a stream of outdoor air is mixed with a stream of return air in an airconditioning system that operates at 101 kpa pressure. the flow rate of outdoor air is 3kg/s and its condition is  30 C Tbd and 23 C Twb. the flow rate of return air is 2.5 kg/s  and its condition is 15 C Twb and 60% RH.  Determine: a - enthalpy of mixture  b - humidity ratio of mixture c- dry bulb temperature of mixture

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