Turbulent flow heat transfer and pressure loss in a double pipe heat exchanger with louvered strip inserts

Study on thermal and fluid flow characteristics in turbulent channel flows with multiple twisted tape vortex generators

“…As preliminary design guidance to the selection of a technique, the thermal enhancement index can be evaluated based on the power consumption per unit mass of fluid [23,24]. This suggests that a performance comparison between the channel with or without MT-VG can be made by comparing heat transfer coefficients (h) under equal pumping power, since this is relevant to the operation cost.…”

Influences of pitch-length louvered strip insert on thermal characteristic in concentric pipe heat exchanger

“…The result shows that a good agreement was found between the theoretical correlations and CFD simulated result. Eimsa-ard [6] experimentally studied the influenced of louvered strip insert with backwards and forward arrangement on the characteristics heat transfer and friction factor of concentric pipe heat exchanger. The results reveal that the using of louvered strip insert yielded the higher heat transfer rate compared with a plain tube.…”

“…From literatures [3][4][5][6][7][8][9][10], there are many aspects that influence the use of louvered strip insert (geometry, the arrangement to the flow direction, and shape of louvered strip insert). The main mechanism of heat transfer enhancement due to insertion include the reduction of the hydraulic diameter and induced swirling flow makes a better fluid mixing [11].…”

Heat transfer and pressure drop characteristics in a circular tube fitted with and without V-cut twisted tape insert

“…The overall heat transfer coefficient The percentage error between heat loss and heat gain by the fluids were found out to be 2% to 8% [4,5]. Thus it was concluded that the heat loss to the surroundings was reasonably small.…”

“…Dewan et al [2] reviewed that passive techniques particularly twisted tape and wire coil insert are economical heat transfer augmentation tools. Eiasma-ard et al [3][4][5][6][7] experimentally investigated the heat transfer and friction factor characteristics in a circular tube fitted with different tube inserts and proposed correlations for the Nusselt number and friction factor. Chang et al [8,9] experimentally compared the heat transfer and friction factor characteristics of smooth twisted tape with broken and serrated twisted tape inserts.…”