Xyoo tas los no, hauv kev tsim kho ntawm lub tsev lossis kev kho, ntau xim yog them rau kev siv hluav taws xob. Nrog twb muaj roj tus nqi roj muaj lawm, qhov no cuam tshuam. Ntxiv mus, nws zoo nkaus li tias cov nyiaj khaws cia yuav tau txais txiaj ntsig ntxiv. Txhawm rau kom raug xaiv cov khoom sib xyaw thiab cov ntaub ntawv tuab ntawm cov ntaub ntawv hauv cov khoom qab zib (phab ntsa, vov tsev, vov tsev) koj yuav tsum paub cov thermal conductivity ntawm cov ntaub ntawv qub tsev. Cov xeeb ceem no tau qhia ntawm cov pob khoom nrog cov ntaub ntawv, thiab nws tseem tsim nyog ntawm qib tsim. Tom qab tag nrho, nws yog qhov tsim nyog los daws cov khoom uas los tsim phab ntsa ntau dua li sov lawv, uas tuab yuav tsum yog txheej.
Dab tsi yog thermal conductivity thiab thermal kuj
Thaum xaiv cov ntaub ntawv hauv tsev rau kev tsim kho, nws yog qhov tsim nyog kom them sai sai rau cov yam ntxwv ntawm cov ntaub ntawv. Ib qho ntawm cov haujlwm tseem ceeb yog thermal conductivity. Nws tau tso tawm los ntawm cov thermal conductivity coefficient. Qhov no yog qhov ntau npaum li cas ntawm cov cua sov uas tuaj yeem ua ib lossis lwm cov khoom hauv ib ntu ntawm lub sijhawm. Ntawd yog, cov me me no cov coefficient, qhov tsis zoo ntawm cov khoom nqa tawm thaum tshav kub. Thiab lwm yam khoom, qhov siab dua daim duab, cov cua kub tau muab zoo dua.
Daim duab kos uas qhia txog qhov sib txawv hauv cov thermal conductivity ntawm cov ntaub ntawv
Cov ntaub ntawv nrog cov thermal tsawg thermal yog siv rau rwb thaiv tsev, nrog siab - hloov lossis tshem tawm cov cua sov. Piv txwv li, hluav taws xob yog ua los ntawm txhuas, tooj lossis hlau, vim lawv tau ua kom zoo sib xws, lawv muaj lub siab thermal caperivity coefficient. Rau rwb thaiv tsev, cov ntaub ntawv nrog tsawg thermal capitality coefficient siv - lawv tau zoo dua khaws cia cua sov. Yog tias cov khoom muaj ob peb txheej ntawm cov khoom siv, nws thermal conductivity txhais tau hais tias yog tus lej ntawm cov coefficients ntawm txhua cov ntaub ntawv. Thaum xam, thermal conductivity ntawm txhua ntawm "khoom qab zib" Cheebtsam tau raug xam tau, qhov tseem ceeb pom tau summed up. Feem ntau, peb tau txais cov thermal rwb thaiv tsev muaj peev xwm ntawm cov qauv txuas (phab ntsa, poj niam txiv neej, qab zib).
Lub thermal conductivity ntawm cov ntaub ntawv hauv tsev qhia tias cov cua sov uas nws plam ib ntawm lub sijhawm.
Kuj tseem muaj cov tswvyim xws li thermal tsis kam. Nws qhia txog qhov muaj peev xwm ntawm cov khoom los tiv thaiv cov zaj ntawm nws. Ntawd yog, nws yog tus nqi rov qab nyob rau hauv kev sib raug rau thermal conductivity. Thiab yog tias koj pom cov khoom siv nrog cov thermal siab, nws tuaj yeem siv rau cov rwb thaiv tsev thermal. Ib qho piv txwv ntawm cov khoom siv hluav taws xob thermal yuav yog cov khoom siv nrov los yog basalt wool, ua npuas ncauj, thiab lwm yam. Cov ntaub ntawv nrog cov tshuaj thermal tsawg yog qhov xav tau rau cov hmoov txhuas lossis cov cua sov. Piv txwv li, txhuas lossis cov hlau radiators tau siv rau cua sov, vim lawv tau zoo muab zoo.
