Thermal conductivity ntawm sandwich panels: lub tswv yim, cov yam ntxwv tseem ceeb, qhov ntev, tuab, thermal conductivity coefficient, kev teeb tsa kev cai, qhov zoo thiab qhov tsi

2024 Tus sau: Howard Calhoun | [email protected]. Kawg hloov kho: 2023-12-17 10:28

Sandwich panels hnub no yog suav tias yog cov khoom siv hauv tsev tshwj xeeb. Thaum muab piv nrog cov kev daws teeb meem classic, cov vaj huam sib luag yeej ntau yam. Lawv feem ntau muab piv rau cov yam ntxwv nrog:

• paj;
• gas silicate cib;
• brick;
• ntoo.

Tag nrho cov kev xaiv no poob ntawm cov thermal conductivity rau sandwich panels.

Lub tswvyim ntawm thermal conductivity

Thermal conductivity yog lub peev xwm ntawm cov khoom siv los ua cua sov. Qhov no parameter yog xam raws li ib tug meej formula. Nws hais txog cov cua sov uas dhau los ntawm cov qauv ntawm cov khoom 1 m tuab. Nws cheeb tsam yuav tsum yog 1 m2. Nyob rau hauv cov ntaub ntawv no, tshav kub dhau nyob rau hauv ib tug thib ob ntawm ib chav tsev kubgradient.

Lub tshuab nqus tsev yog qhov zoo tshaj plaws thermal rwb thaiv tsev khoom. Nws thermal conductivity yog xoom. Txawm li cas los xij, yog tias nyob rau hauv kev tsim cov thermoses nws muaj peev xwm ua tiav qhov zoo ib yam ntawm lub tshuab nqus tsev cosmic, hauv kev tsim kho ib qho yuav tsum muaj cov ntsiab lus nrog ib qho ntawm cov khoom siv hluav taws xob zoo - cua.

Thermal conductivity ntawm panels nrog sib txawv tshav kub-insulating txheej. Cov yam ntxwv tseem ceeb

txhawm rau txiav txim siab thermal conductivity ntawm sandwich panels, nws yog ib qho tsim nyog kom nkag siab txog cov khoom siv hauv paus. Lub coefficient ntawm thermal conductivity yuav nyob ntawm qhov no. Piv txwv li, cov ntxhia wool nrog qhov sib txawv ntawm qhov sib txawv muaj qhov thermal conductivity ntawm 0.38 txog 0.7. Qhov zoo tshaj plaws ntawm cov vaj huam sib luag siv cov ntxhia wool yog kev nyab xeeb hluav taws. Txawm li cas los xij, paj rwb ntaub plaub muaj peev xwm nqus dej rau hauv nws tus kheej, uas ua rau kom tsis muaj cua sov-insulating yam ntxwv. Cov khoom sags dhau sij hawm, ntawm lwm yam, xws li cov sandwich panels muaj ib tug zoo impressive luj.

Cov thermal conductivity ntawm cov sandwich panels yuav txawv me ntsis yog tias lub hauv paus yog polystyrene ua npuas ncauj. Lub thermal conductivity coefficient nyob rau hauv cov ntaub ntawv no yuav txawv ntawm 0.03 mus rau 0.7, nyob ntawm seb qhov ceev. Cov khoom tsis nqus dej noo, uas yog lub ntsiab kom zoo dua ntawm nthuav polystyrene. Tab sis muaj qee qhov tsis txaus ntseeg ntawm no, ntawm lawv cov tshuaj tsis muaj zog, brittleness, susceptibility rau kev puas tsuaj ntawm qhov kub ntawm 70 ˚С yuav tsum tau qhia. Hauv qhov no, cov khoom siv tau raug xa mus rau chav kawm hluav taws kub G2. Tsis tas li ntawd, Styrofoam nyiamnas. Nyob rau hauv kev cuam tshuam ntawm roj av, acetone, cov khoom melts thiab tsis tuaj yeem tiv taus roj.

Cov thermal conductivity ntawm sandwich panels yuav qis tshaj yog tias polyurethane ua npuas ncauj yog lub hauv paus. Qhov ntsuas qhov ntsuas no txawv ntawm 0.019 txog 0.25. Cov khoom siv muaj zog, ntom thiab lub teeb. Nws yog tshuaj resistant thiab tsis nqus noo noo. Cov nas tsuag tsis zoo rau polyurethane ua npuas ncauj, fungi thiab pwm tsis tsim nyob rau hauv nws. Ua haujlwm kub txog +160 ˚С. Cov khoom yog nyob rau hauv chav kawm thib ob ntawm hluav taws kub.

