E x a m i n i n g C o s t – E f f e c t i v e n e s s o f P V / T M V H R S y s t e m s
633
Table 8: Future worth and cost-effectiveness assessment results of combination alternatives with
option 4 as the bench mark
Conclusions
Today, solar photovoltaic (PV) systems installed in Scottish houses are mainly applied
for the supply of electricity alone even if PV actually generates not only electricity but
also heat which can be used for space heating. Studies about PV thermal (PV/T)
residential applications are far from new; however, there had been no practical guideline
that Scottish housing suppliers today can follow for installation of the theoretical heating
device. Accordingly, this study was initiated with the aim to identify how PV/T systems
can perform under Scottish climate conditions and how the technology can practically be
applied to a housing unit. There is a synergy between MVHR and PV/T systems. PV
generated electricity can contribute to the operation of an MVHR system while the
ventilator can help extract fresh air heated by PV. The combination helps create healthy
comfortable living environment while the total energy load for space heating could be
reduced. This study articulated the significance of the hybrid application and the
economic value of PV generated heat, which had been ignored in most PV practices in
Combi-
nations
Future
worth
(10yrs)
(-ve is
saving)
Cost-
effective-
ness
(%)
Opt1
1328
-800
Opt2
1159
-698
Opt3
197
-119
Opt4
-166
100
Opt5
1224
-738
Opt6
246
-148
Opt7
-54
33
Opt8
1258
-758
Opt9
283
-170
Opt10
-93
56
Opt11
1403
-845
Opt12
428
-258
Opt13
127
-77
Opt14
1305
-786
Opt15
329
-198
Opt16
-109
66
Opt17
1320
-795
Opt18
345
-208
Opt19
-137
83
SAP ASSESSMENT RESULTS
