Theem hloov pauv (PCMs) tau siv feem ntau vim tias lawv muab cov kev daws teeb meem thiab cov kev tiv thaiv kom sov, thiab kev tiv thaiv qhov kub. Hauv qab no yog cov lus qhia ntxaws ntxaws ntawm cov laj thawj tseem ceeb rau kev siv theem hloov pauv:
1. Txuag hluav taws xob
Theem Hloov Hloov Hloov tuaj yeem nqus lossis tso tawm ntau qhov kev siv hluav taws xob ntau thaum lub sijhawm hloov cov txheej txheem. Cov xeeb ceem no ua rau lawv muaj zog thermal zog cia xov yog. Piv txwv li, thaum muaj hnub ci txaus thaum nruab hnub, theem hloov cov khoom siv tuaj yeem nqus thiab khaws cov cua sov; Thaum tsaus ntuj lossis hauv huab cua txias, cov ntaub ntawv tuaj yeem tso tawm lub zog thaum tshav kub kub kom tswj tau qhov chaw sov.
2. Muaj zog tswj tau
Ntawm theem hloov chaw, theem hloov pauv cov khoom tuaj yeem nqus lossis tso tawm thaum tshav kub yuav luag txhua qhov kub. Qhov no ua rau pcms heev haum rau cov ntawv thov uas yuav tsum tau kho qhov ntsuas cua txias, thiab cov kev tswj hluav taws xob ntsuas hluav taws xob, thiab cov kev tswj hluav taws xob ntsuas hluav taws xob hauv tsev. Hauv cov ntawv thov no, theem hloov pauv cov ntaub ntawv pab txo cov kev siv hluav taws xob thiab txhim kho txhua yam kev ua haujlwm.
3. Txhim kho kev txuag hluav taws xob thiab txo kev siv hluav taws xob
Hauv kev ua liaj ua teb architecture, kev kawm theem hloov pauv rau hauv tsev qauv qauv muaj peev xwm txhim kho kev txuag hluav taws xob. Cov ntaub ntawv no tuaj yeem nqus tau cov cua sov ntau dua thaum nruab hnub, txo lub nra rau ntawm cov cua txias; Thaum tsaus ntuj, nws tso tawm thaum tshav kub kub thiab txo cov kev thov cua sov. Lub ntuj no thermal kev cai ua haujlwm txo cov kev cia siab rau cov khoom siv cua sov thiab cua txias, yog li txo hluav taws xob kev siv hluav taws xob.
4. Ib puag ncig tus phooj ywg
Theem Hloov Cov Khoom Siv yog suav nrog cov organic cov ntaub ntawv lossis inorganic ntsev, feem ntau ntawm cov uas ib puag ncig ib puag ncig thiab rov ua dua tshiab. Kev siv pcms pcms tuaj yeem pab txo cov roj av pa hluav taws xob thiab cov khoom siv roj av, ua rau muaj kev tiv thaiv ib puag ncig thiab ua tiav cov hom phiaj txhim kho kom ruaj khov.
5. Txhim kho cov khoom lag luam thiab kev nplij siab
Kev siv theem hloov pauv hauv cov neeg siv khoom xws li cov khaub ncaws, kab txaj, lossis rooj tog zaum tuaj yeem muab kev nplij siab ntxiv. Piv txwv li, siv PCMS hauv cov khaub ncaws tuaj yeem tswj qhov kub raws li kev hloov pauv hauv lub cev kub, tswj qhov kub thiab txias rau tus hnav. Siv nws nyob hauv daim txaj pw yuav muab kev pw ntawm qhov kub thiab txias dua thaum hmo ntuj.
6. Yooj thiab yoog tau
Theem Hloov Hloov Cov Khoom Siv tuaj yeem tsim tau rau ntau qhov qauv thiab ntau thiab tsawg kom tau raws li ntau yam kev cai thov. Lawv tuaj yeem ua rau hauv cov lus, cov yeeb yaj kiab, lossis ua ke rau lwm cov ntaub ntawv xws li pob zeb ua vaj tse lossis yas ua kom siv tau.
7. Txhim Kho Kev Lag Luam Nyiaj Txiag
Txawm hais tias thawj zaug kev nqis peev hauv theem hloov pauv yuav siab, lawv cov txiaj ntsig ntev hauv kev txhim kho cov nqi zog yog qhov tseem ceeb. Los ntawm kev txo cov neeg sib zog ntawm cov khoom siv hluav taws xob, theem hloov pauv cov khoom tuaj yeem pab txo cov nqi hluav taws xob thiab muab cov nyiaj txiag rov qab los.
