고집광 태양광 발전을 위한 광학시스템 렌즈 개발
The Development of the Lens of the Optical System for High Concentration Solar PV System
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초록
Theartificialincreaseinthesolarintensityincidentonsolarcellsusinglensesormirrorscanallow solarcells togenerateequivalentpowerwith alowercost.Therearetwotypesofconcentration opticsforsolarenergy conversion.Oneistousemirrors,andtheotheristouseFresnellenses.Thegainsthatcanbeachievedwitha Fresnellens ora parabolic mirrorarecompared.The resultshowed the gains are comparable and thetwo configurationsweredevelopedcompetitively.InapplicationareasofFresnellensesassolarconcentrators,several variationsofdesignweredevisedandtested.SomePV systemsstillusecommerciallyavailableflatFresnellenses asconcentrators.A convexlinearFresnellenstoimprovetheconcentrationratioandtheefficiencyisdevisedand flatlinearFresnellensinthermalenergycollectionisutilized.Inthisstudy,wedesignedandoptimizedflatFresnel lensandthe‘lightpipe’todevelop500X concentratedsolarPV system.Intheprocess,wecomparethetransmission efficienciesaccordingtogroovetypes.WeperformedrigorousraytracingsimulationoftheflatFresnellenses.The computeraidedsimulationshowedthe‘groovesincase’hasthebetterefficiencythanthatof‘groovesoutcase’. Basedontheray-traceresultswedesignedandmanufacturedsampleFresnellenses.Theopticalperformancewere measuredandcomparedwithray-traceresults.Finally,theopticalefficiencywasmeasuredtobeabove75%.All thedesignandmanufacturingwereperformedbasedonthatInGaP/InGaAs/Getriplejunctionsolarcellisusedto convertthephotonenergytoelectricalpower.Fieldtestwillbemadeandanalyzedinthenearfuture.
Abstract
Theartificialincreaseinthesolarintensityincidentonsolarcellsusinglensesormirrorscanallow solarcells togenerateequivalentpowerwith alowercost.Therearetwotypesofconcentration opticsforsolarenergy conversion.Oneistousemirrors,andtheotheristouseFresnellenses.Thegainsthatcanbeachievedwitha Fresnellens ora parabolic mirrorarecompared.The resultshowed the gains are comparable and thetwo configurationsweredevelopedcompetitively.InapplicationareasofFresnellensesassolarconcentrators,several variationsofdesignweredevisedandtested.SomePV systemsstillusecommerciallyavailableflatFresnellenses asconcentrators.A convexlinearFresnellenstoimprovetheconcentrationratioandtheefficiencyisdevisedand flatlinearFresnellensinthermalenergycollectionisutilized.Inthisstudy,wedesignedandoptimizedflatFresnel lensandthe‘lightpipe’todevelop500X concentratedsolarPV system.Intheprocess,wecomparethetransmission efficienciesaccordingtogroovetypes.WeperformedrigorousraytracingsimulationoftheflatFresnellenses.The computeraidedsimulationshowedthe‘groovesincase’hasthebetterefficiencythanthatof‘groovesoutcase’. Basedontheray-traceresultswedesignedandmanufacturedsampleFresnellenses.Theopticalperformancewere measuredandcomparedwithray-traceresults.Finally,theopticalefficiencywasmeasuredtobeabove75%.All thedesignandmanufacturingwereperformedbasedonthatInGaP/InGaAs/Getriplejunctionsolarcellisusedto convertthephotonenergytoelectricalpower.Fieldtestwillbemadeandanalyzedinthenearfuture.
참고문헌 (9)
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