太阳能光热资料汇总(英文版).ppt

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1、HowSolarHeatingSystemWorks???Asolarwaterheatingsystemcomprisessolarcollectors,astoragetankandinterconnectingpipework.Thesolarcollectorsareusuallymountedonroofofabuildingtocapturesolarradiation.Smalltubesrunthroughthesolarcollectorsandcarryliquid–eitherwaterorheattransferliquidwithlowbo

2、ilingpoint.Theheatpipeabsorbsheatfromthesolarcollectorsandtransfersheattoincomingwater.BenefitsofsolarwaterheatingHotwaterthroughouttheyear:thesystemworksallyearround,thoughyou'llneedtoheatthewaterfurtherwithaboilerorimmersionheaterduringthewintermonths.Cutyourbills:sunlightisfree,soon

3、ceyou'vepaidfortheinitialinstallationyourhotwatercostswillbereduced.Cutyourcarbonfootprint:solarhotwaterisagreen,renewableheatingsystemandcanreduceyourcarbondioxideemissionsIngeneral,solarwaterheatingsystemsfallsinto2types:ActiveandPassive.CommonTypesofSolarWaterHeatingSystemsAnactives

4、ystemusesanelectricpumptocirculatewaterorheattransferfluidfromstoragetanksthroughthecollector.Whereasapassivesystemreliesongravityandthetendencyforwatertonaturallycirculateasitisheated,allowingwaterorheattransferfluidtomovethroughthesystemwithouttheuseofacirculatingpump.Activesolarwate

5、rheatingsystems:Activesolarwaterheatingsystemsarecharacterizedaseitherdirect(alsocalled“openloop”)orindirect(alsocalledclosedloop)dependingonwhethertheincomingwaterisheateddirectlyinthecollectorsorindirectlyheatedviaaheatexchanger.AutomaticsolarcontrollerTemperaturesensoroncollectorTem

6、peraturesensoronstoragetankSolarcirculationpumpColdwaterinflowHotwaterrun-offTemperaturesensorforadditionalheatingElementsofasolarheatingsystemforhotwater:DirectsolarheatingsystemPumpscirculatehouseholdwaterthroughthecollectorsandintothehome.Theyworkwellinclimateswhereitrarelyfreezes.A

7、ctiveindirectwaterheaterAlsoknownasanactiveclosed-loopsystem,asolarheaterthatcirculatesafluidotherthanwater(suchasdilutedantifreeze)throughacollector.Thecollectedheatistransferredtothehouseholdwatersupplyusingaheatexchanger.Indirectsolarwaterheatersarepopularinclimatespronetofreezing