Article
Thermodynamics
Ji Li, Guohui Zhou, Tong Tian, Xingping Li
Summary: This paper introduces a new compact loop heat pipe module, which achieves high reliability operation and high thermal performance through improved structure, suitable for cooling edge-computing server CPUs.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Jian Qu, Fengbo Guan, Yaojie Lv, Yalin Wang
Summary: The experimental study showed that micro-grooved OHP can significantly enhance the allowable maximum input heat flux and prevent dry-out. The thermal conductivity of OHP varies under different filling ratios. This study provides a promising option for thermal management of high-density power devices.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Deqiang Li, Zhe Huang, Xiaonan Liao, Shuaifei Zu, Qifei Jian
Summary: The study used visualization method to investigate the heat transfer performance of ultra-thin flat heat pipe (UTFHP), and found that the optimum liquid filling rate is 15%, excessive liquid filling increases thermal resistance, and capillary limit is the key factor restricting the heat transfer limit.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Yuxuan Sheng, Yuhang Chen, Bowen Yu, Mei Tian, Qifei Jian, Xiao Yu
Summary: Under extreme size, the ultra-thin flat heat pipe forms a liquid plug due to the size effect and surface tension, dividing the vapor flow path and affecting the temperature gradient distribution. The presence of the liquid plug increases the start-up time and thermal resistance of the heat pipe at low heating power, but decreases the thermal resistance at higher heating power.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Y. Qu, S. Qiao, D. Zhou
Summary: The steady-state heat transfer model of the asymmetric dual-evaporator loop heat pipe (DE-LHP) reveals that the operating temperature is influenced by the position of the compensation chambers (CCs) and the heat load distribution between the two evaporators. Different domination zones, such as position domination zone and heat load distribution domination zone, are observed when analyzing the heat sharing characteristics and influence of heat sink and ambient temperature on operating temperature. Operating temperature reaches a minimum when heat loads applied to the two evaporators are equal.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Larissa Krambeck, Kelvin G. Domiciano, Luis A. Betancur-Arboleda, Marcia B. H. Mantelli
Summary: This article introduces an improved flat plate pulsating heat pipe with channel modification in the evaporator region, resulting in ultra sharp lateral grooves, to enhance heat transfer performance. Experimental results show that the ultra sharp grooves, acting as artificial nucleation sites and capillary medium, can delay dry-out and make the device suitable for application in microgravity environments.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Yu E. Nikolaenko, D. Pekur, V. M. Sorokin, V. Yu Kravets, R. S. Melnyk, L. Lipnitskyi, A. S. Solomakha
Summary: This study experimentally investigated the thermal characteristics of a copper gravity heat pipe with specific specifications under natural convection, demonstrating its potential application in natural air cooling systems for electronic equipment with high heat flux values.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2021)
Article
Thermodynamics
Zehui Yang, Yunfei Zhang, Lizhan Bai, Haonan Zhang, Guiping Lin
Summary: In this work, a stainless steel-ammonia loop heat pipe with a rectangular evaporator and longitudinal replenishment was designed and tested. The startup characteristics, dynamic operation, heat transfer limit, and thermal resistance were investigated through extensive experiments. The results showed that the LHP exhibited excellent startup performance and could reach a heat transfer limit up to 110 W. The heater area and position played a significant role in the heat transfer limit.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Xiaonan Liao, Qifei Jian, Shuaifei Zu, Deqiang Li, Zhe Huang
Summary: The study showed that the thin thickness of UFHP leads to the liquid bridge phenomenon, hindering the vapor flow. Power input is a key factor influencing the thermal resistance of UFHP, with continuous vapor flow greatly improving heat transfer performance.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Youngmi Baek, Eui Guk Jung
