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Heat transfer deterioration mechanism for water at supercritical pressure

International Journal of Thermofluids, 2020
Heat transfer deterioration (HTD) phenomena in supercritical water is one of the most thermal hydraulic critical issues for supercritical reactors. The onset of heat transfer deterioration and bouncy effect have been studied in details, however limited ...
Salah El-Din El-Morshedy, Said M.A. Ibrahim, Adel Alyan, Abdelfatah Abdelmaksoud   +3 more
doaj   +4 more sources

Flow Maldistribution in Industrial Air Heaters and its Effect on Heat Transfer [PDF]

Chemical Engineering Transactions, 2014
Flow maldistribution in cross-flow heat exchangers used for industrial air heaters or recuperators is fairly common and can lead to a number of undesirable effects, one of which is deterioration in the thermal performance.
M.J. Atkins, J.R. Neale, M.R.W. Walmsley, T.G. Walmsley, G. De Leon   +4 more
doaj   +3 more sources

Subcooled flow boiling heat transfer of ethanol aqueous solutions in vertical annulus space [PDF]

Chemical Industry and Chemical Engineering Quarterly, 2012
The subcooled flow boiling heat-transfer characteristics of water and ethanol solutions in a vertical annulus have been investigated up to heat flux 132kW/m2.
Sarafraz M.M., Peyghambarzadeh S.M., Vaeli N.   +2 more
doaj   +3 more sources

A Criterion of Heat Transfer Deterioration for Supercritical Organic Fluids Flowing Upward and Its Heat Transfer Correlation [PDF]

Energies, 2020
The main objective of this study was to develop the supercritical heat transfer correlation applicable for organic fluids when flowing upward in smooth tubes based on the available experimental data.
Yung-Ming Li, Jane-Sunn Liaw, Chi-Chuan Wang   +2 more
doaj   +2 more sources

Numerical Study on Heat Transfer Performance of Turbulence Enhancement Configurations for Galinstan Based Mini-Channel Cooling [PDF]

Micromachines
The escalating heat flux density and temperature in highly integrated microelectronic devices adversely affect their reliability and service life, making efficient thermal management crucial for stable operation.
Fajing Li, Junxi Han, Zhifeng Wang, Yi Dai, Peizhu Chen   +4 more
doaj   +2 more sources

Investigation into abnormal heat transfer mechanism of supercritical carbon dioxide in vertically upward Tube

Zhongguo Jianchuan Yanjiu, 2021
ObjectivesThe heat transfer techniques of supercritical CO2 (S-CO2) in small channels have been extensively used in nuclear reactor cooling, aerospace engine cooling and so on.
Juanjuan HU, Zengguang LI, Yimin GAO, Jian YANG, Lang LIU   +4 more
doaj   +1 more source

Experimental investigation on flow boiling heat transfer characteristics of endothermic hydrocarbon fuel and its visualization at high-temperature conditions

FirePhysChem, 2022
The endothermic hydrocarbon fuel is used as a coolant to realize active cooling for the high-heat-flux components of air-breathing hypersonic vehicles. Because of its complex composition and severe thermal boundary conditions, the unstable heat transfer ...
Xiaofeng Huang, Zhaohui Liu, Chunying Li, Chenyang Song, Daoan Sun   +4 more
doaj   +1 more source

Experimental Research on the Flow and Heat Transfer Characteristics of Subcritical and Supercritical Water in the Vertical Upward Smooth and Rifled Tubes

Energies, 2022
Experiments were conducted to investigate the heat transfer and flow characteristics of the vertical upward smooth and rifled tubes from subcritical to supercritical pressure. The distributions of wall temperature and heat transfer coefficient (HTC) were
Xiaocheng Du, Weiteng Li, Xirong Zhang, Jingrong Chen, Tingyu Chen, Dong Yang   +5 more
doaj   +1 more source

Numerical Investigation on Flow Boiling Heat Transfer in Elliptic Microchannel Heat Exchanger with Micro Fins

Chemical Engineering Transactions, 2022
The results of numerical research on boiling heat transfer of R410A refrigerant in an elliptic tube with four microchannels and micro fins are presented in this paper.
Bingcheng Li, Junming Hou, Weihao Ling, Keke Xu, Qiang Gao, Min Zeng   +5 more
doaj   +1 more source

Modeling and Simulations of Deteriorated Turbulent Heat Transfer in Wall-Heated Cylindrical Tube [PDF]

Journal of Verification, Validation and Uncertainty Quantification, 2019
Abstract This paper discusses the modeling and simulations of deteriorated turbulent heat transfer (DTHT) for a wall-heated fluid flows, which can be observed in gas-cooled nuclear power reactors during pressurized conduction cooldown (PCC) event due to loss of force circulation flow.
Prasad Vegendla, Rui Hu
openaire   +1 more source