovery heat exchanger (6).
（８）は排熱回収用熱交換器（６）で凝縮した排ガス中
のドレンを導くドレンタンクである＠
次に動作について説明する。燃料供給袋＠ （３）よ〕
供給された炭化水素系燃料は、改質装置（２）の改質反
応部（２ａ）にお−てバーナ部（２ｂ）よ〕熱を与えら
れて水素を多く含むガスに改質されたあと、燃料電池（
１）の燃料極（ｌ＆）に供給される。一方、空気供給装
置（４）よシ供給された空気の大部分は燃料電池（１）
の空気極（ｌｂ）へ送られ、燃料極（１＆）の水素と反
応して直流電力を発生させる。燃料極（ｌ＆）を出た余
剰燃料は、改質装置（２）のバーナ部（ａｂ）Ｋ送られ
、ここで空気供給装置（４）から供給された空気によシ
燃焼され改質反応に必要な熱が与えられる。(8) is a drain tank that guides the drain in the exhaust gas condensed in the exhaust heat recovery heat exchanger (6).@ Next, the operation will be explained. Fuel supply bag @ (3)]
The supplied hydrocarbon fuel is heated by the burner section (2b) in the reforming reaction section (2a) of the reformer (2) and reformed into a gas containing a large amount of hydrogen. ,Fuel cell(
1) is supplied to the fuel electrode (l&). On the other hand, most of the air supplied by the air supply device (4) goes to the fuel cell (1).
It is sent to the air electrode (lb) of the fuel electrode (1&) and reacts with hydrogen at the fuel electrode (1&) to generate DC power. The surplus fuel leaving the fuel electrode (l&) is sent to the burner section (ab) K of the reformer (2), where it is combusted by the air supplied from the air supply device (4) and undergoes a reforming reaction. Provides the necessary heat.
改質装置（２）のバーナ部（ｇｂ）を出た燃焼排ガス及
び燃料電池（１）の空気極（ｌｂ）を出た排空気は合流
して排ガス回路（５）に導かれたあと、大気に放出され
るが、この排ガス回路（５）中の排ガスは例えば１４０
〜１５０℃の高温ガスであシ、そのまま系外に排出した
のでは熱エネルギーを無駄に外部に捨てることになる０
このため、この様な燃料電池発電システムにお−ては、
排ガス回路（５）に排熱回収用熱交換器（６）を設置し
、排ガス中の熱エネルギーを回収してシステムの熱効率
を高めることが一般に行われている。ここで、排熱回収
用熱交換器（６）での排熱回収量は排熱回収用熱交換器
（６）の出口排ガス温度に関連し、この温度を下げるほ
ど、排熱回収量が増えるので、通常この温度は１５０〜
６０℃まで下げられ、その後排ガスはシステム排ガスと
して、県外に放出される。また排熱回収用熱交換器（６
）によシ、併せて排ガス中よシ凝縮水を系内に回収する
ことができるが排熱口°収用熱交換器（６）の出口排ガ
ス温度を！５０〜６０℃Ｋｔで下げることがこの目的に
も適合する。この様にして排ガス回路（５）上に排熱回
収用熱交換器（６）が配置されここで冷却水回路（ｎか
ら導かれた冷却水との熱交換によ）、排ガス温度が５０
〜６０℃程度に下げられ、これに伴い排ガス中の水分の
一部が凝縮して凝縮水がドレンタンク（８）に導かれる
とともに排ガスはそのまま系外に放出される＠排熱回収
用熱交換器（６）で熱を与えられた冷却水は系外へ導か
れ排熱利用に供される◎〔発明が解決しようとする問題
点〕
従来の燃料電池発電システムは以上のように構成されて
−るので、５０〜６０℃の低い温度の排ガスをその１１
；ｔ％外へ排出しなければならず、排ガス中の相対湿度
が高いため系外への排出口付近で白煙が発生しやすいと
−う問題点があった。また排出ガスの温度が低いと排ガ
スが拡散しにくくな）、地上におけるＭｏｘ濃度も高く
なるなどの問題点もあった。The combustion exhaust gas exiting the burner section (gb) of the reformer (2) and the exhaust air exiting the air electrode (lb) of the fuel cell (1) are combined and led to the exhaust gas circuit (5), then released into the atmosphere. However, the exhaust gas in this exhaust gas circuit (5) is e.g.
