Abstract
Thermal performance analysis of a cross-flow heat exchanger using plain and almond dimple tubes has been investigated. Hot air and water are used as fluids on shell and tube side respectively. Reynolds Number is obtained in the range of 9000–30,000 by varying the mass flow rate of air on the shell side of cross-flow heat exchanger. The performance parameters such as overall heat transfer coefficient, water side heat duty, effectiveness, pressure drop are calculated for both the plain and dimple tubes. The dimpled tubes show heat transfer enhancement by 30% and more efficient heat recovery over plain tubes at the cost of small pressure drop penalty.
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