Article
Energy & Fuels
Hak Rae Cho, Su Cheong Park, Doyeon Kim, Hyeong-min Joo, Dong In Yu
Summary: This study developed hydrophilic micro/nanotextured surfaces with hydrophobic patterns to enhance both boiling heat transfer and critical heat flux simultaneously. Experimental data supported the hypothesis that capillary-induced flow between microtextures and superhydrophilic nanotextures contribute to increasing critical heat flux, while the hydrophobicity at the top of the micropillars leads to higher nucleate site density and boiling heat transfer.
Article
Nanoscience & Nanotechnology
Bo Yuan, Lei Liu, Chenyi Cui, Jiabin Fang, Yonghai Zhang, Jinjia Wei
Summary: The study designed a series of heterogeneous surfaces with fractal treelike hydrophilic networks to enhance flow boiling performance and increase the critical heat flux (CHF). The research showed that the heterogeneous surfaces improved heat transfer performance, particularly CHF, compared to smooth surfaces and surfaces covered homogeneously with microstructures.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Thermodynamics
Hamid Reza Mohammadi, Hamed Taghvaei, Ataollah Rabiee
Summary: This study investigates the effect of surface modifications on critical heat flux (CHF) and other key parameters. Experimental results demonstrate that hydrophilic films deposited on surfaces significantly increase CHF and heat transfer coefficient (HTC), while hydrophobic films deposited on copper surfaces reduce the onset of nucleate boiling (ONB) by up to 53%.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Nanoscience & Nanotechnology
Youngsup Song, Shuai Gong, Geoffrey Vaartstra, Evelyn N. Wang
Summary: Boiling is a fundamental process in many applications where surfaces with microcavities or biphilic wettability can enhance heat transfer efficiency. This study investigated microtube structures to simultaneously enhance heat transfer coefficient and critical heat flux, achieving significant improvements compared to smooth surfaces. The combination of micropillars and microtubes further increased critical heat flux by separating nucleating bubbles and rewetting liquids.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Thermodynamics
Zhenping Wan, Xuesong Hu, Xiaowu Wang, Zicong He
Summary: An increasing number of exchange tubes are required to enhance both boiling heat transfer and condensation heat transfer. However, few studies have been conducted in this field. A stepped lattice finned tube is suggested to enhance both heat transfer mechanisms. In this study, the heat transfer performances of tubes with hybrid hydrophilic-hydrophobic surfaces and functional fins are experimentally investigated, demonstrating significant improvements in both condensation and boiling heat transfer coefficients.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Mayowa I. Omisanya, Zhihao Chen, Yoshio Utaka
Summary: Flow boiling heat transfer was studied using a different-mode-interacting boiling (DMIB) method to enhance critical heat flux (CHF) and heat transfer coefficient (HTC). The nonuniform surfaces were found to significantly improve CHF under certain conditions, showing the potential for enhanced performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Yuan Feng, Fucheng Chang, Zitu Hu, Huixiong Li, Jianfu Zhao
Summary: Surface modification technology to enhance boiling heat transfer performance has attracted significant interest. Numerical simulations are a new reliable way to study pool boiling processes, but there is still a lack of research on numerical simulations of boiling processes on mixed surfaces. Further studies are needed to explore this area.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Thermodynamics
Amatya Bharadwaj, Rahul Dev Misra
Summary: The emergence of high performing micro-sized devices in recent decades has led to increased heat generation, challenging traditional cooling methods. To address this challenge, boiling heat transfer mechanisms have gained prominence, with parameters such as CHF and NBHTC being used for assessment. The nucleate boiling phase, which involves bubble generation and detachment, has proven to be the most efficient. Various surface modification techniques have been explored, but some issues remain. To overcome these issues, this study employed the EDC method to develop microstructured boiling surfaces.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Youngsup Song, Lenan Zhang, Carlos D. Diaz-Marin, Samuel S. Cruz, Evelyn N. Wang
