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Q2: It is required to cool down 20 kg/s of an aqueous solution whose specific heat is 4,180 J/(kg·K) from an inlet temperature of 67 °C to 37 °C. The operation will be performed with cooling water available at 17 °C. Determine the number of shell passes of the heat exchanger using a water mass flow of (a) 40 kg/s (b) 20 kg/s. Hint: it is recommended never to design heat exchangers with an Ft lower than 0.75. For each water mass flow, calculate Ft correction factor given a heat exchanger of 1- 2. If Ft > 0.75, this means that a 1-2 exchanger is possible. Otherwise, the exchanger proposed is not possible for these conditions. 03-

          Q2:
It is required to cool down 20 kg/s of an aqueous solution whose specific heat is 4,180
J/(kg·K) from an inlet temperature of 67 °C to 37 °C. The operation will be performed
with cooling water available at 17 °C. Determine the number of shell passes of the
heat exchanger using a water mass flow of
(a) 40 kg/s
(b) 20 kg/s.
Hint: it is recommended never to design heat exchangers with an Ft lower than 0.75.
For each water mass flow, calculate Ft correction factor given a heat exchanger of 1-
2. If Ft > 0.75, this means that a 1-2 exchanger is possible. Otherwise, the
exchanger proposed is not possible for these conditions.
03-

Q2:
It is required to cool down 20 kg/s of an aqueous solution whose specific heat is 4,180
J/(kg·K) from an inlet temperature of 67 °C to 37 °C. The operation will be performed
with cooling water available at 17 °C. Determine the number of shell passes of the
heat exchanger using a water mass flow of
(a) 40 kg/s
(b) 20 kg/s.
Hint: it is recommended never to design heat exchangers with an Ft lower than 0.75.
For each water mass flow, calculate Ft correction factor given a heat exchanger of 1-
2. If Ft > 0.75, this means that a 1-2 exchanger is possible. Otherwise, the
exchanger proposed is not possible for these conditions.
03-

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