. ( ).
, Rreq, 2/, 4 [3] - Dd, ѷ.
- Dd, ѷ,
, (1.1)
tint , , +20;
tht, zht , , , , , 8 .
Dd = (20 - (-8.3))×231 = 6537ѷ.
Rreq Dd, ,
Rreq = aDd + b, (1.2)
Dd - , ѷ, ;
a, b , 4 [3] , a=0.00035, b=1.4.
Rreq =0.00035×6537+1.4=3.69 2/.
R, 2/, :
R= , (1.3)
- , ;
- , ()/, .
:
- Alutech;
- ;
- ROCKWOOL Ļ = 0.035;
- = 0.7 ()/, d = 250 ;
- - λ = 0.76 ()/, d = 20 .
R ()/, :
, (1.4)
- , /2, . 7 [3], =8.7 ()/;
R , 2/, :
R=R1+R2+ R.., (1.5)
R1, R2, R3 ;
R.. ;
- ( )
, /2, . 6* [3], =23 ()/.
1.1
R1 = 0.25/0.7 = 0.357 ()/.
R2=0.02/0.76=0.026 ()/.
R..=0.18 ()/.
1.6:
X = λ(Rreq -1/α-R-1∕α), (1.6)
X =0.035∙(3.69-1/8.7-0.357-0.026-0.18-1/23) ≈ 0.104 .
110 .
R= + 0.357 + 0.026 + 0.18+0.11/0.035+ = 3.86 ()/.