Summary: This study investigates the role of structured surfaces in enhancing critical heat flux (CHF) during pool boiling. The results show that CHF enhancement on structured surfaces cannot be solely explained by roughness or wickability. A unified descriptor, representing the combined effects of thin film density and volumetric wicking rate, is derived and shows a reasonable correlation with CHF values.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Atul Ranjan, Israr Ahmad, Rinku Kumar Gouda, Manabendra Pathak, Mohd Kaleem Khan
Summary: This study reports the creation of Cu(OH)2 nanoneedles on a copper surface using an anodization process, which can enhance critical heat flux (CHF) limit in pool boiling applications by improving surface wettability and wickability. Results show that the anodized surface requires higher wall superheat for nucleation and exhibits a higher CHF value compared to the plain surface.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Thermodynamics
Seyed Moein Rassoulinejad-Mousavi, Firas Al-Hindawi, Tejaswi Soori, Arif Rokoni, Hyunsoo Yoon, Han Hu, Teresa Wu, Ying Sun
Summary: This research explores how deep learning can adapt to new datasets with limited data, studying convolutional neural networks and transfer learning. The study found that transfer learning outperforms convolutional neural networks in cases of data scarcity, demonstrating higher accuracy and lower false negative rates.
APPLIED THERMAL ENGINEERING
(2021)
Article
Physics, Applied
Madhumitha Ravichandran, Guanyu Su, Chi Wang, Jee Hyun Seong, Artyom Kossolapov, Bren Phillips, Md Mahamudur Rahman, Matteo Bucci
Summary: A neural network model was developed to predict the departure from nucleate boiling ratio (DNBR) using high-resolution infrared measurements of bubble dynamics on different surfaces. The importance of fundamental boiling parameters such as nucleation site density, bubble departure frequency, growth time, and footprint radius in predicting the boiling crisis was elucidated. The study concluded that these parameters are equally necessary and important, undermining the general validity of models attempting to predict critical heat flux based on single boiling parameters.
APPLIED PHYSICS LETTERS
(2021)
Article
Thermodynamics
W. J. Van den Bergh, H. R. Moran, J. Dirker, C. N. Markides, J. P. Meyer
Summary: The study investigated flow boiling of R-245fa at low mass and heat fluxes. It was found that the heat transfer coefficient was influenced by both mass and heat fluxes, with an increase in mass flux leading to an increase in heat transfer coefficient. Higher vapor quality cases were more sensitive to mass flux, except at low heat flux conditions.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
P. Liu, Y. S. Guo, W. L. Zheng, Y. T. Song, X. B. Peng, M. Y. Tang, W. H. Wang, S. F. Huang, J. D. Ji, Q. H. Chen, X. Mao
Summary: The novel compound heat transfer tube (CHTT) combining twisted tape inserts and internal thread tube showed better performance in enhancing subcooled critical heat flux (CHF) compared to individual techniques. CHF in CHTT was directly proportional to pitch, mass flux, and pressure, while inversely proportional to twist ratio. Tong-75-II correlation provided the most accurate prediction of CHF in CHTT, with a mean absolute error (MAE) of 32.80% and a root mean square error (RMSE) of 33.72%.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Dawen Zhong, Xuexin Lian, Haopeng Shi, Junfeng Zhang, Ji 'an Meng, Jingyu Zhang
Summary: In-vessel retention (IVR) technology is an effective strategy to retain molten materials in the reactor pressure vessel (RPV) during severe accidents in nuclear power plants. A novel type of reticular hollow shell structure (RHS) was designed to enhance the critical heat flux (CHF) of external reactor vessel cooling (ERVC). Experimental results showed that the CHF was significantly increased on all RHS surfaces compared to the plain surface, and surface 1 and surface 3 exhibited better boiling heat transfer performance.
