CN102044685A - Gas heating method for fuel cell system - Google Patents
Gas heating method for fuel cell system Download PDFInfo
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- CN102044685A CN102044685A CN200910197049XA CN200910197049A CN102044685A CN 102044685 A CN102044685 A CN 102044685A CN 200910197049X A CN200910197049X A CN 200910197049XA CN 200910197049 A CN200910197049 A CN 200910197049A CN 102044685 A CN102044685 A CN 102044685A
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- gas
- fuel cell
- heat
- electric heating
- cell system
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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
- 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
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Abstract
The invention relates to a gas heating method for a fuel cell system, which is characterized in that, according to different gas flow in the fuel cell system, two modes that heat-transfer metallic packing is filled between an electrical heating pipe and a heating container or a spiral fin is welded or rolled on the outer surface of the electrical heating pipe and the like are respectively adopted to reduce a gap between the electrical heating pipe and the heating container as much as possible so that the heat-transfer flowing distance of gas in the process from an inlet to an outlet is increased, the gas retention period is prolonged or the heat-transfer area of the electrical heating pipe is increased and the gas heat-transfer efficiency is improved so that a fuel cell power generation system or a test system improves the heat-transfer efficiency under different gas flow working conditions so as to ensure that the gas meets the set temperature demand.
Description
Technical field
The present invention relates to the fuel cell technology field, particularly a kind of gas heated method that is used for fuel cell system.
Background technology
Air that Proton Exchange Membrane Fuel Cells electricity generation system (comprising fuel battery test system) relates to and hydrogen heating are not especially carried out in the fuel cell system of humidification at some, and their gas flow is little of several milliliters of per minutes, arrives several cubic metres of per minutes greatly.Temperature for improving these gases generally adopts electrically heated way to regulate and control.Under the very little situation of tolerance, although electrical power meets the demands, the surface area of electric heating tube has certain limitation, causes the gas that flows through to have little time heating.Under the very big situation of tolerance, because the flow velocity height of gas, the time of staying is short, the phenomenon that exists gas to have little time to heat equally.Above-mentioned phenomenon causes gas heating slow, even can't realize the working condition of fuel cell system requirement.
Analyzing its main cause that produces this phenomenon is: little airflow is wall attachment effect, and gas flow often is in viscous flow state even short circuit, is difficult to effective contact; Air flow shoot through, gas and electric heating tube surface situations such as effectively time of contact is short, heat-transfer effect is relatively poor.
The invention provides a kind of gas heated method that is used for fuel cell system (comprising fuel battery test system), by dwindling the gap between electric heating tube and the heating container, increase heat transfer area (metallic stuffing and fin), prolong gas residence time, improve gas heat-transfer efficient, solve the low problem of fuel cell system gas electrical heating efficiency, can satisfy the gas temperature requirement of fuel cell system under gas with various flow working condition.
Summary of the invention
The object of the present invention is to provide a kind of gas heated method that is used for fuel cell system (comprising fuel battery test system).It is characterized in that increasing heat transfer area (metallic stuffing and fin), prolong gas residence time, improve gas heat-transfer efficient by dwindling the gap between electric heating tube and the heating container.
Purpose of the present invention is achieved through the following technical solutions: gas flow is less in fuel cell system, during for several milliliters of per minutes, dwindle the space of electric heating tube and heating container, and between the space of electric heating tube and heating container, fill the heat-transfer metal gauze packing, forced draft enters into the process that outlet is discharged from import, makes gas be in turbulence state, staggered flowing in the filler crack, prolong the time of staying of gas in heating container, improve the electric heating tube heat transfer efficiency with this.Gas flow is bigger in fuel cell system, when reaching several cubic metres of per minutes, at electric heating tube outer surface weldering system or rolling spirality fin, electric heating tube is put into heating container again together with fin, make fin external diameter and heating container internal diameter keep as far as possible little gap, forced draft is helical flow in circulating line, increases the contact area of gas, prolong gas residence time, to improve the heat transfer efficiency of gas and electric heating tube.
