The Microclimate Cooling Subsystem (MCSS) is a variant of the flight qualified US Army Air
Warrior Microclimate Cooling System (MCS). The MCSS consists of two heat exchangers
connected to the PCA (Pump Control Assembly) integrated into the aircraft or ground
vehicle's Environmental Control System ducts. Cold air flows through the fins of the heat
exchangers chilling the pumped water-glycol fluid through the umbilical and into the
Microclimate Cooling Garment. This personal cooling system further mitigates heat stress in individuals subjected to elevated temperature or wearing thermally restrictive clothing.
Features:
The MCSS uses a 28 VDC pump/controller assembly that circulates the water-glycol based
cooling medium through a heat exchanger, providing approximately 230 watts of system cooling capacity in ambient temperatures as high as 105 deg F. The MCSS accommodates
two users each having an umbilical mounted control potentiomer allowing the user to individually select the amount of cooling desired. Between the Microclimate Cooling Garment
is a low pull force breakaway connector to facilitate "hands free" emergency egress.
Specifications:
Cooling Medium
Water-Glycol Mix
Cooling
325 watts @ 125 deg F
(52 deg C)
Water Temperature
65 to 68 deg F
(18 to 20 deg C)
Water Flow Rate
10 to 12 gph
(38 to 45 lph)
Weight
MCCU Heat Exchanger
MCG
CBA
Pump/Controller
Umbilical Assy
~1.2 lbs
~2.0 lbs
~0.3 lbs
~6.1 lbs
~0.3 lb per ft
(0.5 kg)
(0.91 kg)
(0.14 kg)
(2.8 kg)
(0.45 kg per m)
