Pressure, and Bed Depth for Air Passing Through a Bed
of 4 to 8 Mesh Baralyme Pellets (1)]
e.
Heating coil.
f.
Heating coil control valve.
Gas flowing into
the control is cooled to remove the moisture, then reheated
to an acceptable
temperature. The cooling coil by-pass is used when the
moisture content
is low enough that further dehumidification would produce
unacceptably low
Heating and cooling coils are sized by consideration of the worst case loads.
The control valves on each coil and the by-pass on the cooling duct are used
to adjust the system to less-than-worst case conditions. Heating coil
capacity worst case is the high-pressure, high-helium atmosphere which
requires higher chamber temperatures to maintain acceptable body heat loss of
the inhabitants. Cooling coil capacity worst case may occur when the chamber
is first closed and the moisture content of the atmosphere is high, when the
chamber must be kept cold during a test, or when moisture must be removed at
high chamber pressure. Cooling coil capacity will also determine the time
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