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The temperature difference between the two liquids is best utilized if they flow in opposite directions through the heat exchanger. This type of flow is called ________

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The temperature difference between the two liquids is best utilized if they flow in opposite directions through the heat exchanger. This type of flow is called ________

(a) Countercurrent

(b) Concurrent

(c) Rapid flow

(d) Slow flow

This question was posed to me in unit test.

Origin of the question is Heat Exchangers in section Building Blocks of Dairy Processing of Dairy Engineering

1 Answer

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Right answer is (a) Countercurrent

Explanation: The cold product then meets the cold heating medium at the inlet and a progressively warmer medium as it passes through the heat exchanger. During the passage, the product is gradually heated so that the temperature is always only a few degrees below that of the heating medium at the corresponding point. This type of arrangement is called a countercurrent flow.

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