Cov lus ntawm thermal conductivity ntawm thermal rwb thaiv tsev cov ntaub ntawv
Txhawm rau kom lub tsev yuav tsum tau yooj yim dua los tswj cov cua sov nyob rau lub caij ntuj sov thiab lub tsev cua sov ntawm lub caij ntuj sov uas yog xam rau txhua cheeb tsam. Qhov muaj pes tsawg leeg ntawm "cov khoom qab zib" ntawm cov phab ntsa, tub los ntxhais thiab qab nthab, cov tuab tuab, yog qhov tsawg dua (thiab zoo dua - tsawg dua) pom zoo rau koj thaj av.
Coefficient ntawm cov cua sov hloov ntawm cov ntaub ntawv ntawm cov ntaub ntawv tsim tsev niaj hnub no rau cov qauv ntim
Thaum xaiv cov ntaub ntawv nws yog ib qho tsim nyog los xav txog tias qee qhov ntawm lawv (tsis yog txhua txhua) hauv cov av noo uas muaj ntau yam zoo dua. Yog tias muaj qhov teeb meem no thaum lub sijhawm ua haujlwm ntev, hauv kev suav, thermal conductivity yog siv rau lub xeev no. Lub thermal conductivity coefficients ntawm cov ntaub ntawv tseem ceeb uas tau siv rau rwb thaiv tsev yog qhia hauv rooj.
| Npe ntawm cov khoom siv | Coefficient ntawm thermal conductivity w / (M · ° C) | ||
|---|---|---|---|
| Hauv kev mob qhuav | Nrog cov av noo | Nrog cov av noo | |
| Xav woolen | 0.036-0.041 | 0.038-0.044 | 0.044-0.050 |
| Pob zeb Cov Khoom Siv Hluav Taws Xob 25-50 kg / mg / m3 | 0.036 | 0.042. | 0 , 045 |
| Pob zeb ntxhia pob zeb 40-60 kg / M3 | 0.035 | 0.041 | 0.044 |
| Pob zeb Mineral Wool 80-125 kg / m3 | 0.036 | 0.042. | 0.045 |
| Pob zeb Cov Khoom Siv Hluav Taws Xob 140-175 Kg / M3 | 0.037 | 0,043. | 0,0456. |
| Pob zeb Mineral Tsiaj Quav 180 kg / M3 | 0.038 | 0.045 | 0,048. |
| IARWILE 15 KG / M3 | 0,046. | 0.049. | 0.055 |
| Ipabater 17 kg / m3 | 0.044 | 0.047. | 0,053 |
| Xa cov quav 20 kg / m3 | 0.04. | 0,043. | 0,048. |
| Xa khoom 30 kg / m3 | 0.04. | 0.042. | 0,046. |
| Iav 35 kg / m3 | 0.039 | 0.041 | 0,046. |
| Planwater 45 kg / m3 | 0.039 | 0.041 | 0.045 |
| Khob iav 60 kg / m3 | 0.038 | 0,040. | 0.045 |
| GARPWILE 75 KG / M3 | 0.04. | 0.042. | 0.047. |
| PLAYWILE 85 KG / M3 | 0.044 | 0,046. | 0,050 |
| Polystyrene ua npuas ncauj (ua npuas ncauj, PPS) | 0.036-0.041 | 0.038-0.044 | 0.044-0.050 |
| Extruded nthuav dav polystyrene ua npuas ncauj (EPS, XPS) | 0,029 | 0.030 | 0.031 |
| Ua npuas ncauj ua npuas, ua cov kev daws teeb meem, 600 kg / m3 | 0.14. | 0.22. | 0.26. |
| Ua npuas ncauj ua npuas ua npuas, aerated qhob ntawm xis mas micrp, 400 kg / m3 | 0.11 | 0.14. | 0.15 |
| Ua npuas ncauj ua npuas, aerated qhob rau ntawm txoj kua txiv qaub, 600 kg / m3 | 0.15 | 0.28. | 0.34. |
| Ua npuas ncauj ua npuas, aerated qhob rau ntawm txoj kua txiv qaub, 400 kg / m3 | 0.133. | 0.22. | 0.28. |
| Ua npuas ncauj iav, crumb, 100 - 150 kg / m3 | 0.043-0.06 | ||
| Ua npuas ncauj iav, crumb, 151 - 200 kg / m3 | 0.06-0.063 | ||
| Ua npuas ncauj, menyuam, 201 - 250 kg / m3 | 0.066-0.073 | ||
