Civil Engineering Reference
In-Depth Information
Table 2 Cost breakdown and cost payback time (Tripanagnostopoulos et al.
2005
)
a
System cost 30 m
2
installation cost
payback time (CPBT)
Cost of
PV ? HRU ? REF
(€)
Cost of
electrical ? terminal
(€)
Installation
cost (€)
Total
cost (€)
CPBT for electricity
saving (in yr)
CPBT for electricity and
gas saving (in yr)
PV
21,000
1,500
1,500
24,000
25.8
25.8
PV ? REF
22,500
1,500
1,500
25,500
22.9
24.1
PY-TILT
21,000
1,500
900
23,400
28.2
26.9
PVT/TJNGL-25 C
24,000
4,500
1,500
30,000
11.9
18.1
PVT/UNGL-35 C
‡
‡
‡
‡
18.7
23.8
PVT/UNGL-45 C
C
C
C
C
28.1
29.6
PVT/UNGL ? REF-25 C
25,500
4,500
1,500
31,500
11.1
17.2
PV T/UNGL ? REF-35 C
C
C
C
C
17.0
22.3
PVT/UNGL ? REF-45 C
C
C
C
C
25.5
28 1
PVT/GL-25 C
27,000
4,500
1,500
33,000
10.5
17.6
PVT/GL-35 C
C
C
C
C
14.5
21 9
PVT/GL-45 C
C
C
C
C
21.2
27.9
PVT/GL ? REF-25 C
28,500
4,500
1,500
34,500
10.3
17 2
PVT/GL ? REF-35 C
C
C
C
C
13.9
21 1
PVT/GL ? REF-45 C
C
C
C
C
19.8
26.3
PVT/UNGL-TILT-25 C
24,000
4,500
900
29,400
11 8
18.2
PVT/UNGL-TILT-35 C
C
C
C
C
18.5
24.2
PVT/UNGL-TILT-45 C
C
C
C
C
28.2
30.8
PVT/GL-TILT-25 C
27,000
4,500
900
32,400
10.5
17.9
PVT/GL-TILT-35 C
C
C
C
C
14.2
22 1
PVT/GL-TILT-45 C
C
C
C
C
20.7
28.2
a
Note HRU heat recovery unit; UNGL unglazed; GL glazed; REF stationary flat diffuse reflectors; TILT tilted installation