It is a high-temperature gas of ~150℃, and if it is directly discharged from the system, thermal energy will be wasted.
Therefore, in such a fuel cell power generation system,
It is common practice to install an exhaust heat recovery heat exchanger (6) in the exhaust gas circuit (5) to recover thermal energy in the exhaust gas and improve the thermal efficiency of the system. Here, the amount of waste heat recovered by the heat exchanger for waste heat recovery (6) is related to the outlet exhaust gas temperature of the heat exchanger for waste heat recovery (6), and the lower this temperature is, the more the amount of waste heat recovered increases. Therefore, this temperature is usually 150~
The temperature is lowered to 60°C, and the exhaust gas is then released outside the prefecture as system exhaust gas. In addition, a heat exchanger for exhaust heat recovery (6
) In addition, the condensed water in the exhaust gas can be recovered into the system, but the exhaust gas temperature at the outlet of the heat exchanger (6) can be reduced at the exhaust heat outlet! Lowering the temperature by 50-60°C Kt is also suitable for this purpose. In this way, the heat exchanger (6) for exhaust heat recovery is arranged on the exhaust gas circuit (5), and the exhaust gas temperature is 50.
The temperature is lowered to approximately 60°C, and as a result, some of the water in the exhaust gas condenses, and the condensed water is led to the drain tank (8), and the exhaust gas is released outside the system as it is @ heat exchanger for exhaust heat recovery The cooling water heated in the vessel (6) is guided outside the system and used for waste heat utilization. [Problem to be solved by the invention] The conventional fuel cell power generation system is configured as described above. - Therefore, the exhaust gas at a low temperature of 50 to 60℃ is
There was a problem in that white smoke was likely to be generated near the outlet to the outside of the system because the relative humidity in the exhaust gas was high. In addition, there were other problems such as the low temperature of the exhaust gas makes it difficult for the exhaust gas to diffuse) and the concentration of Mox on the ground increases.
この発明は上記のような問題点を解消するためになされ
たもので排ガスの相対湿度を下げることによル、白煙を
防止しできる燃料電池発電システムを得ることを目的と
する０
〔問題点を解決するための手段〕
この発明に係る燃料電池発電システムは排ガス回路上に
お−て排熱回収用熱交換器の上流側と下流側で互≠に熱
交換を行わせる再生熱交換器を設置したものである０
〔作用〕
この発明における燃料電池発電システムでは排ガス回路
上に再生熱交換器を設置し、排熱回収用熱交換器の上流
側と下流側で互−に熱交換を行わせることにより従来方
式に比べ温度が高く、相対湿度の低い排ガスを排出させ
ることができ、これに＃い、白煙が防止される。This invention was made to solve the above-mentioned problems, and aims to provide a fuel cell power generation system that can prevent white smoke by lowering the relative humidity of exhaust gas. Means for Solving the Problem] The fuel cell power generation system according to the present invention includes a regenerative heat exchanger that mutually exchanges heat on the upstream and downstream sides of the exhaust heat recovery heat exchanger on the exhaust gas circuit. [Operation] In the fuel cell power generation system of the present invention, a regenerative heat exchanger is installed on the exhaust gas circuit, and heat exchange is performed between the upstream and downstream sides of the exhaust heat recovery heat exchanger. By doing so, it is possible to discharge exhaust gas with a higher temperature and lower relative humidity than in the conventional system, which also prevents white smoke.
