Daim Ntawv Qhia Qhov Kawg Rau Cov Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob: Cov Cai Ua Haujlwm, Hom, thiab Kev Xaiv
Taw qhia
Nyob rau hauv lub ntiaj teb niaj hnub no ntawm siab - hluav taws xob hluav taws xob- los ntawm servers thiab inverters mus rau LED teeb pom kev zoo thiab hluav taws xob tsheb - tswj cov cua sov yog qhov tseem ceeb rau kev ua haujlwm thiab kev ntseeg tau. Kev txheeb cais qhia tiastshaj 55% ntawm cov hluav taws xob tsis ua haujlwm yog qhov kub thiab txias - cuam tshuam. Raws li cov khoom siv me me thiab muaj zog dua, cov txheej txheem cua txias feem ntau poob qis. Nkag mus raucua sov yeeb nkab cua sov dab dej: passive, ua tau zoo thermal tswj kev daws teeb meem uas sib txuas cov ntsiab lus ntawm theem- hloov pauv cov cua sov nrog cov qauv tsim fin.
Cov lus qhia dav dav no yuav qhia koj txog txhua yam koj xav paub txog cov yeeb nkab cua sov: lawv ua haujlwm li cas, lawv cov khoom tseem ceeb, ntau hom, kev ntsuas kev ua tau zoo, thiab yuav xaiv qhov zoo li cas rau koj daim ntawv thov. Peb tseem yuav sib piv cov kav dej kub nrog cov tshuab vapor chamber los pab koj txiav txim siab txog engineering.
Dab tsi yog Qhov Kub Kub Pipe?
Ua ntej dhia mus rau hauv cov yeeb nkab cua sov, nws yog ib qho tseem ceeb kom nkag siab cov lus nug tseem ceeb:dab tsi yog alub cev kub?
A lub cev kubyog lub tshav kub- hloov khoom siv uas sib txuas cov ntsiab lus ntawm ob qho tib si thermal conductivity thiab theem kev hloov mus rau kev hloov cov cua sov ntawm ob qho khoom sib txuas. Thawj patented los ntawm RS Gaugler ntawm General Motors hauv 1942 thiab tom qab ntawd nws tus kheej tsim los ntawm George Grover ntawm Los Alamos National Laboratory hauv 1963, cov kav dej kub tau dhau los ua qhov tseem ceeb hauv cov tshuab hluav taws xob niaj hnub no.
Kev zoo nkauj ntawm cov yeeb nkab cua sov yog nyob rau hauv nws txoj kev yooj yim: nws tsis muaj qhov txav txav, tsis tas yuav tsum muaj lub zog sab nraud, thiab tuaj yeem hloov cov cua sov ntau pua zaus ntau dua li cov khoom siv tooj liab ntawm tib qhov ntev.
Cov kav dej kub ua haujlwm li cas?
Kev nkag siabCov kav dej kub ua haujlwm li casyog qhov tseem ceeb rau txhua tus neeg koom nrog hauv kev tswj xyuas thermal. Kev ua haujlwm yog nyob ntawm kev ua kom tsis tu ncua -condensation voj voog:
Plaub- kauj ruam voj voog
Evaporation: Nyob rau ntawm qhov kub kub interface (evaporator seem), cov kua nyob rau hauv kev sib cuag nrog ib tug thermally conductive khoom nto hloov mus rau hauv vapor los ntawm absorbing tshav kub los ntawm qhov chaw.
Vapor Flow: Cov vapor ces mus raws cov yeeb nkab cua sov mus rau qhov txias interface (condenser seem), uas tau tsav los ntawm lub siab gradient tsim thaum lub sij hawm evaporation.
Condensation:Lub vapor condenses rov qab mus rau hauv cov kua nyob rau hauv lub txias kawg, tso lub latent cua sov ntawm vaporization.
Rov qab Flow:Cov kua rov qab mus rau qhov kub kub los ntawm kev ua haujlwm capillary (ntawm cov qauv wick), lub zog centrifugal, lossis lub ntiajteb txawj nqus, thiab lub voj voog rov ua dua.
