Analysis of Heat Exchanger A 2-shell passes and 4-tube passes heat exchanger is used to heat...

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Analysis of Heat Exchanger A 2-shell passes and 4-tube passes heat exchanger is used to heat glycerin from 20°C to 60°C by hot water, which enters the thin-walled 3-cm-diameter tubes at 90°C and leaves at 35°C. The total length of the tubes in the heat exchanger is RN/10 m. The convection heat transfer coefficient is RN/25 W/m2 · °C on the glycerin (shell) side and RN/4 W/m2 · °C on the water (tube) side. Determine the (1) Rate of heat transfer in the heat exchanger (a) before any fouling occurs and (b) After fouling with a fouling factor of 0.0006 m2 · °C/ W occurs on the outer surfaces of the tubes. (2) Mass Flow Rate (3) Effectiveness (4) NTU (5) If NTU of the heat exchanger changed to 3 then what will be the length of the tubes. (6) Discuss the impact of NTU values on the heat exchanger. RN= Registration Number of the student (i.e. 650-FET/BSME/F17 means RN=650) Every student should put his own registration number as where mentioned RN in the question. Analysis of Heat Exchanger A 2-shell passes and 4-tube passes heat exchanger is used to heat glycerin from 20°C to 60°C by hot water, which enters the thin-walled 3-cm-diameter tubes at 90°C and leaves at 35°C. The total length of the tubes in the heat exchanger is RN/10 m. The convection heat transfer coefficient is RN/25 W/m2 · °C on the glycerin (shell) side and RN/4 W/m2 · °C on the water (tube) side. Determine the (1) Rate of heat transfer in the heat exchanger (a) before any fouling occurs and (b) After fouling with a fouling factor of 0.0006 m2 · °C/ W occurs on the outer surfaces of the tubes. (2) Mass Flow Rate (3) Effectiveness (4) NTU (5) If NTU of the heat exchanger changed to 3 then what will be the length of the tubes. (6) Discuss the impact of NTU values on the heat exchanger. RN= Registration Number of the student (i.e. 650-FET/BSME/F17 means RN=650) Every student should put his own registration number as where mentioned RN in the question.