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What are the examples of indirect heat exchangers?

What are the examples of indirect heat exchangers? Correct Answer Shell and tube Heat exchanger, Plate heat exchangers

Indirect heat exchanger, the two fluids can transfer the heat where one fluid flows inside the tubes and other fluid flows over the tubes. Shell and tube Heat exchanger, Plate heat exchangers are the examples of indirect heat exchangers. Steam injectors, cooling towers are the examples of direct heat exchangers.

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