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A shell-and-tube heat exchanger with two tube passes and baffled single shell pass is used as...

A shell-and-tube heat exchanger with two tube passes and baffled single shell pass is used as oil cooler. Cooling water at 20°C flows through the tubes at a flow rate of 4.082 kg/s. Engine oil enters the shell side at a flow rate of 10 kg/s. The inlet and outlet temperatures of oil are 90°C and 60°C, respectively. The overall heat transfer coefficient based on the outside tube area (Uo) is 262 W/m2⋅K. The specific heats of water and oil are 4.179 kJ/kg⋅ oC and 2.118 kJ/kg⋅ oC, respectively.

Calculate:

  1. Heat Duty Q (kW) and cooling water outlet temperature
  2. The corrected log mean temperature difference
  3. The surface area of the heat exchanger using the LMTD
  4. The effectiveness of the heat exchanger (ε) and capacity ratio (c)
  5. The number of transfer units (NTU)

Solutions

Expert Solution

Amanda K answered 7 months ago
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