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1、StirlingEnginesforDistributedLow-CostSolar-Thermal-ElectricPowerGenerationDuetotheirhighrelativecost,solar-electricenergysystemshaveyettobeexploitedonawidespreadbasis.Itisbelievedintheenergycommunitythatatechnologysimilartophotovoltaics,butofferedatabout$1/W,wou
2、ldleadtowidespreaddeploymentatresi-1ArtinDerMinassiansdentialandcommercialsites.Thispaperaddressesthefeasibilitystudyofalow-coste-mail:artin.der.minassians@gmail.comsolar-thermalelectricitygenerationtechnology,suitablefordistributeddeployment.Spe-cifically,wedisc
3、ussasystembasedonnonimagingsolarconcentrators,integratedwithSethR.Sandersfree-pistonStirlingenginedevicesincorporatingintegratedelectricgeneration.WetargetProfessorconcentratorcollectoroperationatmoderatetemperatures,intherangeof120°Ctoe-mail:sanders@eecs.berkel
4、ey.edu150°C.Thistemperaturerangeisconsistentwiththeuseofopticalconcentratorswithlow-concentrationratios,wideanglesofradiationacceptancewhicharecompatiblewithDepartmentofElectricalEngineeringandnodiurnaltrackingandnooronlyafewseasonaladjustments.Therefore,costsan
5、dComputerSciences,reliabilityhazardsassociatedwithtrackinghardwaresystemsareavoided.ThispaperUniversityofCalifornia,Berkeley,furtheroutlinesthedesign,fabrication,andtestresultsofasingle-phasefree-pistonBerkeley,CA94720Stirlingengineprototype.Averylowlossresonant
6、displacerpistonisdesignedforthesystemusingaverylinearmagneticspring.Thepowerpiston,whichisnotmechanicallylinkedtothedisplacerpiston,formsamass-springresonatingsubsystemwiththegasspring,andhasaresonantfrequencymatchedtothatofthedisplacer.Thedesignofheatexchangers
7、isdiscussed,withanemphasisontheirlowfluidfrictionlosses.Onlystan-dardlow-costmaterialsandmanufacturingmethodsarerequiredtorealizesuchama-chine.Thefabricatedengineprototypeissuccessfullytestedasanengine,andtheex-perimentalresultsarepresentedanddiscussed.Extensivee
8、xperimentationonindividualcomponentsubsystemsconfirmsthetheoreticalmodelsanddesignconsiderations.Basedontheexperimentalresultsandtheverifiedcomponentmodels,anappropriat