Summary: This study analyzed the experimental results regarding the heat transfer performance of a loop heat pipe (LHP) with a vapor bypass line and a polypropylene fiber capillary wick. The findings showed that the bypass line operation significantly improved the minimum start-up thermal load, start-up thermal performance, and steadystate performance of the LHP.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Yongmi Baek, Eui Guk Jung
Summary: This study analyzed the heat transfer performance of a loop heat pipe with a vapor bypass line and a polypropylene fiber capillary wick. The results showed that the use of the bypass line operation can reduce the minimum start-up thermal load, eliminate temperature overshoot in the evaporator outer wall, and improve steadystate heat transfer performance under high thermal loads.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Anqi Chen, Fan Jiang, Jiajia Dong, Jeffrey Chen, Yuan Zhu
Summary: A novel ultra-thin loop heat pipe (UT-LHP) with capillary wick structures is developed for cooling mobile electronics. By using a novel print wick structuring process on copper substrates, the total thickness of the UT-LHP can be decreased to only 0.3 mm. The heat transfer performance has been evaluated under different heat loads and configurations, showing a minimal thermal resistance of 1.03 degrees C /W at a heat load of 3 W.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Heng Tang, Changxing Weng, Yong Tang, Hui Li, Teng Xu, Ting Fu
Summary: The study proposed a high-performance multiple mesh wick structure fabricated by oxidation treatment and sintering to enhance the thermal performance of UFHPs. The experimental results demonstrated that oxidation treatment effectively enhanced the heat-transport capability of the UFHP with the mesh wick, showing the same capillary performance as sintered powder wicks. Additionally, the performance improvement of the UFHP with the mesh wick was more significant after treatment with chemical oxidation, especially with larger flattened thicknesses.
APPLIED THERMAL ENGINEERING
(2021)
Article
Nuclear Science & Technology
Yuchuan Guo, Zilin Su, Zeguang Li, Jiyang Yu, Kan Wang
Summary: This study investigated the effect of temperature oscillation on a heat pipe cooled reactor. The research found that temperature oscillation in the heat pipe can lead to periodic changes in fuel temperature and reactor power. Additionally, using a buffer layer can mitigate temperature and power oscillation, but may reduce the safety of the reactor system.
ANNALS OF NUCLEAR ENERGY
(2023)
Article
Thermodynamics
Feng Yi, Yunhua Gan, Zhifeng Xin, Yong Li, Hanyin Chen
Summary: In this study, a novel double-layer wick structure consisting of sintered copper powder and spiral woven mesh was proposed to improve the thermal performance of ultra-thin heat pipes. The results showed that the double-layer wick structure exhibited an 11.1% increase in ultimate power compared to the single wick structure.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Thermodynamics
Sihui Hong, Yongle Tang, Shuangfeng Wang
ENERGY CONVERSION AND MANAGEMENT
(2018)
Review
Thermodynamics
Weixiong Wu, Shuangfeng Wang, Wei Wu, Kai Chen, Sihui Hong, Yongxin Lai
ENERGY CONVERSION AND MANAGEMENT
(2019)
Article
Engineering, Electrical & Electronic
Yee-Ting Lee, Chaobin Dang, Sihui Hong, An-Shik Yang, Tsai-Lung Su, Yung-Chun Yang
MICROELECTRONIC ENGINEERING
(2019)
Article
Energy & Fuels
Jin Huang, Jiajie Dai, Shuaiqiao Peng, Tingyu Wang, Sihui Hong
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2019)
Article
Thermodynamics
Yee-Ting Lee, Sihui Hong, Chaobin Dang, Liang-Han Chien, Li-Wang Chang, An-Shik Yang
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2019)
Article
Thermodynamics
Yongle Tang, Sihui Hong, Shuangfeng Wang, Dewen Deng
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2019)
Article
Thermodynamics
Sihui Hong, Siqiang Jiang, Yanxin Hu, Chaobin Dang, Shuangfeng Wang
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2019)
Article
Thermodynamics
Yee-Ting Lee, Sihui Hong, Chaobin Dang, Liang-Han Chien, An-Shik Yang
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2019)
Article
Thermodynamics
Sihui Hong, Chaobin Dang, Eiji Hihara
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2019)
Article
Thermodynamics
Sihui Hong, Chaobin Dang, Eiji Hihara
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Article
Thermodynamics
Sihui Hong, Chaobin Dang, Eiji Hihara
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Article
Energy & Fuels
Yee-Ting Lee, Sihui Hong, Liang-Han Chien, Chih-Jer Lin, An-Shik Yang
Article
Thermodynamics
Yee-Ting Lee, Sihui Hong, Liang-Han Chien, Wan-Hsuan Lin, An-Shik Yang
