The influence of operating temperature on the efficiency of a combined heat and power fuel cell plant
It is generally accepted that the ideal operating temperature of a molten carbonate fuel cell (MCFC) is 650 °C. Nevertheless, when waste heat utilization in the form of an expander and steam production cycle is introduced in the system, another temperature level might prove more productive. This art...
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description | It is generally accepted that the ideal operating temperature of a molten carbonate fuel cell (MCFC) is 650
°C. Nevertheless, when waste heat utilization in the form of an expander and steam production cycle is introduced in the system, another temperature level might prove more productive. This article is a first attempt to the optimization of MCFC operating temperatures of a MCFC system by presenting a case study in which the efficiency of a combined heat and power (CHP) plant is analyzed. The fuel cell plant under investigation is designed around a 250
kW-class MCFC fuelled by natural gas, which is externally reformed by a heat exchange reformer (HER). The operating temperature of the MCFC is varied over a temperature range between 600 and 700
°C while keeping the rest of the system the same as far as possible. Changes in energetic efficiency are given and the causes of these changes are further analyzed. Furthermore, the exergetic efficiencies of the system and the distribution of exergy losses in the system are given. Flowsheet calculations show that there is little dependency on the temperature in the first order. Both the net electrical performance and the overall exergetic performance show a maximum at approximately 675
°C, with an electrical efficiency of 51.9% (LHV), and an exergy efficiency of 58.7%. The overall thermal efficiency of this CHP plant increases from 87.1% at 600
°C to 88.9% at 700
°C. Overall, the change in performance is small in this typical range of MCFC operating temperature. |
doi_str_mv | 10.1016/S0378-7753(03)00345-8 |
format | Article |
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°C. Nevertheless, when waste heat utilization in the form of an expander and steam production cycle is introduced in the system, another temperature level might prove more productive. This article is a first attempt to the optimization of MCFC operating temperatures of a MCFC system by presenting a case study in which the efficiency of a combined heat and power (CHP) plant is analyzed. The fuel cell plant under investigation is designed around a 250
kW-class MCFC fuelled by natural gas, which is externally reformed by a heat exchange reformer (HER). The operating temperature of the MCFC is varied over a temperature range between 600 and 700
°C while keeping the rest of the system the same as far as possible. Changes in energetic efficiency are given and the causes of these changes are further analyzed. Furthermore, the exergetic efficiencies of the system and the distribution of exergy losses in the system are given. Flowsheet calculations show that there is little dependency on the temperature in the first order. Both the net electrical performance and the overall exergetic performance show a maximum at approximately 675
°C, with an electrical efficiency of 51.9% (LHV), and an exergy efficiency of 58.7%. The overall thermal efficiency of this CHP plant increases from 87.1% at 600
°C to 88.9% at 700
°C. Overall, the change in performance is small in this typical range of MCFC operating temperature.</description><identifier>ISSN: 0378-7753</identifier><identifier>EISSN: 1873-2755</identifier><identifier>DOI: 10.1016/S0378-7753(03)00345-8</identifier><identifier>CODEN: JPSODZ</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Applied sciences ; case studies ; Cogeneration ; Combined power plants ; Design ; Energy ; Energy. Thermal use of fuels ; Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc ; Exact sciences and technology ; Flowsheet ; Fuel cell ; Fuel cells ; Fuel technology ; Heat exchange ; Installations for energy generation and conversion: thermal and electrical energy ; MCFC ; Modeling ; Natural gas ; Q1 ; Temperature ; waste heat</subject><ispartof>Journal of power sources, 2003-07, Vol.122 (1), p.37-46</ispartof><rights>2003 Elsevier Science B.V.</rights><rights>2003 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c471t-4f6d8a2b46ce38e87457992b6b9a46b48d0fb6667a4a51c2454379c7651da7bb3</citedby><cites>FETCH-LOGICAL-c471t-4f6d8a2b46ce38e87457992b6b9a46b48d0fb6667a4a51c2454379c7651da7bb3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/S0378-7753(03)00345-8$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,777,781,3537,27905,27906,45976</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=14941148$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Au, S.F.</creatorcontrib><creatorcontrib>McPhail, S.J.</creatorcontrib><creatorcontrib>Woudstra, N.</creatorcontrib><creatorcontrib>Hemmes, K.</creatorcontrib><title>The influence of operating temperature on the efficiency of a combined heat and power fuel cell plant</title><title>Journal of power sources</title><description>It is generally accepted that the ideal operating temperature of a molten carbonate fuel cell (MCFC) is 650
°C. Nevertheless, when waste heat utilization in the form of an expander and steam production cycle is introduced in the system, another temperature level might prove more productive. This article is a first attempt to the optimization of MCFC operating temperatures of a MCFC system by presenting a case study in which the efficiency of a combined heat and power (CHP) plant is analyzed. The fuel cell plant under investigation is designed around a 250
kW-class MCFC fuelled by natural gas, which is externally reformed by a heat exchange reformer (HER). The operating temperature of the MCFC is varied over a temperature range between 600 and 700
°C while keeping the rest of the system the same as far as possible. Changes in energetic efficiency are given and the causes of these changes are further analyzed. Furthermore, the exergetic efficiencies of the system and the distribution of exergy losses in the system are given. Flowsheet calculations show that there is little dependency on the temperature in the first order. Both the net electrical performance and the overall exergetic performance show a maximum at approximately 675
