Solar System Design Guide
6020 457 - 01
74
Pressure Drop of Vitosol 200-FM, Type SV and SH
Relative to water, corresponds to Tyfocor HTL at
approximately 140°C (60°C).
Collector Pressure Drops for Vitosol 200-FM SV2F & SH2F
Note:
For multiple Vitosol 200-FM collectors installed in
a single array, use the flow rate per individual
collector to calculate the pressure drop.
Note:
Maximum of 10x Vitosol 200-FM can be connected in one array, having single-sided connections.
Maximum of 12x Vitosol 200-FM can be connected in one array, having alternate side connections (reverse return).
Specific Flow Rate
Low Flow
High Flow
USG/min/ft
2
0.0102
0.0123
0.0143
0.0164
0.0184
0.0205
0.0225
0.0245
(L/h/m
2
)
(25)
(30)
(35)
(40)
(45)
(50)
(55)
(60)
USG/min
0.26
0.31
0.36
0.41
0.46
0.51
0.56
0.62
(L/min)
(1.0)
(1.2)
(1.4)
(1.6)
(1.7)
(1.9)
(2.1)
(2.3)
Resulting Pressure Drop for Vitosol FM, Type SV and SH for collector arrays consisting of
1 to 12 collectors (connected in parallel)
"w.c.
29
39
49
60
72
86
100
116
ft/hd
2.4
3.2
4.1
5.0
6.0
7.1
8.3
9.6
(mbar)
(73)
(96)
(121)
(149)
(180)
(213)
(249)
(288)
(kPa)
(7)
(10)
(12)
(15)
(18)
(21)
(25)
(29)
Design and Operation
Example:
3x Vitosol 200-FM collectors having a target flow
rate of 0.018 USG/min/ft
2
(45 L/h/m
2
):
3 x 25 ft
2
x 0.0184 USG/min/ft
2
= 1.4 USG/min
(3 x 2.32 m
2
x 45 L/h/m
2
÷60 min = 5.2 L/min)
Since the flow rate stated above is for the entire array,
this value will need to be adjusted to account for the
flow through each individual collector:
1.4 USG/min / 3 collectors = 0.46 USG/min/collector
(5.2 L/min / 3 collectors = 1.74 L/min/collector)
Using the pressure drop table on the left side of this page
draw a vertical line at the required flow rate per collector.
Draw a horizontal line at the point where the vertical
line intersects the collector pressure drop curve. This will
identify the collector pressure drop across the entire
array (indicated by the grey lines on the pressure drop
chart). For this example the resulting pressure drop will be
approximately: 165 mbar (66 “w.c.).
0.46 USG/min
1.74 L/min
Total Flow Rate
1.4 USG/min (5.2 L/min)
0.46 USG/min
1.74 L/min
0.46 USG/min
1.74 L/min