Article
Energy & Fuels
Amin Shahsavar, Abbas Goodarzi, Pouyan Talebizadehsardari, Mulsum Arici
Summary: This study investigated the phase change process in a double-pipe latent heat storage system with sinusoidal wavy fins, which resulted in significant efficiency improvements. The best wave profile was determined to have a wave-amplitude of 2 mm and a wavelength of 1 mm. Additionally, the characteristics of the water flow in the system were found to impact performance.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
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
R. A. Nicholls, M. A. Moghimi, A. L. Griffiths
Summary: This study investigates the impact of fin type and orientation on the charging and discharging processes of a horizontal concentric filled with phase change material. The results show that the performance is significantly improved with the use of transversal corrugated fin design. The melting process is mainly influenced by natural convection, while conduction is the main mode of heat transfer in the solidification process. The transversal corrugated fin design outperforms other cases in terms of melting time reduction, and the overall processing time is significantly shorter.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Green & Sustainable Science & Technology
Amin Shahsavar, Amir Hossein Majidzadeh, Roohollah Babaei Mahani, Pouyan Talebizadehsardari
Summary: This paper investigates the entropy analysis and thermal performance evaluation of a wavy-channels triplex-tube latent heat storage heat exchanger during melting and solidification mechanisms. Results show that a higher wave amplitude leads to shorter melting and solidification times, and entropy generation plays a crucial role in the performance of the heat exchanger.
Article
Energy & Fuels
Muhammad Asjid, Majid Ali, Adeel Waqas, Adeel Javed, Nadia Shahzad, Ali Abdullah, Muhammad Umar Iqtidar
Summary: Thermal Energy Storage systems utilizing phase change materials (PCM) are effective in improving the reliability of thermal energy systems. This study focused on numerically investigating the charging and discharging processes of N-eicosane in a circular-stadium double pipe TES system, revealing that the X/Y=0.15 case with a 90-degree angular orientation provides the best thermal performance. The findings showed a significant increase in charging rate, with minimal impact on discharging rate, while the overall efficiency of the system increased by 26% compared to the base case.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Thermodynamics
Abdullah N. Olimat, Mohammad Ismail, Nabeel Abu Shaban, Ahmad AL-Salaymeh
Summary: The effects of pipe orientation angle on the performance of latent heat thermal energy storage systems were investigated. It was found that increasing the orientation angle of the pipe can reduce the melt fraction and increase the melting time and absorbed heat flux. However, the orientation angle has no impact on the solid fraction during solidification.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Review
Green & Sustainable Science & Technology
M. Eslami, F. Khosravi, H. R. Fallah Kohan
Summary: This paper provides a comprehensive review of various fin designs proposed for latent heat thermal energy storage systems, discussing the effects of different geometrical parameters. The study shows that an optimum number of fins, spacing, and length can be found in each case, while some parameters such as fin thickness are less important.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Thermodynamics
Javid Zamani, Ali Keshavarz
Summary: Nowadays, the world is facing an energy crisis, with residential buildings in developed countries accounting for a significant portion of global energy demand. To achieve sustainable energy systems, it is crucial to reduce energy consumption in this sector. The use of phase change materials (PCMs) in energy systems is identified as one of the feasible solutions. This study focuses on investigating the application of PCMs in a dual-pipe latent heat exchanger system for thermal energy storage, with the aim of optimizing the charging and discharging operations to enhance energy efficiency and minimize exergy destruction.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Energy & Fuels
Medhat M. Sorour, Mohamed A. Hassab, Mostafa M. Zaytoun, Mohamed A. Alnakeeb
Summary: This study investigates the melting process of PCM in a double-pipe latent heat storage unit at different inclinations. The optimal inclination angle is found to be 45 degrees for thick PCM thickness, while the horizontal orientation is most suitable for thin PCM thickness according to experimental and numerical results.
JOURNAL OF ENERGY STORAGE
(2021)
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)
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
Devendra Raut, Suraj Londhe, V. R. Kalamkar
Summary: This study investigated the effect of connection and flow parameters during charging and discharging processes, finding that the series arrangement is better than the parallel arrangement under all flow conditions.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Mehdi Eisapour, Amir Hossein Eisapour, A. H. Shafaghat, Hayder I. Mohammed, Pouyan Talebizadehsardari, Zhangxin Chen
Summary: This study investigates an optimal model for heat recovery from a double elliptical latent heat storage system using wavy inner tubes and nano-enhanced phase change material. The findings show that a vertical alignment of the inner tube compound in the center of the outer tube results in higher efficiency. Using double pipes, both straight and wavy, increases the surface area and enhances the heat transfer rate. Adding SiC nanoparticles to the PCM accelerates the solidification rate, and lowering the temperature of the heat transfer fluid reduces the total solidification time.
