blob: 6af5efa36b9f08b3c5d1ffdd9adf4ccd344a1fa0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
clc
disp("(i) Mass of spray water required")
//At 22 0c
p_vs=0.0264; //bar
phi_3=0.55;
p_t=1.0132; //bar
p_v3=phi_3*p_vs;
W3=0.622*p_v3/(p_t-p_v3);
//At 3 0C
p_vs1=0.0076; //bar
p_v1=p_vs1;
W1=0.622*p_v1/(p_t-p_v1);
R=287;
T_3=295; //K
v=R*T_3/(p_t-p_v3)/10^5;
m=(W3-W1)/v;
disp(" Mass of spray water required=")
disp(m)
disp("kg moisture/m^3")
disp("(ii) Temperature to which the air must be heated")
t_dp=12.5; //0C
cp=1.005;
t_db3=22; //0C
h_g3=2524; //kJ/kg
h_vapour3=h_g3 + 1.88*(t_db3 - t_dp);
W2=0.0047;
h_g2=2524; //kJ/kg
h4=41.87;
t_db2=(cp*t_db3 + W3*h_vapour3 -W2*h_g2 + 1.88*W2*t_dp - (W3-W2)*h4)/(cp-W2*1.88);
disp("t_db2=")
disp(t_db2)
disp("0C")
|
