Hot exhaust gases leaving an internal combustion engine at 400 deg C and 150 kPa at a rate of 0 8 kg s is to be used to produce saturated steam at 200 deg C in an insulated heat exchanger Water enters the heat exchanger at the ambient temperature of 20 deg C, and the exhaust gases leave the heat exchanger at 350 deg C Determine (a) The rate of steam production, (b) The rate of energy destruction in the heat exchanger, and (c) The second law efficiency of the heat exchanger Exh gas 400C 150 kPa 350C HEAT EXCHANGER Sat vap 200 C Water 20C

Question: Hot exhaust gases leaving an internal combustion engine at 400°C and 150 kPa at a rate of 0.8 kg/s is to be used to produce

Hot exhaust gases leaving an internal combustion engine at 400°C and 150 kPa at a rate of 0.8 kg/s is to be used to produce saturated steam at 200°C in an insulated heat exchanger. Water enters the heat exchanger at the ambient temperature of 20°C, and the exhaust gases leave the heat exchanger at 350°C. Determine
(a) The rate of steam production,
(b) The rate of energy destruction in the heat exchanger, and
(c) The second-law efficiency of the heat exchanger.

Hot exhaust gases leaving an internal

Exh. gas 400C 150 kPa 350C HEAT EXCHANGER Sat. vap. 200 C Water 20C

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