1_ higrotermic _rezist camp curent

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II. Thermal insulation design for the envelop elements( Proiectarea higrotermic a anvelopei cldirii)

The equation used for the thermal resistance estimation in the hypothesis of one direction thermal flux is:

ek

k

i

ekiefo

dRRRR

11, ++=++= [m2K/W] (1)

Atentie:

Dincondiiadeeconomiedeenergie:

R0,ef Rmin

Incare:

Rmin rezistentatermicaminimanormata,

Rmin=(1,21,3)Rmin

cu Rminvaloareaminim normat a rezistenei termicemedii corectateantreguluielementdeconstruciedinanvelop,peansamblulcldirii.

Observatii:Deoarece intabeleledemaijossedauvalorileminimealerezistentelormediicorectatepetipuride

elemente si ansamblul cldirii, pentru predimensionarea termoizolaiei vom considera ca punile

termiceaferenteelementelordeconstruciereducrezistenetermicadincmpcurentcu20%...30%.


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Thermal characteristics of the materials used in the construction of the envelope:

Nr. Material

Density

Thermalconductivity

Thermalreceptivity

Sm

Vapourpermeabilityresistance

1/KDKg/m W/(mk) W/(m

2k) -

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 3,910 Gravel infilling 1800 0,70 8,74 2,411 Aerated concrete (b.c.a.)

masonry with slim joints

675 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 -


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REZISTENTELE TERMI CE ALE STRATURILOR DE AER

NEVENTILATE

Grosimea

stratului de aer

Directia si sensul fluxului termic

OrizontalVertical

Ascendent descendent

0 0,00 0,00 0,00

5 0,11 0,11 0,11

7 0,13 0,13 0,13

10 0,15 0,15 0,15

15 0,17 0,16 0,17

25 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:Pentruvaloriintermediareseinterpoleaz liniar


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1. External walls type I (cross shear wall):

ek

k

i

ekiefo

dRRRR

11, ++=++=

i=8, e=23

Nr. MaterialLayer

ThicknessTherm.conduct.

Therm.asim.factor

Heatloss resist.

Vapourconductiv.

d Sm R 1/KD(m) (W/mK) (W/m2K) (m2K/W) -

1/i

1Internal Cement / limeplaster

2 Reinforced concrete

3Polystyrene / mineralwool/ polyurethane X

4 External plaster

1/e

Total on element R=

External walls: type II

Nr. MaterialLayer

ThicknessTherm.conduct.

Therm.asim.factor

Heatloss

resist.

Vapourconductiv.

d Sm R 1/KD(m) (W/mK) (W/m2K) (m2K/W) -

1/i

1Internal Cement / limeplaster

2 Brick masonry

3Polystyrene / mineralwool/ polyurethane X

4 External plaster

1/e

Total on element R=


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2. Top floor (terrace roof) :

1- waterproof membraneprotection (mortar 3 cm+gravel or concreteboards);2 waterproof

membrane;3 diffusive layer;4 waterproofmembrane support(mortar 3 cm);5 plistyrene termo-insulation 20 cm;6 vapor barrier;7 diffusion layer;8 sloping layer (b.c.a.)8 cm;9 reinforced concretefloor slab 1215 cm;10 ceiling plaster - 1,5cm;

3. Floor over the basement:

floor over basement:

1- ceiling plaster - 1,5 cm;2- thermal insulation of mineralwool 10 cm;3- reinforced concrete floor slab 1215 cm;

4- mortar bead 3 cm5 Ceramic floor tile 1.2 cm

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