| Ua npuas ncauj iav, crumb, 251 - 400 kg / m3 | 0.085-0.1 | ||
| Npuas Kiav 100 - 120 kg / m3 | 0.043-0.045 | ||
| Ua npuas ncauj thaiv 121-170 kg / m3 | 0.05-0.062 | ||
| Npuas block 171 - 220 kg / m3 | 0.057-0.063 | ||
| Ua npuas ncauj flock 221 - 270 kg / m3 | 0.073 | ||
| Ekwata. | 0.037-0.042 | ||
| Polyurethane Feering (PPU) 40 kg / M3 | 0,029 | 0.031 | 0.05 |
| Polyurethane Ua Npuas Ncauj (PPU) 60 kg / m3 | 0.035 | 0.036 | 0.041 |
| Polyurethane Feder (PPU) 80 kg / m3 | 0.041 | 0.042. | 0.04. |
| Polyeneetylene stitched | 0.031-0.038 | ||
| Lub tshuab nqus tsev | |||
| Huab cua + 27 ° C. 1 ATM | 0,026. | ||
| Xenon | 0.0057 | ||
| Tus sib cav | 0.0177 | ||
| Aergel (Aspen Aerogels) | 0,014-0.021 | ||
| Shagkovat | 0.05 | ||
| Vermikulitis | 0.064-0.074 | ||
| Ua npuas ncauj roj hmab | 0.033 | ||
| Cork cov ntawv txheeb 220 kg / m3 | 0.035 | ||
| Cork cov ntawv 260 kg / m3 | 0.05 | ||
| Basalt Mats, Canvas | 0.03-0.04 | ||
| Rub | 0.05 | ||
| Perlite, 200 kg / m3 | 0.05 | ||
| Perlite khiav, 100 kg / m3 | 0.06. | ||
| Daim phiaj ntawm cov ntaub ntawv insulating, 250 kg / m3 | 0.054. | ||
| Polystyrevbeton, 150-500 kg / m3 | 0.052-0.145 | ||
| Granulated raj, 45 kg / m3 | 0.038 | ||
| Mineral Plug ntawm ib qho me ntsis, 270-350 kg / m3 | 0.076-0.096 | ||
| Pem Teb Cork txheej, 540 kg / m3 | 0,078. | ||
| Kev Cork, 50 kg / m3 | 0.037 |
Tshooj ntawm cov ncauj lus: Swan Hla Plooj qauv: Swan ob peb pub dawb, tus ntxhais dub rau lub pas dej, tus ntxhais thiab teeb tsa, prin
Ib feem ntawm cov ntaub ntawv raug coj los ntawm cov yam ntxwv ntawm cov yam ntxwv ntawm qee yam ntaub ntawv (SNIP 23-02-2003, SP 50.1330, SNIP3330, SNIP II-3-79 * (COV LUS QHIA NTXIV 2) (COV LUS QHIA Cov ntaub ntawv uas tsis tau sau tawm hauv cov qauv muaj nyob ntawm cov chaw tsim khoom lag luam. Vim tias tsis muaj cov qauv, cov chaw tsim khoom sib txawv tuaj yeem sib txawv qhov ntau, vim tias thaum yuav khoom, xyuam xim rau cov yam ntxwv ntawm txhua cov khoom yuav.
Cov lus ntawm thermal conductivity ntawm cov ntaub ntawv qub tsev
Phab ntsa, sib tshooj, pem teb, tuaj yeem tsim los ntawm cov khoom sib txawv, tab sis nws yog li ntawd nws tau muab tawm uas lub thermal conductivity ntawm cov ntaub ntawv tsim tsev feem ntau yog piv nrog Cib Masonry. Kuv paub cov khoom siv no txhua yam yog yooj yim rau cov koom haum nrog nws. Cov kab kos nrov tshaj plaws uas sib txawv ntawm cov khoom siv ntau yam qhia meej. Ib daim duab zoo li no yog nyob rau hauv kab lus dhau los, qhov thib ob yog qhov sib piv ntawm lub cib ntsa thiab phab ntsa ntawm cav - yog qhia hauv qab no. Tias yog vim li cas rau phab ntsa ntawm cib thiab lwm yam khoom siv siab thermal conductivity, thermal rwb thaiv tsev cov khoom yog xaiv. Txhawm rau kom nws yooj yim rau xaiv, cov thermal conductivity ntawm lub tsev cov ntaub ntawv tseem ceeb yog txo rau lub rooj.
