Article
Multidisciplinary Sciences
Amir Aghamohammadi, M. Ebrahim Foulaadvand
Summary: In this study, we investigate the best orientation for a fixed flat plate solar collector using the clear sky model. Ground reflection is ignored due to its small magnitude compared to direct beam and sky diffusive components. Our analysis shows that the most effective azimuthal angle, regardless of latitude, is 0 (North-South direction). The optimal tilt angle depends on both the Day of Year and the collector's latitude and we calculate it for mid-altitude climate zones.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Analytical
Henrik Zsiboracs, Gabor Pinter, Andras Vincze, Nora Hegedusne Baranyai
Summary: This paper introduces a new active sensor-tracking algorithm for photovoltaic systems, which aims to solve the issues of traditional solutions and has been tested and patented. Based on the concepts of periodic movement and almost horizontal positioning, this system extends system lifetime, enhances resistance to storm damages, and achieves sun tracking practically without decreasing power compared to the focal point position.
Article
Environmental Sciences
Sonia Z. Issaq, Shamil K. Talal, Aasim A. Azooz
Summary: A new model has been developed to determine the optimal tilt angle for PV panels and solar collectors based on yearly, seasonal, and monthly basis. The model estimates the diffusion component of solar radiation using Orgill and Holland's model, and the relationship between diffusion and direct components is derived from empirical data. The optimal tilt angle for each month, season, and year is determined by maximizing the total amount of diffused and direct radiation. The model is programmed in MATLAB and is consistent with experimental data and other published model predictions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Environmental Sciences
Athikesavan Muthu Manokar, Alagar Karthick
Summary: The solar-powered water heating method is a more efficient way to utilize thermal energy compared to electrical water heating systems. The Concrete Collector Solar Water Heating System, which can be used for space cooling and hot water production, plays an important role in various sectors such as households, industry, hostels, and hotels. Future research opportunities in this field are also highlighted in this review.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Thermodynamics
Sakhr M. Sultan, M. Z. Abdullah, H. M. Hussein, C. P. Tso, K. Sopian
Summary: The photovoltaic solar thermal collector (PVT) is a hybrid technology that generates heat and electricity simultaneously, with recent research focusing on improving its performance. This paper aims to incorporate manufacturing cost into existing methods by introducing factors such as yield per area per cost, yield per volume per cost, and yield per weight per cost to determine the optimal PVT design. The modified methods can help classify PVT designs based on energy output, area, volume, weight, and manufacturing cost.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
A. Allouhi, M. Benzakour Amine
Summary: This study aims to characterize the performance of a heat pipe flat plate solar collector using different nanofluids, with CuO-based nanofluid showing the highest enhancements in energetic and exergetic efficiencies. The decrease in specific heat of nanofluids is identified as the main thermal property responsible for performance improvement.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Green & Sustainable Science & Technology
Taher Ghalandari, Alalea Kia, David M. G. Taborda, Wim Van den Bergh, Cedric Vuye
Summary: Recent studies have investigated the thermal performance of Pavement Solar Collectors (PSC) and proposed a new approach to assess their long-term performance using Response Surface Methodology (RSM) and Finite Element (FE) simulation. The study successfully developed statistical prediction regression models to represent the experimental data and optimize the design parameters. The proposed multi-objective optimization framework using NSGA-II aims to find Pareto front solutions in the design space.
Article
Green & Sustainable Science & Technology
M. Ebrahim Foulaadvand, Amir Aghamohammadi
Summary: This study evaluates the daily beam energy received by different convex surfaces using analytical and numerical methods. It finds that a flat surface receives the highest beam energy among other convex surfaces in clear sky conditions, while a sphere receives the least. When considering the energy received per unit of the ground-occupied area, a range of cylindrical surfaces with different radius to height ratios receive the highest amount of energy.
JOURNAL OF RENEWABLE AND SUSTAINABLE ENERGY
(2023)
Article
Green & Sustainable Science & Technology
Juan Camilo Lopez, Alejandro Escobar, Daniel Alejandro Cardenas, Alvaro Restrepo
Summary: This paper compares the exergy performances of two different types of solar thermal collectors in a sugarcane cogeneration power plant in Colombia. The introduction of solar thermal collectors can effectively reduce fuel consumption, with parabolic trough collector outperforming linear Fresnel collector in heat generation.