Cov theem no - hloov mechanism ua rau ib qhozoo thermal conductivity 100 mus rau 1000 zaug siab duatshaj li ntawm cov khoom siv tooj liab, ua kom cov cua sov tuaj yeem thauj mus rau qhov chaw nrog qhov kub thiab txias tsawg.
Cov Khoom Siv Hluav Taws Xob thiab Cov Khoom Siv Hluav Taws Xob
Ib qho yeeb nkab cua sov muaj peb qhov tseem ceeb:
1. Lub hnab ntawv
Cov yeeb nkab kaw uas muaj cov kua dej ua haujlwm. Cov ntaub ntawv uas muaj xws li:
Tooj: Feem ntau rau cov khoom siv hluav taws xob txias, thermal conductivity zoo heev
Aluminium: Lub teeb yuag, siv nrog ammonia ua haujlwm kua rau lub dav hlau
Stainless hlau: Rau siab -kub los yog corrosive ib puag ncig
2. Wick Structure
Lub hauv paus ntxeem tau hauv lub raj uas siv cov tshuaj capillary kom rov qab cov kua condensed. Hom wick uas muaj xws li:
| Wick Hom | Pore Radius | Permeability | Qhov zoo tshaj plaws Orientation |
|---|---|---|---|
| Grooved | Loj | Siab | Kab rov tav lossis lub ntiajteb txawj nqus- pab |
| Screen Mesh | Nruab nrab | Nruab nrab | Nruab nrab orientation yooj |
| Sintered hmoov | Me me | Tsawg | Ib qho kev taw qhia (nrog rau kev tiv thaiv-lub ntiajteb txawj nqus) |
| Composite | Hloov pauv | Hloov pauv |
Kev siv hybrid |
Sintered tube
Hmoov sintering + ntiav groove
3. Cov kua dej ua haujlwm
Cov kua dej yog xaiv raws li kev khiav hauj lwm qhov kub thiab txias:
| Kua dej | Qhov kub thiab txias | Tej kev siv |
|---|---|---|
| Dej | 30-200 degree | Feem ntau cov tshuab hluav taws xob cua txias |
| Ammonia | -60-100 degree | Spacecraft thermal tswj |
| Methanol | 10-130 degree | Tsawg-kub hluav taws xob |
| Acetone | 0-120 degree | Cov khoom siv hluav taws xob |
| Sodium | 600-1100 degree | High -kub industrial |
Heat Pipe Heat Sink: Ua kom tiav
A cua sov yeeb nkab cua sov dab dejintegrates ib los yog ntau tshaj cov kav dej kub rau hauv cov qauv finned (feem ntau yog txhuas lossis tooj liab) los tsim kom muaj kev ua kom txias txias. Cov kav dej kub ua haujlwm zoo li super-cov thermal conductors, txav cov cua kub sai sai ntawm lub hauv paus mus rau fins, qhov twg nws yog dissipated los ntawm convection (nrog lossis tsis muaj kiv cua).
Kev tsim khoom
Kub Pipe Fabrication: Lub raj muaj dej ua haujlwm, tshem tawm, thiab kaw.
