Article
Green & Sustainable Science & Technology
Mahdi Kazemi, Ali Kianifar, Hamid Niazmand
Summary: The research aimed to investigate the feasibility of using phase change material (PCM) to fabricate an air-PCM heat exchanger for buildings, showing that nano-PCMs can improve heat transfer efficiency and reduce melting and solidification time.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Thermodynamics
Jasim M. Mahdi, Azher M. Abed, Hussein Alawai Al-Saaidi, Nidhal Ben Khedher, Raed Khalid Ibrahim, Mouldi Ben Amara
Summary: This study investigates the effectiveness of a novel central return tube in enhancing heat transfer and accelerating phase transition in a thermal storage system using phase-changing materials (PCMs). The results demonstrate that the return tube significantly improves thermal response and storage performance of the PCM system.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Wenzhu Lin, Ziye Ling, Xiaoming Fang, Zhengguo Zhang
Summary: The thermal performance of a novel spiral-tube heat exchanger latent heat thermal energy storage unit was investigated experimentally and numerically. Results showed an average power higher than 2 kW during the discharging process, and the heat transfer coefficient and area varied with flow rate. A numerical model validated phase change behavior, demonstrating the unit's compact structure and high heat transfer area.
APPLIED THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Alok Kumar, Rohit Agrawal
Summary: The study investigates experimental results of a PCM-based helical coil heat exchanger, showing the charging and discharging time of PCM at different flow rates, as well as a comparison with a regular helical coil heat exchanger. The research also highlights the varying instantaneous effectiveness of the thermal storage unit at different flow rates.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
R. Andrzejczyk, T. Muszynski, M. Fabrykiewicz, M. Rogowski
Summary: This article presents experimental comparison research on a hexagonal shell-and-tube latent thermal energy storage. The study investigated two geometries of helical coils, one simple coil with a small pitch and another one with a larger pitch and enhanced with fins. The results were compared with previous studies on a copper pipe in a cylindrical shell, and a PCM with a melting temperature close to 18 degrees C was chosen for this study.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Thermodynamics
Akshat Patel, Vivek Kumar Singh
Summary: This study aims to improve the energy release and storage rate of PCM heat sinks by employing a novel PCM heat sink with double-sided spiral fins. The results show that increasing the diameter and length of the fins reduces the critical temperature and time taken to reach initial conditions. The best configuration of spiral fins reduces the critical temperature and time by 7 K and 19 mins, respectively, compared to traditional pin fins.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Review
Energy & Fuels
Kin Yuen Leong, Syafawati Hasbi, Balamurugan A. Gurunathan
Summary: Phase change materials (PCMs) are used for storing thermal energy due to their high latent heat and low thermal conductivity. This review discusses factors affecting solidification and melting of PCM in a triplex-tube heat exchanger, including flow rate, temperature, fins, position, heating and cooling, etc. It is found that using fins and nanoparticles in the triplex tube can enhance solidification and melting of PCM.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Energy & Fuels
Farhad Afsharpanah, Khashayar Pakzad, Seyed Soheil Mousavi Ajarostaghi, Sebastien Poncet, Kurosh Sedighi
Summary: Frequent power outages in developing countries lead to food spoilage, where ice storage systems can serve as backup cooling sources. Geometrical optimization of parameters such as helical pitch length can significantly improve the charging rate of ice storage units. The modified Stefan number of refrigerant flow has a considerable impact on the charging rate, while natural convection does not have a noticeable effect on ice formation.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Thermodynamics
Hossein Soltani, M. Soltani, H. Karimi, Jatin Nathwani
Summary: The study investigated the combined effects of using fins and rotation in latent heat thermal energy storage systems, finding that rotational speed has a positive impact on solidification time and heat transfer rate. Additionally, increased rotational speed is directly related to an improvement in heat transfer ratio during the charging and discharging processes.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Mustafa S. Mahdi, Akram W. Ezzat, Hameed B. Mahood
Summary: This study numerically investigates the impact of vertical and horizontal orientations on the longitudinal, spiral, and annular finned shell and tube latent heat energy storage units (LHSUs). The results show that the melting behavior of the LHSUs is significantly influenced by the orientation and the shape of fins, with different melting rates observed in different orientations.
JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS
(2023)
Article
Thermodynamics
Ankur Jain, Mohammad Parhizi
Summary: This paper presents a theoretical analysis of phase change heat transfer in a spherical PCM with an encapsulant layer, considering the effect of thermal contact resistance. The results show that the model accurately describes the phase change heat transfer process and agrees well with numerical simulations. The study analyzes the influence of encapsulant thickness, thermal properties, and thermal contact resistance on phase change propagation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Qinggong Liu, Yao Tao, Long Shi, Yi Huang, Yuanling Peng, Yong Wang, Jiyuan Tu
Summary: This study aims to improve the heat transfer performance of the ground heat exchanger (GHE) through the synergistic effects of structure and material. The results showed that the heat transfer amount increased by 69.9% and the thermal resistance decreased by 81.77% under the synergistic effects of shape-stabilized phase change material (SSPCM) and CuO/water nanofluid. SSPCM backfilling resulted in a ground thermal influence radius that was about 80% of that with sand backfill. Nanofluid and SSPCM promoted and reinforced each other, with a more significant performance improvement effect under the synergistic effects of SSPCM and nanofluid.
Article
Energy & Fuels
Burak Kursun, Mehmet Balta
Summary: Phase change materials (PCMs) are preferred for latent heat storage due to their high energy storage densities and low energy losses. The low thermal conductivity coefficients of PCMs hinder their commercialization and broader applications. Double-pipe energy storage (DPTES) with PCM is suitable for cases where there is a mismatch between the generation and consumption times of thermal energy from sources like solar energy. This study investigates the effects of different inner and outer channel combinations on melting and solidification performance.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Ke Chen, Hayder Mohammed, Jasim M. Mahdi, Alireza Rahbari, Alasdair Cairns, Pouyan Talebizadehsardari
Summary: The study explores the impact of incorporating annular fins with nonuniform distribution on the thermal response of phase change material in a vertical triple-tube heat exchanger. By optimizing the distribution and sizes of the fins, significant uniformity of the melting rate and temperature field can be achieved. The results show improvements in melting time, charging rate, and overall reduction in melting and solidification times compared to cases with no fins.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Ashutosh Sharma, Ranga Pitchumani, Ranchan Chauhan
Summary: This article presents a comparative investigation of different horizontal shell and tube latent heat storage unit (ST-LHSU) designs for melting/solidification performances. The results show that Design-IV has a significantly faster melting rate than Design-III and Design-I, completing the process 25.5% and 37.4% faster, respectively. Furthermore, Design-I is the most effective design for solidification, achieving complete solidification 3.65%, 19.57%, and 45.02% faster than Designs-II, III, and IV. Additionally, modification in Design-I reduces the total thermal cycle time by 24.58%, 37.94%, and 40.21% compared to the original Design-I, Design-III, and Design-IV.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Mohamed Ibrahim N.H., M. Udayakumar, Sivan Suresh, Suvanjan Bhattacharyya, Mohsen Sharifpur
Summary: This study investigates the insights of soot formation in ethylene/hydrogen/nitrogen diffusion jet flame, including soot volume fraction as a function of flame-normalized length and various soot formation rates. The originality of this study lies in coupling LES turbulent model with chemical equilibrium diffusion combustion and conducting SVF and its insights study for different Reynolds number configurations.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2021)
Review
Thermodynamics
Mahmood Mastani Joybari, Hakon Selvnes, Alexis Sevault, Armin Hafner
Summary: Shell-and-tube heat exchangers have long been the industry's most common choice, but pillow-plate heat exchangers have gained a growing market share in recent years. This study aims to fill the literature gap by systematically and critically surveying earlier studies on pillow-plate heat exchangers and providing an in-depth discussion on the achievements so far.
APPLIED THERMAL ENGINEERING
(2022)
Article
Chemistry, Physical
Qusay Hassan, Marek Jaszczur, Saadoon Abdul Hafedh, Majid K. Abbas, Ammar M. Abdulateef, Ali Hasan, Jasim Abdulateef, Abdulmajeed Mohamad
Summary: This study examined the usage of fuel cells for energy storage in microgrid energy systems. The findings show that using fuel cells powered by hydrogen generated by renewable energy systems can significantly increase self-consumption and self-sufficiency.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Review
Thermodynamics
Zeng Chao, Yuan Yanping, Fariborz Haghighat, Karthik Panchabikesan, Mahmood Mastani Joybari, Cao Xiaoling, Lubomir Klimes
Summary: This review paper critically analyzes the recent literature on latent heat thermal energy storage systems in buildings, consolidating commercial software and in-built codes used for mathematical modeling. It also provides suggestions for future works to develop PCM-based thermal energy storage systems more effectively.
