6.86 with a 20% overlap in its dimensions. The colony's two-mirror arrangement requires that the incoming sunlight be closely aligned with the colony axis. Because of the 20% overlap, position accuracy is not required but the angular orientation of the flat mirror must be accurate. This is handled by attitude-control systems on the flat mirror (i.e., gyros, thrusters). The shadow reflector is rectangular, 20% larger in its dimensions than the maximum dimensions of the colony. Thus, besides shielding the colony itself from direct sunlight, it provides shadow zones near the hull to ease work in those volumes. The shadow reflector is a low-mass trusswork supporting an opague membrane and some attitude-control systems. Should there be a large space structure under assembly next to the colony, either the structure itself or the power-generating structure for its construction site could serve as shadow reflector. VI.10: TEMPERATURE AND HUMIDITY CONTROL VI.10.1: General Remarks: The hull configuration of the prototype colony presents a problem not unlike many large buildings on Earth. The interior of the colony generates heat and increases ambient humidity through the operation of its tenants. It must be conditioned to a steady-state temperature-humidity range. Unwanted odors and gases must be removed and the atmosphere cleansed of particles. The major difference between the colony and the Louisana Superdome is that the air system is closed: at LS there is no "outside air supply" and exhausting return air would deplete the atmosphere and lead to great expense. This section identifies temperature and humidity loads on the prototype colony. Heat gain is broken down into latent heat and sensible heat loads in order to obtain demand for humidity control. A condensation system to remove excess humidity is proposed as well as a number of alternatives for temperature control. The energy required to operate the humidity control and temperature control systems is estimated.
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