GREATER EFFICIENCY THAN HEAT PIPES

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Plate heat exchangers have a two-step heat transfer process (air>fin>air) and experience no degradation of efficiency throughout a full range of temperature differences. 

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Heat pipes, on the other hand have a six-step heat transfer process (air>fin>tube>fluid>tube>fin>air) severely inhibiting overall heat transfer. Additionally, lower temperature differences greatly affect the rate of fluid movement, further reducing heat pipe efficiency at lower temperature differences.