JOURNAL OF THERMAL SCIENCE
(2022)
Article
Energy & Fuels
Qusay Hassan, Marek Jaszczur, Ammar M. Abdulateef, Jasim Abdulateef, Ali Hasan, Abdulmajeed Mohamad
Summary: This research evaluates the use of a supercapacitor module as an energy storage unit for renewable energy systems. The study shows that the use of the supercapacitor module can meet the rapid peaks of electrical load and significantly increase energy self-consumption and self-sufficiency.
Article
Construction & Building Technology
Soroush Samareh Abolhassani, Mahmood Mastani Joybari, Mirata Hosseini, Mojtaba Parsaee, Ursula Eicker
Summary: Global warming has significantly impacted communities, health, and infrastructure. Previous studies have shown that climate change leads to warmer temperatures, affecting the heating and cooling needs as well as thermal performance of buildings. Analyzing how buildings respond to climate change in terms of energy consumption is crucial for future energy planning and decision-making. However, the existing literature lacks a coherent approach, making it difficult to draw universal conclusions. This study introduces a step-by-step procedure to harmonize future research and guide building impact assessment under climate change.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Thermodynamics
Mahmood Mastani Joybari, Hakon Selvnes, Erling Vingelsgard, Alexis Sevault, Armin Hafner
Summary: This study conducted a parametric study on the design and operational parameters of an industrial-scale pillow plate heat exchanger with carbon dioxide. The results showed that the difference between refrigerant and carbon dioxide phase change temperatures and plate material had the highest significance on storage size and cost, while the refrigerant flow rate had the lowest significance.
APPLIED THERMAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Ammar M. Abdulateef
Summary: This research aims to enhance energy transfer by using nanofluids, which are compatible with heat exchanger thermal energy storage (HXTES) applications. A triplex tube heat exchanger (TTHX) was designed to receive hot and cold flows from two thermal baths, and the heat transfer efficiency of the nanofluid with different Cu volume concentrations was evaluated.
Review
Chemistry, Physical
Qusay Hassan, Ammar M. Abdulateef, Saadoon Abdul Hafedh, Ahmed Al-samari, Jasim Abdulateef, Aws Zuhair Sameen, Hayder M. Salman, Ali Khudhair Al-Jiboory, Szymon Wieteska, Marek Jaszczur
Summary: Hydrogen is a promising fuel for eco-friendly energy sources and can be derived from renewable sources. However, renewables-to-hydrogen methods are still in their early stages and require substantial work for widespread recognition in sustainability strategies. This analysis extensively reviews renewables-to-hydrogen technologies, highlighting current states and potential improvements in areas such as efficiency, emissions, costs, mobility, and public acceptance. The study identifies the urgent need for incorporating renewable energy, reducing production costs, and addressing the lack of techno-economic and ecological analyses for renewables-to-hydrogen pathways. The results will facilitate the safe utilization of hydrogen in large energy facilities.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Green & Sustainable Science & Technology
Sudhir Kumar Pathak, V. V. Tyagi, K. Chopra, A. K. Pandey, Ahmet Sari, Ammar M. Abdulateef
Summary: This study proposes a novel method of incorporating a phase-change material (PCM) in a solar water heater, which can store excess heat and provide hot water even in low-sunshine conditions. The system achieves energetic and exergetic efficiencies of 76.57% and 79.64% for clear weather, and 2.37% and 1.38% for cloudy weather, respectively.
Article
Thermodynamics
Ammar M. Abdulateef
Summary: This research aims to determine the relationship between various parameters to evaluate the thermal performance of steam condenser unit. Experimental work is conducted with different condensate mass flow rates. The non-invasive method of Logarithmic Mean Temperature Difference is used to simulate the work. The findings validate the significance of cold water temperature, flow rate, condenser pressure, and heat transfer coefficient on the steam condenser.
