Nyob rau hauv xyoo tas los no, nrog rau kev loj hlob sai ntawm lub hnub ci tsim hluav taws xob, lub zog tshiab tsheb, thiab 5G kev sib txuas lus, cov khoom siv hluav taws xob nyiam nrog cov thermal conductivity siab ---- aluminium alloy, kuj tau nce nqi los ntawm tib neeg.
Rau lub hnub ci hluav taws xob tsim hluav taws xob, qhov ua tau zoo ntawm inverter yog qhov tseem ceeb los txiav txim siab kev ua haujlwm ntawm lub hnub ci photovoltaic systems. Photovoltaic inverter yog ib hom hluav taws xob hluav taws xob hluav taws xob uas hloov cov tam sim no ncaj qha uas yog tsim nyob rau hauv photovoltaic modules rau alternating tam sim no. Nws cov khoom tseem ceeb suav nrog cov hloov pauv hloov pauv (IGBT, MOSFET), cov khoom sib nqus (inductor, transformer), thiab lwm yam. Yog tias lub photovoltaic inverter tsis ua haujlwm vim qhov kub siab, nws yuav ua rau lub kaw lus photovoltaic kaw, ua rau lub zog loj poob;
Rau lub zog tshiab hluav taws xob tsheb, qib kev txawj ntse thiab hluav taws xob tau nce ib hnub dhau ib hnub, thiab cov cua kub dissipation ntawm lawv cov khoom siv hluav taws xob sab hauv yuav cuam tshuam ncaj qha rau kev nyab xeeb ntawm tag nrho lub tsheb;
Rau 5G hauv paus chaw nres tsheb, lawv lub zog siv yog 2.5-3.5 npaug ntawm 4G. RRU (Radio Remote Radio Unit) yog ib qho khoom siv tseem ceeb hauv 5G cov chaw nres tsheb, muab cov kev ruaj khov thiab txhim khu kev qha rau cov neeg siv cov ntaub ntawv sib pauv, ua kom cov ntaub ntawv raug thiab sijhawm tiag tiag.
Hauv kev ua haujlwm, txhua qhov module yuav tsim kom muaj cua sov ntau. Yog hais tias tsis dissipated nyob rau hauv lub sij hawm, nws yuav ua rau ib tug kub nce nyob rau hauv lub internal ib puag ncig.
Thaum qhov ntsuas kub siab tshaj, cov khoom siv hluav taws xob yuav tsis ua haujlwm ruaj khov, uas yuav cuam tshuam rau lub sijhawm ntawm cov neeg siv cov ntaub ntawv xa mus thiab tseem ua rau lub neej ua haujlwm luv.
Ntxiv nrog rau cov teb saum toj no, lwm yam khoom xws li lub zog loj LED teeb thiab fiber ntau optic modules hauv kev sib txuas lus muaj cov kev xav tau siab rau cov cua sov dissipation.
Cov khoom siv hluav taws xob hauv cov khoom siv no muaj qhov ntsuas kub ua haujlwm. Yog tias qhov kub tsis tuaj yeem hloov mus rau lub ntiaj teb sab nraud thiab qhov kub thiab txias ntxiv mus, nws yuav nce siab.
Txhawm rau kom tswj tau qhov kub thiab txias ntawm cov khoom siv hluav taws xob hauv cov khoom siv hauv cov khoom siv hauv qhov ntsuas kub, ua kom lawv cov txiaj ntsig thiab kev pabcuam lub neej, nws yog qhov yuav tsum tau siv cov ntaub ntawv thermal conductive los hloov cov cua sov sab hauv ntawm lub cuab yeej.
Yog li ntawd, cov khoom siv thermal conductivity siab siv rau kev tsim cov heatsinks yeej ib txwm yog qhov tseem ceeb ntawm kev tshawb fawb.
