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ID:51038291
大小:989.00 KB
页数:29页
时间:2020-03-17
《太阳能光热资料汇总(英文版).ppt》由会员上传分享,免费在线阅读,更多相关内容在PPT专区-天天文库。
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
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