Cov txheej txheem hloov lub zog los ntawm qhov kub ntawm lub cev mus rau qhov tsis muaj cua sov yog hu ua thermal conduction. Tus lej tus nqi ntawm cov txheej txheem no qhia txog cov thermal conductivity ntawm cov khoom. Lub tswv yim no tseem ceeb heev hauv kev tsim kho thiab kho vaj tse. Cov ntaub ntawv xaiv tau zoo tso cai rau koj los tsim kom muaj lub microclimate zoo hauv chav thiab txuag tau nyiaj ntau ntawm cov cua sov.
Lub tswvyim ntawm thermal conductivity
Thermal conductivity yog cov txheej txheem ntawm thermal zog pauv, uas tshwm sim vim kev sib tsoo ntawm qhov me me ntawm lub cev. Ntxiv mus, cov txheej txheem no yuav tsis tso tseg kom txog thaum lub sijhawm kub sib npaug tuaj. Qhov no yuav siv sij hawm me ntsis. Lub sijhawm siv ntau dua rau kev sib pauv cua sov, qhov thermal conductivity qis dua.
Qhov ntsuas no tau qhia raws li tus coefficient ntawm thermal conductivitycov ntaub ntawv. Lub rooj muaj qhov ntsuas qhov tseem ceeb rau feem ntau cov ntaub ntawv. Kev suav yog ua raws li tus nqi ntawm thermal zog uas tau dhau los ntawm ib qho chaw ntawm cov khoom siv. Qhov loj dua qhov xam tus nqi, qhov khoom nrawm dua yuav muab tag nrho nws cov cua sov.
Yam cuam tshuam rau thermal conductivity
Cov thermal conductivity ntawm cov khoom nyob ntawm ntau yam:
Khoom ntom ntom. Nrog rau qhov nce hauv qhov ntsuas no, kev sib cuam tshuam ntawm cov khoom siv ua kom muaj zog. Raws li, lawv yuav hloov qhov kub thiab txias sai. Qhov no txhais tau hais tias nrog qhov nce ntawm qhov ntom ntawm cov khoom, kev hloov hluav taws xob zoo dua
Qhov porosity ntawm ib yam khoom. Porous cov ntaub ntawv yog heterogeneous nyob rau hauv lawv cov qauv. Muaj cua ntau hauv lawv. Thiab qhov no txhais tau hais tias nws yuav nyuaj rau cov molecules thiab lwm cov khoom kom txav thermal zog. Raws li, thermal conductivity nce
Hummidity kuj cuam tshuam rau thermal conductivity. Cov khoom ntub dej tso cai rau cov cua sov ntau dhau mus. Qee lub rooj txawm qhia txog qhov sib npaug ntawm thermal conductivity ntawm cov khoom hauv peb lub xeev: qhuav, nruab nrab (ib txwm) thiab ntub
Thaum xaiv cov khoom siv rau chav tsev rwb thaiv tsev, nws tseem ceeb heev uas yuav tau xav txog cov xwm txheej uas nws yuav siv.
Lub tswv yim ntawm thermal conductivity hauv kev xyaum
Thermal conductivity yog coj mus rau hauv tus account nyob rau theem ntawm kev tsim lub tsev. Qhov no yuav siv sij hawm mus rau hauv tus account lub peev xwm ntawm cov ntaub ntawv khaws cov cua sov. Ua tsaug rau lawv qhov kev xaiv raug, cov neeg nyob hauv thaj chaw yuav nyob ib puag ncig zoo. Thaum lub sijhawm ua haujlwm, nyiaj rau cua sov yuav txuag tau ntau.
Rwb thaiv tsev ntawm theem tsim yog qhov zoo tshaj plaws, tab sis tsis yog tib txoj kev daws teeb meem. Nws tsis yog qhov nyuaj rau insulate lub tsev uas twb tau ua tiav lawm los ntawm kev ua haujlwm sab hauv lossis sab nraud. Lub thickness ntawm rwb thaiv tsev txheej yuav nyob ntawm seb cov ntaub ntawv xaiv. Qee qhov ntawm lawv (piv txwv li, ntoo, ua npuas ncauj ua npuas ncauj) tuaj yeem siv tau yam tsis muaj txheej txheej thermal rwb thaiv tsev ntxiv. Qhov loj tshaj plaws yog tias lawv cov thickness ntau tshaj 50 centimeters.
Kev saib xyuas tshwj xeeb yuav tsum tau them rau cov rwb thaiv tsev ntawm lub ru tsev, qhov rais thiab qhov rooj qhib, cov plag tsev. Feem ntau ntawm cov cua sov khiav los ntawm cov ntsiab lus no. Visually, qhov no tuaj yeem pom hauv daim duab thaum pib ntawm kab lus.
Cov ntaub ntawv tsim kho thiab lawv cov ntsuas
Rau kev tsim vaj tsev, cov khoom siv nrog cov coefficient tsawg ntawm thermal conductivity yog siv. Qhov nrov tshaj plaws yog:
- pob zeb. Nws thermal conductivity nyob rau hauv 1.29-1.52W / mK. Tus nqi tseeb nyob ntawm qhov sib xws ntawm cov tshuaj. Qhov ntsuas no tseem cuam tshuam los ntawm qhov ntom ntawm cov khoom siv, uas yog 500-2500 kg / m 3. Cov khoom no yog siv rau hauv daim ntawv ntawm mortar rau foundations, nyob rau hauv daim ntawv ntawm blocks - rau kev tsim kho ntawm phab ntsa thiab foundations.
