Article
Thermodynamics
Tanathep Leungtongkum, Onrawee Laguerre, Steven Duret, Denis Flick
Summary: This article discusses the capabilities and limitations of three validated models (lumped, zonal, and CFD) in solving technical issues related to food transport in an insulated box with a PCM. The lumped model is suitable for investigating the effect of box design and operating conditions where temperature heterogeneity is not the main concern. The zonal model depicts spatial temperature variations but requires certain assumptions specific to the product arrangement and PCM location. The CFD model provides the most detailed information on physical phenomena and temperature variations but has a high computational cost.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Guofu Ren, Tao Lai, Zhiguo Qu, Xueliang Wang, Guobin Zhang
Summary: In this study, a reverse-gradient gas diffusion layer (GDL) is fabricated using the electrospinning method to improve the performance of proton exchange membrane fuel cell (PEMFC) systems under nonhumidification conditions. The experimental results show that the reverse-gradient GDL can retain more water and provide a higher power density under low-humidity conditions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Jingtan Chen, Dan Shi, Shahid Ali Khan, Kejian Dong, Abd Allah A. Mousa, Jiyun Zhao
Summary: The rising heat dissipation demand on electronic devices has prompted the need for more efficient and energy-saving cooling strategies. Multichannel flow boiling offers a solution by utilizing the latent energy of vapor, preventing heat accumulation. However, to optimize multichannel design, we must also consider pressure drop minimization and flow instability mitigation. In this study, a Lattice Boltzmann Method is used to investigate the effects of various factors on the overall performance of multichannel flow boiling. The findings provide valuable insights for the design of multichannel heat sinks and shed light on the mechanisms of flow boiling enhancement.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Ashreet Mishra, Prashant Singh, Like Li
Summary: This study presents a continuum heat transfer model to investigate the heat transfer enhancement in MPBHXs with the presence of high-porosity metal foams. The results show that metal foams can enhance the heat transfer in MPBHXs.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Cong Li, Jiali Wang, Chenhui Wang, Yanke Jin, Yina Yao, Rui Yang
Summary: This study investigates the impact of NaCl water droplets with various concentrations on a heated surface. The results show that the impact patterns can be categorized into different types, and models are established to predict the spreading behavior of droplets with different concentrations. Additionally, high concentration droplets exhibit more violent boiling and have lower residual energy and rebound time.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)
Article
Thermodynamics
Aakhash Sundaresan, Atul Srivastava, Callum Atkinson
Summary: This study presents the first-ever application of an advanced methodology, combining two-color laser-induced phosphorescence and particle image velocimetry, to investigate the heat transfer mechanisms on the surface of a cylinder placed inside a confined square duct. The technique allows for simultaneous measurement of velocity and temperature fields, reducing the complexity and costs associated with separately measuring temperature distributions. Experimental observations show that increasing the mass flow rate enhances heat removal from the cylinder surface, and increasing the cylinder heat input enhances heat transfer in the rear portion of the cylinder.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)
Article
Thermodynamics
Zhihui Zhang, Xian Wang
Summary: This study proposes a novel transpiration cooling layout that improves the cooling effect in the stagnation region and downstream zones for a sharp leading edge. The proposed combinational cooling method shows significant improvement in the cooling performance of the stagnation zone and downstream regions. The RR-TLBM solver demonstrates potential in capturing the 3D coherent structures in the transpiration-cooled leading edge.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Shiyou Yang, Ruicheng Yang
Summary: A semi-detailed model has been developed in this study to simulate the thermal runaway chemistry of lithium-ion batteries and mitigate the risks associated with thermal runaway. The model consists of a global part and an elementary reaction mechanism part, which are coupled to capture the interactions between them. The comparison between simulation results and experimental data shows that the semi-detailed model is capable of capturing the correct species trends, indicating its reliability.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Ali Ul Atas Khan, Taqi Ahmad Cheema, Hafiz Muhammad Rizwan, Rizwan Ullah, Muhammad Tayyab, Cheol Woo Park
Summary: This study experimentally compares the performance of a shell-and-tube heat exchanger with a gravitational water vortex heat exchanger. The experimental findings show that the gravitational water vortex heat exchanger with an air core performs 40% better than without an air core. Furthermore, for the same hot-side inlet temperatures, the gravitational water vortex heat exchanger has a 22% and 24% higher heat transfer rate compared to the shell-and-tube heat exchanger.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Li Ling, Yijun Xia, Li Zhao, Qianlong Hu, Zheyu Zhang, Zihao Xiang, Danhao Song
Summary: Loop heat pipe (LHP) is widely used for high heat flux in electronic chips. A novel LHP with 13 parallel vapor channels was designed. Experimental investigations demonstrated rapid start-up, stable operation, and good temperature control performance of the LHP.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Minjie Yu, Lei Xu, Haichuan Cui, Zhichun Liu, Wei Liu
Summary: The study investigates the impact of inclined-flow regenerators and sinusoidal corrugated-channel regenerators on the performance of Stirling engines. The results show that the sinusoidal corrugated-channel regenerator exhibits good heat and mass transfer performance and can significantly improve the output power and thermal efficiency of the engine.