Optical Module
5G kev sib txuas lus hauv paus chaw nres tsheb
Multimedia vaj tse ntawm ib lub tsheb tshiab zog
Txhais ntawm thermal conductivity
Thermal conductivity yog qhov ntsuas qhov ntsuas uas qhia txog cov thermal conductivity ntawm cov khoom. Nws qhia txog cov thermal conductivity nyob rau hauv ib chav tsev lub sij hawm, ib chav tsev cheeb tsam, thiab nyob rau hauv ib tug tsis zoo kub gradient, nyob rau hauv units ntawm W / m · K los yog W / m · degree.
Cov thermal conductivity coefficients ntawm cov khoom muaj nyob rau hauv Table 1:
Table 1 Thermal conductivity coefficients ntawm cov khoom sib txawv
Hlau haum raws li cov khoom siv cua sov dab dej
Los ntawm Table 1, nws tuaj yeem pom tau tias rau cov khoom siv hlau, cov cua kub dissipation coefficients ntawm kub, nyiaj, tooj liab, thiab txhuas tag nrho tshaj 200W / (m · K), tag nrho cov ntawm lawv qhia tau zoo heev thermal conductivity.
Txawm li cas los xij, kub thiab nyiaj tsis tuaj yeem siv dav vim lawv qhov kev ntxhib los mos, siab ceev, thiab tus nqi siab;
Lub thermal conductivity coefficient ntawm tooj liab kuj yog siab heev, uas tuaj yeem cuam tshuam los ntawm cov xwm txheej tsis zoo xws li tsis txaus hardness, siab ceev, me ntsis nqi, thiab kev ua haujlwm siab, thiab tsis tshua siv nyob rau hauv lwm yam ntawm cov cua kub dab dej fins;
Aluminium, raws li cov hlau uas muaj cov ntsiab lus siab tshaj plaws nyob rau hauv lub ntiaj teb lub crust, yog nyiam vim nws cov thermal conductivity, tsawg ntom, thiab tus nqi qis. Txawm li cas los xij, vim qhov tsis tshua muaj siab ntawm cov ntshiab aluminium, ntau cov khoom siv mis feem ntau yog ntxiv rau hauv ntau daim ntawv thov kev lag luam los ua aluminium alloys, uas tau txais ntau yam ntxwv uas ntshiab txhuas tsis muaj thiab dhau los ua qhov kev xaiv zoo tshaj plaws rau cov khoom siv hluav taws xob.
Aluminium alloy heatsink
Txoj kev tshawb fawb ntawm thermal conductive aluminium alloys feem ntau muab faib ua ob pawg: deformed aluminium thiab cam khwb cia txhuas, txhua tus muaj cov yam ntxwv sib txawv.
Deformed aluminium alloys: Muaj kev tshawb fawb txog thermal conductivity ntawm aluminium alloys feem ntau tsom rau deformed aluminium alloys. Deformed aluminium alloys rau thermal conductivity yog tsuas yog siv nyob rau hauv teb xws li tsheb thiab electronics, xws li txhuas alloy radiators, cua sov, cua txias, thiab lwm yam.
Piv nrog rau cov tsoos tooj liab lossis steel kub dab dej, aluminium heatsinks muaj qhov zoo xws li lub teeb yuag, zoo corrosion kuj, thiab tsis tshua muaj nqi khiav lag luam, thiab tau siv dav. Nyob rau hauv cov nqe lus ntawm lub computer cua sov dab dej, aluminium heat sinks tau dhau los ua lub ntsiab, hloov tooj liab / steel cua sov dab dej thiab yas kiv cua. Qhov tsis zoo ntawm deformed aluminium alloy yog tias nws yog qhov nyuaj rau kev ua kom lub luag haujlwm ntawm cov qauv.
Casting aluminium alloy: Casting belongs rau solidification forming thiab tam sim no yog cov txheej txheem zoo tshaj plaws rau kev tsim cov txheej txheem nyuaj. Rau cam khwb cia txhuas alloys, thiaj li yuav xyuas kom meej lub filling kev ua tau zoo thiab txhua yam khoom ntawm lub alloy, nws yog feem ntau yuav tsum tau ntxiv ntau alloy ntsiab. Silicon hauv cam khwb cia txhuas alloys tuaj yeem txhim kho qhov fluidity ntawm cov hlau, tab sis raws li cov ntsiab lus silicon nce, thermal conductivity txo. Yog li ntawd, qhov nyuaj hauv kev tsim cov thermal conductivity cam khwb cia aluminium alloys nyob rau hauv kom ntseeg tau zoo fluidity thaum tseem tswj siab thermal conductivity los ntawm alloy tsim thiab microstructure tswj.
