Question
A heat exchanger uses oil (cp = 1880 J kg-1 K-1) at an initial temperature of...
A heat exchanger uses oil
(cp = 1880 J kg-1 K-1) at an
initial temperature of 205°C to heat up water with heat capacity of
1 kcal kg-1 K-1, and density = 0.998 g
cm-3, flowing at 0.00376 m3 min-1
from 16°C to 44°C. The configuration of the heat exchanger is in
countercurrent. The oil mass flow rate is 270 kg
h-1.
(1 cal = 4.18 J)
(i) What is the heat transfer area required for an overall heat transfer coefficient of 0.34 kW m-2 K-1)?
(ii) Determine the number of transfer units (NTU).
(iii) Calculate the effectiveness of the heat exchanger.
Homework Answers
Answer #1
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