6. 53 regulators rather than the half-oxygen mixture in the hull, their time to hypoxia would be 130 minutes, more than enough either to patch the leak or to be replaced by a second team wearing full spacesuits. The ES group did not analyze the possibility of ebullism due to decompression of the hull. Clearly, if anyone in the population or the repair crews got the bends, the design would be unacceptable. The ES group also worried about the emergency nature of the problem. Should such leaks happen often, the operations of the colony would be seriously disturbed. This scenario also required pressure-tight shelters within the hull and systems to support those shelters until the problem could be dealt with. VI.8: ENERGY FLOW IN THE FIRST CONFIGURATION VI.8.1: General Remarks: As stated in Section V.2.3, the acceptable temperature range is 295-298°K. To maintain the hull temperature at this nearly constant level, the energy inputs and outputs must be very nearly equal at all times. This section identifies the inputs and outputs available and evaluates designs aimed at making them equal. VI.8.2: Description of Inputs: There were two forms of energy admitted into the hull: sunlight and electrical energy. The sunlight entered as a concentrated beam through the window at the tip of one endcap. The electrical energy was generated outside the hull. The generating system was at this point undefined (candidate systems, such as thermal engines and solar cell arrays, are covered in Section VI.9.3). There were no internal energy sources within the hull and, as described in Section VI.4.5, the parabolic mirror shadowed the hull from direct sunlight. As stated in Section VI.4.5, the power flux onto the agricultural area was set at 400 watts/m2 . Since the agricultural area was 6.28x 10 4 m 2 , the sunlight power on the crop areas was: Pagricultural sunlight (400) (6.28xl0 4 ) 2.Slxl0 7 watts
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