- Cov pob zeb muaj zog uas nws tus nqi thermal conductivity yog 1.68W / mK. Qhov ceev ntawm cov khoom ncav cuag 2400-2500 kg / m 3.
- Ntoo uas tau siv los ua khoom siv txij thaum ub. Nws qhov ceev thiab thermal conductivity, nyob ntawm pob zeb, yog 150-2100 kg/m3 thiab 0.2-0.23W / mK, feem.
Lwm cov khoom siv hauv tsev nrov yog cib. Nyob ntawm seb muaj pes tsawg leeg, nws muaj cov ntsuas hauv qab no:
adobe (ua los ntawm av nplaum): 0.1-0.4 W/mK;
ceramic (hloov tawm): 0.35-0.81W / mK;
silicate (los ntawm cov xuab zeb nrog txiv qaub): 0.82-0.88 W / mK
khoom siv pob zeb nrog kev sib ntxiv ntawm cov ntxeem tau sib xyaw
Lub thermal conductivity ntawm cov khoom tso cai rau koj siv tom kawg rau kev tsim kho ntawm garages, sheds, lub caij ntuj sov tsev, da dej thiab lwm yam kev tsim. Pawg no suav nrog:
- Ua npuas ncauj. Ua los ntawm kev sib ntxiv ntawm foaming agents, vim hais tias nws yog yus muaj los ntawm ib tug ntxeem tau qauv nrog ib tug ceev ntawm 500-1000 kg / m 3. Nyob rau tib lub sijhawm, lub peev xwm hloov cov cua sov yog txiav txim siab los ntawm tus nqi 0.1-0.37W / mK.
nthuav pob zeb, qhov kev ua tau zoo nyob ntawm nws hom. Cov blocks tsis muaj voids thiab qhov. Hollow blocks yog tsim nrog voids sab hauv, uas tsis tshua muaj zog dua qhov kev xaiv thawj zaug. Hauv qhov thib ob, thermal conductivity yuav qis dua. Yog tias peb xav txog cov duab dav dav, ces qhov ceev ntawm cov av nplaum nthuav dav yog 500-1800 kg / m3. Nws qhov taw qhia yog nyob rau hauv thaj tsam ntawm 0.14-0.65W / mK
Aerated qhob, hauv qhov pores ntawm 1-3 yog tsimhli. Cov qauv no txiav txim siab qhov ntom ntawm cov khoom (300-800kg / m 3). Vim li no, tus coefficient nce mus txog 0.1-0.3 W / mK.
ntsuas cov khoom siv thermal rwb thaiv tsev
Coefficient ntawm thermal conductivity ntawm thermal rwb thaiv tsev cov ntaub ntawv, nrov tshaj plaws nyob rau hauv peb lub sij hawm:
- ua npuas ncauj, uas muaj qhov ntom ntawm 15-50kg / m3, nrog thermal conductivity ntawm 0.031-0.033W / mK;
nthuav polystyrene, qhov ntom ntawm uas yog tib yam li cov khoom siv yav dhau los. Tab sis nyob rau tib lub sijhawm, cov coefficient ntawm cov cua kub hloov pauv yog nyob rau theem ntawm 0.029-0.036W / mK;
iav ntaub plaub. Nws yog tus cwj pwm los ntawm tus coefficient sib npaug ntawm 0.038-0.045W / mK;
pob zeb wool 0.035-0.042W/mK
Scoreboard
Rau qhov yooj yim ntawm kev ua haujlwm, coefficient ntawm thermal conductivity ntawm cov khoom feem ntau yog nkag rau hauv lub rooj. Ntxiv rau qhov coefficient nws tus kheej, xws li ntsuas qhov ntsuas ntawm cov av noo, qhov ntom ntom, thiab lwm yam tuaj yeem cuam tshuam rau hauv nws. Cov ntaub ntawv nrog lub siab coefficient ntawm thermal conductivity yog ua ke nyob rau hauv lub rooj nrog cov ntsuas ntawm thermal conductivity tsawg. Ib qho piv txwv ntawm cov lus no yog qhia hauv qab no:
Siv cov thermal conductivity ntawm cov khoom yuav tso cai rau koj los tsim lub tsev xav tau. Qhov tseem ceeb: xaiv cov khoom uas ua tau raws li txhua qhov tsim nyog. Ces lub tsev yuav xis nyob; Nws yuav tswj tau qhov chaw zoo microclimate.
Xaiv cov khoom siv insulating kom raugyuav txo qhov kub poob, vim qhov uas nws yuav tsis tsim nyog rau "sub txoj kev". Ua tsaug rau qhov no, cov nqi nyiaj txiag rau cov cua sov yuav raug txo kom tsawg. Xws li cov nyiaj khaws cia sai sai yuav rov qab tag nrho cov nyiaj uas yuav siv rau kev yuav khoom cua sov.
