8. A thin-walled double-pipe parallel-flow heat exchanger is used to heat a chemical whose specific heat...

 

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8. A thin-walled double-pipe parallel-flow heat exchanger is used to heat a chemical whose specific heat is 1800 J/kg- °C with hot water (Cp = 4180 J/kg °C). The chemical enters at 20°C at a rate of 3 kg/s, while the water enters at 110°C at a rate of 2 kg/s. The heat transfer surface area of the heat exchanger is 7 m² and the overall heat transfer coefficient is 1200 W/m². °C. Determine the outlet temperatures of the chemical and the water. Chemical 20°C 3 kg/s Hot water 110°C 2 kg/s 8. A thin-walled double-pipe parallel-flow heat exchanger is used to heat a chemical whose specific heat is 1800 J/kg- °C with hot water (Cp = 4180 J/kg °C). The chemical enters at 20°C at a rate of 3 kg/s, while the water enters at 110°C at a rate of 2 kg/s. The heat transfer surface area of the heat exchanger is 7 m² and the overall heat transfer coefficient is 1200 W/m². °C. Determine the outlet temperatures of the chemical and the water. Chemical 20°C 3 kg/s Hot water 110°C 2 kg/s