帶夾層換熱水箱的平板型自然循環(huán)太陽熱水系統(tǒng)性能研究.pdf

1、云南師范大學碩士學位論文帶夾層換熱水箱的平板型自然循環(huán)太陽熱水系統(tǒng)性能研究姓名：黃金保申請學位級別：碩士專業(yè)：農(nóng)業(yè)生物環(huán)境與能源工程指導教師：浦紹選高文峰20060522云南師范大學碩士學位論文AbstractTheexploitationandutilizationofsolarenergyisaimportantpartofthatofnewandrenewableenergyThedevelopmentandgeneralizat

2、ionofsolarwaterheatersaccordwithsustainabledevelopmentpolicyinChinaAtfirst，currentsituationofsolarwaterheaters，freezeprotectiontechniques，andsomecommonheatexchangersusedinsolarwaterheatersandtheircharacteristicsareintrod

3、ucedinthispaperAsuccessfultechniqueforfreezeprotectionisbasedontheuseofaheatexchangersseparatingthepotablewaterfromtheworkingfluidincollectorheatexchangersloopThemantleheatexchangerhasbeenusedextensivelyinothercountriesa

4、sithassomeadvantages，suchashighheattransferrates，simplicityofconstructionandlowmanufacturingcostsInthispaperbasedontheprincipleofthermosyphon—typesolarhotwatersystemswhichareadvancedinforeigncountries，mantleheatexchanges

5、inthermosyphonfiatplatesolarwaterheatershavebeendesigned，andatheoreticalanalysisandexperimentalstudyofmantleheatexchangersandthermalperformanceinthermosyphonflatplatesolarwatersystemshasbeenundertakenWeanalyzedtheeffecto

6、nthecollectorefficiencyofusingaheatexchangeranddetermineda“heatexchangerpenalfactor”Theheattransferperformanceofmantleheatexchangeswastestedintheconditionofdifferentwidthofmantlegapanddifferentquantityofworkingfluidinama

7、ntlegap，andtotalheattransfercoefficientofmantleheatexchangerswasdeterminedExperimentresultsshowthatthereisacorrelationbetweenthevalueoftotalheattransfercoefficientandthewidthofmantlegap，theheattransferperformanceofmantle

8、heatexchangesisbetterwhenthewidthofmantlegapissmaller，andthevalueoftotalheattransfercoefficientofmantleheatexchanges、Ⅳitll15mmgapisupt01lOW／m，andthemorequantityofworkingfluidinamantlegapis，thebetterheattranferperformance

9、ofmantleheatexchangesis，andtheheattransferperformanceofmantleheatexchangeswillbeimprovedobviouslyifthereisaboardinamantlegapA10tofoutdoortestsofthermalperformanceofthesolarwaterheatingsystemshavebeentaken，andamathematica