以下、この発明の一実施例を図について説明する。第１
図にお−て、（ａ ｓ （ｌａ） ｅ （１ｂＭ’）
ｅ （ｚａ）ｔ（ｇｂ） 、 （ａ）〜（８）は＠ｇ図
に示した従来の構成と同じものである＠（９）は排ガス
回路（５）上に設置し、排熱回収用熱交換器（６）の上
流側と下流側で互いに熱交換を行わせる再生熱交換器で
ある０
次に動作について説明する口燃料供給装置（３）よシ供
給された炭化水素系燃料は改質装置（２）の改質反応部
（ハ）にお−てバーナ部（２１＋）よシ熱を与えられて
水素を多く含むガスに改質されたあと、燃料電池（１）
の燃料極（ｌ＆）に供給される。一方、空気供給装置（
４）よシ供給された空気の大部分は燃料電池（１）の空
気極（１ｂ）へ送られ、燃料極（１りの水素と反応して
、直流電力を発生させる。燃料極（１，）を出た余剰燃
料は改質装置（２）のバーナ部（２ｂ）に送られ、ここ
で空気供給装置（４）から供給された空気によシ燃焼さ
れ改質反応に必要な熱が与えられる◎改質装置（２）の
バーナ部（２１１）を出た燃焼排ガス及び燃料電池（１
）の空気極（１１）をｔＢた排空気は合流して排ガス回
路（５） Ｋ導かれたあと大気に放出されるが、この合
流直後の排ガス回路（５）中の排ガスは例えは１４０〜
１５０℃の高温ガスである。この排ガスは、再生熱交換
器（９）で例えは１２０℃程度の温度に下げられた後、
排熱回収用熱交換器（６）で冷却水回路（７）から導か
れた冷却水との熱交換によル、温度を５０〜６０℃Ｋま
て下げられる・熱交換後の冷却水は系外に導かれ排熱利
用される＠ここで、排ガス中の水分の一部は凝縮し、凝
縮水がドシンタンク（８）に導かれるとともに排ガスは
再び再生熱交換器（９）Ｋ送られる。ここでこの排ガス
は上流の合流直後の高温の排ガスとの熱交換によ〕温度
が高められ湿度を下げたあとシステム排ガスとして大気
に放出される。An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, (a s (la) e (1bM')
e (za) t (gb), (a) to (8) are the same as the conventional configuration shown in Figure @g. @ (9) is installed on the exhaust gas circuit (5) and is used for exhaust heat recovery. This is a regenerative heat exchanger that exchanges heat between the upstream and downstream sides of the heat exchanger (6).Next, the operation of the hydrocarbon fuel supplied by the fuel supply device (3) is explained. In the reforming reaction section (c) of the fuel cell (2), the gas is heated by the burner section (21+) and reformed into a gas containing a large amount of hydrogen.
is supplied to the fuel electrode (l&). On the other hand, the air supply device (
4) Most of the supplied air is sent to the air electrode (1b) of the fuel cell (1) and reacts with hydrogen from the fuel electrode (1) to generate DC power. ) is sent to the burner section (2b) of the reformer (2), where it is burned by the air supplied from the air supply device (4) to provide the heat necessary for the reforming reaction. ◎The combustion exhaust gas exiting the burner section (211) of the reformer (2) and the fuel cell (1
) The exhaust air that passes through the air electrode (11) of tB joins and is led to the exhaust gas circuit (5) before being released into the atmosphere.
It is a high temperature gas of 150°C. After this exhaust gas is lowered to a temperature of about 120°C in a regenerative heat exchanger (9),
By heat exchange with the cooling water led from the cooling water circuit (7) in the exhaust heat recovery heat exchanger (6), the temperature can be lowered by 50 to 60℃K. After the heat exchange, the cooling water The exhaust gas is led out of the system and used as waste heat. At this point, a part of the moisture in the exhaust gas is condensed, and the condensed water is led to the dosing tank (8), and the exhaust gas is again sent to the regenerative heat exchanger (9)K. Here, the temperature of this exhaust gas is increased by heat exchange with the high-temperature exhaust gas immediately after the upstream merging, and the humidity is lowered before being released into the atmosphere as system exhaust gas.
例えば合流直後で１６０℃の排ガスをまず再生熱交換器
（９）で１２！０℃にして排熱回収用熱交換器（６）で
５０℃に下げた場合、大気に放出されるシステム排ガス
温度は約９０℃、相対湿度は１７．６ ％程度となる０
この温度、ｉ度の排ガスであれは、そのまま大気に排出
しても白煙、地上ＮＯｘ濃度の点で何ら問題を生じない
。For example, if exhaust gas at 160°C immediately after merging is first changed to 12!0°C in the regenerative heat exchanger (9) and then lowered to 50°C in the exhaust heat recovery heat exchanger (6), the system exhaust gas temperature released to the atmosphere The temperature is approximately 90℃, and the relative humidity is approximately 17.6%.
If the exhaust gas is at this temperature, i degrees, it will not cause any problems in terms of white smoke or ground NOx concentration even if it is directly discharged into the atmosphere.
