Article
Thermodynamics
Wayan Nata Septiadi, Gemilang Ayu Iswari, Putu Brahmanda Sudarsana, Gerardo Janitra Puriadi Putra, David Febraldo, Nandy Putra, Teuku Meurah Indra Mahlia
Summary: Nanoparticles can improve the performance of heat pipes by increasing the heat transfer coefficient. The use of Al2O3 and TiO2 as coating materials showed significant differences in performance, with Al2O3 nanoparticle coating outperforming TiO2 nanoparticle coating.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
M. Muneeshwaran, Yun-Jin Lee, Chi-Chuan Wang
Summary: This study aimed to improve the heat transfer performance of heat sinks with vapor chamber heat spreader by developing parallelogram fins integrated with heat pipes. Results showed significant reduction in thermal resistance and chip temperature with the proposed design.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
V. Kannadhasan, A. Senthil Kumar, J. Vairamuthu, R. Nagarajan
Summary: The study showed that CuO nanoparticles significantly reduced the cold-water inlet temperature and increased the heat transfer rate. Simulation results confirmed that lower concentrations of CuO nanoparticles had less impact compared to higher concentrations. The proposed model can be applied to various heat exchanger designs.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
Jiale Huang, Jianhua Xiang, Xuyang Chu, Wenjie Sun, Ruiliang Liu, Weisong Ling, Wei Zhou, Sulian Tao
Summary: The Y-shaped flexible branch heat pipe was designed to improve the thermal performance of the polymer tube. Various structural parameters were studied to investigate their effects on the cooling ability, heat load, thermal resistance, and anti-gravity performance of the flexible heat pipe. The findings show that the thermal resistance and cooling performance are interdependent, and the total cooling performance may degrade if one of the condensers fails.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Muhammad Arif Bin Harun, Prem A. L. Gunnasegaran, Nor Azwadi Che Sidik, M'hamed Beriache, Javad Ghaderian
Summary: The study compared the thermal performance of loop heat pipes using different types of nanofluids, finding that the thermal resistance decreased with increasing mass concentration for diamond and Al2O3 nanofluids, while SiO2 nanofluid showed the opposite trend. Diamond nanofluid exhibited the lowest thermal resistance and better heat capacity and enhancement compared to Al2O3.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Ning Qian, Fan Jiang, Marco Marengo, Yucan Fu, Jiuhua Xu
Summary: Grinding of difficult-to-machining materials generates excessive heat. Radial-rotating oscillating heat pipe (RR-OHP) can enhance heat transfer and control the temperature during grinding. Experimental results demonstrate that RR-OHP improves heat transfer efficiency in grinding process significantly.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Est Dev Patel, Subrata Kumar
Summary: The thermal performance of an asymmetric single-turn closed-loop pulsating heat pipe (aCLPHP) was experimentally investigated. The working fluids exhibited a two-phase oscillatory-circulatory flow in the asymmetric closed-loop due to the capillary pressure difference. The use of adiabatic channels of different cross-sections resulted in a pressure difference, enhancing the flow of heated vapor and liquid. The asymmetry increased the heat carrying capacity for water and acetone by 75% and 50% respectively. The introduction of an asymmetric adiabatic section is a simple and cost-effective approach to improve the capability of a single-turn CLPHP for thermal management.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Ya'nan Zhao, Lingjiao Wei, Jinghui Cai, Jingtao Liang
Summary: This research experimentally studied ammonia-charged micro heat pipe arrays and demonstrated that ammonia could significantly enhance the energy systems based on micro heat pipe arrays for various applications by improving heat transfer capability and enabling energy saving and efficient utilization.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Huanguang Wang, Yuming Tang, Meng Liu, Shuai Zhu, Keqing Zheng, Xueping Du
Summary: Rotating heat pipe has high heat transfer performance, but the research on its heat transfer mechanism is insufficient. This study made a horizontal axially rotating heat pipe and conducted experiments, finding that the optimal filling ratio is about 39.2%.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Thermodynamics
Prem Kumar, Mayur Gachake, Sameer Khandekar
Summary: The study focuses on reducing heat leak in loop heat pipes (LHP) by manipulating the properties of the copper wick, leading to improved thermal performance. It was found that the oxidized copper wick performs better thermally than the pure copper wick, attributed to the lower thermal conductivity of the oxidized porous wick reducing heat leak.