Fin Attachment: Fins yog txuas rau cov kav dej kub siv txoj hauv kev xws li:
Soldering/Brazing: Muab cov hlau nplaum muaj zog nrog cov thermal tsis kam
Zipper Fins (Skived / Folded): Stamped thiab folded fins zawv zawg hla cov kav dej kom muaj qhov ntom ntom ntom ntom
Embedded/Press Fit: Cov kav dej kub tau nias rau hauv grooved puag phaj
Hom Cov Cuab Yeej Siv Hluav Taws Xob
Ntawm no yog cov hom tseem ceeb ntawm kev tsim cov yeeb nkab cua sov:
1. Sintered Thaum tshav kub kub yeeb nkab
Kev tsim khoom: Copper hmoov yog sintered rau sab hauv phab ntsa
Pom Ntsig: Reflects hmoov particle loj thiab irregularity; qis dua cov hmoov ntom ntom pab tiv thaiv "arch choj" tsim thaum lub sij hawm txhaws
Qhov zoo: Muaj zog capillary quab yuam, ua haujlwm nyob rau hauv ib qho kev taw qhia (nrog rau kev tiv thaiv -lub ntiajteb txawj nqus)
Hom kev siv: CPU txias, siab - hluav taws xob hluav taws xob
2. Grooved Thaum tshav kub kub yeeb nkab
Kev tsim khoom: Cov grooves ntiav lossis tob yog extruded lossis machined hauv lub raj
Qhov zoo: Siab permeability, tsis kam ua kua dej
Tus naj npawb ntawm cov hniav: D6: 80-100 hniav, D8: 135 hniav
Hom kev siv: Kab rov tav lossis lub ntiajteb txawj nqus-cov ntawv thov
3. Composite Heat Pipe (Sintered + Grooved)
Kev tsim khoom: Muab cov grooves rau cov kua ntws nrog sintered txheej rau ntxiv capillary quab yuam
Qhov zoo: Siab dua Q-max tshaj cov kav dej ntshiab sintered, zoo heev los tiv thaiv-gravity kev ua tau zoo
Tsim kev xav: Thaum cov hmoov nplej ib nrab- puv, qhov ntsuas lub kaum sab xis tsis zoo yuav tsum tau saib xyuas tshwj xeeb
Hom kev siv: Kev thov cov ntawv thov uas xav tau ob qho tib si kab rov tav thiab tiv thaiv- kev ua haujlwm nrawm
4. Thin/Slexible Heat Pipe
Txoj Cai Ua Haujlwm: Thaum tshav kub kub nkag ntawm ntu evaporation, cov kua ua haujlwm vaporizes thiab nkag mus rau hauv cov kav dej, ces condenses thiab rov qab los ntawm capillary quab yuam
Tswj Parameters:
Particle loj faib: Coarser hmoov=siab dua porosity, dua permeability
Central qws loj: cuam tshuam sintered txheej thickness thiab chav channel loj
Hmoov filling ceev: Muaj feem xyuam rau filling tshuab vibration zaus
Sintering kub: 900 ~ 1030℃rau kwv yees li 9 teev
Vapor Chamber vs Heat Pipe: Uas Zoo dua?
Ib qho lus nug hauv kev tswj xyuas thermal yogvapor chavvs cev-Koj yuav tsum xaiv lub tshuab twg? Ob leeg ua haujlwm ntawm tib theem- hloov txoj cai, tab sis lawv txawv hauv geometry thiab daim ntawv thov.
Qhov txawv tseem ceeb
| Feature | Lub raj cua sov | Vapor Chamber |
|---|---|---|
| Thaum tshav kub kub kis | Linear (nrog cov yeeb nkab axis) | 2D planar faib |
| Thickness Profile | 3-6 hli typical | Raws li nyias li 0.3mm |
| Teb rau Hotspots | Nruab nrab- nyob ntawm qhov chaw tso cov yeeb nkab | Zoo heev - tam sim ntawd diffusion |
| Nqi | Tsawg (mature manufacturing) | Siab dua (precision sealing yuav tsum tau) |
| Qhov zoo tshaj plaws siv Case | Laptops, desktops, cov khoom siv loj dua | Smartphones, ultrabooks, nyias li |
vapor chav
Kev sib piv
Vapor Chambers feem ntau muaj20-30% thermal conductivity zoo duatshaj qhov sib npaug ntawm cov yeeb nkab cua sov teeb hauv qhov chaw txwv. Txawm li cas los xij, cov kav dej kub ua tau zoo thaum koj xav tau txav cov cua sov mus ntev dua (piv txwv li, los ntawm GPU ze ntawm lub motherboard ntug mus rau sab nraub qaum).
