Michael K. Williams, Kenneth Tignor, Luke Sigler, C. Rajagopal, V. Gurau
We present an innovative, inexpensive end-effector, the robot workcell, and the fuel cell components used to demonstrate the automated assembly process of a proton exchange membrane fuel cell stack. The end-effector is capable of handling a variety of fuel cell components including membrane electrode assemblies, bipolar plates and gaskets using vacuum cups mounted on level compensators and connected to a miniature vacuum pump. The end-effector and the fuel cell components are designed with features that allow an accurate component alignment during the assembly process within a tolerance of 0.02 in. and avoiding component overlapping which represents a major cause of overboard gas leaks during the fuel cell operation. The accurate component alignment in the stack is achieved with electrically nonconductive alignment pins permanently mounted on one fuel cell endplate and positioning holes machined on the fuel cell components and on the end-effector. The alignment pins feature a conical tip which eases the engagement between them and the positioning holes. A passive compliance system consisting of two perpendicularly mounted miniature linear blocks and rails allow compensating for the robot's limitations in accuracy and repeatability.
{"title":"Robotic Arm for Automated Assembly of Proton Exchange Membrane Fuel Cell Stacks","authors":"Michael K. Williams, Kenneth Tignor, Luke Sigler, C. Rajagopal, V. Gurau","doi":"10.1115/1.4027392","DOIUrl":"https://doi.org/10.1115/1.4027392","url":null,"abstract":"We present an innovative, inexpensive end-effector, the robot workcell, and the fuel cell components used to demonstrate the automated assembly process of a proton exchange membrane fuel cell stack. The end-effector is capable of handling a variety of fuel cell components including membrane electrode assemblies, bipolar plates and gaskets using vacuum cups mounted on level compensators and connected to a miniature vacuum pump. The end-effector and the fuel cell components are designed with features that allow an accurate component alignment during the assembly process within a tolerance of 0.02 in. and avoiding component overlapping which represents a major cause of overboard gas leaks during the fuel cell operation. The accurate component alignment in the stack is achieved with electrically nonconductive alignment pins permanently mounted on one fuel cell endplate and positioning holes machined on the fuel cell components and on the end-effector. The alignment pins feature a conical tip which eases the engagement between them and the positioning holes. A passive compliance system consisting of two perpendicularly mounted miniature linear blocks and rails allow compensating for the robot's limitations in accuracy and repeatability.","PeriodicalId":15829,"journal":{"name":"Journal of Fuel Cell Science and Technology","volume":"11 1","pages":"054501"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4027392","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63484765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-01Epub Date: 2014-06-10DOI: 10.1115/1.4027709
Kalyan Chatterjee, Ravi Shankar, Amit Kumar
This paper describes a mathematical model of a solid oxide fuel cell (SOFC) power plant integrated in a multimachine power system. The utilization factor of a fuel stack maintains steady state by tuning the fuel valve in the fuel processor at a rate proportional to a current drawn from the fuel stack. A suitable fuzzy logic control is used for the overall system, its objective being controlling the current drawn by the power conditioning unit and meet a desirable output power demand. The proposed control scheme is verified through computer simulations.