APPLIED THERMAL ENGINEERING
(2022)
Article
Energy & Fuels
Jalal M. Jalil, Hussein S. Mahdi, Asim S. Allawy
Summary: The effects of using phase change material (PCM) on heat sink cooling performance were investigated in this study. The experiments showed that the use of PCM significantly reduced the temperatures of the heat sink. Additionally, the study found that adding nanoparticles to the PCM improved heat sink performance.
JOURNAL OF ENERGY STORAGE
(2022)
Review
Thermodynamics
Hong Li, Hongyuan Liu, Min Li
Summary: This paper provides a comprehensive overview of heat pipe based solar collectors (HP-SCs), summarizing their classification, performance evaluation and optimization, and effective improvements. It discusses the common features and relationships between HP-STCs and HP-PV/T technology. The paper concludes with remarks on application situations, performance analysis and comparison, and identifies new research directions and potentials in this field.
Article
Thermodynamics
Yaohua Zhao, Yubo Wang, Zhenhua Quan, Lincheng Wang, Yuchen Zhang, Qianwen Zhang
Summary: In this paper, a novel micro heat pipe array-phase change thermal storage device (MHPA-PCTSD) with a highly rational heat transfer structure is proposed to improve the thermal storage rate. Numerical modeling and analysis show that the arrangement of the MHPA on both sides of the HTF channel (Type B) has a significant advantage over traditional arrangements, achieving better temperature uniformity and lower thermal resistance.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Huanguang Wang, Yunhao Bao, Shuai Zhu, Meng Liu, Zhonghao Rao
Summary: With the development of applications in the sub-zero temperature region, the potential use of carbon dioxide (CO2) as a working fluid for low temperature heat pipes is explored. Experimental results show promising performance of CO2 heat pipes, with thermal resistance ranging from 0.2-0.4K/W and equivalent thermal conductivity of 3.7 x 10(4) W/(m.K).
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
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)
Review
Thermodynamics
A. L. Sriram Sudhan, K. Ramachandran, A. Brusly Solomon, C. P. Jawahar
Summary: Heat pipes are silent heat transfer devices that utilize boiling and condensation for operation and have undergone several technological upgrades. This paper reviews the performance of heat pipes with nanoparticles deposition and suitable coatings, summarizing various heat transfer mechanisms involved. The study aims to provide a better understanding of the required improvements in cooling devices for future research and development of advanced cooling gadgets.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Materials Science, Multidisciplinary
R. Raja, Lijin George, Sabitha Jannet, Prudthvi Vijay Simha, Sumanth K. Ratna
Summary: In this study, SiC, TiO2, and Biochar were reinforced in Aluminium Alloy 5083 O using stir casting technique. The reinforced composite exhibited higher ultimate tensile strength, ductility, and microhardness, as well as lower wear rate compared to the base metal. FESEM analysis revealed the distribution of particles in the metal matrix.
ADVANCES IN MATERIALS AND PROCESSING TECHNOLOGIES
(2022)
Article
Thermodynamics
Stephen Manova, Lazarus Godson Asirvatham, Jefferson Raja Bose, Trijo Tharayil, Somchai Wongwises
Summary: Experimental investigation on the heat transport capability of a multiport minichannel thermosyphon revealed that the optimal confluence length of 5 mm and inclination angle of 90 degrees resulted in significant enhancements. These enhancements included reductions in thermal resistance and evaporator wall temperature, as well as an increase in evaporator heat transfer coefficient compared to the case with confluence length of 0 mm. Factors contributing to this enhancement included reduced entrainment effect, surface tension effect, and the presence of thin film at flat sides of the multiports.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
A. L. Sriram Sudhan, A. Brusly Solomon, Shyam Sunder
Summary: The study models the heat transport limitations of anodized grooved heat pipes under different gravity conditions, finding that ammonia coolant combined with semi-spherical pores in the anodized grooved heat pipes enhances heat transfer efficiency, especially for space applications.
APPLIED THERMAL ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
R. Raja, Sabitha Jannet, Lenin Dallas, Aibel Sam Saju, S. Rajesh Ruban
Summary: Aluminium metal matrix composites have extensive applications in automobile, aircraft, and marine sectors, making them the subject of extensive research. In this study, AA6063MgO/(Al2O3) flyash hybrid surface composites were fabricated using friction stir processing. The mechanical properties were evaluated, and the results showed that the addition of 12% reinforcement improved the tensile strength and hardness of the material but reduced the elongation.
