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Introduction
Inthepreviouschapters,,seetheappendixsectionofthisresearch.
ProgrammingLanguage
,matrix-.
GeneralDescription
,'(>>)intheMatlabcommandwindow,'smonitor,
Enter1atthecursorlocationtoreadthecontentoftheprogram
Toexittheprogramenter0atthecursorlocation,and
EnterPVblockneededforanalysis.
Afterenteringeachinputvariablerequestedbytheprogram,,,,ifthemonthchosentodeterminetheinsolationforaflatcollectorisJanuary,whichmeansanumericalvalueofone(1)wasenteredwhenthemonthvariablewasrequested,andyouwanttoknowhowmuchinsolationisavailableatthelocationforaparticulardayandtime,,suchas35isentered,,theprogramwilldisplaythefollowingmessageonthescreen:“CheckYourInputVariables”andwillstopexecutingthis
,,acompleteanalysisofpredictingtheamountofinsolationavailableatalocation,,,.
-ProgramContent
ofthisblockisobtainedbyentering1whenstatement3aboveappearsonthecomputerscreen.
-ComputationofLocalVariables
Toexecutethisblockoftheprogram,,;
TheSolarConstantinKW/m2
TheAltitudeofthelocationinKilometers(Km)
TheLatitudeofthelocation
TheTypeofClimateofthelocation
TheLocalLongitudeforthelocation
TheLongitudeofStandardMeridianforthelocation,and
TheStandardClockTimeofthelocation
.
PV3-InsolationEstimateForAFlatCollector
Toexecutethisblockoftheprogram,;
InstantaneousInsolation:Thisistheamountofinsolationavailableforachosendayandtimeatthelocationforaparticularmonthoftheyear.
TotalInsolation:Thistheamountofinsolationavailableatthelocationbetweenaspecifiedtimeintervalforaparticulardayandmonthoftheyear.
DailyInsolation:Thistheamountofinsolationavailableatthelocationforalldaysofaspecifiedmonth.
Thefollowingvariablesareneedtoexecutethisblockoftheprogram;
Hemisphereofthelocation
Monthoftheyear(January=1andDecember=12)
DayoftheMonthspecifiedbytheJulianDay
TimetoComputeInstantaneousInsolation
TimetoBeginRecordingInsolation
TimetoStopRecordingInsolation
Theoutputfilesforthisblockoftheprogramcanbeobtainedbyenteringtheappropriatevaluetoeachoutputquestionwhenitappearsonthecomputerscreen.
PV4-InsolationEstimateForATiltCollector
Thisblockoftheprogramperformsthesametaskastheblock,PV3above,;
AzimuthAngle.
,ifthelatitudeofalocationis35degreesandthecollectorhastobetiltedatangleof45degrees,.
PV5-RangeofInsolationLevels
Thisblockoftheprogramusesthesevengroupclassificationgivenin[16],thenestablishesupperandlowerinsolationlimitsforwhichdayssatisfyingthevariouslimitswillclassifiedasmostlysunny,partlysunny,partlycloudy,cloudy,,theoutputfilespecifyingtherangeofinsolationlevelscanbeobtained.
PV6-ClassificationofDaysbyInsolationLevels
Thisblockoftheprogramisusedtoselectthedaysofthemonththatwillbeclassifiedassunny,mostlysunny,partlysunny,partlycloudy,cloudy,overcastandrain/,,ifthemonthselectedtodoaflatcollectoranalysisinPV3wasApril,whichmeansanumericalvalueoffour,(4),wasenteredforthemonthvariable,,theerrormessage,“CheckYourInputVariables”,,.
;
TheTypeofCollectorusedintheanalysis
TheYearforwhichdataisavailabletocompare
TheMonthoftheyear
Thereisnooutputfileforthisblockoftheprogram.
PV7-AdjustmentofClearSkyInsolation
;
TheTypeofCollectorUsedintheAnalysis
TheMonthoftheYear
Theoutputfilesforthisblockoftheprogramcanbeobtainedbyfollowinginstructionsthatappearonthecomputermonitor.
PV8-PhotovoltaicModuleCharacteristics
;
TheLengthoftheModuleinMeters
TheWidthoftheModuleinMeters
TheRatedPoweroftheModuleinWatts
TheCurrentattypicalloadinWatts
TheShort-CircuitcurrentinWatts
TheVoltageattypicalloadinVolts
TheOpen-CircuitvoltageinVolts
Theoutputfiletothisblockoftheprogramcanbeobtainedbyfollowinginstructionsthatappearonthecomputermonitor.
PV9-PhotovoltaicArrayAnalysis
;
LoadEnergyDemand
TypeofLoad()
EfficiencyofthePowerConditioningUnit(BasedonthetypeofLoad)
TheNumberofPowerConditioningUnits
ThePackingFactoroftheModule
TheTemperatureCorrectionFactoroftheModule
TheSoilingFactor
AmountofSolarEnergyforonedayatthelocation
TheNumberofModulesbasedonthedecisionwhethertorounduporrounddown
TheNumberofSub-ArrayFields
TheNumberofModulesinParallelperSub-Array
TheNumberofModulesinSeriesperSub-Array
TheOperatingFrequencyoftheArray(Basedonthepowerconditioningunit)
TheOutputCurrentoftheArray(Basedonthepowerconditioningunit)
.
PV10-EnergyOutputAnalysisofaPhotovoltaicSystem
',.
PV11-StorageRequirementsofaPhotovoltaicSystem
-;
Coldest24-hourTemperatureatthelocation
CapacityCorrectionFactoroftheselectedBattery
MaximumDepthofDischargeoftheBattery
SystemAvailabilityoftheproposedPVSystem
IndividualBatteryCapacity
Nominal