Cov nyhuv ntawm kev kho cua sov ntawm thermal conductivity
Kev kho cua sov ntawm aluminium alloys feem ntau suav nrog kev daws teeb meem, kev laus, thiab annealing, thiab lawv cov teebmeem ntawm thermal conductivity txawv.
Kev kho cov kuab tshuaj: Tom qab cov khoom siv kho mob, cov thermal conductivity thiab thermal diffusion kev ua tau zoo ntawm aluminium alloy nyob rau hauv uas cov ntsiab lus muaj nyob rau hauv lub xeev cov tshuaj yog qis dua cov nyob rau hauv aluminium alloy matrix thaum lub caij theem yog precipitated. Yog vim li cas yog tias tom qab cov khoom siv kho mob, cov khoom siv tau txais kev hloov pauv tseem ceeb, thiab qee cov ntsiab lus alloy thiab cov theem ntxiv yuav yaj dua hauv matrix, tsim cov tshuaj supersaturated, ua rau cov lattice distortion loj, muaj zog ntxiv, thiab txo thermal conductivity.
Kev laus kev kho mob: Kev laus kev kho mob tuaj yeem muab faib ua qhov kub thiab txias aging thiab low-temperature aging. Thaum lub sij hawm kub kub aging, atomic diffusion yog ib qho yooj yim, thiab kev kho ceev ntawm qhov chaw ua hauj lwm thiab dislocation defects nyob rau hauv lub alloy yog sai dua. Lub thermal conductivity yuav ncav cuag nws tus nqi siab tshaj plaws hauv lub sijhawm luv luv. Nrog rau kev ncua sij hawm, cov thermal conductivity yuav muaj kev poob qis, feem ntau yog vim cov khoom siv ntau dhau Si thiab lwm yam hauv cov qauv hlau thiab kev loj hlob ntawm precipitated theem ntawm kub kub; Thaum lub sij hawm qis-kub laus laus, vim qeeb atomic diffusion thiab tsawg tsawg ntawm cov ntsiab lus xws li Si ntawm qhov kub thiab txias, lub sij hawm rau thermal conductivity mus txog nws lub ncov yog ho ntev dua thaum lub sij hawm kub kub, thiab kev txhim kho hauv thermal conductivity tsis yog. tseem ceeb npaum li thaum kub kub aging.
Annealing kev kho mob: sib txawv annealing kub thiab txias txoj kev muaj sib txawv los ntawm thermal conductivity ntawm txhuas alloys. Raws li qhov kub ntawm annealing nce, lub thermal conductivity txo, thiab qib ntawm thermal conductivity kuj txawv nrog ntau txoj kev txias. Qhov no yog vim hais tias thaum lub annealing kub tseem nce, ntau theem thib ob nyob rau hauv lub aluminium alloy yaj nyob rau hauv lub aluminium matrix, ua rau kom ib tug nce nyob rau hauv cov khoom solubility ntawm alloy ntsiab, ua rau mob heev lattice distortion thiab cuam tshuam lub zog ntawm dawb electrons, uas ua rau kom muaj zog solubility ntawm alloy ntsiab. txo cov thermal conductivity. Cov thermal conductivity tau los ntawm txoj kev ua kom txias qeeb nrog lub cub tawg yog siab dua li ntawm txoj kev txias ceev, vim tias qhov qeeb qeeb ntawm qhov txias txias, qhov zoo dua yog rau nag lossis daus ntawm cov khoom siv atoms.
Yog li ntawd, txhawm rau ua tiav cov thermal conductivity ntau dua, qhov qis dua qhov kub thiab txias txoj kev nrog rau qhov cub txias yuav tsum tau xaiv.