APPLIED THERMAL ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Long-Sheng Kuo, Hsu-Sheng Huang, Te-Hshuan Chen, Sujith C. S. Kumar, Ping-Hei Chen
JOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS
(2019)
Article
Materials Science, Multidisciplinary
Ramasamy Anbarasan, Shanmugam Palanikumar, Ayyadurai Anitha Devi, Ping-Hei Chen, Kuo Lun Tung
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
(2019)
Article
Thermodynamics
Sujith C. S. Kumar, Yu Hsuan Chuang, Mario R. Mata Arenales, Albin Joseph, Ping-Hei Chen
HEAT AND MASS TRANSFER
(2020)
Article
Nanoscience & Nanotechnology
Hui-Chung Cheng, Tien-Li Chang, Chao-Sung Lin, Ping-Hei Chen
Article
Thermodynamics
Hui-Chung Cheng, Te-Hsuan Chen, Hsu-Sheng Huang, Ping-Hei Chen
Summary: This study investigated the thermal performance of ultra-thin heat pipes with a focus on the effect of superhydrophilic wick structures, filling ratio, and sectional lengths. The experimental results showed that superhydrophilic wick structures and a filling ratio of 16.4% resulted in the best thermal performance. Additionally, the variation of sectional lengths impacted thermal resistance and heat transport capacity.
HEAT TRANSFER ENGINEERING
(2021)
Article
Thermodynamics
Mario R. Mata Arenales, Kumar C. S. Sujith, Long-Sheng Kuo, Ping-Hei Chen
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Article
Chemistry, Physical
Hui-Chung Cheng, Zong-Xun Jiang, Tien-Li Chang, Ping-Hei Chen
APPLIED SURFACE SCIENCE
(2020)
Article
Thermodynamics
Hui-Chung Cheng, Tien-Li Chang, Ping-Hei Chen
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Article
Thermodynamics
Hui-Chung Cheng, Zong-Xun Jiang, Tien-Li Chang, Ping-Hei Chen
Summary: The study found that on copper tubes with different levels of wettability, the heat transfer coefficient of the biphilic surface with hydrophobic patterns increased to 1.16, while that with superhydrophobic patterns decreased to 0.83.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2021)
Article
Thermodynamics
Hui-Chung Cheng, Yu-Ying Chen, Tien-Li Chang, Ping-Hei Chen
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Editorial Material
Engineering, Multidisciplinary
Ping-Hei Chen, Ming-Jyh Chern
JOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS
(2021)
Article
Thermodynamics
Hui-Chung Cheng, Ho-Ching Lin, Ping-Hei Chen
Summary: The study investigated the effects of charged surfactants in electrolytic pool boiling on heat transfer performance, finding an optimal current for enhancing the heat transfer coefficient. Analysis of bubble behaviors using high-speed images revealed that using charged surfactants in electrolytic boiling significantly increased the heat transfer coefficient due to the number of bubble nucleation sites and bubble departure frequency.
APPLIED THERMAL ENGINEERING
(2021)
Article
Chemistry, Physical
Chin-Chi Hsu, Hui-Chung Cheng, Tien-Li Chang, Ping-Hei Chen
Summary: Experimental results showed that the laser-textured heterogeneous copper surface exhibited higher efficiency in water droplet evaporation, with bubble dynamics playing a significant role in droplet evaporation on heated surfaces.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Thermodynamics
Hui-Chung Cheng, Cheng-Han Li, Tien-Li Chang, Ping-Hei Chen
Summary: This study investigated droplet evaporation on biphilic surfaces and found that the formation of a ring-shaped droplet during the evaporation process enhanced the efficiency of evaporation. The experimental results were compared with the theoretical model proposed in the literature.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Pei-Ching Lin, Hui-Chung Cheng, Ping-Hei Chen
Summary: This study investigated the effects of varying surface wettability on the heat transfer performance of modified copper surfaces in spray cooling. The results showed that higher hydrophilicity led to higher heat transfer performance in the nonboiling regime, while hydrophobic surfaces outperformed plain surfaces in the two-phase regime. Evaporation fraction values were derived and heat transfer prediction models considering surface wettability were established.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2023)