Thaum Xaiv Txhua
Xaiv cov kav dej kub thaum :
You need to transport heat over distances >100 hli
Nws muaj chav rau cov fins loj dua thiab ntau tus kiv cua
Kev tswj tus nqi yog qhov tseem ceeb
Cov cuab yeej yuav muaj kev ntxhov siab rau lub cev (cov kav dej kub yog cov neeg kho tshuab ntau dua)
Xaiv vapor Chambers thaum :
Qhov chaw tsis tshua muaj kev txwv (cov khoom siv nyias)
Koj yuav tsum tau kis cov cua sov tshaj qhov chaw loj sai sai
Koj tab tom cuam tshuam nrog cov kub kub flux ntom ntom hotspots
Daim ntawv thov tuaj yeem pom tseeb tus nqi siab dua
Heat Pipe Performance Parameters thiab Kev Ntsuas
Txhawm rau kom ua tau zoo, cov kav dej kub tau raug kuaj xyuas nruj:
1. Kev txwv kev thauj mus los kub
Muaj tsib qhov kev txwv kev thauj mus los ntawm cov cua sov uas txiav txim siab qhov siab tshaj plaws ntawm cov kav dej kub:
| txwv | Kev piav qhia | Ua rau |
|---|---|---|
| Ntsig | viscous rog tiv thaiv vapor ntws | Ua haujlwm hauv qab qhov ntsuas kub tau pom zoo |
| Sonic | Vapor mus txog sonic tshaj tawm ntawm evaporator tawm | Lub zog ntau dhau ntawm kev ua haujlwm qis |
| Kev nkag | High -Veocity vapor tiv thaiv condensate rov qab | Kev khiav hauj lwm saum lub zog tsim tawm tswv yim |
| Capillary | Lub siab poob siab tshaj lub taub hau capillary | Input zog tshaj qhov tsim muaj peev xwm |
| Boiling | Film boiling nyob rau hauv evaporator | High radial kub flux |
Covcapillary txwvfeem ntau yog qhov txwv tsis pub muaj nyob rau hauv cov yeeb nkab cua sov tsim, thiab nws muaj zog cuam tshuam los ntawm kev khiav hauj lwm orientation thiab wick qauv.
2. Delta T (ΔT) Test
Ntsuas qhov kub sib txawv ntawm cov evaporator thiab condenser kawg. Ib qho me me ΔT qhia tau zoo dua isothermal kev ua haujlwm. Kev lag luam tus qauv:100% kev soj ntsuam nrog ΔT Tsawg dua lossis sib npaug li 5 degree.
3. Q-max Test
Txiav txim qhovMaximum thauj khoom muaj peev xwm(hauv watts) ua ntej lub wick dries tawm. Qhov no nyob ntawm cov qauv wick, kua dej, thiab kev taw qhia.
4. Kev kuaj kev nyab xeeb / tawg
Cov kav dej kub yog cov hlab ntsha uas tau sim los tiv thaiv qhov kub thiab txias yam tsis muaj dej. HomKev kub ceev: 320 degreerau to.
5. Thermal Resistance xam xam
Rau tooj liab / dej kub yeeb nkab nrog hmoov hlau wick, kwv yees cov txheej txheem thermal kuj:
Evaporator / Condenser: 0.2℃/ W / cm² (raws li thaj chaw sab nrauv)
Axial: 0.02℃/ W / cm² (raws li vapor chaw hla - cheeb tsam ntu)
Piv txwv li: Rau 1.27cm txoj kab uas hla, 30.5cm ntev cua sov yeeb nkab dissipating 75W nrog 5cm evaporator thiab condenser lengths, tus xam ΔT ≈ 3.4℃.
Qhov zoo ntawm Cov Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob
Ultra{0}}High Thermal Conductivity: Hloov cov cua sov 100-1000 npaug zoo dua li cov tooj liab
Isothermal kev ua haujlwm: Kub sib txawv ntawm evaporator thiab condenser me me heev
Lub teeb thiab compact: Pab kom slim tsim rau niaj hnub electronics
Tsis muaj qhov txav chaw: Ua haujlwm ntsiag to thiab kev ntseeg siab
Kev khiav hauj lwm dav: Los ntawm cryogenic ({1}}243 degree) mus rau high-temperature (1000 degree) daim ntawv thov
Kev ua haujlwm Passive: Tsis xav tau lub zog sab nraud
Cov Khoom Siv: Brass vs. Purple Copper
Kev nkag siab txog qhov sib txawv ntawm cov khoom yog qhov tseem ceeb rau kev tsim cov dab dej kub:
Ntshav Copper (C1100)
Purity: >99.9% tooj liab
Thermal conductivity: Zoo heev
Daim ntawv thov: Cov kav dej kub, dej txias phaj pipelines
Yam ntxwv: Zoo dua conductivity thiab thermal hloov dua li tooj dag
Brass (Copper-Zinc Alloy)
Kev sib xyaw: Copper + zinc (tooj liab feem ntau 60-80%)
Cov khoom: Siab hardness, zoo ductility, zoo corrosion kuj
Daim ntawv thov: Cov khoom sib xyaw ua ke, dej txias phaj sib koom ua ke
Yam ntxwv: Zoo oxidation tsis kam, qis thermal conductivity tshaj tooj liab ntshiab
Embedded Copper Tube Txias Phaj
Muab ob qho tib si cov ntaub ntawv los txhawb lawv cov txiaj ntsig: ntshav tooj liab rau kev kub ceev ceev, tooj dag rau kev tiv thaiv corrosion thiab kev ruaj ntseg.
Tsim Kev Txiav Txim Siab thiab Kev Xaiv Phau Ntawv Qhia
Kauj Ruam 1: Txhais cov kev xav tau
Thaum tshav kub kub Load (Q): Muaj pes tsawg watts yuav tsum tau dissipated?
Qhov siab tshaj qhov ntsuas kub: Tkev sib tshuamlos yog Tcas
Cov xwm txheej puag ncig: Airflow, kub, qhov chaw txwv
Kev taw qhia: Puas yuav cov kav dej kub ua haujlwm horizontally, vertically, lossis tiv thaiv lub ntiajteb txawj nqus?
Kauj ruam 2: Xaiv hom Wick Raws li Kev Taw Qhia
| Kev taw qhia | Pom zoo Wick | Yog vim li cas |
|---|---|---|
| Lub ntiajteb txawj nqus-pab (condenser saum evaporator) | Grooved los yog mesh | Loj pore radius, siab permeability |
| Kab rov tav | Sintered los yog composite | Balanced capillary quab yuam |
| Anti-lub ntiajteb txawj nqus (evaporator saum condenser) | Sintered nkaus xwb | Me me pore radius, muaj zog capillary quab yuam |
Kauj Ruam 3: Txheeb xyuas cov yeeb nkab cua sov thiab qhov ntau
Txoj kab uas hlaQhov ntau thiab tsawg: 4mm, 6mm, 8mm. Cov kab loj dua thauj cov cua sov dua tab sis xav tau qhov chaw ntau dua
Cov kav dej: Ntau cov kav dej kub siv nyob rau hauv parallel kom kis tau cov cua sov thiab txo cov thermal tsis kam
Kauj ruam 4: Fin Design
Khoom siv Fin: Aluminium (lub teeb yuag, nqi-zoo) lossis tooj liab (siab dua conductivity)
Fin ntom: Ntau cov fins nce thaj tsam saum npoo tab sis tuaj yeem txwv tsis pub muaj cua nkag
Txoj kev txuas: Soldered pob qij txha muab kev ua haujlwm zoo tshaj plaws thermal
Daim ntawv thov thoob plaws kev lag luam
Cov kav dej kub cua sov yog siv rau ntau hom kev siv:
| Daim ntawv thov cheeb tsam | Piv txwv |
|---|---|
| Fais fab Electronics | Inverters, IGBTs, thyristors, UPS systems |
| Kev suav | CPUs, GPUs, servers, siab -kawg laptops |
| Kev sib txuas lus | Cov chaw nres tsheb hauv paus, khoom siv sib txuas lus |
| LED Teeb pom kev zoo | COB LEDs, siab -brightness modules |
| Lub zog tauj dua tshiab | Cua fais fab converters, hnub ci inverter |
| Khoom siv kho mob | Lasers, imaging devices |
| Kev lag luam | Lub cev muaj zog tsav, vuam khoom siv |
| Aerospace | Satellite thermal tswj |
Cov lus nug nquag
Q: Puas yog cov kav dej kub puas tau xau lossis tsis?