{"title":"Fuzzy Logic Based Controller for a Grid-Connected Solid Oxide Fuel Cell Power Plant.","authors":"Kalyan Chatterjee, Ravi Shankar, Amit Kumar","doi":"10.1115/1.4027709","DOIUrl":"https://doi.org/10.1115/1.4027709","url":null,"abstract":"<p><p>This paper describes a mathematical model of a solid oxide fuel cell (SOFC) power plant integrated in a multimachine power system. The utilization factor of a fuel stack maintains steady state by tuning the fuel valve in the fuel processor at a rate proportional to a current drawn from the fuel stack. A suitable fuzzy logic control is used for the overall system, its objective being controlling the current drawn by the power conditioning unit and meet a desirable output power demand. The proposed control scheme is verified through computer simulations.</p>","PeriodicalId":15829,"journal":{"name":"Journal of Fuel Cell Science and Technology","volume":"11 5","pages":"0510051-510059"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4027709","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32529397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Nanofiber Cathode Catalyst Layer Model for a Proton Exchange Membrane Fuel Cell","authors":"Dennis O. Dever, R. Cairncross, Y. Elabd","doi":"10.1115/1.4026985","DOIUrl":"https://doi.org/10.1115/1.4026985","url":null,"abstract":"","PeriodicalId":15829,"journal":{"name":"Journal of Fuel Cell Science and Technology","volume":"11 1","pages":"041007"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4026985","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63484239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Thermal, electrical, and electrocatalytical properties of the oxygen deficient La0.5Sr0.2TiO2.95 perovskite are studied in relation to their possible use as solid oxide fuel cell (SOFC) anode material. La0.5Sr0.2TiO2.95 is chemically stable under air and reduced atmosphere. Its thermal expansion coefficient is close to that of yttrium-stabilized zirconia (YSZ) under air and Ar/H2 (5%). No significant chemical expansion or contraction of La0.5Sr0.2TiO2.95 are observed between air and reduced atmosphere. La0.5Sr0.2TiO2.95 material has an electrical conductivity at 800 °C of 1 S cm−1 under moist hydrogen (H2/H2O (3%)), reaching 10 S cm−1 when LSTO is prereduced under Ar/H2(5%). The polarization resistance of La0.5Sr0.2TiO2.95 at 800 °C under moist hydrogen is about 1.5 Ω cm2, a value which has been obtained when including a thin CGO buffer layer between the dense YSZ electrolyte and the porous electrode.
研究了贫氧La0.5Sr0.2TiO2.95钙钛矿作为固体氧化物燃料电池(SOFC)负极材料的热、电、电催化性能。La0.5Sr0.2TiO2.95在空气和还原性气氛下化学稳定。在空气和5% Ar/H2条件下，其热膨胀系数接近钇稳定氧化锆(YSZ)。La0.5Sr0.2TiO2.95在空气和还原大气之间没有明显的化学膨胀或收缩。La0.5Sr0.2TiO2.95材料在800℃湿氢(H2/H2O(3%))条件下的电导率为1 S cm−1，在Ar/H2(5%)条件下进行LSTO预还原时的电导率可达10 S cm−1。La0.5Sr0.2TiO2.95在800℃湿氢条件下的极化电阻约为1.5 Ω cm2，该值是在致密的YSZ电解质和多孔电极之间加入薄CGO缓冲层时得到的。
{"title":"La0.5Sr0.2TiO3-δ Perovskite as Anode Material for Solid Oxide Fuel Cells","authors":"S. Roudeau, J. Grenier, J. Bassat","doi":"10.1115/1.4026933","DOIUrl":"https://doi.org/10.1115/1.4026933","url":null,"abstract":"Thermal, electrical, and electrocatalytical properties of the oxygen deficient La0.5Sr0.2TiO2.95 perovskite are studied in relation to their possible use as solid oxide fuel cell (SOFC) anode material. La0.5Sr0.2TiO2.95 is chemically stable under air and reduced atmosphere. Its thermal expansion coefficient is close to that of yttrium-stabilized zirconia (YSZ) under air and Ar/H2 (5%). No significant chemical expansion or contraction of La0.5Sr0.2TiO2.95 are observed between air and reduced atmosphere. La0.5Sr0.2TiO2.95 material has an electrical conductivity at 800 °C of 1 S cm−1 under moist hydrogen (H2/H2O (3%)), reaching 10 S cm−1 when LSTO is prereduced under Ar/H2(5%). The polarization resistance of La0.5Sr0.2TiO2.95 at 800 °C under moist hydrogen is about 1.5 Ω cm2, a value which has been obtained when including a thin CGO buffer layer between the dense YSZ electrolyte and the porous electrode.","PeriodicalId":15829,"journal":{"name":"Journal of Fuel Cell Science and Technology","volume":"11 1","pages":"041006"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4026933","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63483801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of Humidity on Carbon Monoxide Desorption Kinetics","authors":"F. Dundar, A. Pitois, A. Pilenga, G. Tsotridis","doi":"10.1115/1.4027185","DOIUrl":"https://doi.org/10.1115/1.4027185","url":null,"abstract":"","PeriodicalId":15829,"journal":{"name":"Journal of Fuel Cell Science and Technology","volume":"57 73 1","pages":"041008"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4027185","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63484632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of Compressive Pressure on the Contact Behavior Between Bipolar Plate and Gas Diffusion Layer in a Proton Exchange Membrane Fuel Cell","authors":"Guo Li, Jinzhu Tan, J. Gong","doi":"10.1115/1.4027253","DOIUrl":"https://doi.org/10.1115/1.4027253","url":null,"abstract":"","PeriodicalId":15829,"journal":{"name":"Journal of Fuel Cell Science and Technology","volume":"11 1","pages":"041009"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4027253","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63484870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Guo Li, Jinzhu Tan, J. Gong, Xiaowei Zhang, Yanchao Xin, Xuejia Hu
