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Rowald Refrigeration Systems Photo Catalog
GACS

Ground Air Conditioning System
Model: ADRYO-075E-6KW-6A

Nominal Horsepower: 7-1/2

Condenser: Air-cooled

Evaporator: Direct Expansion

Coolant: Ambient Air

Maintains air temperature and relative humidity of the payload on a Pegasus rocket while sitting on the tarmac

Customer: ORBITAL SCIENCES CORPORATION
DESCRIPTION

The Ground Air Conditioning System GACS is specifically designed to prepare outdoor air to be used as payload conditioned air.  The unit can cool, heat and dry its supply air so that its output air is acceptable for use as payload cooling air.

The design conditions for which the unit was engineered are as follows.

Provide 200 SCFM (900 pounds/hour) of conditioned air to the payload fairing at a dry bulb temperature (DB) of 50F and a dew point (DP) of 20F (30% RH) when operated in ambient conditions less than 90F DB / 80F WB (75% RH) or equivalent.  The GACS is capable of providing conditioned air to the payload fairing over a user selectable range of dry bulb temperatures and dew points as defined below.



GACS Design Reference Conditions
Dry Bulb Temperature
Dew point (%RH)
Air Conditioning/Dehumidification Operations
Maximum Air inlet Conditions
90F
83F (75% RH)
Minimum Air Outlet Conditions
50F
20F (30% RH)
Heating Operations
Minimum Air inlet Conditions
25F
  < / = Ambient
Maximum Air Outlet Conditions
90F
   < / = Ambient
Nominal Operational Set Points
User Selectable Outlet Conditions

30F - 60F
(30% - 50% RH)