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--- mission:tech:odyssey [2014-12-22 11:49] – [Energy] chrono
+++ mission:tech:odyssey [2016-08-09 19:17] (current) – Updated VFCC links chrono
@@ Line 47: / Line 47: @@
 ==== Solar ====
-Since solar power is the primary energy source of the Odyssey, the primary design considerations have been efficiency and reliability. The biggest challenge was to find solar panels with at least 20% efficiency that actually would physically fit on the constrained roof space of the Odyssey. After a long and thorough market analysis, the following components have been selected, matched and obtained to supply the Odyssey with solar energy.
+Since solar power is the primary energy source of the Odyssey, the primary design considerations have been efficiency and reliability. Although there seem to be [[https://apollo.open-resource.org/mission:log:2014:11:28:using-nanopatterns-from-blu-ray-discs-to-boost-pv-solar-conversion-efficiency|advances in solar technology]], biggest challenge was to find solar panels with at least 20% conversion efficiency that actually would physically fit on the constrained roof space of the Odyssey. After a long and thorough market analysis, the following components have been selected and obtained to supply the Odyssey with solar energy.
 === Panels ===
@@ Line 56: / Line 56: @@
 ^ Parameter ^ Single Panel ^ Combined ^
-| Nominal Peak Power @ 1kW/m² RSO (25°C) | 110 Wp | 330 Wp |
+| Nominal Peak Power @ 1 kW/m² RSO (25°C) | 110 Wp | 330 Wp |
 | Efficiency | 20% ||
 | Short-circuit current| 6.1 A | 18.3 A |
@@ Line 68: / Line 68: @@
 ** Calculations & Simulation **
-The panel's surface is a little bit larger than the actual cell surface. The following calculations were based on a combined photo-active area of 1404x1404 mm, by measuring and multiplying the size of a single cell.
+The panel's surface is a little bit larger than the actual cell surface. The following calculations were based on a combined photo-active area of about 1.825 m², by measuring and multiplying the size of a single cell.
-<x 14>1404*1404 = 1.971 m²</x>
+<x 14>0.13*0.13*108 = 1.825 m²</x>
-Assuming a maximum of 800W of energy per m<sup>2</sup> delivered by the sun on the planet's surface, the Odyssey's available combined photo-active roof surface (1.971 m²) can theoretically receive a maximum of 1577 W<sub>p</sub> (Watt Peak), in peak sunlight:
+Assuming a maximum of 1000W of energy per m<sup>2</sup> delivered by the sun on the planet's surface, the Odyssey's available combined photo-active roof surface (1.825 m²) can theoretically receive a maximum of 1825 W<sub>p</sub> (Watt Peak), in peak sunlight:
-<x 14>1.971*800=1577 Wp</x>
+<x 14>1.825*1000=1825 Wp</x>
-In peak sunlight, the Odyssey will receive about 1.5 kW of solar energy on all cells. The conversion efficiency for these modules is rated at 20% by the manufacturer. Knowing that, it's possible to calculate the maximum amount of power the Odyssey can harvest with her finite roof-space at 20% module efficiency. Of course, the cell efficiency will be slightly higher:
+In mid-summer at peak sunlight (1000W/m² Global Solar Radaition), the Odyssey will receive about 1.8 kW of solar energy on all cells. The conversion efficiency for these modules is rated at 20% by the manufacturer. Knowing that, it's possible to calculate the maximum amount of power the Odyssey can harvest with her finite roof-space at 20% module efficiency. Of course, the cell efficiency will be slightly higher:
-<x 14>1.971*800*0.2 = 315 Wp</x>
+<x 14>1825*0.2 = 365 Wp</x>
-Now for the sake of going through it, lets further assume a luxuriously sunny, clear-sky day and the opportunity to harvest 4 hours at maximum peak output, the solar power-budget will accumulate about 1260 Wh (95 Ah).
+Now for the sake of going through it, lets further assume a luxuriously sunny, clear-sky day and the opportunity to harvest 4 hours at maximum peak output, the solar power-budget will accumulate about 1460 Wh (110 Ah).
-<x 14>315 * 4 = 1260 Wh \approx 95 Ah</x>
+<x 14>365 * 4 = 1460 Wh \approx 110 Ah</x>
-Although the panels will not stop converting energy after the peak four hours, the current will probably drop soon enough. As of now there is still not enough data to conclude anything but simulations in the [[https://apollo.open-resource.org/flight-control/vfcc/|VFCC]] are helping to get an [[https://apollo.open-resource.org/flight-control/vfcc/#/dashboard/db/odyssey-solar-power|estimation]].
+Although the panels will not stop converting energy after the peak four hours, the current will probably drop soon enough. As of now there is still not enough data to conclude anything but simulations with the [[lab:ucsspm|UCSSPM]] in the [[https://apollo.open-resource.org/flight-control/vfcc/|VFCC]] are helping to get an [[https://apollo.open-resource.org/flight-control/vfcc/dashboard/db/odyssey-solar-power|estimation]].
 {{:lab:ucsspm-test-dashboard.jpg|Odyssey solar metrics on VFCC dashboard}}

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