9 / 20
HYSS - HYBRID SOLAR SYSTEM
9
Percentage increase in the COP of the heat pump as a function of brine temperature
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0
2
4
6
8
10
12 14
16
18 20
22
24
26
28
30 32
The accredited measurements have
been carried out according to EN14511
by the Danish Technological Institute
using the Free Energy heat pump
model FE04.
When the solar panels increase the temperature of the
incoming brine by, for example, 10 °C, the heat pump
causes an increase in the COP for underfloor heating of 36%
and an increase of 24% for radiator-borne heating.
Brine temperature (°C)
Underfloor heating Radiator system
36%
24%
53%
99%
98%
Solar heating increases the efficiency of the heat pump
Annual saving as a function of the number of solar panels
29 000
27 000
25 000
23 000
21 000
19 000
17 000
15 000
0
1
2
3
4
5
6
7
8
9
10
11
12
13
Number of solar panels
Annual saving
Annual saving vs Number of solar panels
Example calculation, HYSS replaces an oil-fired burner:
• Detached house in Oslo with a floor area of 200 m2
• South-facing roof, pitch 30°, underfloor heating
• Annual heating requirement of 3,000 litres of oil (30,000 kWh)
• Of this, hot tap water accounts for 6,000 kWh (20% of
the annual requirement)
This halves the pay-back time for the solar panels in combination with HYSS, since solar heating is used both for hot tap water and to increase the efficiency of the heat pump.