Article
Multidisciplinary Sciences
Xuecheng Wang, Xing Gao, Yuming Wu
Summary: Solar photovoltaic (PV) is popular in the market due to its clean and renewable features. It is crucial to conduct comprehensive analysis of rooftop PV projects in tropical regions for effective policy-making. This study focuses on Nanning and evaluates the optimal PV installation options for different roof types, estimating electricity generation potential and additional returns. The findings reveal the optimal azimuth and tilt angles for Nanning, suggesting practical strategies for rooftop PV installation based on roof types. The total potential of rooftop PV projects in Nanning is estimated to be 19.99 TWh/year, resolving 76.1% of the social electricity demand. This research provides valuable insights for rooftop PV installation and optimization in tropical regions of China and serves as a reference for other areas.
Article
Thermodynamics
Taher Ghalandari, David Ceulemans, Navid Hasheminejad, Gert Guldentops, Wim Van den Bergh, Ivan Verhaert, Cedric Vuye
Summary: In this paper, a simplified simulation model was developed to predict the performance of PSC systems at the design stage. Sensitivity analysis on different design parameters showed that the efficiency index increases with an increase in pipe spacing, pipe embedment depth, and flow rate, while it decreases with an increase in the asphalt thermal conductivity in the wintertime. Additionally, variations of the heat transfer coefficient UA* and correlation parameter k in different PSC configurations were established.
APPLIED THERMAL ENGINEERING
(2021)
Review
Energy & Fuels
P. Jha, B. Das, R. Gupta, J. D. Mondol, M. A. Ehyaei
Summary: Photovoltaic (PV) technology is impacted by elevated temperatures, leading to the introduction of photovoltaic thermal collector (PVTC) systems. This review focuses on the design and development of heat exchangers used in air and water-based PVTC systems. Heat exchangers improve heat transfer from the back surface of PV modules, enhancing overall efficiency. Air-based PVTC systems achieve electrical efficiency ranging from 4% to 24%, while water-based systems reach 5.1% to 15.8%. Thermal efficiency is higher in air-based systems (87%) compared to water-based systems (72%), indicating significant progress. Future recommendations for enhancing PVTC systems are also discussed.
Review
Thermodynamics
Arvind Kumar, Zafar Said, Evangelos Bellos
Summary: The evacuated tube solar collector is a suitable solar technology for producing useful heat in various climate conditions. Design parameters such as tracking system, collector design, mass flow rate, optical design, and working fluid play crucial roles in influencing the performance of the collector.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Green & Sustainable Science & Technology
Ali Saleh Aziz, Mohammad Faridun Naim Tajuddin, Mohd Rafi Adzman, Makbul A. M. Ramli
Summary: This study investigated the impact of temperature, tilt and azimuth angles, and ground reflectance on the performance of a solar energy system in Choman, Iraq. The results showed that facing PV panels to the south with a tilt angle of 40 or 45 degrees resulted in the most economical system. Increasing ground reflectance from 10% to 90% led to changes in the annual optimum tilt angle and PV required capacity.
ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY
(2021)
Article
Engineering, Electrical & Electronic
Vineet Singh, Vinod Singh Yadav
Summary: This research optimized the input parameters of a solar pump based on experimental data to improve performance, finding the optimal tilt angle and surface azimuth angle to be 18.2291 degrees and 6.2568 degrees respectively.
IETE JOURNAL OF RESEARCH
(2022)
Article
Mechanics
Pouyan Talebizadehsardari, H. Salehipour, D. Shahgholian-Ghahfarokhi, A. Shahsavar, M. Karimi
Summary: This article presents a closed-form solution for vibration analysis of macro-micro-nano plates and shells made of unit material with functionally graded porosity.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Thermodynamics
Ramin Mashayekhi, Hossein Arasteh, Pouyan Talebizadehsardari, Apurv Kumar, Morteza Hangi, Alireza Rahbari
Summary: By simulating the effects of different design parameters, it is found that inserting twisted tape inside a plain tube can significantly enhance heat transfer performance, with rotating twisted tape showing more prominent improvement. With the increase in Reynolds number, the enhancement in average Nusselt number increases in stationary configurations and decreases in rotating configurations.
