Cov thermal conductivity ntawm nthuav dav polystyrene yog ib qho ntawm cov yam ntxwv tseem ceeb uas tsis yog cov kws tshaj lij xwb, tab sis kuj yog cov neeg siv khoom zoo tib yam txaus siab rau. Cov khoom no tseem hu ua polystyrene thiab yog cov rwb thaiv tsev thermal, uas yog 98% huab cua. Nws yog encased nyob rau hauv nthuav polystyrene tawb.
Cov qauv muaj kev nyab xeeb rau kev noj qab haus huv, yog li cov khoom siv los ua cov ntim khoom noj. Nws yog ib qho yooj yim rau txheej txheem, dav siv hauv kev tsim kho kev lag luam, thiab kuj muaj tus nqi qis.
Yam koj yuav tsum paub txog thermal conductivity ntawm Styrofoam
Cov thermal conductivity ntawm nthuav polystyrene yog qhov tsawg heev, vim tias cov huab cua nyob ntawm lub hauv paus ntawm cov khoom kuj muaj cov yam ntxwv zoo li no. Yog li, cov lus piav qhia qhov ntsuas hluav taws xob sib txawv ntawm 0.037 txog 0.043 W / mK, raws li huab cua, tus yam ntxwv no yog 0.027 W / mK.
nthuav polystyrene yog tsim raws li GOST15588-86 thiab yog tus cwj pwm los ntawm kev txuag hluav taws xob zoo, kev pab cuam lub neej ntev, tuaj yeem txo cov nqi cua sov thiab tiv thaiv kev khov. Cov khoom zoo li no tau khaws cia txawm tias muaj qhov kub thiab txias thiab cov av noo siab, yog li nthuav dav polystyrene tuaj yeem siv rau hauv cov khoom lag luam, nrog rau kev tsim cov khoom siv tub yees.
Cov thermal conductivity ntawm nthuav polystyrene yog tsawg, yog li cov khoom siv no tuaj yeem siv tsis tau rau sab hauv, tab sis kuj rau sab nrauv kho kom zoo nkauj. Txawm li cas los xij, tus yam ntxwv no yuav txawv nyob ntawm qhov ceev. Qhov siab dua, qhov ntau dua cov ntsiab lus styrene, qhov phem dua cov polystyrene ua npuas ncauj yuav khaws cov cua sov. Piv txwv li, yog tias peb tab tom tham txog extruded polystyrene ua npuas ncauj, ces nws cov thermal conductivity yuav yog 0.028W / mK, vim hais tias styrene granules nyob rau hauv cov ntaub ntawv no yog nyob rau hauv cov qauv ntawm cov ntaub ntawv, thiab tsis muaj qhov sib txawv ntawm lawv.
Sib piv cov thermal conductivity ntawm ntau hom
Rau qhov sib piv, peb tuaj yeem txiav txim siab ntau qib ntawm nthuav dav polystyrene, qhov ntom ntom thiab thermal conductivity ntawm qhov sib txawv. Qhov ceev ntawm PSB-S15 tsis ncav cuag 15 kg / m3, thaum lub thermal conductivity ntawm 0.07-0.08 W / mK. Raws li rau PSB-S35 hom, nws qhov ceev yog sib npaug li qhov txwv ntawm 25.1 txog 35 kg / m 3, thaum lub thermal conductivity yog 0.038 W / mK. Ntawm kev muag khoom koj tuaj yeem pom extruded polystyrene ua npuas ncauj. Hauv qib 35, qhov ceev sib txawv ntawm 33 txog 38, thaum lub thermal conductivity yog 0.03.
Yog tias koj muaj lub cim 45 rau pem hauv ntej,ces tus thawj parameter yuav txawv ntawm 38.1 mus rau 45, thaum lub thib ob yuav sib npaug zos rau 0.032. Lub thermal conductivity ntawm nthuav polystyrene yog tsawg dua piv rau cov yam ntxwv yam ntxwv ntawm lwm yam ntaub ntawv. Piv txwv li, nthuav av nplaum pob zeb nrog qhov ceev ntawm 1200 kg / m 3muaj thermal conductivity ntawm 0.58.
Sib piv cov thermal conductivity ntawm Styrofoam nrog lwm cov ntaub ntawv
Nyob rau hauv ntau qhov chaw ntawm kev lag luam thiab kev tsim kho, nthuav polystyrene yog siv niaj hnub no. Cov thermal conductivity, qhov sib piv ntawm cov uas yuav tau hais hauv qab no, yog qhov tsawg heev. Tab sis rau cov ntxhia wool, tus yam ntxwv no txawv ntawm 0.07 txog 0.08 W / mK. Raws li kev ua vaj tse, nws cov thermal conductivity yuav yog 1.30, thaum rau cov pob zeb ntxiv nws yuav yog 2.04.
Cov pob zeb nthuav dav thiab ua npuas ncauj muaj cov thermal conductivity sib npaug li 0.58 thiab 0.37, raws li. Kev nthuav dav polystyrene, rau kev sib piv, muaj cov thermal conductivity ntawm 0.028W / mK. Lub thermal conductivity ntawm polystyrene ua npuas ncauj thiab polystyrene ua npuas ncauj kuj feem ntau piv. Hauv thawj kis, tus nqi no yuav yog 0.07 thaum nws los txog rau slabs.