以上のようにこの発明によれば、排ガス回路上において
再生熱交換器を、排熱回収用熱交換器の □上流側と下
流側で互いに熱交換するように設置したので、温度が高
く、相対湿度の低い排ガスを排出させることができ、排
出口付近での白煙を防止できる。またそれに伴い排ガス
の拡散が促進され地上におけるＮｏｘ濃度を低くできる
という効果がある。As described above, according to the present invention, the regenerative heat exchanger is installed on the exhaust gas circuit so as to exchange heat with each other on the upstream and downstream sides of the exhaust heat recovery heat exchanger. It allows exhaust gas with low humidity to be discharged and prevents white smoke from forming near the exhaust port. Further, the diffusion of exhaust gas is promoted and the NOx concentration on the ground can be lowered.
第１図はこの発明の一実施例による燃料電池発電システ
ムを示す系統図、第２図は従来の燃料電池発電システム
を示す系統図である。
図において、（１）は燃料電池、（１ｍ）は燃料極５（
ｌｂ）は空気極、（２）は改質装置、（４）は空気供給
装置、（６）は排ガス回路、（６）は排熱回収用熱交換
器−（９）は再生熱交換器である◎
なお、図中、同一符号は同一、又は相当部分を示すＯFIG. 1 is a system diagram showing a fuel cell power generation system according to an embodiment of the present invention, and FIG. 2 is a system diagram showing a conventional fuel cell power generation system. In the figure, (1) is the fuel cell, (1m) is the fuel electrode 5 (
lb) is the air electrode, (2) is the reformer, (4) is the air supply device, (6) is the exhaust gas circuit, (6) is the exhaust heat recovery heat exchanger, and (9) is the regenerative heat exchanger. Yes ◎ In the figures, the same symbols indicate the same or equivalent parts.
Claims (1)
水素を多く含むガスを供給する改質装置と、前記燃料電
池に空気を供給する空気供給装置とを備え、前記改質装
置からの燃焼排ガスと前記燃料電池の空気極からの排空
気の混合ガスを系外に排出する排ガス回路上に排熱回収
用熱交換器を備えた燃料電池発電システムにおいて、前
記排熱回収用熱交換器の上流側と下流側で互いに熱交換
を行わせる再生熱交換器を設置したことを特徴とする燃
料電池発電システム。A fuel cell, a reformer that reforms hydrocarbon fuel and supplies hydrogen-rich gas to the fuel cell, and an air supply device that supplies air to the fuel cell; In a fuel cell power generation system comprising an exhaust heat recovery heat exchanger on an exhaust gas circuit that discharges a mixed gas of combustion exhaust gas and exhaust air from the air electrode of the fuel cell to the outside of the system, the exhaust heat recovery heat exchanger A fuel cell power generation system characterized by installing a regenerative heat exchanger that exchanges heat with each other on the upstream and downstream sides of the vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62326007A JPH0628166B2 (en) | 1987-12-23 | 1987-12-23 | Fuel cell power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62326007A JPH0628166B2 (en) | 1987-12-23 | 1987-12-23 | Fuel cell power generation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01166467A true JPH01166467A (en) | 1989-06-30 |
| JPH0628166B2 JPH0628166B2 (en) | 1994-04-13 |
Family
ID=18183052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62326007A Expired - Lifetime JPH0628166B2 (en) | 1987-12-23 | 1987-12-23 | Fuel cell power generation system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0628166B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04108A (en) * | 1990-03-14 | 1992-01-06 | Mitsubishi Heavy Ind Ltd | Combustion device |
| WO2024170068A1 (en) * | 2023-02-14 | 2024-08-22 | Volvo Truck Corporation | Handling an exhaust flow of a fuel cell system of a vehicle |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4651245A1 (en) * | 2024-05-16 | 2025-11-19 | Volvo Truck Corporation | Fuel cell exhaust management |
-
1987
- 1987-12-23 JP JP62326007A patent/JPH0628166B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04108A (en) * | 1990-03-14 | 1992-01-06 | Mitsubishi Heavy Ind Ltd | Combustion device |
| WO2024170068A1 (en) * | 2023-02-14 | 2024-08-22 | Volvo Truck Corporation | Handling an exhaust flow of a fuel cell system of a vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0628166B2 (en) | 1994-04-13 |
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