df,n, ,
,
d'f - , , 24847;
Tf,m tf,m - , , , , 131.13330;
Tf tf - , , , , , .
df,n, , :
, (4.9)
q 2 , , ∙/3, /3, /3.
q 2 = Ln 0,5 Cf (Tf,m Tbf), (4.10)
Ln , × /3, /3, /3, 3.26 = 0,5(Tf,m Tbf), .
, , , , (4.4) (4.9) , :
.... | 0,04 |
" ( )....... | 0,07 |
" ..................... | 0,10 |
" ⅅ... | wp + 0,5 Ip |
" ........... | 1,1 wp, |
Ip wp .
. . . th,m =10,1ºC. tth,m =2920 . , wtot =0,3 ..; ww= 0,08 .., rd= 1400 /3. λth = 1,45 /(º), λf = 1,57 /(º); th= 835 /(3º), f= 603/(3 º). T0= 2ºC, Tbf = 0,2ºC. .
Tth,c = 1,4 Tth,m + 2,4 C :
th, =1,410,1+2,4 =16,5ºC.
4.7:
.
:
|
|
tth, =1,15 tth,m + 0,1 t1 =1,152920+0,13600=3718 .
, 603/(3º), . 4.5 km 4,5.
( ) 3.26:
Ln = L 0(wtot ww) rd =93(0,30,08)1400 = 28644 /3.
4.5 Q:
4.6 q1:
4.4:
. . . , 131.13330, Tf,m =-6,6º. tf,m= 3500 . , wtot =0,07, ww= 0. rd =1600 /3. Tbf= 0º C. λf= 1,62/(º); f= 489/(3º).
3.26 ( )
Ln = L 0(wtot ww) rd =93(0,070)1600 = 10416 /3.
(4.10)
q 2 = 10416,0 0,5489,0(-6,6-0,0)=12029,7 /3.
df,n, , 4.9: