<!DOCTYPE html> <html> <head><title>Microturbine Search Engine Series | Capstone Turbine Publications | Performance Evaluation of Gas Turbine-Fuel Cell Hybrid Micro Generation System | 001</title></head><body> <meta name= "description"content=" Information Publications | Publications Search Engine | On Demand PDF Document Searches "/> <meta name="keywords"content="capstone turbine, microturbine, Capstone C30,Capstone C65,Capstone C200,Capstone C600,Capstone C800,Capstone C1000"/><a href="http://www.globalmicroturbine.com"><img src="logo.jpg"alt="Global Microturbine - Global Energy LLC "></a></p> <BR> Publication Title | Performance Evaluation of Gas Turbine-Fuel Cell Hybrid Micro Generation System <BR><p><b>Microturbine Search Engine Series </b></p><p>Capstone Turbine Publications search was updated real-time via Filemaker on:</p> <script type="text/javascript">tmonth=new Array("January","February","March","April","May","June","July","August","September","October","November","December"); function GetClock(){ d = new Date(); nday = d.getDay(); nmonth = d.getMonth(); ndate = d.getDate(); nyear = d.getYear(); if(nyear<1000) nyear=nyear+1900; document.getElementById('clockbox').innerHTML=""+tmonth[nmonth]+" "+ndate+", "+nyear+""; setTimeout("GetClock()", 1000); } window.onload=GetClock; </script> <div id="clockbox"></div></p><a href='../index.htm'> Capstone Turbine Publications | Return to Search List </a><BR><BR><p>Search Completed | Title | Performance Evaluation of Gas Turbine-Fuel Cell Hybrid Micro Generation System <BR> Original File Name Searched: 30111.pdf | <a href="https://www.google.com/search?q=30111.pdf">Google It</a></a> | <a href="https://www.yahoo.com/search?q=30111.pdf">Yahoo</a></a> | <a href="https://www.bing.com/search?q=30111.pdf">Bing</a></a> </p><p><br /></p><BR> Page Number: 001<BR><a href="evaluation-combined-heat-and-power-technologies-wastewater-facilities-244.htm">Previous Page View</a> | <a href="performance-evaluation-gas-turbine-fuel-cell-hybrid-micro-generation-system--002.htm">Next Page View</a><BR><TABLE border='1' style=width='1200'><TR><TD valign='top'> <p>Text | Performance Evaluation of Gas Turbine-Fuel Cell Hybrid Micro Generation System | 001</p><BR><BR><span style="" >ABSTRACT<br/><br/>Design-point and part-load characteristics of a gas turbine- solid oxide fuel cell hybrid micro generation system, of which total power output is 30 kW, are investigated for its prospective use in the small distributed energy systems. A cycle analysis of the hybrid system has been performed to obtain general strate- gies of highly efficient operation and control. The method of analy- sis has been compared with previous results, of which power out- put values are set in the range from 287 to 519 kW. Then, the part-load performance of the 30 kW system has been evaluated. Two typical operation modes, i.e., constant and variable rotation speed gas turbine operation are considered. It is found that the variable speed mode is more advantageous to avoid performance degradation under part-load conditions. Operating under this mode, despite of 10 % adiabatic efficiency drop in the gas turbine components, the generation efficiency can be maintained over 60 % (LHV) in the power output range from 50 to 100 %.