Thaum koj paub qhov thermal conductivity ntawm sandwich panels, koj tuaj yeem xav txog kev tsim khoom. Piv txwv li, cov qauv nrog nthuav polystyrene thiab ntxhia wool yog tsim los ntawm gluing technology, thaum polyurethane ua npuas ncauj yog foamed nyob rau hauv lub panels, uas tso cai rau kom ua tau ib tug high-lub zog monolithic qauv.

Kev ntsuas kub engineering

Qhov kev suav no yuav tsum xaiv hom qhaub cij thiab lawv cov tuab. Cov mis yog qhov nyuaj heev, nws yuav siv sij hawm rau hauv tus account qhov chaw ntawm lub tsev, hom tsev, qhov nruab nrab txhua xyoo qhov kub thiab txias, tsim kub nyob rau hauv lub tsev, hom panels, lub sij hawm ntawm lub cua sov lub caij, tus txheeb ze humidity. cua sab hauv. Yuav kom coj mus rau hauv tus account tag nrho cov tsis yog dhau lub hwj chim ntawm tus layman. Yog lawm, thiab chav kawm hauv tsev kawm ntawv hauv physics yuav tsis txaus ntawm no. Yog li ntawd, kev ntsuas hluav taws xob hluav taws xob tau siv sijhawm ntev heev, qhov uas koj yuav tsum paub tsuas yog tus nqi yuav tsum tau ua.

Piv txwv li, rau European feem ntawm Russia, cov phab ntsa panels yuav tsum muaj qhov tsawg kawg nkaus thicknesshauv 120 mm. Qhov no siv rau polystyrene ua npuas ncauj. Yog hais tias peb tham txog cov ntxhia wool, tus nqi no nce mus rau 150 mm. Nyob rau hauv cov ntaub ntawv ntawm lub ru tsev panels, cov nqi no yuav yog 180 thiab 250 hli, feem. Qhov kev suav no muaj feem xyuam rau cov chav uas huab cua kub yuav tsum sib npaug li 20 ˚С. Thermal conductivity yuav tsawg dua yog hais tias cov panels muaj ib tug tsawg impressive thickness. Txawm li cas los xij, ntxiv rau thermal conductivity, kuj tseem muaj cov coefficient ntawm thermal kuj. Nws tseem yog ib qho tseem ceeb uas yuav tau xav txog qhov sib hloov ntawm cov cua sov.

Yog tias cov thermal conductivity ntawm polyurethane ua npuas ncauj rwb thaiv tsev yog 0.02, ces tus nqi no yuav raug tswj xyuas nrog qhov txo qis rau 80 lossis 60 hli. Nyob rau hauv thawj rooj plaub, lub thickness yog 100 hli. Raws li rau cov coefficient ntawm thermal kuj, nws yuav txo los ntawm 5 mus rau 3. Tus nqi nruab nrab yog 4. Lub tshav kub hloov coefficient yuav nce. Rau thicknesses ntawm 100, 80 thiab 60 hli, qhov parameter no yog 0.193; 0.24; thiab 0.315 raws.

Thaum ua cov txheej txheem thev naus laus zis thev naus laus zis, koj kuj tuaj yeem txaus siab rau thermal conductivity ntawm sandwich panels rau kev ua haujlwm. Qhov ntsuas no yuav yog 0.034 ntawm qhov kub ntawm 10 ˚С.

Thermal conductivity ntawm Hlau Profile khoom

Hlau Profile muab kev lag luam nrog cov ntxhia wool sandwich panels. Cov thermal conductivity ntawm cov khoom no txawv ntawm 0.046 txog 0.048. Qhov ceev yog 110 kg/m³. Qhov kawg compressive zog yog 55 kPa. Koj tuaj yeem xav txog cov coefficient ntawm thermal conductivityrwb thaiv tsev sandwich panels "Metalprofile" yog nyob rau hauv nteg polystyrene ua npuas ncauj. Qhov ntsuas no yog 0.04 ntawm 25 ˚С. Qhov ceev ntawm no yog 17 kg/m ^{3. Lub zog compressive yog 0.1 MPa. Yog tias qhov ntsuas thickness ntawm cov panels yog ntau tshaj qhov siab tshaj plaws thickness ntawm cov khoom tsim, qhov yuav tsum tau loj ntawm phab ntsa los yog ru tsev yuav tsum tau sau nrog ib tug ntxiv txheej ntawm rwb thaiv tsev.}

