1_ Calculul Higrotermic Termice Anvelopa_rezistente Camp Curent_2010
-
Upload
marian-pruteanu -
Category
Documents
-
view
28 -
download
4
description
Transcript of 1_ Calculul Higrotermic Termice Anvelopa_rezistente Camp Curent_2010
II. Thermal insulation design for the envelop elements ( Proiectarea higrotermică a anvelopei clădirii)
The equation used for the thermal resistance estimation in the hypothesis of one direction thermal flux is:
[m2K/W] (1)
Atentie:Din condiţia de economie de energie:
1. R0,ef Rmin (3)
In care :R’min - rezistenta termica minima normata,Rmin =(1,2 … 1,3)Rmin
cu Rmin – valoarea minimă normată a rezistenţei termice medii corectate a întregului element de construcţie din anvelopă, pe ansamblul clădirii.
Observatii:Deoarece in tabelele de mai jos se dau valorile minime ale rezistentelor medii corectate pe tipuri de elemente si ansamblul clădirii, pentru predimensionarea termoizolaţiei vom considera ca punţile termice aferente elementelor de construcţie reduc rezistenţe termica din câmp curent cu 20%...30%.
Thermal characteristics of the materials used in the construction of the envelope:
Nr. Material
Density
Thermal conductivity
Thermal receptivity
Sm
Vapour permeability resistance
1/KD
Kg/m3 W/(mk) W/(m2k) -0 1 2 3 4 51 Reinforced concrete 2500 1,74 16,25 21,632 Reinforced concrete 2400 1,62 15,36 21,33 Cement/lime plaster 1700 0,87 4,47 8,54 Plaster over insulation 1200 0.52 3.15 4.75 Mineral wool 100/130 0,048 0,50 1,36 Polystyrene 20 0,044 0,29 30,07 Cardboard plaster 700 0,23 3,13 3,48 Sand infilling 1600 0,58 7,50 3,9
10 Gravel infilling 1800 0,70 8,74 2,411 Aerated concrete (b.c.a.)
masonry with slim joints675 0,27 3,38 3,8
12 Aerated concrete strips 625 0,25 3,13 3,713 Fir timber 550 0,17 4,12 10,414 Oak and beech timber 800 0,23 5,78 11,315 PFL board 300 0,07 1,95 2,716 Bituminous cardboard 600 0,17 3,28 -
REZISTENTELE TERMICE ALE STRATURILOR DE AER
NEVENTILATE
Grosimea stratului de aer
Directia si sensul fluxului termic
OrizontalVertical
Ascendent descendent0 0,00 0,00 0,005 0,11 0,11 0,117 0,13 0,13 0,1310 0,15 0,15 0,15
15 0,17 0,16 0,1725 0,18 0,16 0,19
50 0,18 0,16 0,21100 0,18 0,16 0,22
300 0,18 0,16 0,23
OBSERVATIE: Pentru valori intermediare se interpolează liniar
Surface heat loss factors: i and e:
Working condition factor:
1. External walls type I (cross shear wall):
i=8, e=23
Nr. Material Layer Thickness
Therm. conduct.
Therm. asim. factor
Heat loss resist.
Vapour conductiv.
d Sm R 1/KD
(m) (W/mK) (W/m2K) (m2K/W) -1/i
1Internal Cement / lime plaster
2 Reinforced concrete
3Polystyrene / mineral wool/ polyurethane X
4 External plaster
1/e
Total on element R=
External walls: type II
Nr. Material Layer Thickness
Therm. conduct.
Therm.asim. factor
Heat loss
resist.
Vapour conductiv.
d Sm R 1/KD
(m) (W/mK) (W/m2K) (m2K/W) -1/i
1Internal Cement / lime plaster
2 Brick masonry
3Polystyrene / mineral wool/ polyurethane X
4 External plaster
1/e
Total on element R=
2. Top floor (terrace roof) :
1- waterproof membrane protection (mortar 3 cm + gravel or concrete boards); 2 – waterproof membrane; 3 –diffusive layer; 4 – waterproof membrane support (mortar 3 cm); 5 – plistyrene termo-insulation 20 cm; 6 – diffusion layer;7 –vapor barrier;8 – sloping layer (b.c.a.) 8 cm; 9 – reinforced concrete floor slab – 12…15 cm; 10 – ceiling plaster - 1,5 cm;
3. Floor over the basement:
floor over basement:1- ceiling plaster - 1,5 cm;2- thermal insulation of mineral wool – 10 cm; 3- reinforced concrete floor slab – 12…15 cm;4- mortar bead – 3 cm5 – Ceramic floor tile – 1.2 cm
Adrese utile: <http://www.wienerberger.ro/servlet/Satellite?pagename=Wienerberger/Page/List05&c=Page&cid=1139915658675&sl=wb_ro_home_ro > , < http://www.brikston.ro/produse/>, <http://www.metaleinternational.ro/index.php?pag_index=9&id=307>,<http://www.elpreco.ro/download/zidarie/Fisa_tehnica_BCA_zidarie.pdf>,< http://www.elpreco.ro/download/zidarie/Catalog_sistem_zidarie_cu_rosturi_subtiri_-_ %20BCA.pdf
11