...Balkrushna A. Shah; Parth Patel; Vikas J. Lakhera Pool boiling is extensively used in high- and low-temperature heat exchangers as it results in a high heat transfer coefficient compared to natural and single-phase forced convection. Pool boiling experimental study conducted over a plain...

... bundles under upward crossflow boiling to see how tube rows affect the heat transfer coefficient (HTC). The experimental setup developed houses the tube bundle for temperature measurements and facilities the recording of high-speed images at different operating conditions. The investigation is carried out...

... in a counterflow type. These are brazed together with the method of salt bath brazing and vacuum brazing. The study presents the analytical formulation of heat transfer and fluid flow in PFHX design to predict the enhancement of heat transfer and overall heat transfer coefficient, finite difference method...

... with the application of 31 kHz ultrasonic field in comparison to the pool boiling without ultrasonic field application for +30 kPa(g) operating pressure at lower heat flux level of 113 kW/m 2 . The maximum augmentation in heat transfer coefficient was calculated as 37.1% and 11.4% for frequency of 31 kHz and 40 kHz...

...: joshi.parimesh92@gmail.com Email: dr.anilpatil@dituniversity.edu.in Email: drmanoj.kumar@dituniversity.edu.in 27 06 2020 17 08 2021 21 08 2021 12 10 2021 pool boiling twisted tape fins heat flux heat transfer coefficient twist ratio perforation index experimental...

... is the hydraulic diameters from 1.19 to 5.15 mm, mass fluxes from 12.5 to 210 kg/(m 2 s), heat fluxes from 6 to 83.4 kWm 2 , saturation pressures from 101.3 to 800 kPa, and vapor qualities from 0 to 0.96. Based on the database, nine existing correlations of flow boiling heat transfer coefficient (HTC) developed...

... (HF) and heat transfer coefficient (HTC) were calculated by iterative method. The results indicated that the aluminum alloy experienced transition boiling, nucleate boiling, and convection cooling regimes during spray quenching process. Heat transfer capability first increased and then decreased...

.... The mass flux range of 10–55 kg/(m 2 · s) with an inlet quality of 0.8 and an outlet quality of 0.1. Experimental results showed that the plain tube exhibited a better condensation heat transfer performance. Moreover, the mass flux had a significant influence on the heat transfer coefficient for shell-side...

.... The reductions for the third, second and first configurations are 65–71%, 53–76%, and 54–74%, respectively. The third configuration results in an average heat transfer coefficient enhancement of up to 49%. On the whole, the improvement in the wall temperature uniformity is higher than the increase...

... thermal model is applied before and during activation of the external heater to provide estimates of the fluid heat transfer coefficient h. The results are correlated with the volume flowrate Q and the fluid temperature T wc . Several different parameter estimation codes are used to estimate the optimal...

..., on condensation heat transfer coefficient (HTC). However, despite numerous applications of condensation on inclined flat plates, there is a lack of understanding of the effect of surface inclination on condensation heat transfer. Accordingly, a dedicated experimental program was undertaken to investigate...

... channel. Furthermore, the outcomes show a dramatic increase in the heat transfer coefficient as the volume fractions of nanoparticles and Reynolds number are increased, and with the decline of particle size, but it accompanied with the increase of shear stress. Among the nanofluids used here, SiO 2 –water...

... S cience and E ngineering A pplications . 22 06 2019 29 06 2019 18 07 2019 25 07 2019 shell and tube single-phase single segmental baffle heat transfer coefficient tube bundle forced convection heat and mass transfer heat exchangers heat transfer enhancement...

... of ASME for publication in the J ournal of T hermal S cience and E ngineering A pplications . 29 12 2018 10 07 2019 10 07 2019 02 08 2019 natural convection dehumidification variable height fin heat transfer coefficient overall Nusselt number heat and mass transfer...

...; while for evaporation the saturation temperature was 6 °C and the quality ranged from 0.2 to 0.8. For condensation, the enhancement ratio (enhanced tube/smooth tube) of the heat transfer coefficients was 1.42–1.95 for the mass flux ranging from 80 to 200 kg/m 2 s; while for evaporation, the heat...

... better than that of the straight channel, and both the heat transfer coefficient and total pressure drop increase with the decrease of D h / R . This study may provide a useful reference for performance prediction and structural design of shell condensers used for underwater vehicles and may provide...

...David Geb; Angelo Lerro; Krsto Sbutega; Ivan Catton Experimental determination of transport coefficients, in particular internal heat transfer coefficients, in heterogeneous and hierarchical heat transfer devices such as compact regenerative heat exchangers has posed a persistent challenge...

... thermography technique, Chang et al. [ 44 ] performed a similar experimental study using a diamond shaped pin-fin array with a rectangular channel under high rotation number. Only the heat transfer coefficient distribution on the endwall is examined as the insulated pin-fins are heat transfer inactive...

... mm thickness. The test results show that the addition of carbon nanotubes increases the boiling heat transfer coefficient of base fluids. The enhancement of heat transfer coefficient was found at 1.75, 1.2, and 1.2 folds corresponding to 0.25%, 0.5%, and 1.0% concentration of CNT by volume in water...