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Article
Thermodynamics
Sihui Hong, Bohan Zhang, Chaobin Dang, Eiji Hihara
Article
Thermodynamics
Sihui Hong, Chaobin Dang, Eiji Hihara, Hitoshi Sakamoto, Mizuki Wada
APPLIED THERMAL ENGINEERING
(2020)
Article
Thermodynamics
Mahsa Taghavi, Swapnil Sharma, Vemuri Balakotaiah
Summary: This study investigates the natural convection effects in the insulation layers of spherical storage tanks and their impact on the tanks' performance. The permeability and Rayleigh number of the insulation material are considered as key factors. The results show that as the Rayleigh number increases, new convective cells emerge and cause the cold boundary to approach the external hot boundary. In the case of large temperature differences, multiple solutions may coexist.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyang Xu, Fangjun Hong, Chaoyang Zhang
Summary: This study introduces a self-induced jet impingement device for enhancing pool boiling performance in high power electronic cooling. Through visualization and parametric investigations, the effects of this device on pool boiling performance are studied, revealing the promotion of additional liquid supply and vapor exhausting. The flow rate of the liquid jet is found to positively impact boiling performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Wenchao Ke, Yuan Liu, Fissha Biruke Teshome, Zhi Zeng
Summary: Underwater wet laser welding (UWLW) is a promising and labor-saving repair technique. A thermal multi-phase flow model was developed to study the heat transfer, fluid dynamics, and phase transitions during UWLW. The results show that UWLW creates a water keyhole, making the welding environment similar to in air laser welding.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Xingrong Lian, Lin Tian, Zengyao Li, Xinpeng Zhao
Summary: This study investigates the heat transfer mechanisms in natural fiber-derived porous structures and finds that thermal radiation has a significant impact on the thermal conductivity in low-density regions, while natural convection rarely occurs. Insulation materials derived from micron-sized natural fibers can achieve minimum thermal conductivity at specific densities. Strategies to lower the thermal conductivity include increasing porosity and incorporating nanoscale pores using nanosize fibers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Yasir A. Malik, Kilian Koebschall, Stephan Bansmer, Cameron Tropea, Jeanette Hussong, Philippe Villedieu
Summary: Ice crystal icing is a significant hazard in aviation, and accurate modeling of sticking efficiency is essential. In this study, icing wind tunnel experiments were conducted to quantify the volumetric liquid water fraction, sticking efficiency, and maximum thickness of ice layers. Two measurement techniques, calorimetry and capacitive measurements, were used to measure the liquid water content and distribution in the ice layers. The experiments showed that increasing wet bulb temperatures and substrate heat flux significantly increased sticking efficiency and maximum ice layer thickness.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinqi Hu, Tongtong Geng, Kun Wang, Yuanhong Fan, Chunhua Min, Hsien Chin Su
Summary: This study experimentally examined the heat dissipation of vibrating fans and demonstrated its inherent mechanism through numerical simulation. The results showed that the flow fields induced by the vibrating blades exhibited pulsating features and formed large-scale and small-scale vortical structures, significantly improving heat dissipation. The study also identified the impacts of different blade structures and developed a trapezoidal-folding blade, which effectively reduced the maximum temperature of the heat source and alleviated high-temperature failure crisis.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Dan-Dan Su, Xiao-Bin Li, Hong-Na Zhang, Feng-Chen Li
Summary: The boiling heat transfer of low-boiling-point working fluid is a common heat dissipation technology in electronic equipment cooling. This study analyzed the interfacial boiling behavior of R134a under different conditions and found that factors such as the initial thickness of the liquid film, solid-liquid interaction force, and initial temperature significantly affect the boiling mode and thermal resistance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyi Wu, Dongke Sun, Wei Chen, Zhenhua Chai
