Moist air enters a device operating at steady state at 1 atm with a dry-bulb tem

Question

Moist air enters a device operating at steady state at 1 atm with a dry-bulb temperature of 55degreec and a wet-bulb temperature of 25degreeC. Liquid water at 20degreeC is sprayed into the air stream, bringing it to 40degreeC, 1 atm at the exit. Determine The relative humidities at the inlet and exit. The rate that liquid water is sprayed into the air stream, in kg per kg of dry air. Carbon at 25degreeC, 1 atm enters an insulated reactor operating at steady state and reacts completely with the theoretical amount of air entering separately at 25degreeC, 1 atm. Combustion products exit at 2460 K, 1 atm. For the reactor, determine the total flow exergy of the combustion products. Perform calculations relative to the environment of Table A-26 (Model II). Neglect the effects of motion and gravity. The reaction equation is given by: C + O_2+ 3.76N_2 rightarrow CO_2 + 3.76N_2 otes: The weighting of questions is Q1(40%), Q2(30%), Q3(30%) lease remember to put your name and Bannerweb ID on the exam paper

Explanation / Answer

Relative humidity49%.

Rate of flow43kg/kg

Total flow energy-3400Kelvin

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