--
- -
25-
-1.
, -1 . 0.3; 0.6; 1.0 . () S, *;
, cos j,
cos j =162.5/186.44=0.87
P cos j, 0,9. , c os j 0,9, . , , :
= (1.76* 300)/(1+(1.57*0.015)/0.87)=279.4
, .
:
=162,5
Q =91,4
S=
S=(162,52+91,42)1/2=186,44 *
=162,5/300=0,54
P .
:
h =0,8*0,82/0,82=0,8
h I, ,
I =162,5/(0,8*24)=8,46
U ,(24 ).
2
3 24
.
:
1. ( I 0,262 );
2. , , .( I 0,432 );
3. , .. ( I 0,175 );
4.
( I
0,090 );
5. -1
.
, ,
I=Inc+In+I+I+I
nc ;
n .
I=0.262*100+0.090*3+0.432+0.175+8,46=35,537
t (2 ) .
|
|
I=I-In
I=35,537-0,262*100=9,337
12 t 24 10 .
Q=It+It
Q=35,537*2+9,337*10=164,444 *
Q, , :
Q=Q/Kc*(1+Kt*(t-25))
Q ;
( 0,85)
- (=0,82);
t ( 0,008)
t0 ( +15)
t I
t=Q/I
t=164,444/35,537=4,62 .
Q - Q
N=Qn/Q1
N=288/36=8
Q1 1 ( 36 *). -8 Q= 288 *.