High - cov kav dej kub zoo tau kaw thiab sim rau qhov kev ua haujlwm siab ntev. Lawv muaj lub neej ntev heev tab sis tuaj yeem ua tsis tau yog tias punctured lossis ua haujlwm dhau Q-max txwv.
Q: Cov kav dej kub puas tuaj yeem khoov?
Yog lawm, tab sis yuav tsum tau ceev faj khoov kom tsis txhob kinking uas txwv cov vapor ntws. Yuav tsum tau ua raws li cov lus qhia tsawg kawg ntawm qhov nkhaus.
Q: Kuv yuav xam pes tsawg cov kav dej kub uas kuv xav tau?
Qhov no nyob ntawm tag nrho cov cua sov load thiab txhua lub yeeb nkab Q-max. Thermal simulation (CFD) raug pom zoo rau cov qauv tsim.
Q: Puas yog lub dab da dej dub zoo dua?
Tsis yog-thaum cov npoo dub tawg me ntsis zoo dua, convection yog qhov tseem ceeb ntawm kev ua kom txias txias rau finned cua sov dab dej. Xim muaj qhov cuam tshuam tsis zoo rau kev ua haujlwm.
Q: Vim li cas ho tsis ua tag nrho cov heatsink los ntawm tooj liab?
Tooj yog hnyav, kim, thiab nyuaj rau tshuab. Kev sib xyaw ua ke ntawm cov kav dej kub kub nrog aluminium fins muaj qhov sib npaug zoo ntawm kev ua tau zoo, qhov hnyav, thiab tus nqi.
Q: Dab tsi yog qhov txawv ntawm cov kav dej kub thiab cov vapor chamber?
Cov kav dej kub hloov cov cua sov linearly (1D), thaum vapor chambers kis cua sov hla ib qho chaw (2D). Vapor Chambers yog qhov zoo dua rau cov khoom siv nyias nyias nrog cov cua kub kub ceev.
Q: Cov kav dej kub puas tuaj yeem ua haujlwm hauv ib qho kev taw qhia?
Sintered wick cua sov kav ua haujlwm nyob rau hauv ib qho kev taw qhia vim muaj zog capillary rog. Grooved wick cua sov kav yuav tsum tau kev pab lub ntiajteb txawj nqus.
Xaus
Cov kav dej kub cua sov yog qhov tseem ceeb rau cov khoom siv hluav taws xob niaj hnub siab -. Los ntawm leveraging theem-hloov thev naus laus zis, lawv xa cov kev ua haujlwm thermal tshwj xeeb hauv cov pob khoom sib txuam, txhim khu kev qha. Txawm hais tias koj xav tau tus qauv tsim lossis kev daws teeb meem, nkag siab txog cov hauv paus ntsiab lus -wick hom, cov ntaub ntawv, kev sim, thiab kev xaiv cov qauv- yuav pab koj ua kom txias txias.
Rau cov ntawv thov uas xav tau ultra- nyias profiles los yog tuav cov cua kub flux ceev,vapor chamber txiastej zaum yuav yog qhov kev xaiv zoo tshaj. Txawm li cas los xij, rau feem ntau cov khoom siv hluav taws xob cua txias uas xav tau kev thauj mus los ntawm kev kub ceev,cua sov yeeb nkab cua sov dab dejnyob twj ywm tus nqi tshaj - zoo thiab txhim khu kev qha.
Npaj los tham txog koj qhov project? Tiv tauj peb kom muaj kev sib tham thermal dawb lossis thov kev tsocai. Peb cov engineers nyob ntawm no los pab koj nrhiav kev ua kom txias txias zoo meej.
