Total head available to the system of zone 1 direct proportional head
100
90
80
70
60
Y1
50
40
A
30
20
10
10
0
0
0
200
Key:
X1 = Flow rate (l/h)
Y1 = Head (kPa)
Y2 = Circulator pump absorbed power (W)
Total head available to the system of zone 1 direct constant head
100
90
80
A
70
60
Y1
50
40
30
20
10
10
0
0
0
200
Key:
X1 = Flow rate (l/h)
Y1 = Head (kPa)
Y2 = Circulator pump absorbed power (W)
80
400
600
800
1000
1200
MAX
400
600
800
1000
1200
MAX
B
1400
1600
1800
2000
2200
X1
A = Total head available
B = Power absorbed by the system pump (dotted area)
MAX
B
1400
1600
1800
2000
2200
X1
A = Total head available
B = Power absorbed by the system pump (dotted area)
100
90
80
70
60
Y2
50
40
30
20
10
10
0
2400
2600
2800
3000
100
90
80
70
60
Y2
50
40
30
20
10
10
0
2400
2600
2800
3000
36
37