System Efficiency; Technical Issues - Fondital Sulpack Natural Plus 150 Manual De Instalación, Uso Y Mantenimiento

8. System efficiency

Several examples of product efficiency are shown below based on the model, the energy requirements (Qd), and the domestic
hot water consumption.
Model
Water consumption
Stockholm 59.6°
Würzburg 49.5°
Davos 46.8°
Athens 38.0°
Model
Water consumption
Stockholm 59.6°
Würzburg 49.5°
Davos 46.8°
Athens 38.0°
Model
Water consumption
Stockholm 59.6°
Würzburg 49.5°
Davos 46.8°
Athens 38.0°
Qd: Energy required (MJ)
QL: Energy provided by the system
Fsol: System efficiency (Fsol = QL/Qd (%))

9. Technical issues

PROBLEM
Poor system efficiency.
Leaks from the 6 bar safety valve.
54
Qd QL fsol
110 l/day
6150 2976 48.4
5897 3037 51.5
6654 4358 65.5
4573 3731 81.6
Qd QL fsol
140 l/day
7821 3316 42.4
7506 3468 46.2
8483 4793 56.5
5834 4381 75.1
Qd QL fsol
250 l/day
13939 6760 48.5
13371 6940 51.9
15137 9915 65.5
10406 8481 81.5
(MJ)
POSSIBLE CAUSE
Low amount of solar liquid.
Leaks from pipe connections.
Solar collector dirty.
High delivery pressure.
150
Qd QL fsol
140 l/day
7821 3386 43.3
7506 3543 47.2
8483 4954 58.4
5834 4451 76.3
200
Qd QL fsol
170 l/day
9492 3626 38.2
9114 3855 42.3
10281 5223 50.8
7064 4980 70.5
300
Qd QL fsol
300 l/day
16746 7335 43.8
16052 7641 47.6
18165 10645 58.6
12488 9529 76.3
SOLUTION
Top up the system with solar fluid.
Tighten the connections between the
pipes.
Clean the solar collector.
Install a pressure reducer.
Qd QL fsol
170 l/day
9492 3664 38.6
9114 3892 42.7
10281 5315 51.7
7064 5015 71.0
Qd QL fsol
200 l/day
11164 3851 34.5
10691 4105 38.4
12110 5522 45.6
8326 5503 66.1
Qd QL fsol
400 l/day
22327 7882 35.3
21413 8330 38.9
24220 11238 46.4
16651 12073 72.5