The analysis is mainly done by taking out one reference case after a series of single point evaluations. As there was a striving towards a high solar fraction the reference case with the actual auxiliary fuel cost is not the minimum average annual cost which is depicted in Figure 7.
The reference case is:
|
• |
collector area |
20,000m2 |
||
|
• |
collector cost |
247US$/m2 |
||
|
• |
storage volume |
100,000m3 |
||
|
• |
storage cost |
27US$/m3 |
||
|
• |
auxiliary fuel cost |
0.05US$/KWh |
||
|
• |
weather |
Boston |
||
|
which |
had results: |
|||
|
• |
total annual cost |
1.45M$ |
||
|
• |
solar fraction |
97.1% |
||
|
Usi |
ng |
the MINSUN graphing function |
sensitivity analyses |
|
|
the |
reference case by varying the |
following parameters: |
||
|
• |
collector area |
5-35,000m2 |
||
|
• |
collector cost |
175US$/m2 |
||
|
• |
storage volume 20-140,000m3 |
|||
|
• |
storage cost |
20US$/m3 |
||
|
• |
auxiliary fuel cost |
0.1US$/KWh |
||
|
• |
weather |
Madison, Copenhagen |
||
|
The |
results |
are displayed in terms |
of: |
|
|
• |
total annual cost |
|||
|
• |
solar fraction |