Sib piv ntau cov ntaub ntawv
| Npe cov khoom siv, ntom | Coefficient ntawm thermal conductivity | ||
|---|---|---|---|
| Hauv kev mob qhuav | Nrog cov av noo | Nrog cov av noo | |
| CPR (Caas-Sandy daws) | 0.58. | 0.76 | 0.93 |
| Kua qaub-sandy daws | 0.47 | 0,7. | 0.81 |
| Plaster Plaster | 0.25. | ||
| Ua npuas ncauj ua npuas ua npuas, aerated qhob ntawm Maas, 600 kg / M3 | 0.14. | 0.22. | 0.26. |
| Ua npuas ncauj ua npuas ua npuas, aerated qhob ntawm Maas, 800 kg / M3 | 0.21 | 0.33 | 0.37 |
| Ua npuas ncauj ua npuas ua npuas, aerated qhob ntawm Meg, 1000 kg / M3 | 0.29. | 0.38. | 0.43 |
| Ua npuas ncauj ua npuas, ua ib tug neeg ua pob zeb ua ke, 600 kg / M3 | 0.15 | 0.28. | 0.34. |
| Ua npuas ncauj ua npuas, ua ib tug tub sab ua ke ua ke, 800 kg / m3 | 0.23. | 0.39 | 0.45 |
| Ua npuas ncauj ua npuas ua npuas, yog amateur aerated qhob, 1000 kg / m3 | 0.31 | 0.48. | 0.55 |
| Qhov rai iav | 0.76 | ||
| Kua txiv | 0.07-0.17 | ||
| Qhob nrog Ntuj Rubble, 2400 kg / M3 | 1,51 | ||
| Lub Hnav Tsho Nrog Cov Nates Pimes, 500-1200 kg / M3 | 0.15-0.44 | ||
| Qhob rau granular slags, 1200-1800 kg / m3 | 0.35-0.58 | ||
| Qhob rau lub boiler slag, 1400 kg / m3 | 0.56. | ||
| QHOB RAU Pob Zeb Crubbish, 2200-2500 Kg / M3 | 0.9-1.5 | ||
| Qhob rau roj slag, 1000-1800 kg / m3 | 0.3-0.7 | ||
| Ceramic thaiv khaws | 0,2 | ||
| Vermiculitobeton, 300-800 kg / m3 | 0.08-0.21 | ||
| Ceramzitobeton, 500 kg / m3 | 0.14. | ||
| Ceramizitobeton, 600 kg / M3 | 0.16. | ||
| Ceramzitobeton, 800 kg / M3 | 0.21 | ||
| Ceramzitobeton, 1000 kg / M3 | 0.27. | ||
| Ceramizitobeton, 1200 kg / M3 | 0.36. | ||
| Ceramzitobeton, 1400 kg / M3 | 0.47 | ||
| Ceramzitobeton, 1600 kg / M3 | 0.58. | ||
| Ceramzitobeton, 1800 kg / M3 | 0,66 | ||
| Tam sim no cov ceramic puv ntoob cib ntawm CPR | 0.56. | 0,7. | 0.81 |
| Masonry los ntawm Hollow Ceramic Crymick ntawm CPR, 1000 kg / M3) | 0.35 | 0.47 | 0.52. |
| Masonry los ntawm Hollow Ceramic Crymick ntawm CPR, 1300 kg / M3) | 0.41 | 0.52. | 0.58. |
| Masonry los ntawm Hollow Ceramic Crymick ntawm CPR, 1400 kg / M3) | 0.47 | 0.58. | 0.64 |
| Masonry los ntawm cov nplai puv-ntsuas cov qhob noom ntawm CPR, 1000 kg / M3) | 0,7. | 0.76 | 0.87 |
| Masonry los ntawm Hollow cov hlua khi ntawm CPR, 11 Voids | 0.64 | 0,7. | 0.81 |
| Masonry los ntawm Hollow cov hlua khi ntawm CPR, 14 Voids | 0.52. | 0.64 | 0.76 |
| Limestone 1400 kg / m3 | 0.49 | 0.56. | 0.58. |
| Limestone 1 + KG / M3 | 0.58. | 0.73 | 0.81 |
| Limestone 1800 kg / m3 | 0,7. | 0.93 | 1.05 |
| Limestone 2000 kg / m3 | 0.93 | 1,16 | 1.28. |
| Siv xuab zeb, 1600 kg / m3 | 0.35 | ||