<br/><br/>Subscripts<br/><br/>cell : SOFC cell<br/><br/>shf : shifting<br/><br/>ca : cathode<br/><br/>net : net value<br/><br/>r : recuperator<br/><br/>t : turbine<br/><br/>gcfc : gas compressor (SOFC) blow : blower<br/><br/>SOFC : solid oxide fuel cell in : inlet<br/><br/>DP : design point<br/><br/>1. INTRODUCTION<br/><br/>ref : reforming or reference an : anode<br/><br/>el : electrode<br/><br/>act : activation polarization c : compressor<br/><br/>DA : inverter<br/><br/>gcgt : gas compressor (&mu;GT) gen : generator<br/><br/>gt : gas turbine<br/><br/>out : outlet<br/><br/>NOMENCLATURE<br/><br/>C : heat-capacity ratio<br/><br/>F : Faraday constant<br/><br/>H : enthalpy flow<br/><br/>K : equilibrium constant<br/><br/>Q : heat flow W T : temperature K<br/><br/>V : voltage V m : mass flow rate kg/s p : pressure atm x : mole fraction<br/><br/>&eta; : efficiency<br/><br/>NTU: number of heat transfer unit<br/><br/>Small distributed generation systems are expected to achieve highly effective energy utilization. Currently, micro gas turbines (&mu;GT) [1] under 100 kW are rapidly spreading in the power gen- eration market. In addition, a concept of much smaller &mu;GT, of which power output is 5 kW, was suggested [2]. Micro gas tur- bines have a perspective to achieve much higher efficiency as 40 % by introducing a higher turbine inlet temperature (TIT) and higher recuperator effectiveness [3]. However, achievement of much higher efficiency than 40 % with traditional &mu;GT is cru- cially difficult, while a &mu;GT combined with a solid oxide fuel cell (SOFC) is expected to attain extremely higher efficiency. It has been indicated that &mu;GT-SOFC hybrid systems offer efficiency over 70 % [4], and it is reported that trial operation of a hybrid system, of which power output is 220 kW, was launched [5, 6]. This study was initiated to establish a strategy to develop much smaller systems to meet increasing energy demands in commer-<br/><br/>Copyright (C) 2002 by ASME<br/><br/>1 Copyright &copy; 2002 by ASME<br/><br/>G : Gibbs energy<br/><br/>J : current density N : rotation speed<br/><br/>R : gas constant<br/><br/>U : utilization factor W : power<br/><br/>n : mole number<br/><br/>u : tip speed<br/><br/>&delta; : thickness<br/><br/>&rho; : resistivity<br/><br/>J/kg<br/><br/>A/ m2 1/s J/mol K<br/><br/>W mol m/s m &Omega; m<br/><br/>C/mol W<br/><br/>Shinji Kimijima and Nobuhide Kasagi<br/><br/>The University of Tokyo<br/><br/>Department of Mechanical Engineering Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8656, Japan<br/><br/>1<br/><br/>Proceedings of ASME Turbo Expo 2002<br/><br/>June 3-6, 2002, Amsterdam, The Netherlands<br/><br/>ASME TURBO EXPO 2002 June 3-6, 2002, Amsterdam, The Netherlands<br/><br/>GT-2002-30111<br/><br/>PERFORMANCE EVALUATION OF GAS TURBINE-FUEL CELL HYBRID MICRO GENERATION SYSTEM<br/><br/>Proceedings of<br/><br/></span></TD><TD valign='top'><p>Image | Performance Evaluation of Gas Turbine-Fuel Cell Hybrid Micro Generation System </p><BR><BR><img src='../images/performance-evaluation-gas-turbine-fuel-cell-hybrid-micro-generation-system--001.jpg' alt='performance-evaluation-gas-turbine-fuel-cell-hybrid-micro-generation-system- ' style='margin-left:20px;border-style:solid;border-width:1px;border-color:black;'> </TD></TR></TABLE><table border=1px solid blackstyle =width:50%> <tr> <td><b>Capstone Turbine For Sale </b>- Microturbine C30 C65 C200 C600 C800 C1000 - <a href="http://www.globalmicroturbine.com">Go to microturbine website</a> </td> </tr> </tr> </table> <p> </p> <script> (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) })(window,document,'script','https://www.google-analytics.com/analytics.js','ga'); ga('create', 'UA-85515761-1', 'auto'); ga('send', 'pageview'); </script><address> <p>Search Engine Contact: <a href="mailto:greg@globalmicroturbine.com?subject="Microturbine">greg@globalmicroturbine.com</a></p><p><br /></p></body></html>