Phase Change Materials, PCMs yog ib yam khoom tshwj xeeb uas tuaj yeem nqus lossis tso tawm ntau lub zog thermal ntawm qhov kub thiab txias, thaum hloov pauv hauv lub xeev ntawm cov teeb meem, xws li kev hloov ntawm cov khoom mus rau cov kua lossis lwm yam.Cov cuab yeej no ua rau cov ntaub ntawv hloov pauv muaj nuj nqis tseem ceeb hauv kev tswj qhov kub thiab txias, lub zog cia, thiab thermal tswj teb.Cov hauv qab no yog cov ncauj lus kom ntxaws ntawm cov ntaub ntawv hloov pauv theem:
khoom ntiag tug
Cov yam ntxwv tseem ceeb ntawm theem hloov cov ntaub ntawv yog lub peev xwm nqus los yog tso tawm ntau ntawm cov cua sov latent ntawm qhov kub thiab txias (theem hloov kub).Hauv cov txheej txheem ntawm kev nqus cua sov, cov ntaub ntawv hloov pauv ntawm ib theem mus rau lwm qhov, xws li los ntawm cov khoom mus rau cov kua (melting).Thaum lub sij hawm exothermic txheej txheem, cov khoom hloov los ntawm cov kua rau cov khoom (solidification).Cov txheej txheem hloov pauv theem no feem ntau tshwm sim nyob rau hauv qhov ntsuas qhov nqaim heev, tso cai rau theem hloov cov ntaub ntawv kom muaj qhov zoo thermal stability ntawm yuav luag qhov kub thiab txias.
Hom loj
Cov ntaub ntawv hloov pauv theem tuaj yeem muab faib ua pawg hauv qab no raws li lawv cov khoom siv tshuaj lom neeg thiab daim ntawv thov teb:
1. Organic PCMs: suav nrog paraffin thiab fatty acids.Cov ntaub ntawv no muaj cov tshuaj lom neeg ruaj khov zoo, rov siv tau dua, thiab muaj qhov tsim nyog ntawm theem hloov pauv kub.
2. Inorganic PCMs: suav nrog cov tshuaj ntsev thiab cov tshuaj hlau.Lawv cov thermal conductivity feem ntau zoo dua li cov organic PCMs, tab sis lawv yuav ntsib kev sib cais thiab teeb meem corrosion.
3. Biobased PCMs: Nov yog hom PCMs uas tshwm sim los ntawm cov khoom siv biomaterials thiab muaj cov yam ntxwv ntawm ib puag ncig thiab ruaj khov.
daim ntawv thov cheeb tsam
Cov ntaub ntawv hloov pauv tau siv dav hauv ntau qhov chaw, feem ntau suav nrog:
1. Kev siv hluav taws xob hauv tsev: Los ntawm kev sib koom ua ke PCMs rau hauv cov khoom siv hauv tsev xws li phab ntsa, pem teb, lossis qab nthab, qhov kub thiab txias hauv tsev tuaj yeem tswj tau zoo, txo qis kev siv hluav taws xob rau cua txias thiab cua sov.
2. Thermal zog cia: PCMs tuaj yeem nqus cov cua sov ntawm qhov kub thiab tso cua sov ntawm qhov kub thiab txias, pab kom sib npaug ntawm cov khoom siv hluav taws xob thiab kev xav tau, tshwj xeeb tshaj yog nyob rau hauv kev siv lub zog tauj dua tshiab xws li hnub ci thiab cua zog.
3. Kev tswj cua sov ntawm cov khoom siv hluav taws xob: Kev siv PCMs hauv cov khoom siv hluav taws xob tuaj yeem pab tswj cov cua sov thaum lub sijhawm ua haujlwm, txhim kho kev ua haujlwm, thiab ua kom ntev lub neej ntawm cov cuab yeej.
4. Kev thauj mus los thiab ntim khoom: Kev siv PCMs hauv kev thauj khoom noj thiab tshuaj tuaj yeem tswj xyuas cov khoom raws li qhov kub thiab txias thiab xyuas kom cov khoom zoo.
Kev sib tw
Txawm hais tias muaj txiaj ntsig zoo ntawm cov ntaub ntawv hloov pauv theem, lawv tseem ntsib qee qhov kev sib tw hauv kev siv tswv yim, xws li lifespan, thermal stability, thiab xav tau kev ntim khoom thiab kev koom ua ke thev naus laus zis.Cov kev cov nyom no yuav tsum tau kov yeej los ntawm kev nce qib hauv cov ntaub ntawv science thiab engineering technology.
Cov ntaub ntawv hloov pauv tau cia siab rau hauv thaj chaw ntawm lub zog ntsuab thiab cov thev naus laus zis kom ruaj khov vim lawv qhov kev ua haujlwm thermal tshwj xeeb thiab kev cia siab rau daim ntawv thov dav.