Summary: A unified lattice Boltzmann-phase field scheme is proposed to simulate dendrite growth of binary alloys in the presence of melt convection. The effects of various factors on the growth are investigated numerically, and the model is validated through comparisons and examinations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shaokun Ge, Ya Ni, Fubao Zhou, Wangzhaonan Shen, Jia Li, Fengqi Guo, Bobo Shi
Summary: This study investigated the temperature distribution of main cables in a suspension bridge during fire scenarios and proposed a prediction model for the maximum temperature of cables in different lane fires. The results showed that vehicle fires in the emergency lane posed a greater thermal threat to the cables.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shuang-Ying Wu, Shi-Yao Zhou, Lan Xiao, Jia Luo
Summary: This paper investigates the two-phase flow and heat transfer characteristics of low-velocity jet impacting on a cylindrical surface. The study reveals that the heat transfer regimes are non-phase transition and nucleate boiling with the increase of heat transfer rate. The effects of jet impact height and outlet velocity on local surface temperatures are pronounced at the non-phase transition stage. The growth rates of heat transfer rate and liquid loss rate increase significantly from the non-phase transition to nucleate boiling stage.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Emad Hasani Malekshah, Wlodzimierz Wlodzimierz, Miros law Majkut
Summary: Cavitation has significant practical importance and can be controlled by air injection. This study investigates the natural to ventilated cavitation process around a hydrofoil through numerical and experimental methods. The results show that the location and rate of air injection have a meaningful impact on the characteristics of cavitation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Feriel Yahiat, Pascale Bouvier, Antoine Beauvillier, Serge Russeil, Christophe Andre, Daniel Bougeard
Summary: This study explores the enhancement of mixing performance in laminar flow equipment by investigating the generation of chaotic advection using wall deformations in annular geometries. The findings demonstrate that the combined geometry can achieve perfect mixing at various Reynolds numbers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Hui He, Ning Lyu, Caihua Liang, Feng Wang, Xiaosong Zhang
Summary: This study investigates the condensation, frosting, and defrosting processes on superhydrophobic surfaces with millimeter-scale structures. The results reveal that the structures can influence the growth and removal of frost crystals, with the bottom grooves creating a frost-free zone and conical edges promoting higher frost crystal heights. Two effective methods for defrosting are observed: hand-lifting the groove and airfoil retraction contraction on protruding structures. This research provides valuable insights into frost formation and defrosting on millimeter-structured superhydrophobic surfaces, with potential applications in anti-frost engineering.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Thiwanka Arepolage, Christophe Verdy, Thibaut Sylvestre, Aymeric Leray, Sebastien Euphrasie
Summary: This study developed two thermal concentrators, one with a 2D design of uniform thickness and another with a 3D design, using the coordinate transformation technique and metamaterials. By structuring the thermal conductor, the desired local density-heat capacity product and anisotropic thermal conductivities were achieved. The homogenized thermal conductivities were obtained from finite element simulations and cylindrical symmetry consideration. A 3D concentrator was fabricated using 3D metal printing and characterized using a thermal camera. Compared to devices that solely consider anisotropic conductivities, the time evolution characteristics of the metadevice designed with coordinate transformation were closer to those of an ideal concentrator.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Liangyuan Cheng, Qingyang Wang, Jinliang Xu
Summary: In this study, we investigated the supercritical heat transfer of CO2 in a horizontal tube with a diameter of 10.0 mm, covering a wide range of pressures, mass fluxes, and heat fluxes. The study revealed a non-monotonic increase in wall temperatures along the flow direction and observed both positive and negative wall temperature differences between the bottom and top tube. The findings were explained by the thermal conduction in the solid wall interacting with the stratified-wavy flow in the tube.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)