INTERNATIONAL JOURNAL OF MATERIALS & PRODUCT TECHNOLOGY
(2022)
Article
Engineering, Chemical
Tao Zhang, Xin Guo, Brusly Solomon, Mohsen Sharifpur, Li-Zhi Zhang
Summary: In this study, a hydrophobic-hydrophilic composite hollow fiber membrane with remarkable antiwetting and antifouling properties was successfully prepared to address the issues of membrane fouling and wetting in seawater desalination. The membrane, prepared using a chemical grafting method, exhibited low moisture transfer resistance and a superhydrophobic surface, resulting in a sustained high permeate flux.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
K. Ajith, Mallolu Jesse Aaron, Archana Sumohan Pillai, I. V. Muthuvijayan Enoch, A. Brusly Solomon, M. Sharifpur, J. P. Meyer
Summary: This investigation focuses on the influence of a magnetic field on the thermophysical properties and heat transfer of low-density ferrofluid. The optimal volume fraction of 0.05% was found to have the highest heat transfer performance at a wall temperature difference of 25 degrees C, with significant improvements compared to water.
APPLIED NANOSCIENCE
(2022)
Article
Engineering, Mechanical
R. S. Anand, C. P. Jawahar, A. Brusly Solomon, Evangelos Bellos, X. Ajay Vasanth
Summary: Nanorefrigerants, such as Al2O3/R134a, are found to improve heat transfer and reduce thermal resistance when applied in a two-phase closed thermosyphon. A new correlation is proposed to predict the heat transfer rate of nanorefrigerants in the thermosyphon.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
R. Jesinthaangel, G. Gomathi Jawahar
Summary: The article presents a new oscillation criteria that improves the existing results for the third order neutral delay difference equation with a negative coefficient in the neutral term.
PRZEGLAD ELEKTROTECHNICZNY
(2022)
Article
Thermodynamics
Stephen Manova, Lazarus Godson Asirvatham, Appadurai Anitha Angeline, Sheno Jerbin, Jefferson Raja Bose, Rajesh Nimmagadda, Russel Jayaseelan, Somchai Wongwises
Summary: This experimental study compared the heat transfer performance of copper screen mesh wick and metal foam inserted evaporator section in miniature loop thermosyphon. Results showed that the metal foam had better heat transfer performance compared to the copper screen mesh wick, making it a superior choice for thermal management in electronic devices.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
G. Pitchayyapillai, M. Jinnah Sheik Mohamed, G. Dhanraj, R. Malkiya Rasalin Prince, M. Rajeshwaran, Amol Mangrulkar
Summary: This research investigates the impact of Boron Carbide on the mechanical and tribological behavior of AZ91 Magnesium alloy composite. AZ91 Magnesium Alloy Particulate-reinforced composites were prepared by addressing the wetting problem between B4C and liquid magnesium metal. K2TiF6 was used as a flux and T6 thermal treatment was performed on the produced magnesium B4C composites. The composite with increased ceramic phase exhibited higher hardness compared to the base alloy.
MATERIALS TODAY-PROCEEDINGS
(2022)
Article
Thermodynamics
R. S. Anand, C. P. Jawahar, A. Brusly Solomon, Shibin David, Evangelos Bellos, Zafar Said
Summary: This study focuses on the performance evaluation of thermosyphons using refrigerant R134a and Al2O3/R134 as working fluids. Two novel designs, including internal axial fins and a radial cut or gap in the evaporator section, were proposed to enhance the heat transfer. The results show that the thermal resistance of the proposed designs is significantly decreased compared to the conventional thermosyphon. Experimental investigations with nanoparticle Al2O3 mixed with R134a at a concentration of 1.0% were also carried out, showing further improvement in thermal resistance. Machine learning algorithm was used to validate the experimental results, yielding good agreement between predicted and experimental data.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Sireesha Veeramachaneni, Srinivas Kishore Pisipaty, Dharma Rao Vedula, A. Brusly Solomon, V. Sree Harsha
Summary: A novel hybrid nanofluid has been experimentally tested for its effects on the heat transfer performance of flat rectangular loop heat pipe, showing higher performance than water in terms of thermal resistance and effective thermal conductivity.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