Thaum koj paub cov coefficient ntawm thermal conductivity ntawm rwb thaiv tsev ntawm cov sandwich panels "Metal Profile", koj yuav tsum nug txog thaj tsam ntawm kev siv cov khoom no. Lawv tau tsim los tsim cov phab ntsa sab hauv thiab sab nrauv, ua haujlwm thiab tsis ua haujlwm ceilings, partitions thiab ru tsev. Lawv tuaj yeem siv rau hauv kev tsim kho tshiab thiab hauv kev tsim kho cov khoom siv rau ntau lub hom phiaj. Cov no tuaj yeem yog cov chaw tsim khoom thiab chaw cia khoom, khoom noj khoom haus thiab kev ua liaj ua teb, kev tsim vaj tsev, thiab lwm yam. Cov khoom tuaj yeem ua haujlwm ntawm qhov kub ntawm -65 txog +85 ˚С.

Qhov ntau thiab tsawg ntawm cov sandwich panels ntawm qhov piv txwv ntawm cov khoom siv hlau

Ua ntej yuav cov sandwich panels, koj yuav tsum nug txog lawv qhov ntev. Qhov tsawg kawg nkaus thiab siab tshaj plaws thicknesses yog 50 thiab 250 hli feem. Kuj muaj xws li qhov dav ua haujlwm. Nws tuaj yeem sib npaug li 1000, 1160 thiab 1190 mm. Parameters uas tsis yog cov uas tau teev tseg yuav tsum tau txiav txim nyias. Ntev tuaj yeem sib txawv ntawm 2000mm txog 14000mm.

Cov yam ntxwv ntawm polyurethane ua npuas ncauj sandwich panels

Coefficient ntawm thermal conductivitySandwich panels 100 hli yuav yog 0.02. Ua hauj lwm nrog xws li daim hlau tuaj yeem nqa tawm ntawm qhov kub ntawm +5 txog +30 ˚С. Lub neej ua haujlwm ncav cuag 30 xyoo.

Cov khoom siv tiv taus qhov hnyav thiab ya raws. Nws muaj kev nyab xeeb, uas txhais tau tias nws tuaj yeem siv tau hauv cov tsev nyob. Kev khiav hauj lwm kub txawv ntawm -80 txog +85 ˚С. Kev poob qhov kub tiag tiag yuav yog 1.7 npaug qis dua li tus qauv.

Txoj cai kev teeb tsa

Kev teeb tsa cov vaj huam sib luag pib los ntawm kaum ntawm lub tsev. Kev txhim kho yog pib los ntawm lub hauv paus thiab txuas ntxiv nyob rau hauv cais tiers, txav mus rau hauv qab kom txog rau thaum lub siab xav tau ntawm lub tsev mus txog. Ib qho 20 mm expansion sib koom ua ke yog muab los ntawm ib tus neeg tiers. Cov khoom txhawb nqa ntawm lub hauv paus yog ntsia rau ntawm lub plinth siv lub thauj tog rau nkoj dowel. Yog tias tsim nyog, koj tuaj yeem nteg ib txheej ntawm cov pob zeb hauv av.

Lub vaj huam sib luag sandwich yog nqa mus rau txoj haujlwm ntsug nrog lub tshuab nqa thiab muab tso rau ntawm lub plinth. Verticality yuav tsum tau soj ntsuam nrog cov ntsuas ntsuas los yog cov kav dej. Cov khoom raug nias tawm tsam cov purlins thiab kho nrog kho vajtse.

Qhov zoo thiab qhov tsis zoo ntawm kev siv nyiaj

Sandwich panels yog qhov zoo vim tias lawv tuaj yeem ua haujlwm hauv qhov kub ntawm -65 txog +85 ˚С. Cov khoom yog ib puag ncig tus phooj ywg, ruaj thiab muaj kev sib txuas zoo nrog kev ntseeg siab. Qhov tsis zoo ntawm cov sandwich panels yuav pw hauv cov rwb thaiv tsev, uas nws thiaj li ua ncuav thiababsorbs noo noo. Qhov no siv rau cov ntxhia wool, uas yog saturated nrog dej thiab poob nws cov yam ntxwv kev ua tau zoo. Qhov no kuj tseem siv tau rau lwm cov thermal insulators uas nyiam cov nas thiab txhawb pwm thiab pwm.