Above-mentioned dual mode has all reached increase electric heating tube heat transfer area, increase the mobile distance of gas heat-transfer, prolong the purpose of gas by the electric heating tube time of staying, thereby improved gas heated efficient largely, guaranteed the requirement under gas with various flow operating mode of fuel cell generation or test macro gas temperature.
Description of drawings
Describe the present invention in detail below in conjunction with accompanying drawing:
Fig. 1 is the mode of heating schematic diagram of gas provided by the invention when low flow rate condition.
The mode of heating schematic diagram that Fig. 2 is a gas provided by the invention when big flow operating mode.
Embodiment
As shown in Figure 1, under gas low flow rate condition condition, by dwindling the space between electric heating tube (1) and the heating container (2), and between its space, fill heat-transfer metal gauze packing (3), make gas enter into the process that gas vent (2) is discharged from gas feed (5), forced draft is staggered flowing in the filler crack, prolongs the time of staying of gas in heating container (2), improves heat transfer efficiency between gas and the electrothermal tube with this.
As shown in Figure 2, under the big flow working condition of gas, by reducing the method for cross-sectional area between electric heating tube (1) and the heating container (2), promptly at electric heating tube (1) outer surface weldering system or rolling spirality fin (3), electric heating tube (1) is put into heating container (2) again together with fin (3), make fin (3) external diameter and heating container (4) internal diameter keep as far as possible little gap, make gas enter into the process that gas vent (2) is discharged from gas feed (5), forced draft is helical flow in circulating line, make gas be in turbulence state, increased the electrothermal tube heat transfer area, to improve the heat transfer efficiency of gas and electrothermal tube.
Claims (3)
1. gas heated method that is used for fuel cell system (comprising fuel battery test system), the difference that it is characterized in that gas flow size in the fuel cell system, adopt respectively between electric heating tube and heating container and to fill the heat-transfer metal filler or at dual modes such as electrothermal tube outer surface weldering system or rolling spirality fins, dwindle the gap between electric heating tube and the heating container, improve the gas electrical heating efficiency.
2. gas heated method according to claim 1, it is characterized in that when fuel cell system is in the small-flow gas working condition, between the space between electric heating tube and the heating container, fill the heat-transfer metal gauze packing, dwindle the space between electric heating tube and the heating container.
3. gas heated method according to claim 1, it is characterized in that when fuel cell system is in big flow gas working condition, at electric heating tube outer surface weldering system or rolling spirality fin, electric heating tube is put into heating container again together with fin, or increase the electric heating tube heat transfer area, and make fin external diameter and heating container internal diameter keep as far as possible little gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910197049XA CN102044685A (en) | 2009-10-13 | 2009-10-13 | Gas heating method for fuel cell system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910197049XA CN102044685A (en) | 2009-10-13 | 2009-10-13 | Gas heating method for fuel cell system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102044685A true CN102044685A (en) | 2011-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910197049XA Pending CN102044685A (en) | 2009-10-13 | 2009-10-13 | Gas heating method for fuel cell system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102044685A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106925185A (en) * | 2015-12-31 | 2017-07-07 | 中核四○四有限公司 | A kind of fluorine gas preheating device |
| CN112619724A (en) * | 2019-09-24 | 2021-04-09 | 内蒙古伊泰煤基新材料研究院有限公司 | Heating/vaporizing device for filling metal particles |
-
2009
- 2009-10-13 CN CN200910197049XA patent/CN102044685A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106925185A (en) * | 2015-12-31 | 2017-07-07 | 中核四○四有限公司 | A kind of fluorine gas preheating device |
| CN112619724A (en) * | 2019-09-24 | 2021-04-09 | 内蒙古伊泰煤基新材料研究院有限公司 | Heating/vaporizing device for filling metal particles |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110504 |