Cov yam ntxwv tseem ceeb: kev nyab xeeb, ua suab nrov thiab ua haujlwm tsis muaj cua
Styrofoam muaj kev nyab xeeb thiab rov siv tau dua. Nyob rau tib lub sijhawm, cov khoom tsis zoo yuav tsis tso rau hauv ib puag ncig. Raws li kev tshawb fawb, tsis muaj qhov txaus ntshai styrene tau pom nyob rau hauv cov tsev tsim los ntawm nthuav polystyrene. Hais txog soundproofing thiabKev tiv thaiv cua, tom qab ntawd thaum siv cov polystyrene nthuav dav, tsis tas yuav siv cov khoom siv ntxiv uas ua rau kom muaj zog cua thiab lub suab rwb thaiv tsev.
Yog hais tias lub suab nqus lub peev xwm yuav tsum tau nce, lub thickness ntawm cov khoom yuav tsum tau nce. Koj twb paub cov thermal conductivity ntawm extruded polystyrene ua npuas ncauj, tab sis qhov no tsis yog tib yam yam ntxwv uas koj yuav tsum paub txog ua ntej yuav cov khoom no. Piv txwv li, nthuav polystyrene tsis yog hygroscopic, yog li nws tsis nqus dej thiab noo noo, tsis o los yog deform, thiab tsis yaj hauv kua. Yog tias nthuav dav polystyrene tso rau hauv dej, tsuas yog 3% ntawm lub rooj tsavxwm qhov hnyav yuav nkag mus rau hauv cov qauv, thaum cov khoom siv yuav tsis hloov pauv.
Chav thiab dej khiav tawm yooj yim los ntawm Styrofoam, yog li yuav tsum tau saib xyuas kom tsis txhob muaj qhov sib xyaw. Rau qhov no, kev tsim qauv yog ua raws. Cov dej tsis kam ntawm cov polystyrene nthuav dav tso cai rau nws siv rau kev rwb thaiv tsev ntawm lub hauv paus, qhov twg kev sib cuag nrog hauv av yog inevitable.
Ntxiv nta: lom thiab tshuaj inertness
Rwb thaiv tsev ua npuas ncauj polystyrene, thermal conductivity uas tau hais los saum toj no, tiv taus cov tshuaj lom neeg thiab lom neeg. Cov khoom siv yuav khaws nws cov khoom txawm tias nws cov qauv cuam tshuam:
- xab npum daws;
- acids;
- ntsev tov los ntawm hom dej hiav txwv;
- khoom noj kom dawb;
- ammonia;
- gypsum;
- dej-soluble xim;
- adhesive solutions;
- lime;
- cement.
Raws li cov kua qaub, Styrofoam yuav tsum tsis txhob cuam tshuam los ntawm nitric thiab concentrated acetic acids. Thaum lub sij hawm kev teeb tsa, kev nkag mus rau cov khoom siv yuav tsum raug cais tawm ntawm cov nas thiab kab tsuag, vim tias lawv tuaj yeem ua rau cov qauv puas. Nyob rau hauv kev cuam tshuam ntawm cov kev daws teeb meem, cov khoom yuav ua rau ib nrab decompose, thiab nyob rau hauv tus ntawm cov organic solvents. Kev ruaj ntseg tuaj yeem txiav txim siab los ntawm qhov sib piv ntawm cov hlwb qhib thiab kaw, uas nyob ntawm hom thiab hom rwb thaiv tsev.
Hluav taws kub ntawm Styrofoam
Cov thermal conductivity ntawm nthuav polystyrene tau hais los saum toj no, tab sis nws tseem ceeb heev kom paub txog qhov hluav taws kub ntawm cov khoom uas yog combustible, tab sis muaj hluav taws kub zoo, vim hais tias qhov kub ntawm autoignition yog 4910 ° C. Yog tias peb piv qhov ntsuas no nrog ntoo, ces nws yog 1.8 npaug siab dua, vim tias tsuas yog 2600 ° C yuav txaus rau tsob ntoo.
chav kawm muaj nplaim taws thiab muaj peev xwm ua kom sov
Yog tias tsis muaj hluav taws rau 4 vib nas this, cov khoom yuav tuag ntawm nws tus kheej. Thaum lub sij hawm combustion, lub rwb thaiv tsev yuav tso cua sov nyob rau hauv tus nqi ntawm 1000 MJ / m 3, raws li ntoo, daim duab no txawv ntawm 7000 rau 8000 MJ / m 3, qhov no qhia tias thaum Styrofoam kub hnyiab, qhov kub yuav qis dua. Ntawm kev muag khoom niaj hnub no koj tuaj yeem nrhiav tus kheej tua tus kheej polystyrene ua npuas ncauj, uas yog tsim nrog ntxiv cov nplaim hluav taws. Tab sis dhau sij hawm, cov nyhuv no tau ploj mus, thiab cov khoom siv uas tau koom nrog G2 combustibility pab pawg yuav nws thiaj li koom nrog G4 chav kawm.
Styrofoam thickness
nthuav polystyrene, thermal conductivity, thickness uas koj yuav tsum paub yog tias koj npaj yuav cov rwb thaiv tsev no, yog tsim hnub no los ntawm cov tuam txhab sib txawv. Daim ntawv tuaj yeem raug txwv hauv thickness ntawm 20 hli mus rau 20 cm. Tib lub sijhawm, ntau tus neeg siv khoom xav paub seb daim ntawv twg yog qhov zoo dua los xaiv. Txhawm rau txiav txim siab tus nqi no, koj yuav tsum nug dab tsi yog qhov kev tiv thaiv rau kev hloov pauv cua sov. Txhua yam ntawm no yuav nyob ntawm thaj tsam ntawm lub tebchaws. Piv txwv li, nyob rau hauv nruab nrab ntawm Moscow, qhov kev tiv thaiv ntawm phab ntsa yuav tsum yog 4.15 m 2° C / W, rau cov cheeb tsam yav qab teb, 2.8 m yuav txaus ntawm no 2 °C/Tue