Kev Txhim Kho Yav Tom Ntej ntawm PCMs
Daim ntawv thov ntawm cov ntaub ntawv hloov pauv theem (PCMs) hauv ntau qhov kev lag luam qhia tias lawv muaj peev xwm dav thiab pom meej qhov kev loj hlob yav tom ntej.Cov ntaub ntawv no muaj nuj nqis heev rau lawv lub peev xwm nqus thiab tso tawm ntau cov cua sov thaum lub sijhawm hloov pauv.Cov hauv qab no yog ob peb qhov tseem ceeb thiab kev cia siab rau yav tom ntej ntawm kev txhim kho cov ntaub ntawv hloov pauv theem:
1. Zog efficiency thiab architecture
Hauv thaj chaw ntawm architecture, PCMs tuaj yeem siv los ua ib feem ntawm kev tswj xyuas qhov kub thiab txias kom txo tau kev cia siab rau cov cua sov thiab cua txias.Los ntawm kev sib koom ua ke PCMs rau hauv cov khoom siv hauv tsev xws li phab ntsa, ru tsev, pem teb, lossis qhov rais, thermal efficiency ntawm lub tsev tuaj yeem txhim kho tau zoo, kev siv hluav taws xob tuaj yeem txo, thiab cov pa hluav taws xob hauv tsev yuav raug txo.Nyob rau hauv lub neej yav tom ntej, nrog rau kev txhim kho cov ntaub ntawv hloov pauv theem tshiab thiab ua tau zoo thiab txo cov nqi, daim ntawv thov no yuav dhau los ua ntau dua.
2. Cov tshuab hluav taws xob tauj dua tshiab
Hauv cov tshuab hluav taws xob tauj dua tshiab xws li hnub ci thiab cua zog, PCMs tuaj yeem ua lub zog cia khoom kom sib npaug ntawm cov khoom siv thiab kev thov.Piv txwv li, lub zog hluav taws xob uas tsim los ntawm lub hnub ci hluav taws xob txuag hluav taws xob thaum nruab hnub tuaj yeem khaws cia hauv PCMs thiab tso tawm thaum hmo ntuj lossis thaum lub sijhawm xav tau siab tshaj.Qhov no yuav pab txhim kho kev siv hluav taws xob kom zoo thiab ua kom lub zog txuas ntxiv mus.
3. Kev tswj kub ntawm cov khoom siv hluav taws xob
Raws li cov khoom siv hluav taws xob tau dhau los ua qhov me me thiab ua haujlwm siab, cov cua kub dissipation tau dhau los ua qhov nyuaj.PCMs tuaj yeem siv rau hauv cov khoom siv hluav taws xob xws li khoos phis tawj processors thiab cov khoom siv txawb los pab tswj cov thermal loads, txuas ntxiv lub neej ntawm cov cuab yeej, thiab txhim kho kev ua haujlwm.
4. Textiles thiab khaub ncaws
Daim ntawv thov ntawm PCMs hauv textiles kuj qhia tau tias muaj peev xwm nthuav dav.PCMs ua ke rau hauv cov khaub ncaws tuaj yeem tswj tus neeg hnav lub cev kub, txhim kho kev nplij siab, thiab tiv taus huab cua huab cua.Piv txwv li, cov khaub ncaws ncaws pob thiab cov khoom siv sab nraum zoov tuaj yeem siv cov khoom siv no los tswj lub cev kub thiab txias.
5. Kev kho mob
Hauv kev kho mob, PCMs tuaj yeem siv los tswj qhov kub ntawm cov khoom siv kho mob xws li tshuaj thiab tshuaj tiv thaiv, ua kom lawv ruaj khov thiab ua haujlwm tau zoo thaum thauj thiab khaws cia.Tsis tas li ntawd, PCMs kuj tseem siv rau hauv cov khoom siv kho mob, xws li kev tswj xyuas qhov kub thiab txias rau kev kho lub cev.
6. Kev thauj mus los
Hauv kev thauj mus los ntawm cov khoom noj thiab tshuaj, PCMs tuaj yeem siv los tswj cov khoom nyob rau hauv qhov ntsuas kub uas tsim nyog, tshwj xeeb tshaj yog nyob rau hauv cov xwm txheej uas xav tau cov saw hlau txias.
Cov kev sib tw yav tom ntej thiab cov lus qhia kev txhim kho:
Txawm hais tias PCMs muaj peev xwm loj heev rau daim ntawv thov, lawv tseem ntsib qee qhov teeb meem hauv kev lag luam dav dav, xws li tus nqi, kev ntsuas kev cuam tshuam ib puag ncig, kev ruaj ntseg mus sij hawm ntev, thiab teeb meem kev sib raug zoo.Cov kev tshawb fawb yav tom ntej yuav tsom mus rau kev txhim kho kom muaj txiaj ntsig zoo, ib puag ncig tus phooj ywg, thiab tus nqi-zoo PCMs, nrog rau kev txhim kho kev sib koom ua ke rau cov tshuab uas twb muaj lawm.
Tsis tas li ntawd, nrog rau kev xav tau thoob ntiaj teb ntau ntxiv rau kev txuag hluav taws xob, txo qis emissions, thiab kev txhim kho kom ruaj khov, kev tshawb fawb thiab kev siv cov ntaub ntawv hloov pauv yuav tsum tau txais kev txhawb nqa nyiaj txiag ntau dua thiab kev ua lag luam, txhawb txoj kev loj hlob sai thiab kev tsim kho tshiab ntawm cov cuab yeej cuab tam.
Post lub sij hawm: May-28-2024