6.59 pumped through it, cooled there, and returned to the colony. The power released to the radiator and radiated out to space by the flowing air would be: where m = mass flow of air (kg/sec) cp heat capacity (constant pressure) of air 9.63xlo 2 joules/kg-(K0 ) (for 50% 0 2 -50% N 2 ) Tinlet radiator inlet temperature Toutlet radiator outlet temperature Tinlet would be the hull temperature, 295°K. According to Section VI.8.3, the power not dissipated through the hull and shield is 2.49xl0 7 watts. This is the desired Poutputrad Thus, m = (295 - Toutlet) = 2.59xl0 4 kg-(°K)/sec Therefore, lowering Toutlet reduces;_ This is advantageous because a lower mass flow allows smaller pumping machinery. However, Toutlet also affects the performance of the radiator, whose temperature varies across its surface between Tinlet and Toutlet· Woodcock and Gregory (6.7) suggest for an equivalent radiator temperature: Tinlet (Tinlet) 2 _ 1 Toutlet
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