Suab Absorption Thiab Thermal Insulation Principles Of Mineral Fiber Boards - Xov Xwm

I. Suab Absorption Principple: "Triple Poob" ntawm Suab Ntshai los ntawm Porous Structure

Lub essence ntawm lub suab nqus ntawm cov ntxhia fiber boards yog rauhloov suab zog rau hauv thermal zog rau dissipation. Qhov tseem ceeb yog nyob rau hauv ntau qhov sib cuam tshuam micro- pores (nrog qhov pore qhov ntau thiab tsawg ntawm 10 mus rau 100 μm) hauv cov laug cam, uas ua tiav triple interception ntawm suab tsis:

1. Pore Friction Loss

Thaum lub suab nthwv dej tsoo lub rooj tsavxwm nto, lawv nkag mus rau hauv lub qhov hws thiab nkag mus rau hauv lub rooj tsavxwm sab hauv, sib tsoo thiab rub tawm tsam cov randomly interwoven fibers. Lub zog ntawm lub suab tsis muaj zog yog absorbed los ntawm cov fibers thiab hloov mus rau hauv ib qho thermal zog uas dissipates, yog li ua rau lub suab tsis muaj zog siv.

Qhov tseem ceeb cuam tshuam qhov tseem ceeb: Qhov siab dua qhov porosity (Ntau dua lossis sib npaug li 75% rau siab- cov khoom zoo) thiab qhov sib txawv ntawm qhov pore loj, qhov loj dua qhov kev sib txhuam poob. Conversely, siab -cov boards ceev muaj compressed pores, uas txo cov suab nrov absorbing efficiency.

2. Huab cua viscous poob

Cov huab cua nyob rau hauv lub pores vibrates reciprocally nrog lub suab tsis, tsim viscous tiv thaiv lub pore phab ntsa, uas converts suab zog rau hauv thermal zog. Cov nyhuv no yog qhov tshwj xeeb tshaj yog rau nruab nrab- mus rau- lub suab nrov zaus (500–2000 Hz, xws li tib neeg lub suab thiab lub suab nrov hauv chaw ua haujlwm), ua cov pob zeb fiber ntau zoo tagnrho rau cov qab nthab hauv cov chaw ua haujlwm thiab cov khw muag khoom.

3. Suab Wave Reflection thiab cuam tshuam poob

Lub suab nthwv dej uas tsis tau nqus tau los ntawm ntau qhov kev xav hauv lub qhov hws. Thaum xav txog, lawv cuam tshuam nrog cov xwm txheej tom ntej lub suab nthwv dej, ntxiv txo suab zog.

Kev ua kom zoo ntawm cov qauv: grooves thiab lub voj voog qhov tsim los ntawm qhov chaw ntawm qee lub suab-absorbing boards qhia suab nthwv dej tob rau hauv lub rooj tsavxwm, txuas rau txoj kev rov qab thiab ua kom lub suab nqus tau zoo (cov laug cam tuaj yeem ua tiav Noise Reduction Coefficient (NRC) ntawm ntau dua 0.8).

Cov ntsiab lus tseem ceeb ntawm Sound Absorption Performance:

Cov fibers zoo dua (3-5 μm) thiab ntau qhov sib cuam tshuam qhov pores ua rau lub suab zoo dua.
Kev nqus suab zoo dua rau qhov nruab nrab - mus rau - cov zaus ntau dua li qhov tsawg zaus. Txhawm rau txhim kho qis- zaus lub suab nqus, ua kom cov board tuab (piv txwv li, los ntawm 15 hli mus rau 25 hli rau lub qab nthab boards) lossis txais yuav ob - txheej txheej txheej txheej.

II. Thermal Insulation Principple: "Low Thermal Conductivity Combination" ntawm Fibers thiab Chaw Nres Tsheb

Lub hauv paus ntawm thermal rwb thaiv tsev (kub preservation) yog rauimpede tshav kub hloov. Thaum tshav kub kub hloov tau tshwm sim los ntawm peb mechanisms: conduction, convection, thiab hluav taws xob. Mineral fiber boards inhibit tag nrho peb txoj hauv kev los ntawm kev tsim qauv:

1. Inhibition ntawm tshav kub conduction (Core Function)

Thaum tshav kub kub conduction los ntawm cov khib nyiab yog ntau npaum li cas los ntawm gases. Cov fibers ntawm cov pob zeb hauv av fiber ntau yog teem rau hauv ib qho xoob network nrog cov ntsiab lus sib cuag tsawg, ua rau muaj kev cuam tshuam loj rau txoj kev tshav kub ntawm cov fibers. Lub caij no, cov pores tau puv nroghuab cua nyob ruaj khov(nrog cov thermal conductivity ntawm tsuas yog 0.023 W / (m·K), qis dua cov fibers (0.04–0.05 W / (m·K))). Cov huab cua nyob ruaj ruaj ua raws li qhov nruab nrab thermal rwb thaiv tsev zoo, ntxiv kom txo tau cov cua sov ua kom zoo.

Qhov taw qhia tseem ceeb: High-cov pob zeb hauv av fiber ntau muaj cov thermal conductivity tsawg dua lossis sib npaug rau 0.038 W / (m·K); tus nqi qis dua, qhov zoo dua qhov kev ua haujlwm thermal rwb thaiv tsev. Qhov ceev yuav tsum tau tswj ntawm 80-120 kg / m³-hnyav siab heev txo porosity thiab cuam tshuam cov rwb thaiv tsev.

2. Inhibition ntawm tshav kub Convection

Cov pores hauv lub rooj tsavxwm yogkaw los yog ib nrab -kaw, nrog qhov me me (dav me dua qhov loj me me rau cov cua convection). Qhov no tiv thaiv qhov loj - ntsuas cua convection nyob rau hauv lub qhov hws, thaiv cov cua kub hloov ntawm convection.

Lub luag haujlwm ntawm cov dej noo- pov thawj kev hloov kho: Dej- cov khoom siv tshuaj tua kab mob tiv thaiv kev nqus dej, kom tsis txhob muaj qhov hws los ntawm cov dej noo (dej muaj cov thermal conductivity ntau dua 20 npaug ntawm huab cua), yog li tswj kev ua haujlwm rwb thaiv tsev hauv qhov chaw ntub dej.

3. Txo cov hluav taws xob cua sov

Fibers lawv tus kheej muaj kev cuam tshuam thiab nqus cov hluav taws xob thermal rau qee yam. Qee qhov siab-kawg rwb thaiv tsev yog coated nrog infrared- cov khaubncaws sab nraud povtseg (piv txwv li, nano-titanium dioxide) ntawm cov fiber ntau kom muaj kev cuam tshuam txog kev kub hnyiab, txhim kho kev ua haujlwm rwb thaiv tsev nyob rau hauv siab - qhov kub thiab txias (tsim rau kev cob qhia kev lag luam thiab siab -cov kav dej kub).

Cov ntsiab lus tseem ceeb ntawm kev ua haujlwm thermal rwb thaiv tsev:

Cov porosity siab dua thiab cov ntsiab lus ntawm huab cua ua rau cov thermal rwb thaiv tsev zoo dua.
Cov dej noo- pov thawj kev kho mob yog qhov tseem ceeb rau kev tswj xyuas kev ua haujlwm rwb thaiv tsev- kev nqus dej tuaj yeem ua rau lub rooj tsavxwm thermal conductivity ntau dua 50%.