| Zeb | 3,49. | ||
| Zeb | 2,91 | ||
| Ceramzit, gravel, 250 kg / m3 | 0.1. | 0.11 | 0.12. |
| Ceramzit, Gravel, 300 kg / m3 | 0.108. | 0.12. | 0.133. |
| Ceramzit, Gravel, 350 kg / M3 | 0.115-0.12 | 0.125 | 0.14. |
| Ceramzit, gravel, 400 kg / m3 | 0.12. | 0.133. | 0.145 |
| Ceramzit, Gravel, 450 kg / M3 | 0.133. | 0.14. | 0.155 |
| Ceramzit, gravel, 500 kg / m3 | 0.14. | 0.15 | 0.165 |
| Ceramzit, Gravel, 600 kg / M3 | 0.14. | 0.17 | 0.19. |
| Ceramzit, Gravel, 800 kg / M3 | 0.18. | ||
| Gypsum daim hlau, 1100 kg / m3 | 0.35 | 0.50 | 0.56. |
| Gypsum daim hlau, 1350 kg / m3 | 0.23. | 0.35 | 0.41 |
| Av nplaum, 1600-2900 kg / m3 | 0.7-0.9 | ||
| Av nkos Refractory, 1800 Kg / M3 | 1,4. | ||
| Ceramzit, 200-800 kg / m3 | 0.1-0,18 | ||
| Ceramzitobetone ntawm Quartz xuab zeb nrog piciation, 800-1200 kg / m3 | 0.23-0.41 | ||
| Ceramzitobeton, 500-1800 kg / m3 | 0.16-0,6,66. | ||
| Ceramzitobeton ntawm Perlite Sand, 800-1000 Kg / M3 | 0.22-0.28 | ||
| Cib Clinker, 1800 - 2000 kg / M3 | 0.8-0.16 | ||
| Ceramic ntsib Cib, 1800 kg / M3 | 0.93 | ||
| Teeb pw nruab nrab ntom ntom, 2000 kg / m3 | 1.35 | ||
| Cov ntawv txheeb ntawm plasterboard, 800 kg / m3 | 0.15 | 0.19. | 0.21 |
| Cov ntawv txheeb ntawm plasterboard, 1050 kg / m3 | 0.15 | 0.34. | 0.36. |
| Plywood Glued | 0.12. | 0.15 | 0.18. |
| DVP, Chipboard, 200 kg / m3 | 0.06. | 0.07 | 0.08. |
| DVP, Chipboard, 400 kg / m3 | 0.08. | 0.11 | 0.133. |
| DVP, Chipboard, 600 kg / M3 | 0.11 | 0.133. | 0.16. |
| DVP, Chipboard, 800 kg / M3 | 0.133. | 0.19. | 0.23. |
| DVP, Chipboard, 1000 kg / M3 | 0.15 | 0.23. | 0.29. |
| Linoleum PVC ntawm tshav kub insulating, 1600 kg / m3 | 0.33 | ||
| Linoleum PVC ntawm tshav kub insulating hauv paus, 1800 kg / m3 | 0.38. | ||
| Linoleum PVC ntawm cov ntaub so ntswg, 1400 kg / m3 | 0,2 | 0.29. | 0.29. |
| Linoleum PVC rau ntawm cov ntaub so ntswg, 1600 kg / m3 | 0.29. | 0.35 | 0.35 |
| Linoleum PVC ntawm cov ntaub, 1800 kg / M3 | 0.35 | ||
| Cov ntawv txheeb chaw ua si Asbetic tiaj, 1600-1800 kg / m3 | 0.23-0.35 | ||
| Ntaub pua plag, 630 kg / m3 | 0,2 | ||
| Polycarbonate (cov ntawv txheeb), 1200 kg / m3 | 0.16. | ||
| Polystyrevbeton, 200-500 kg / m3 | 0.075-0.085 | ||
| Chaw, 1000-1800 kg / M3 | 0.27-0,6,63 | ||
| Fiberglass, 1800 kg / m3 | 0.23. | ||
| Qhob pobzeb, 2100 kg / m3 | 1,1 | ||
| Ceramic Pobzeb, 1900 Kg / M3 | 0.85 | ||
| Pobzeb PVC, 2000 kg / M3 | 0.85 | ||
| Kua qaub plaster, 1600 kg / m3 | 0,7. | ||
| Stucco xas-xuab zeb, 1800 kg / m3 | 1,2 |
Tshooj ntawm cov ncauj lus: SIPHON rau lub tshuab ntxhua khaub ncaws: dab tsi zoo dua rau xaiv?