Article
Energy & Fuels
Nidhal Ben Khedher, Jasim M. Mahdi, Anmar Dulaimi, Ilia Shojaeinasab Chatroudi, Mohammadreza Ebrahimnataj Tiji, Raed Khalid Ibrahem, A. Yvaz, Pouyan Talebizadehsardari
Summary: Phase-change materials (PCMs) have the potential to address the mismatch between energy supply and demand due to their energy savings, uniform operating temperature, and low cost. This study demonstrates the advantage of using arc-shaped fins as thermal enhancers to improve the thermal functionality of PCM in a storage system. Parametric studies show that modifying the dimensions and angles of the fin configuration can further enhance the heat storage rate.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Xuan Zhang, Chengbin Zhang, Yongping Chen
Summary: This study investigates the thermal management effectiveness of a heat pipe coupled with phase change material (PCM) based latent heat storage (LHS) system for high heat loads in electronic devices. Both experimental and theoretical analyses show that arranging PCM units at the evaporator section optimizes the system's performance under intermittent heat load conditions by stabilizing the heat source temperature and improving temperature uniformity.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Energy & Fuels
Muhammad Usman Sajid, Hafiz Muhammad Ali, Yusuf Bicer
Summary: This study analyzed the impact of different factors on the thermal and exergetic performances of corrugated minichannel heat sinks and compared the thermal performance between different coolants. The results showed that the heat sink with the smallest wavelength and amplitude had the lowest wall temperature, and the use of nanofluid increased the Nusselt number of the heat sink.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Engineering, Chemical
Aimad Koulali, Adel Sahi, Bachir Meziani, Abderrahmane Aissa, Djamel Sadaoui, Hafiz Muhammad Ali
Summary: This study focuses on using corrugated bottoms to improve the heat performance of cavities filled with two fluid layers. Computational methods are used to analyze the thermal and hydrodynamic fields in the two-layer system. The results show that corrugated bottoms can significantly enhance the thermal performance of these cavities, with optimal values of wavelength and amplitude leading to maximum heat transfer rates.
CHEMICAL ENGINEERING COMMUNICATIONS
(2023)
Article
Engineering, Chemical
Fazle Hadi, Hafiz Muhammad Ali
Summary: The study experimentally analyzes a super hydrophobic wavy mini channel heat sink using SiO2 and TiO2 aqueous nanofluids. The results show that the super hydrophobic heat sink significantly enhances heat transfer while reducing pressure drop, thus reducing power consumption.
CHEMICAL ENGINEERING COMMUNICATIONS
(2023)
Review
Engineering, Chemical
Sumbul Purree, Muhammad Nadeem, Azeem Shahzad, Hafiz Muhammad Ali
Summary: Nanofluids, as advanced heat transfer fluids with high thermophysical properties, have gained attention. However, the low stability and shelf life hinder the commercialization of nanofluids.
CHEMICAL ENGINEERING COMMUNICATIONS
(2023)
Article
Green & Sustainable Science & Technology
Hafiz Muhammad Habib, Hafiz Muhammad Ali, Muhammad Usman
Summary: Condensers in air conditioning systems rely on heat transfer, with fin tubes being widely used for their enhanced capabilities. This study examined the impact of adjusting fluid flow rates on retention angle and found that an increase in propanol concentration at 0.04% significantly improved retention angle.
Article
Green & Sustainable Science & Technology
Amin Shahsavar, Pouyan Talebizadehsardari, Muslum Arici
Summary: A comparative study was conducted to evaluate a hybrid building integrated photovoltaic/thermal system and earth-air heat exchanger in comparison to individual systems. The outcomes revealed that the hybrid system outperformed in terms of energy production and the system parameters had an impact on its economic and environmental performance.
JOURNAL OF CLEANER PRODUCTION
(2022)
Review
Chemistry, Multidisciplinary
Aoha Roohi Amin, Ahsan Ali, Hafiz Muhammad Ali
Summary: This paper explores the application of nanofluids in machining operations. By using different types of nanoparticles and base fluids, nanofluids can enhance lubrication and cooling, improve machining quality and tool life. Nanofluids are more effective than regular lubricants, with hybrid nanofluids being the most efficient.
Article
Engineering, Multidisciplinary
Koorosh Khosravi, Amir Hossein Eisapour, Alireza Rahbari, Jasim M. Mahdi, Pouyan Talebizadehsardari, Amir Keshmiri
Summary: This study proposes an innovative configuration of a PV-T system with wavy tubes and twisted-tape inserts to improve energy and exergy efficiency. A parametric study in Shiraz, Iran, shows that employing twisted tape increases energy and exergy efficiency by approximately 6.3%. The best configuration results in a 12.4% and 16.8% increase in energy and exergy efficiency compared to conventional PV systems.
ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS
(2023)
Article
Energy & Fuels
Abdullah Bahlekeh, Hosseinali Ramezani Mouziraji, Hussein Togun, Abolfazl Ebrahimnataj Tiji, Azher M. Abed, Hayder I. Mohammed, Raed Khalid Ibrahem, Muataz S. Alhassan, Pouyan Talebizadehsardari
Summary: This study numerically analyzed the impact of fin number and size on the solidification output of a double-tube container filled with phase change material (PCM). By changing the dimensions of the fins, the heat transfer performance of PCM was examined and compared to scenarios without fins. Multiple inline configurations were explored to achieve optimal performance. The initial conditions of the heat transfer fluid (HTF) were considered in the analysis. The results showed that longer fins with higher numbers significantly improved the solidification rate of PCM.
ENERGY SCIENCE & ENGINEERING
(2023)
Article
Engineering, Mechanical
Mohd Zaki Sharif, Wan Hamzah Azmi, Mohd Fairusham Ghazali, Nurul Nadia Mohd Zawawi, Hafiz Muhammad Ali
Summary: In the field of sustainable tribology, researchers are studying the incorporation of nanoparticles into lubricants to enhance tribological performance. However, this approach may lead to increased lubricant viscosity. This study aimed to evaluate the impact of nanoparticles on the viscosity and coefficient of friction (COF) of nanolubricants. Different types of nanolubricants were synthesized and their viscosity and COF were measured. The results showed that the combination of nanoparticles, temperature, and volume concentration significantly influenced the viscosity and COF of nanolubricants.
Article
Engineering, Mechanical
Mohd Farid Ismail, Wan Hamzah Azmi, Rizalman Mamat, Korada Viswanatha Sharma, Hafiz Muhammad Ali
Summary: Proper preparation and stability evaluation of nanolubricant are crucial in the application of nanoparticle dispersion technique in a two-phase system. The stability of nanolubricant ensures maximum benefit from nanoparticle dispersion in specified Polyvinyl ether (PVE). In this study, TiO2/PVE nanolubricant was prepared using two physical homogenization methods: high-speed homogenizer (HSH) and ultrasonication bath. The stability of the nanolubricant was evaluated using various techniques, and results showed that ultrasonication homogenizing methods had better stability with a zeta potential of over 60 mV.
Article
Ecology
Saad Saeed, Abid Hussain, Imran Ali, Hanzla Shahid, Hafiz Muhammad Ali
Summary: In this study, a novel thermal management system based on forced air cooling with three airflow configurations is developed to explore their thermal characteristics. It was found that the axial flow configuration has the best cooling effectiveness.
Article
Energy & Fuels
Koorosh Khosravi, Hayder I. Mohammed, Jasim M. Mahdi, Mahyar Silakhori, Mohammadreza Ebrahimnataj Tiji, Arash Kazemian, Tao Ma, Pouyan Talebizadehsardari
Summary: A three-dimensional numerical simulation and optimization method were used to evaluate and improve the efficiency of photovoltaic solar modules connected with linear pipes for water supply. The study found that the thermal exergy effectiveness plays a crucial role in system performance. Single-objective optimization showed that maximizing heat transfer efficiency, whole energy effectiveness, or thermal exergy efficiency, or minimizing destroyed exergy, improved energy and exergy efficiencies. Multi-objective optimization indicated that the optimized results were within desirable limits. These findings provide valuable insights for designing high-efficiency photovoltaic/thermal systems.
Article
Construction & Building Technology
Nidhal Ben Khedher, Hussein Togun, Azher M. Abed, Hussein M. Taqi Al-Najjar, Anmar Dulaimi, Hayder I. Mohammed, Jasim M. Mahdi, A. Yvaz, Pouyan Talebizadehsardari
Summary: This study investigates the effect of circular Y-shaped fin arrangement on the low thermal response rates of a heat exchanger with Paraffin phase change material. Computational fluid dynamic simulations are conducted using ANSYS software, considering fluid flow, heat transfer, and phase change process. The optimal fin configuration is determined through sensitivity analysis of the Y-shaped fin's geometrical parameters. Results show that using Y-shaped fins reduces solidification time by 22% and enhances discharging rate by 26% compared to straight fins. The length of the fins is inversely proportional to solidification time, and increasing the number of fins improves heat transfer rate significantly.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Energy & Fuels
Nidhal Ben Khedher, Jasim M. Mahdi, Anmar Dulaimi, Ilia Shojaeinasab Chatroudi, Mohammadreza Ebrahimnataj Tiji, Raed Khalid Ibrahem, A. Yvaz, Pouyan Talebizadehsardari
Summary: Phase-change materials (PCMs) have the potential to address the mismatch between energy supply and demand due to their energy savings, uniform operating temperature, and low cost. This study demonstrates the advantage of using arc-shaped fins as thermal enhancers to improve the thermal functionality of PCM in a storage system. Parametric studies show that modifying the dimensions and angles of the fin configuration can further enhance the heat storage rate.
JOURNAL OF ENERGY STORAGE
(2023)
