integration of solid oxide fuel cells and ... - Ea Energianalyse

2. MARKET INVESTIGATION
16000
14000
Pay Back Time: Entire System (SOFC+ABS)
SOFC Price [DKK/kW]
12000
10000
8000
6000
4000
2000
0
Normal Climate
Hot Climate
0 1 2 3 4 5
Time [years]
Figure 2.5: The x-axis shows the pay back time for a system consisting of a SOFC + ABS +
Hot water heating compared to pure electricity import from the electrical grid + electrical air
conditioner. The varied parameter (y-axis) is the purchase price of the SOFC.
Pay Back time for the ABS unit (case B vs case C)
From figure 2.6 it can be seen how long it takes for the ABS unit to repay
itself. As expected the pay back time is much shorter for the hot climate
than for the normal climate. This is mainly because the number of full
load hours for the ABS is much bigger for the hot climate, where it runs
all year, so more electricity is saved. With the current prices for the ABS
of just below 4000Dkk/kW the pay back time is 1,5 years and 4 years for
the hot and normal climate respectively. It is seen, however, that the pay
back time is fairly sensitive to the purchase price of the ABS. And if the
purchase price goes below approximately 2000DKK/kW the ABS unit
becomes profitable from day one since this is the same as an electrical air
conditioner would cost.
34