Hauv cov ntsiab lus xaus, kev siv theem hloov pauv tuaj yeem muab cov kev tswj cov kev tswj cov cua sov, txhim kho cov khoom ua haujlwm thiab kev nplij siab, thiab pab txhawb kev txhim kho kom ruaj khov
Ob peb cov kev kawm ntau thiab lawv cov yam ntxwv ntawm theem hloov pauv
THEEM HLOOV COV NTAUB NTAWV (PCMS) tuaj yeem faib ua ob peb pawg raws li lawv cov yam ntxwv hloov pauv, txhua tus nrog kev thov tshwj xeeb thiab kev txwv. Cov ntaub ntawv no feem ntau suav nrog cov organic pcms, inorganic PCMS, Bio raws PCMS, thiab PCMs). Hauv qab no yog cov lus qhia ntxaws ntxaws rau cov yam ntxwv ntawm txhua hom theem hloov pauv khoom:
1. Organic theem hloov cov ntaub ntawv
Organic theem hloov cov khoom siv tsuas yog muaj ob hom: paffin thiab fatty acids.
-Qhov:
-Features: Kev siv tshuaj xyuas siab ruaj khov, zoo rov qab, thiab kev hloov kho yooj yim, thiab kho tau yooj yim ntawm melting taw tes los ntawm kev hloov ntev ntawm molecular chains.
-Disadvantage: Lub thermal conductivity yog tsawg, thiab nws yuav tsim nyog ntxiv thermal cov ntaub ntawv kho kom ceev.
-Fatty acids:
-Fe tech: nws muaj cov cua sov siab dua li paraffin thiab qhov pom kev zoo meltings, haum rau ntau yam kev xav tau.
-DisAdvantages: qee cov fatty acids yuav yauv kis ntu thiab tseem kim dua li paraffin.
2. Inorganic theem hloov pauv
Inorganic theem hloov pauv cov ntaub ntawv muaj xws li cov ntsev ua kom haum thiab cov hlau hlau.
-Sws dej daws:
-Features: Zoo thermal stability, siab tratent tshav kub, thiab nqi tsawg.
-Disadvantages: thaum khov, Delamination yuav tshwm sim thiab nws yog corrosive, uas yuav tsum tau cov ntaub ntawv ntim ntim.
-Metal salts:
-Qhov kev hloov pauv: theem theem kev hloov ntsuas kub, haum rau kev kub-kub thermal zog cia.
-DisAdvantages: kuj tseem muaj teeb meem corrosion thiab kev ua tau zoo yuav tshwm sim vim rov ua dua melting thiab solidification.
3. Biobased theem hloov cov ntaub ntawv
Cov theem them biobased hloov pauv yog cov qauv hloov kho los ntawm xwm lossis synthesized los ntawm biotechnology.
-Features:
-Txhais kev phooj ywg, biodegradable, pub dawb ntawm cov tshuaj muaj teeb meem, tau raws li cov kev xav tau ntawm kev txhim kho kom ruaj khov.
-Nws tuaj yeem muab rho tawm los ntawm cov nroj tsuag lossis tsiaj raw cov ntaub ntawv, xws li roj zaub thiab roj.
-DisAdvantages:
-Qhov kev cuam tshuam nrog cov nqi siab thiab qhov chaw txwv.
-Tus thermal stability thiab thermal conductivity yog qis dua li cov pcms qub, thiab yuav xav tau kev txhawb nqa lossis sau cov khoom siv lossis cov khoom siv hloov chaw.
4. Composite theem hloov pauv
Composite theem hloov cov ntaub ntawv ua ke pcms nrog lwm cov ntaub ntawv (xws li cov ntaub ntawv thermal, cov ntaub ntawv txhawb nqa, thiab lwm yam ntawm cov pcms uas muaj sia nyob.
-Features:
-Yog ua ke nrog siab thermal colority cov ntaub ntawv, cov cua sov teb ceev thiab thermal ruaj khov yuav ua tau zoo heev.
-Cov neeg tuaj yeem ua kom tau raws li cov ntawv thov uas yuav tsum tau ua, xws li txhim kho cov neeg kho tshuab zog lossis txhim kho thermal stability.
-DisAdvantages:
-Cov kev npaj cov txheej txheem yuav ua rau muaj kev yooj yim thiab kim.
-Txoj kev sib txuam nrog cov khoom siv thiab kev ua haujlwm yuav tsum tau ua.
