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chemical engineering process equipment and plant design
1. In the case of a shell and tube heat exchanger, the logarithmic mean temperature difference
(A): is always less than arithmetic average value.
(B): is always less than arithmetic mean value, but more than geometric mean value.
(C): is always more than arithmetic mean value and the geometric mean value.
(D): may be either more or less than geometric mean and arithmetic mean value depending upon whether the flow of stream is co-current or counter-current.
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