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Keywords: heat transfer coefficient
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Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. December 2022, 14(12): 121008.
Paper No: TSEA-22-1145
Published Online: August 24, 2022
... 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...
Journal Articles
Article Type: Technical Briefs
J. Thermal Sci. Eng. Appl. June 2022, 14(6): 064501.
Paper No: TSEA-20-1394
Published Online: October 12, 2021
... as perforated TTFs. A lower value of twist ratio brings out higher heat flux in all cases. Fig. 6 Variation of heat transfer coefficient with the boiling heat flux for solid TTFs Variation of heat transfer coefficient with the boiling heat flux for solid TTFs Fig. 5 Boiling heat flux...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. April 2022, 14(4): 041011.
Paper No: TSEA-21-1147
Published Online: August 6, 2021
... 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...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. April 2022, 14(4): 041013.
Paper No: TSEA-21-1152
Published Online: August 6, 2021
... (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...
Journal Articles
Article Type: Technical Briefs
J. Thermal Sci. Eng. Appl. March 2022, 14(3): 034502.
Paper No: TSEA-20-1508
Published Online: July 27, 2021
.... 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...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. August 2021, 13(4): 041029.
Paper No: TSEA-20-1515
Published Online: March 5, 2021
.... 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...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. June 2021, 13(3): 031024.
Paper No: TSEA-20-1360
Published Online: November 6, 2020
... 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...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. August 2020, 12(4): 041028.
Paper No: TSEA-19-1551
Published Online: May 20, 2020
..., 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...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. August 2020, 12(4): 041025.
Paper No: TSEA-19-1260
Published Online: May 19, 2020
... 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...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. February 2020, 12(1): 011017.
Paper No: TSEA-19-1294
Published Online: September 7, 2019
...(200003)29:2<91::aid-htj1>3.0.co;2-q [23] Ayub , Z. H. , 2005 , “ A New Chart Method for Evaluating Single-Phase Shell Side Heat Transfer Coefficient in a Single Segmental Shell and Tube Heat Exchanger ,” Appl. Therm. Eng. , 25 ( 14–15 ), pp. 2412 – 2420 . 10.1016/j.applthermaleng...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. February 2020, 12(1): 011013.
Paper No: TSEA-18-1694
Published Online: September 7, 2019
... 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...
Journal Articles
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. April 2020, 12(2): 021016.
Paper No: TSEA-19-1164
Published Online: September 4, 2019
...; 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...
Journal Articles
Article Type: Research-Article
J. Thermal Sci. Eng. Appl. October 2019, 11(5): 051007.
Paper No: TSEA-18-1349
Published Online: March 21, 2019
... 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...
Journal Articles
Article Type: Research-Article
J. Thermal Sci. Eng. Appl. March 2014, 6(1): 011005.
Paper No: TSEA-13-1014
Published Online: October 21, 2013
... 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 for designers. The goal of this study is to (1) present a new general treatment of the experimental...
Journal Articles
Article Type: Research-Article
J. Thermal Sci. Eng. Appl. June 2013, 5(2): 021008.
Paper No: TSEA-12-1197
Published Online: May 17, 2013
.... mainbody trailing edge pin-fins rib-turbulators heat transfer coefficient internal cooling Gas turbines are the prime mover in critical industries such as power generation, oil and gas, processing plants, and aircraft propulsion. Based on the application and power rating, gas turbines can...
Journal Articles
Article Type: Invited Papers
J. Thermal Sci. Eng. Appl. June 2009, 1(2): 022001.
Published Online: September 16, 2009
... 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...