Phase Change Materials (PCMs) yog ib yam khoom tshwj xeeb uas tuaj yeem nqus tau lossis tso tawm ntau lub zog thermal ntawm qhov kub thiab txias, thaum hloov pauv hauv lub cev, xws li los 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.
Post lub sij hawm: Jun-20-2024