°C, with an electrical efficiency of 51.9% (LHV), and an exergy efficiency of 58.7%. The overall thermal efficiency of this CHP plant increases from 87.1% at 600
°C to 88.9% at 700
°C. Overall, the change in performance is small in this typical range of MCFC operating temperature.</description><subject>Applied sciences</subject><subject>case studies</subject><subject>Cogeneration</subject><subject>Combined power plants</subject><subject>Design</subject><subject>Energy</subject><subject>Energy. Thermal use of fuels</subject><subject>Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc</subject><subject>Exact sciences and technology</subject><subject>Flowsheet</subject><subject>Fuel cell</subject><subject>Fuel cells</subject><subject>Fuel technology</subject><subject>Heat exchange</subject><subject>Installations for energy generation and conversion: thermal and electrical energy</subject><subject>MCFC</subject><subject>Modeling</subject><subject>Natural gas</subject><subject>Q1</subject><subject>Temperature</subject><subject>waste heat</subject><issn>0378-7753</issn><issn>1873-2755</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><recordid>eNqF0U1r3DAQBmBRGug26U8o6JLSHpyMrE-fSgltEgjkkPQsZHmUKHhlR7JT8u9r74b2uCCQQM9oBr2EfGZwxoCp8zvg2lRaS_4V-DcALmRl3pENM5pXtZbyPdn8Ix_Ix1KeAIAxDRuC949IYwr9jMkjHQIdRsxuiumBTrjdnee8XCQ6LRJDiD4u9HWljvph28aEHX1EN1GXOjoOfzDTMGNPPfY9HXuXphNyFFxf8NPbfkx-__p5f3FV3dxeXl_8uKm80GyqRFCdcXUrlEdu0GghddPUrWobJ1QrTAehVUppJ5xkvhZScN14rSTrnG5bfky-7N8d8_A8Y5nsNpZ1DJdwmIutDdTMCDgIWSMNB5CHoVCKM8EWKPfQ56GUjMGOOW5dfrUM7BqT3cVk1wwsLGuNyZql7vStgSve9SG75GP5XywawZhY3fe9w-X_XiJmW3ZBYBcz-sl2QzzQ6S_yDqZG</recordid><startdate>20030715</startdate><enddate>20030715</enddate><creator>Au, S.F.</creator><creator>McPhail, S.J.</creator><creator>Woudstra, N.</creator><creator>Hemmes, K.</creator><general>Elsevier B.V</general><general>Elsevier Sequoia</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>C1K</scope><scope>SOI</scope><scope>7SP</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>L7M</scope></search><sort><creationdate>20030715</creationdate><title>The influence of operating temperature on the efficiency of a combined heat and power fuel cell plant</title><author>Au, S.F. ; McPhail, S.J. ; Woudstra, N. ; Hemmes, K.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c471t-4f6d8a2b46ce38e87457992b6b9a46b48d0fb6667a4a51c2454379c7651da7bb3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2003</creationdate><topic>Applied sciences</topic><topic>case studies</topic><topic>Cogeneration</topic><topic>Combined power plants</topic><topic>Design</topic><topic>Energy</topic><topic>Energy. Thermal use of fuels</topic><topic>Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc</topic><topic>Exact sciences and technology</topic><topic>Flowsheet</topic><topic>Fuel cell</topic><topic>Fuel cells</topic><topic>Fuel technology</topic><topic>Heat exchange</topic><topic>Installations for energy generation and conversion: thermal and electrical energy</topic><topic>MCFC</topic><topic>Modeling</topic><topic>Natural gas</topic><topic>Q1</topic><topic>Temperature</topic><topic>waste heat</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Au, S.F.</creatorcontrib><creatorcontrib>McPhail, S.J.</creatorcontrib><creatorcontrib>Woudstra, N.</creatorcontrib><creatorcontrib>Hemmes, K.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><collection>Electronics & Communications Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of power sources</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Au, S.F.</au><au>McPhail, S.J.</au><au>Woudstra, N.</au><au>Hemmes, K.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The influence of operating temperature on the efficiency of a combined heat and power fuel cell plant</atitle><jtitle>Journal of power sources</jtitle><date>2003-07-15</date><risdate>2003</risdate><volume>122</volume><issue>1</issue><spage>37</spage><epage>46</epage><pages>37-46</pages><issn>0378-7753</issn><eissn>1873-2755</eissn><coden>JPSODZ</coden><abstract>It is generally accepted that the ideal operating temperature of a molten carbonate fuel cell (MCFC) is 650
°C. Nevertheless, when waste heat utilization in the form of an expander and steam production cycle is introduced in the system, another temperature level might prove more productive. This article is a first attempt to the optimization of MCFC operating temperatures of a MCFC system by presenting a case study in which the efficiency of a combined heat and power (CHP) plant is analyzed. The fuel cell plant under investigation is designed around a 250
kW-class MCFC fuelled by natural gas, which is externally reformed by a heat exchange reformer (HER). The operating temperature of the MCFC is varied over a temperature range between 600 and 700
°C while keeping the rest of the system the same as far as possible. Changes in energetic efficiency are given and the causes of these changes are further analyzed. Furthermore, the exergetic efficiencies of the system and the distribution of exergy losses in the system are given. Flowsheet calculations show that there is little dependency on the temperature in the first order. Both the net electrical performance and the overall exergetic performance show a maximum at approximately 675
°C, with an electrical efficiency of 51.9% (LHV), and an exergy efficiency of 58.7%. The overall thermal efficiency of this CHP plant increases from 87.1% at 600
°C to 88.9% at 700
°C. Overall, the change in performance is small in this typical range of MCFC operating temperature.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/S0378-7753(03)00345-8</doi><tpages>10</tpages></addata></record> |
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subjects | Applied sciences case studies Cogeneration Combined power plants Design Energy Energy. Thermal use of fuels Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc Exact sciences and technology Flowsheet Fuel cell Fuel cells Fuel technology Heat exchange Installations for energy generation and conversion: thermal and electrical energy MCFC Modeling Natural gas Q1 Temperature waste heat |
title | The influence of operating temperature on the efficiency of a combined heat and power fuel cell plant |
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