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

2. MARKET INVESTIGATION
Annuity price [DKK/y]
4'000'000
3'500'000
3'000'000
2'500'000
2'000'000
1'500'000
1'000'000
500'000
HOT climate.
Annual price for all energy equipment + gas and electricity use
Annuity_5
Annuity_10
Annuity_15
Annuity price [DKK/y]
4'000'000
3'500'000
3'000'000
2'500'000
2'000'000
1'500'000
1'000'000
500'000
Normal climate.
Annual price for all energy equipment + gas and electricity use
Annuity_5
Annuity_10
Annuity_15
0
EL SOFC+WH SOFC+WH+ABS
0
EL SOFC+WH SOFC+WH+ABS
Figure 2.7: The annuity (yearly cost) is examined for an expected lifespan of the SOFC, ABS,
and ECH unit of 5, 10, and 15 years respectively. A: Hot climate. B:Normal climate.
SOFC+ABS does not depend so much on their lifetime because the
purchase price of the SOFC and ABS unit is quite small relative to the
yearly cost of natural gas and electricity. The SOFC cost is approximately
equal to the yearly savings in fuel (1,0 to 1,2 mil. DKK). The cost of the
ABS unit is around 1mil. DKK, but at the same time the price of the
supplementary air conditioning unit decreases from 1,4mil. DKK to 0,9
mil. DKK. 16
Sensitivity analysis
Since there are three setups (A, B and C), all in both hot and normal
climate, a sensitivity analysis could be made for a lot of different setups.
Here it has however been chosen to look only at case B vs C for the
hot climate. I.e. the investigated parameter is the Net Present Value
of the difference in cost between using a SOFC system with an ABS air
conditioner vs a SOFC system with a normal electrical air conditioner.
16 The reason that the annuity of the case with pure electricity import from the grid
(left bars) changes with the component lifetime is that it has been assumed that the ECH
has the same lifetime as the ABS and SOFC unit (either 5, 10 or 15 years). Their lifetime
could have been changed individually, but this would generate even more graphs.
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