Cov theem hloov pauv txhua tus muaj lawv cov txiaj ntsig tshwj xeeb thiab kev xaiv cov xwm txheej. Cov kev xaiv ntawm cov hom PCM tsim nyog feem ntau yog nyob ntawm cov ntawv thov tshwjxeeb, kev siv nyiaj ib puag ncig, ib puag ncig cov kev xav txog lub neej. Nrog rau qhov tob ntawm kev tshawb fawb thiab kev txhim kho thev naus laus zis, kev txhim kho ntawm theem hloov pauv
Daim ntawv thov tau txais kev cia siab ntxiv nthuav dav ntxiv, tshwj xeeb tshaj yog nyob rau hauv kev tswj hwm hluav taws xob thiab kev tswj kub kub.
Dab tsi yog qhov sib txawv ntawm cov egecic theem hloov pauv thiab infinite theem hloov pauv hloov?
Orghasic theem hloov cov ntaub ntawv, PCMS thiab inorganic theem hloov pauv thiab kev tswj hwm qhov kub thiab tso tawm thaum tshav kub kub los ntawm cov khoom siv thaum tshav ntuj. Ob yam ntaub ntawv no txhua tus muaj lawv tus cwj pwm thiab cov chaw thov, thiab cov hauv qab no yog qee qhov sib txawv ntawm lawv:
1. Tshuaj lom neeg:
-Organic theem hloov pauv khoom: Feem ntau yog suav nrog cov kua ntses thiab cov rog. Cov ntaub ntawv no feem ntau muaj cov tshuaj ruaj khov zoo thiab yuav tsis decompose thaum lub sijhawm melting thiab solorification cov txheej txheem.
-Cov theem hloov pauv hloov chaw: suav nrog cov kev daws teeb meem saline, hlau, thiab ntsev. Cov khoom siv no muaj ntau yam ntawm cov ntsiab lus melting, thiab ib qho kev qhia melting tsim nyog tuaj yeem xaiv raws li kev xav tau.
2. Thermal Performance:
-Organic theem hloov pauv: feem ntau muaj qis dua thermal conductivity, tab sis kev sib tw, lub meej mom uas lawv tuaj yeem nqus tau lossis tso tawm ntau ntawm cov cua sov.
-Yog theem hloov pauv hloov chaw: hauv kev sib piv, cov ntaub ntawv no feem ntau hloov cua sov dua, tab sis lawv cov khoom siv lob tsis qis dua cov khoom siv organic.
3. Kev voj voog stability:
-Organic theem hloov pauv: muaj kev ua kom zoo nkauj ruaj khov thiab tuaj yeem tiv taus ntau cov txheej txheem melting thiab cov txheej txheem uas tsis muaj kev ua haujlwm tseem ceeb lossis hloov pauv hauv kev ua tau zoo.
-Cov theem hloov pauv hloov chaw: tuaj yeem ua rau qee qhov kev ntxhov siab lossis kev ua tau zoo tom qab siv ntau yam khoom siv uas tau siv rau crystallization.
4. Nqi thiab muaj:
-Organic theem hloov pauv hloov: lawv feem ntau kim, tab sis vim lawv cov nqi ruaj khov thiab siv tau, lawv cov nqi siv ntev yuav yog tsawg.
-Cov theem hloov pauv: Cov ntaub ntawv no feem ntau yog cov nqi qis thiab tsim tau yooj yim rau cov nplai loj, tab sis yuav xav tau kev hloov ntau zaus lossis kev saib xyuas.
5. Daim Ntawv Thov:
-Organic theem hloov pauv hloov: vim lawv cov tshuaj lom neeg ruaj khov thiab cov tshuaj zoo, lawv feem ntau siv hauv cov tsev, khaub ncaws, thiab lwm thaj chaw.
-Cov theem hloov pauv: feem ntau siv nyob rau hauv kev siv hluav taws xob xws li cov hluav taws xob rov qab los thiab cov khoom siv kub ua haujlwm zoo nkauj thiab melting point.
Hauv cov ntsiab lus xaus, thaum xaiv cov khoom hloov organic lossis inorganic theem hloov pauv, yam xws li kev thov siv hluav taws xob tshwj xeeb, thiab xav tias thermal kev ua tau xav tau. Txhua cov ntaub ntawv muaj nws cov txiaj ntsig tshwj xeeb thiab cov kev txwv thiab kev txwv, haum rau kev thov sib txawv.
Lub Sijhawm Post: Lub Tsib Hlis-28-2024