Thermal Constraints Clause Samples

Thermal Constraints. The thermal limitations are described in the IRD refered above. Main constraints are: SC LVA ring temperature has to remain above +5ºC (LV uncertainties and margins included) Batteries temperature must be limited to +25ºC at the highest. In order to protect batteries from overshoot the charge will be stop at 22ºC (take into account chemical phenomenon in the cells and thermal inertia). The 3º overshoot on batteries temperature has been verified during charging tests on INMARSAT batteries. The thermal analysis must thus demonstrate batteries temperature below 22ºC since overshoot cannot be simulated). The SC thermal model is available at ASTRIUM in a format acceptable by Sea Launch (THERMICA, accordingly to ▇. ▇▇▇▇▇▇▇▇▇▇▇). Dedicated ventilation is needed for battery charging onto the launcher up to a period as close as possible from the launch (D-1?). The description of the access point onto the SC as far as ventilation requirement has been provided to sea Launch last early 2002 and is recalled on Figure4. We need one ventilation pipe per battery, the other ventilation hole is used to vent the air directly into the clean room or fairing cavity (no pipe is needed for outlet). Access to the four holes in the batteries MLI through the fairing is needed since we need to close the four ventilation holes prior flight.