Performance enhancement of double tube heat exchanger using coiled fins

Abstract EN

The effect of inserting coil wire in the shell side of a double pipe heat exchanger on the heat transfer and pressure drop are experimentally investigated.

The experiments are performed using water as the hot and cold working fluid under the turbulent flow condition.

Nine coils with different wire diameter (dw = 2, 4 and 6 mm) and different coil pitch ratio (P/ dw = 2.5, 5 and 7.5) are used in the study.

Results presented an increasing up to 1.59 in the heat transfer coefficient while the pressure drop increased 10 times compared with the smooth pipe.

Results also showed that the increase in the heat gain is very big than the loss in the pumping power