东西轴向横置真空集热管内不同形状吸热体能量收益的研究α

a(,,100083)(,100075):,,4040,,,:,,,0[1][2][3],1,1O,YZ;Z;ZXYZ1,CWHTB,XOZZC,YOZZWZHT(),XOYXB()tg2HT=tg2C+tg2WtgB=tgWötgC20119991ACTAENERGIAESOLARISSINICAVol120,No11Jan.,1999a1998202218©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.1tg2W=tg2HTtg2Bö(1+tg2B)tg2C=tg2HTö(1+tg2B)ff=Ir(C,W)A(HT)ds(1),Ir(C,W),A(HT),,1AHTA(HT)=-8.4259310-7HT3+4.5602510-5HT2+2.2174110-5HT+0.918525(2),,,(D=0.089m)1AHT()HT01020304050607080A0.920.920.930.930.940.920.900.850.78111ff=Ir(C,W)A(HT)D,Ir(C,W)A(HT),DIr(C,W)-C-WIr(C,W)=C0(W)+C1(W)C+C2(W)C2+C3(W)C3(3):C0(W)=-1.4120410-6W3-0.0134787W2-0.0119879W+89.1005C1(W)=1.6694510-6W3-0.000295129W2+0.0106837W-0.0112438C2(W)=-1.7036910-7W3+2.129310-5W2-0.000578698W-0.0130739C3(W)=1.7195610-9W3-1.8382510-7W2+5.1600510-6W+2.4052610-5112HT,CWIC(C,W)A(HT)ff=Ir(C,W)A(HT)D()4120©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.Ir(C,W)A(HT)(C,W)Ir(C,W)A(HT)=D0(W)+D1(W)C+D2(W)C2+D3(W)C3(4):D0(W)=-5.5657410-6W3-0.0139906W2+0.0872366W+84.2803D1(W)=-1.2918910-7W3-5.2924410-6W2-1.9627210-4W+0.0941833D2(W)=1.6083710-8W3-2.7080610-6W2+1.8071510-5W+0.00939139D3(W)=1.1412510-12W4+8.2873110-11W3-1.6251510-8W2+1.3199410-7W+3.4930310-5113W(1),ff=Ir(W)A(W)D,Ir(W)A(W)W2,D2Ir(W)A(W)WW01020304050607080Ir(W)A(W)84.4483.7880.7274.0865.3353.0438.8322.366.71Ir(W)A(W)=-5.2083310-7W4+4.0138910-5W3-0.0151521W2+0.0952421W+84.418(5)2,,,[4],Jordan[5],;,,IDN=Aexp(-BösinAs),A,B,AsAB3,,,1020à4040,HT75As0q=IDNf511:©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.3121221321421521621A(Jöm2min)B73812.960.14272866.640.14471163.260.15668135.040.18066242.400.19665296.080.205721821921102111211221A(Jöm2min)B65106.820.20766431.660.20169081.360.17771541.790.16073245.170.14974002.220.142E=qdX,XHT75As0324,,,,11%15%,24%43%;1417%2411%,812%1117%,,2411%,(a)(321)(b)(621)6120©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.(c)(921)(d)(1221)2,.,1,2,34(MJöm)1.681.871.941.461.601.621.591.761.831.301.491.61öö1.1101.1501.0891.1091.1101.1471.1471.2413,.,1,2,3711:©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.5698MJöm641MJöm553MJöm627MJöm601MJöm540MJöm(ö)0.900.940.9835,1519%2612%,1113%1611%;,41,26%,10%,440(,),,,;,37384(1),1611%,2612%(2),,,(3),,8120©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.1,,11,1995,15(4)2662,,11,1996,17(1)15213,,11,1997,18(3)2622684JA,WA121,,19805ASHRAEHandbookandProductDirectory.FundamentalsVolume.NEWYorkASHRAE,1977ASTUDYONENERGYGAINONABSORBERSWITHDIFFERENTSHAPESINEVACUATEDCOLLECTORTUBESOFEAST-WESTAXIALHORIZONTALORIENTLiWeiGeHongchuan(BeijingSolarEnergyResearchInstitute,NationalEngineeringResearchCentreforRenewableEnergyBeijing100083)MaYiqing(BeijingFirstTeachersSchool,Beijing100075)Abstract:Basedonmeasuringvaluesofrelativesolarirradiationonabsorberswithdifferentshapesinevacuatedcollectortubesaswellasmeasuringvaluesofsolarabsorptivitychangingwithincidentanglesonthecoating,thispaperanalyzedandinvestigatedregularpatternsofenergygainfactorschangingwithincidentanglesforthreedifferentabsorbersincludingflatsemicylindricandcylindricabsorbersinglasstubesenvelope.AccordingtotheClear2DayModel,dailyenergygainanditsannualvariationforsingleevacuatedcollectortubesofeast2westaxialhorizontalorientwiththreedifferentabsorbersplacedinnorthlatitude40,in2clinedangle40andsouthernorienthavebeencalculatedandcompared.Theresultsshowthatsuperiorityofeast2westaxialhorizontalevacuatedcollectortubeswiththesemicylindricabsorberandthecylindricabsorbertotheflatabsorberisfarlessthansouth2northaxialslantevacuatedcollectortubesonnotonlyinstantaneousenergygainbutalsoannualenergygain.Keywords:evacuatedcollectortube,energygain,energygainfactor,relativesolarirradiance,absorber,east2westaxialhorizontalevacuatedcollectortube,south2northaxialslantevacuat2edcollectortube911:©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.