Article
Thermodynamics
Qiming Cao, Haitao Min, Honghui Zhao, Weiyi Sun, Yuanbin Yu, Zhaopu Zhang, Junyu Jiang
Summary: This study introduces a low-temperature thermal management system for proton exchange membrane fuel cells (PEMFCs) that combines a phase-change material (PCM) with liquid cooling. The system effectively utilizes waste heat generated during fuel cell operation to heat the PCM, which is then transferred to the stack after shutdown to maintain the stack temperature above the minimum startup threshold. A thermal model of the system is established and validated using numerical simulations. The results demonstrate that the proposed system can sustain the stack temperature above 0 degrees C for 63.36 hours in an environment at -20 degrees C. The system also has better temperature uniformity and a reduced stack startup time compared to passive thermal management. This study provides innovative solutions to address the challenges of cold starts and is a valuable reference for future thermal management system designs.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Wei Chen, Min Tu, Hui Huang, Junlu Fang, Wenhao Deng
Summary: This paper introduces an innovative aquifer-cooled radiant wall panel system that improves cooling capacity and maintains uniform surface temperatures. Compared to traditional radiant systems, this system's installation does not compromise space height and demonstrates high efficiency and reliability in experimental tests.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xiaoxiao Ren, Zijun Han, Jinpeng Ma, Kai Xue, Daotong Chong, Jinshi Wang, Junjie Yan
Summary: This study proposes a distributed multi-energy system driven by renewable energy sources and presents optimization models and operation strategies for reducing energy consumption and carbon emissions in data centers.
Article
Thermodynamics
Qinghui Shi, Hongzheng Zhu, Tuo Shen, Zhiqian Qin, Jinbo Zhu, Lei Gao, Zhanbei Ou, Yong Zhang, Gaochao Pan
Summary: In this study, the effects of frother on bubble properties and flow field were investigated using PIV technique. The results showed that as the concentration of frother increased, the bubble properties and low-velocity region changed. A predictive model for coal particle entrainment probability influenced by frothers was established, providing valuable insights into the development of mineral flotation technology.
Article
Thermodynamics
C. Barrera, V. Castro, F. Escudero, J. J. Cruz, I. Verdugo, J. Yon, A. Fuentes
Summary: This study focuses on the characterization of soot maturity and sooting propensity of anisole fuel in a controlled laminar coflow diffusion flame. The results show that the spatial distribution of soot volume fraction is enhanced near the flame centerline, while soot production is promoted near the flame wings. The temperature increase also affects the maturity of soot particles.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)
Article
Thermodynamics
Ze Li, Xinyu Gao, Xinyu Huang, Jiayi Gao, Xiaohu Yang, Ming-Jia Li
Summary: The Tactical Unit Algorithm (TUA) is a novel metaheuristic algorithm that demonstrates higher search accuracy, faster convergence, and better stability in solving optimal chiller loading problems.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Weicheng Hu, Qingshan Yang, Ziting Yuan, Fucheng Yang
Summary: A novel hybrid method is proposed for wind farm layout optimization in complex terrain. The method combines computational fluid dynamics simulations with measured wind data to estimate wind resources. An improved genetic algorithm is used for the optimization, and a particle swarm optimization method is introduced to overcome grid limitations.
Article
Thermodynamics
Geng Chen, Shancheng Tao, Ruiqi Liang, Zhaoyu Li, Wenpeng Sun, Jingyuan Xu, Zhibin Yu
Summary: This study constructed a prototype of a solar-powered thermoacoustic engine and tested its performance. The experimental results showed that the engine could resonate at different frequencies and convert solar energy into acoustic power, indicating potential applications.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Dian Huang
Summary: This study investigates the use of multi-nozzles with varying heights in supersonic combustion chambers of scramjets to enhance fuel mixing and distribution. Computational fluid dynamics is used to analyze the impact of different injector height configurations on supersonic cross-flow and evaluate the flow and fuel mixing efficiency. The findings suggest that multi-jet injectors with different heights can significantly improve fuel mixing downstream.
