Study on heat transfer and pressure drop performances of ribbed channel in the high temperature heat exchanger

Experimental study on transient heat transfer enhancement from a twisted plate in convection flow of helium gas

“…The researches on enhancing the heat transfer performance are mainly focused on enhancing the heat transfer of the channels, for example, the ribbed channel [18,19] and the channel with various kinds of twisted tape [20,21]. In this study, the heat transfer enhancement by using twisted plate was studied.…”

Study on thermal resistance distribution and local heat transfer enhancement method for SCO 2 –water heat exchange process near pseudo-critical temperature

“…According to Lee et al's research [24], employing macro-fin tube could improve the heat transfer performance of SCO 2 . However, the effect on heat transfer enhancement by adding disturbance in the flow field will gradually decrease as the Reynolds number increases [25,26]. Due to the large density and small dynamic viscosity of SCO 2 , the value of inlet Reynolds number can easily exceed 10 5 when the inlet velocity is relatively small at 1 m/s and dynamic diameter is 10 mm.…”

Thermal-Hydraulic Performance of Different Discontinuous Fins Used in a Printed Circuit Heat Exchanger for Supercritical CO2

“…Under supercritical conditions, the physical properties (e.g., high density and low kinematic viscosity) result in a large value of Reynolds number even when the inlet velocity is quite small, as shown in Table 1. Previous studies [17][18][19] indicated that the effects of heat transfer enhancement caused by these disturbance methods are gradually weakened with increase in Reynolds number. The high Reynolds number of supercritical CO 2 makes it necessary to reconsider the methods of heat transfer enhancement used in the traditional heat exchanger and under normal working conditions.…”