Proton exchange membrane (PEM) fuel cell is regarded as one of the potential renewable energy which may provide a possible long-term solution to reduce carbon dioxide emissions, reduce fossil fuel dependency and increase energy efficiency. Even though great progress has been made, long-term stability and durability is still an issue. The contamination ion plays an important role on the electrical performance of PEM fuel cell. This paper investigates the effect of Mg2+ contamination on PEM fuel cell performance as a function of Mg2+ concentration. Two levels of Mg2+ concentration was chose. From the experimental results, it can be obtained that a significant drop in fuel cell performance occurred when Mg2+ was injected into the anode fuel stream. The voltage and power density of fuel cell decreased larger and larger with increase of Mg2+ concentration over time. The Mg2+ mainly caused the concentration polarization loss from the anode catalyst to the membrane in fuel cell.
{"title":"Performance of Proton Exchange Membrane in the Presence of Mg2","authors":"Guo Li, Jinzhu Tan, J. Gong, Xiaowei Zhang, Yanchao Xin, Xuejia Hu","doi":"10.1115/1.4027391","DOIUrl":"https://doi.org/10.1115/1.4027391","url":null,"abstract":"Proton exchange membrane (PEM) fuel cell is regarded as one of the potential renewable energy which may provide a possible long-term solution to reduce carbon dioxide emissions, reduce fossil fuel dependency and increase energy efficiency. Even though great progress has been made, long-term stability and durability is still an issue. The contamination ion plays an important role on the electrical performance of PEM fuel cell. This paper investigates the effect of Mg2+ contamination on PEM fuel cell performance as a function of Mg2+ concentration. Two levels of Mg2+ concentration was chose. From the experimental results, it can be obtained that a significant drop in fuel cell performance occurred when Mg2+ was injected into the anode fuel stream. The voltage and power density of fuel cell decreased larger and larger with increase of Mg2+ concentration over time. The Mg2+ mainly caused the concentration polarization loss from the anode catalyst to the membrane in fuel cell.","PeriodicalId":15829,"journal":{"name":"Journal of Fuel Cell Science and Technology","volume":"11 1","pages":"044501"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4027391","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63484724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of Nonionic, Anionic, and Cationic Surfactants on the Sol Gel Synthesis of IrO-Ce0.8Sm0.2O2-δ Nanocomposite for Solid Oxide Fuel Cell Application","authors":"Njoku. B. Chima, N. Patrick","doi":"10.1115/1.4027366","DOIUrl":"https://doi.org/10.1115/1.4027366","url":null,"abstract":"","PeriodicalId":15829,"journal":{"name":"Journal of Fuel Cell Science and Technology","volume":"11 1","pages":"041010"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4027366","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63485084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Bipolar Plates for PEMFCs","authors":"C. Sequeira, L. Amaral","doi":"10.1115/1.4027254","DOIUrl":"https://doi.org/10.1115/1.4027254","url":null,"abstract":"","PeriodicalId":15829,"journal":{"name":"Journal of Fuel Cell Science and Technology","volume":"11 1","pages":"044001"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4027254","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63484910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Air-Side Heat Transfer Performance of Louver Fin and Multitube Heat Exchanger for Direct Methanol Fuel Cell Cooling Application","authors":"H. Kang, Hye-jung Cho, Jin Ho Kim, A. Jacobi","doi":"10.1115/1.4026955","DOIUrl":"https://doi.org/10.1115/1.4026955","url":null,"abstract":"","PeriodicalId":15829,"journal":{"name":"Journal of Fuel Cell Science and Technology","volume":"11 1","pages":"041004"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4026955","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63484593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：