HEAT TRANSFER ENGINEERING
(2022)
Article
Nanoscience & Nanotechnology
Mohammadreza Ebrahimnataj Tiji, Waleed Khalid Al-Azzawi, Hayder I. Mohammed, Anmar Dulaimi, Farhan Lafta Rashid, Jasim M. Mahdi, Hasan Sh. Majdi, Pouyan Talebizadehsardari, Hafiz Muhammad Ali
Summary: In this study, the impact of design modifications on the thermofluidic behavior of a phase change material filled in a triplex tube containment geometry was investigated. It was found that adopting frustum tube designs and an appropriate gap width can increase the heat storage rate.
JOURNAL OF NANOMATERIALS
(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
Thermodynamics
Amir Hossein Eisapour, A. H. Shafaghat, Hayder I. Mohammed, Mehdi Eisapour, Pouyan Talebizadehsardari, Arianna Brambilla, Alan S. Fung
Summary: The gap between energy demand and supply worldwide is of great significance, necessitating the development of efficient storage technologies. This study presents an innovative design for Phase Change Material (PCM) thermal energy storage suitable for solar energy applications. The proposed configuration utilizes wavy and twisted tube profiles, along with ascending and descending conical containers, and the addition of nanoparticles to enhance thermal conductivity. The results demonstrate an 83% faster charging time compared to conventional straight tube heat storage units.
APPLIED THERMAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Azher M. Abed, Hayder I. Mohammed, Indrajit Patra, Jasim M. Mahdi, Adeel Arshad, Ramaswamy Sivaraman, Raed Khalid Ibrahem, Fadhil Abbas Al-Qrimli, Sami Dhahbi, Pouyan Talebizadehsardari
Summary: This study evaluates the melting characteristics of a phase change material in a heat storage system with different types of fins. The results show that the system equipped with four hemispherical fins and an additional fin on the bottom wall performs the best, while the staggered arrangement of fins improves heat transfer rate. The downward quarter-spherical fins exhibit the highest performance among all cases studied, with a 78% increase in heat storage rate compared to the case without fins.
FRONTIERS IN CHEMISTRY
(2022)
Article
Energy & Fuels
Abdullah Bahlekeh, Hayder Mohammed, Waleed Khalid Al-Azzawi, Anmar Dulaimi, Hasan Sh Majdi, Pouyan Talebizadehsardari, Jasim M. Mahdi
Summary: By employing annular fins and optimizing their structural parameters, the melting response of a triple-tube latent heat storage system can be improved. Increasing the number of fins enhances heat communication and leads to faster melting and higher heat storage rate. Furthermore, adding an extra fin at the bottom with limited heat diffusion can further improve system performance.
ENERGY SCIENCE & ENGINEERING
(2022)
Article
Computer Science, Interdisciplinary Applications
Nidhal Ben Khedher, Jasim M. Mahdi, Hasan S. Majdi, Koorosh Khosravi, Waleed Khalid Al-Azzawi, Fadhil Abbas Al-Qrimli, Sami Dhahbi, Pouyan Talebizadehsardari
Summary: This research explores the potential of dimple-shaped fins for enhancing PCM thermal response, with results showing that increasing the number of dimple fins can significantly improve heat storage rates. Further enhancements can be achieved by optimizing the position and spacing of fins, as well as utilizing staggered fin distribution.
JOURNAL OF COMPUTATIONAL DESIGN AND ENGINEERING
(2022)
Article
Energy & Fuels
Mohammadreza Ebrahimnataj Tiji, Hayder I. Mohammed, Raed Khalid Ibrahem, Anmar Dulaimi, Jasim M. Mahdi, Hasan Sh. Majdi, Mohammad Mehdi Keshtkar, Pouyan Talebizadehsardari
Summary: This study numerically investigates the effects of T-shaped fins on the melting performance of phase change materials (PCM) in a vertical triple-tube storage containment. The results reveal that the improvement potential of T-shaped fins lies in the fin's body rather than the head. Additionally, adding a flat fin significantly enhances the total heat storage rate and reduces the melting time.
FRONTIERS IN ENERGY RESEARCH
(2022)
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
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)
Article
Construction & Building Technology
Farkad A. A. Lattieff, Mohammed A. A. Atiya, Rudainah Ali Lateef, Anmar Dulaimi, Muhsin J. J. Jweeg, Azher M. M. Abed, Jasim M. M. Mahdi, Pouyan Talebizadehsardari
Summary: This study tested the performance and effectiveness of an EHX design in a sandy soil area in Baghdad, Iraq, and found that it showed good functionality and energy-saving potential, especially in January and June.
FRONTIERS IN BUILT ENVIRONMENT
(2022)
