Solved: An air-conditioning system involves the mixing of

Chapter 5, Problem 583

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An air-conditioning system involves the mixing of cold air and warm outdoor air before the mixture is routed to the conditioned room in steady operation. Cold air enters the mixing chamber at 78C and 105 kPa at a rate of 0.55 m3 /s while warm air enters at 348C and 105 kPa. The air leaves the room at 248C. The ratio of the mass flow rates of the hot to cold air streams is 1.6. Using variable specific heats, determine (a) the mixture temperature at the inlet of the room and (b) the rate of heat gain of the room.

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