INTERNATIONAL JOURNAL OF HEAT AND TECHNOLOGY
(2023)
Article
Energy & Fuels
Mohammed Fareed Rahi, Muslum Arici, Ammar M. Abdulateef, Hakeem Niyas
Summary: Globally, the building sector is experiencing a surge in energy demand due to rising temperatures, population growth, urbanization, and improved living standards. This paper investigates the effective utilization of macro-encapsulated phase change material (PCM) in reinforced cement concrete (RCC) roof slabs to enhance their thermal performance. The study explores the impact of PCM shape, heat transfer area, and thermal shading on the reduction of inner roof temperature. Various cases are examined, and the structural performance of the RCC conventional slab and slab with PCM capsules is also analyzed. The findings suggest that a cuboid shape with less thickness, increased heat transfer area, and thermal shading can significantly reduce roof temperature.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Materials Science, Multidisciplinary
H. Vishnu Nandan, R. Anish, G. Jayaprasad, Subin Sunny, Jackson Scaria Jomon, R. Shibin, J. B. Sajin
Summary: Increasing concerns about environmental pollution have prompted researchers to seek sustainable alternatives. This study focuses on the fabrication and experimental validation of a hybrid bio composite using coir and cotton fiber reinforcement dispersed in a paper matrix. The results show that the specimen with 20 wt% coir has better tensile strength and Izod impact value compared to the standard sample, while maintaining thermal stability comparable to conventional packaging materials.
Article
Thermodynamics
Yunxia Ma, Fei Liu, Honggang Pan, Hongjian Zhang, Shuxia Yan, Ailing Zhang
Summary: This paper proposes a dynamically tunable and switchable perfect infrared absorber that exhibits excellent electrical regulation performance and high absorptance. The absorption mechanism is explained using a multiple interference model, and it is proven to be polarization insensitive.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
F. J. dos Santos, G. S. M. Martins, M. Strobel, L. Beckedorff, K. V. de Paiva, J. L. G. Oliveira
Summary: This study investigates the effects of inlet conditions and plate's features on the thermal-flow performance of a gasket plate heat exchanger (GPHE) and assesses the impact of a modified tightening distance on its performance. No systematic study on the combined effects of inlet conditions and assembly accuracy on GPHE performance has been conducted before.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Alok K. Ray, Dibakar Rakshit, K. Ravi Kumar, Hal Gurgenci
Summary: The low thermal conductivity of phase change materials limits the heat transfer rate and application of latent heat storage systems. This numerical study examines the impact of two passive heat transfer enhancement techniques on the thermal performance of a latent heat storage system. The results show that the orientation and position of the heat transfer fluid tube have significant effects on the charging duration, while the discharging duration remains unchanged. The combined effect of orientation and eccentricity reduces the charging duration, but increases the discharging duration compared to the concentric domain.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Yalu Han, Yanlong Wang, Chenyang Liu, Xinmin Hu, Yin An, Zhengcai Li, Jiaxun Jiang, Lizhi Du
Summary: This paper investigates the calculation method of thermal conductivity in NAPLs-contaminated soils. By establishing NAPLs-contaminated soil models and using the Lattice Boltzmann Method (LBM) for calculation, an optimized three-dimensional model with high computational accuracy and efficiency is obtained. The study also finds that saturation and Nz parameters have a significant impact on calculation time, while the thermal conductivity of the two-dimensional model is more sensitive to anisotropy. The influence of porosity and NAPLs content on thermal conductivity should be considered during in-situ thermal desorption.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Mostafa Taha, Song Zhao, Aymeric Lamorlette, Jean-Louis Consalvi, Pierre Boivin
Summary: For the first time, large-eddy simulations (LES) of the near-field region of large-scale fire plumes were performed using a pressure-based Lattice Boltzmann method (LBM) with low-Mach number approximation. The simulations showed quantitative agreement with experimental data and were consistent with previously-published numerical studies. The study demonstrated the computational efficiency of the proposed LBM solver in tackling fire-induced flows, suggesting LBMs as a good alternative candidate for modeling fire-related problems.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Weixin Zhang, Yehang Xie, Yuqiang Ding, Zhao Liu, Zhenping Feng
Summary: This study investigated the impact of upstream slot leakage on the endwall film cooling characteristics of turbine blades. Pressure Sensitive Paint (PSP) technology was used to measure the film cooling characteristics, and numerical analysis was conducted to evaluate the aerodynamic performance. It was found that increasing the mass flow ratio of the upstream slot enhanced film cooling, decreased aerodynamic losses, and reduced the strength of passage vortex. However, reducing the distance between the slot and the blade leading edge only enhanced film cooling without affecting the leakage coverage area.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Rui Zhang, Zhen-lei Li, Yan-sheng Zhang, Dong Chen, Guo Yuan