Ntoo yog ib qho ntawm cov ntaub ntawv hauv tsev nrog cov khoom siv hluav taws xob tsawg. Lub rooj muab cov ntaub ntawv piav qhia hauv cov pob zeb sib txawv. Thaum yuav, nco ntsoov pom qhov ntom ntom thiab coefficient ntawm thermal conductivity. Tsis yog txhua tus puav leej yog, raws li sau npe hauv cov ntaub ntawv kev cai.
| Lub npe | Coefficient ntawm thermal conductivity | ||
|---|---|---|---|
| Hauv kev mob qhuav | Nrog cov av noo | Nrog cov av noo | |
| Ntoo thuv, fir hla fibers | 0.09 | 0.14. | 0.18. |
| Ntoo thuv, spruce raws cov fibers | 0.18. | 0.29. | 0.35 |
| Oak nrog cov fibers | 0.23. | 0.35 | 0.41 |
| Oak thoob plaws fibers | 0.10. | 0.18. | 0.23. |
| Cork ntoo | 0.035 | ||
| Tus noog | 0.15 | ||
| Tsob ntoo liab | 0.095 | ||
| Ntuj Roj Hmab | 0.18. | ||
| Maple | 0.19. | ||
| Lipa (15% av noo) | 0.15 | ||
| Larch | 0.133. | ||
| Ci ntsa | 0.07-0.093 | ||
| Rub | 0.05 | ||
| Parquet ntoo qhib | 0.42. | ||
| Parquet daim | 0.23. | ||
| Parquet Packer | 0.17 | ||
| Lam | 0.1-0.26 | ||
| Lub lauj kaub poplar | 0.17 |
Cov hlau yog tau zoo heev nqa tawm cua sov. Lawv feem ntau tus choj ntawm txias hauv tus tsim. Thiab qhov no tseem tsim nyog yuav tau coj mus rau hauv tus account, tshem tawm ncaj qha rau kev siv cov khaubncaws sab nraud povtseg-insulating thiab gaskets, uas hu ua thermal sib txawv. Lub thermal conductivity ntawm cov hlau yog txo mus rau lwm lub rooj.
| Lub npe | Coefficient ntawm thermal conductivity | Lub npe | Coefficient ntawm thermal conductivity | |
|---|---|---|---|---|
| Tooj | 22-105 | Tooj dawb | 202-236 | |
| Tooj liab | 282-390. | Tooj daj | 97-111 | |
| Nyiaj | 429. | Liv | 92. | |
| Lub thoob | 67. | Hlau | 47. | |
| Kub | 318. |
Yuav ua li cas xam Phab Ntsa Thickness
Txhawm rau kom lub caij ntuj no hauv lub tsev muaj sov, thiab nyob rau hauv lub caij ntuj sov txias, nws yog qhov tsim nyog uas yuav tsum tau muab tso rau hauv cov txheej txheem (phab ntsa, vov tsev) yuav tsum muaj qee qhov thermal tsis kam. Rau txhua cheeb tsam, tus nqi no yog nws tus kheej. Nws nyob ntawm qhov nruab nrab kub thiab cov av noo hauv ib thaj chaw tshwj xeeb.
Thermal kuj tiv thaiv
Kev tsim kho rau cov cheeb tsam ntawm Russia
Txhawm rau cov nqi cua sov kom loj heev, nws yog qhov tsim nyog los xaiv cov ntaub ntawv hauv tsev thiab lawv cov tuab tuab kom lawv cov thermal tsis tsawg tshaj li teev nyob hauv lub rooj.
Tshooj ntawm cov ncauj lus: Xaiv cov khaub ncaws zoo tshaj plaws rau kev muab
Muab xam los ntawm cov tuab ntawm phab ntsa, qhov tuab ntawm cov rwb thaiv tsev, cov txheej tiav
Rau kev tsim kho niaj hnub, qhov xwm txheej yog tus yam ntxwv thaum lub phab ntsa muaj ntau txheej. Ntxiv rau cov qauv kev txhawb nqa, muaj rwb thaiv tsev, cov ntaub ntawv tiav. Txhua ntawm cov txheej muaj nws cov tuab. Yuav ua li cas txiav txim siab qhov tuab ntawm rwb thaiv tsev? Lub xam tau yooj yim. Ua kom tiav los ntawm cov qauv:
Cov mis rau suav ua hluav taws kub tsis kam
R yog thermal kuj;
p - txheej txheej tuab hauv meters;
K yog cov coefficient ntawm thermal conductivity.
