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The Total Energy Budget for JES APEX 231.
For purposes of computing the energy budget the drifter will have a modular
representation -- the buoyancy engine, main sensors, main controller, and
data telemetry. Sections 2-5 detail the
energy budget for each of these four modules. The total energy budget for
APEX 231 is the sum of the energy consumed by these four modules.
Table 1:
Total per-profile energy budget for APEX 231.
APEX buoyancy engine (profiles to 800 dbar). |
4.04 kJ |
Seimac ARGOS transmitter (623 xmits). |
2.97 kJ |
SBE41 sensors (48 STP samples, 1830 P-only samples). |
1.07 kJ |
APF5 controller (10.75 day cycle period). |
0.89 kJ |
Total energy consumed for each profile. |
9.0 kJ |
|
Hence, each profile to 800 dbar in the JES consumes approximately 9.0 kJ.
Each D-cell can supply an amount of energy,
|
(1) |
after derating for cold temperatures. Given 40 such D-cells then there is a
total of 1.7 MJ of available energy which is enough to execute approximately
190 profiles.
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Dana Swift, swift@ocean.washington.edu