Summary: This study discusses the heat transfer behavior of different jet forms on steel tubes. The results show that the annular jet performs better in terms of cooling intensity and uniformity. The cooling performances of the two jet forms are similar when the steel tube size is small. Therefore, the planar jet can be considered for smaller diameters due to its simplicity, low cost, and convenience in application.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
A. R. Khoei, A. M. Orvati Movaffagh, A. Rezaei Sameti
Summary: This paper presents a comprehensive study on the thermo-mechanical characteristics of oxide-coated aluminum nano-powder. It is found that the thermal conductivity of oxide-coated aluminum nano-powder is significantly lower than that of the bulk aluminum, and it is affected by the density and temperature.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Yanjin Wang, Jintao Xiong, Lingyu Chen, Zhihai Lv, Qian Wang
Summary: A solar radiation transfer model for spray cooling double skin facade (SC-DSF) is proposed in this study. The model is validated by experimental results and various influence factors are analyzed. The effectiveness of adjusting droplet coverage rate and size is also evaluated.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Bostjan Zajec, Blaz Mikuz, Anil Kumar Basavaraj, Marko Matkovic, Matej Tekavcic, Martin Draksler, Leon Cizelj, Bostjan Koncar
Summary: We have developed an advanced experimental setup to investigate flow and heat transfer in an annular channel. The setup allows heat transfer measurements and flow visualization using a temperature-controlled inner tube. Measurements can be conducted in both single-phase and two-phase flow regimes. The setup ensures a uniform velocity field in the annular channel using specially designed inlet and outlet headers. The inner copper tube is heated by water and contains turbulators for enhanced heat transfer and thermocouples for temperature measurement. A three-dimensional conjugate heat transfer CFD model has been developed and validated to accurately estimate heat losses in the setup. This study demonstrates the importance of numerical simulations in improving the interpretation of complex experimental results.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Weijie Chen, Ke Wang, Yongqing Wang, Shantung Tu, Zunchao Liu, Huijuan Su
Summary: In this study, a novel gradient porosity transpiration cooling plate structure (GP-TCPS) is proposed to alleviate heat transfer deterioration caused by non-uniform temperature distribution in transpiration cooling plate structure (TCPS). Computational fluid dynamics (CFD) and response surface method (RSM) were used for qualitative and quantitative analysis of the flow and heat transfer of GP-TCPS. The optimized structure of GP-TCPS significantly improves temperature uniformity, injection pressure, and average cooling efficiency compared to traditional TCPS.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
R. Essam, A. Elsaid, W. K. Zahra
Summary: This study presents a novel bioheat model for simulating heat transfer in skin tissue. The model offers an improved representation of thermal dynamics in the skin and has been validated using numerical solutions and experimental measurements. The study highlights the importance of incorporating vascular inlet parameters and thermal relaxation effects in the thermal profile, and suggests potential applications in thermal therapy and wound healing.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Dongbo Shi, Tao Xu, Zifeng Chen, Di Zhang, Yonghui Xie
Summary: The cooling structure design of turbine blades is crucial for the safety and reliability of the gas turbine set. This research investigates different arrangement schemes, including dimple/protrusion arrangements, to enhance the cooling performance. The results show that the arrangement scheme with both passes arranged by dimples has the best comprehensive thermal performance.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Emrehan Guersoy, Hayati Kadir Pazarlioglu, Mehmet Guerdal, Engin Gedik, Kamil Arslan
Summary: The thermo-hydraulic performance of Al2O3/H2O nanofluid with different nanoparticle shapes flowing in a sudden expansion tube with variable sudden expansion inclination angles and elliptical dimpled fins with different diameters were numerically investigated. The results showed that the nanoparticle shapes, sudden expansion inclination angles, and elliptical dimpled fin have significant impact on the thermo-hydraulic performance. This study reveals the novelty and importance of these factors in the research.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Rukun Hu, Xinyu Huang, Xinyu Gao, Liu Lu, Xiaohu Yang, Bengt Sund
Summary: This study examines the impact of applying bottom cross-cut on PCM's spatial distribution in a horizontal LHTES unit using numerical simulation. The findings show that bottom cross-cut can improve the heat storage rate and natural convection heat transfer gain.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