Yav dhau los yuav tsum tau txiav txim siab txog cov khoom uas koj yuav siv thaum kev tsim kho. Ntxiv mus, nws yog ib qho tsim nyog los paub tseeb tias hom ntawv phab ntsa yuav yog rwb thaiv tsev, kho kom zoo nkauj, thiab lwm yam. Tom qab tag nrho, txhua ntawm lawv pab txhawb rau lub thermal rwb thaiv tsev, thiab cov thermal conductivity ntawm cov ntaub ntawv tsim tsev tau coj mus rau hauv kev suav.
Ua ntej, cov thermal tsis suav nrog cov khoom siv tau txiav txim siab (los ntawm tus ntsa, thiab lwm yam.) Yuav tau xaiv tsa "raws qhov chaw seem". Nws yog tseem muaj peev xwm coj mus rau hauv tus account lub thermal rwb thaiv tsev cov yam ntxwv ntawm cov ntaub ntawv tiav, tab sis feem ntau lawv yog "ntxiv rau lub ntsiab. Qhov no yog li cas ib qho khoom lag luam yog "nyob rau hauv rooj plaub". Cov ntaub ntawv no tso cai rau koj kom txuag tau rau cua sov, uas tom qab ntawd muaj qhov cuam tshuam zoo ntawm cov peev nyiaj.
Ib qho piv txwv ntawm kev suav nrog cov tuab ntawm lub rwb thaiv tsev
Peb yuav txheeb xyuas qhov piv txwv. Peb tab tom tsim phab ntsa ntawm cib - hauv ib nrab cib, peb yuav sov ntxhia ntaub plaub. Ntawm lub rooj, lub thermal kuj ntawm cov phab ntsa rau thaj av yuav tsum muaj tsawg kawg 3.5. Kev suav rau cov xwm txheej no yog qhia hauv qab no.
- Yuav pib nrog, peb laij cov thermal tsis kam ntawm lub cib ntsa. Ib nrab cib yog 38 cm lossis 0.38 meters, thermal conductivity coefficient ntawm Cib Masonry 0.56. Peb txiav txim siab nws raws li cov qauv saum toj no: 0.38 / 0.56 = 0.68. Xws li cov thermal kuj muaj ib lub phab ntsa ntawm 1.5 cib.
- Tus nqi no tab tom noj ntawm cov thermal dav dav tiv thaiv rau thaj av: 3,5-0.68 = 2.82. Qhov no feem ntau yuav tsum tau "yug me nyuam" nrog rwb thaiv tsev thermal thiab cov ntaub ntawv tiav.
Txhua qhov kev sib raug zoo hauv cov qauv yuav tau suav
- Peb xav txog qhov tuab ntawm cov ntxhia cov ntaub plaub. Nws cov thermal conductivity coefficent yog 0.045. Cov txheej thickness yuav yog: 2.82 * 0.045 = 0.1269 m lossis 12.7 cm. Qhov no yog, kom ntseeg tau tias cov theem ua kom huv si yuav tsum yog tsawg kawg 13 cm.
Yog tias cov peev nyiaj tau txwv, cov ntaub plaub pob zeb hauv av tuaj yeem ua ntej 10 cm, thiab cov ntaub ntawv uas ploj lawm. Tom qab tag nrho, lawv yuav yog sab hauv thiab sab nraud. Tab sis, yog tias koj xav tau tus account rau cov cua sov kom tsawg, nws yog qhov zoo dua los ua kom tiav "ntxiv rau tus nqi sib hais. Qhov no yog koj qhov tsuas yog thaum lub sijhawm qis tshaj plaws, vim tias cov qauv ntsuas kub tau txiav txim siab nyob rau nruab nrab ntawm qhov kub thiab txias rau ntau xyoo, thiab lub caij ntuj no yog mob khaub thuas. Yog li ntawd, cov thermal conductivity ntawm cov ntaub ntawv tsim tsev siv rau kev ua tiav yog tsis suav rau hauv tus account.