Article
Thermodynamics
Mustapha Dida, Slimane Boughali, Djamel Bechki, Hamza Bouguettaia
Summary: The research paper introduces a passive cooling system that effectively reduces the temperature of PV modules, resulting in a significant increase in electrical efficiency. The system, based on water evaporation and capillary action, demonstrates high effectiveness in maintaining uniform temperature distribution and has the advantages of being environmentally friendly, low-cost, and low water consumption.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Thermodynamics
Yunis Khan, Roshan Raman, Mohammad Mehdi Rashidi, Hakan Caliskan, Manish Kumar Chauhan, Akhilesh Kumar Chauhan
Summary: This paper explores the use of water spray as an alternative cooling method for PV solar panels. The experimental setup for water spray cooling was established in Sultanpur, India, and tested under different climate conditions. The results showed that water spray cooling reduced the panel temperature from 53 to 23 degrees C and increased the total power output by 15.3%. The system's effectiveness was also enhanced by its cleaning effects. Additionally, the experiments demonstrated that an increase of 1 degree C in panel temperature resulted in a 0.5% drop in PV cell efficiency, while a 0.2 degree C temperature drop through single nozzle spray cooling led to a 0.28% increase in the panel's electrical efficiency.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Thermodynamics
Cheng Yang, Jie Lin, Frantisek Miksik, Takahiko Miyazaki, Kyaw Thu
Summary: This research proposes a novel cooling method for solar photovoltaic (PV) panels, which improves energy efficiency by enhancing the cooling technology in hot environments.
APPLIED THERMAL ENGINEERING
(2024)
Article
Green & Sustainable Science & Technology
Amirhosein Hadipour, Mehran Rajabi Zargarabadi, Saman Rashidi
Summary: Cooling of photovoltaic panels is crucial for enhancing electrical efficiency and extending lifespan. The use of a pulsed-spray water cooling system can improve efficiency and reduce water consumption. From an economic perspective, pulsed-spray water cooling is an efficient new cooling method.
Article
Energy & Fuels
Someshwar S. Bhakre, Pravin D. Sawarkar, Vilas R. Kalamkar
Summary: Solar photovoltaic (PV) technology is facing the challenge of decreased electrical efficiency due to the rise in panel temperature. To overcome this issue, an evaporative cooling method using jute cloth and water flowing under gravity was investigated. The study revealed that this simple and cost-effective cooling system can reduce the average panel temperature by 18℃ and increase the electrical efficiency by 10.31%.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2023)
Article
Green & Sustainable Science & Technology
Shuai Li, Zhihua Zhou, Junwei Liu, Ji Zhang, Huajie Tang, Zhuofen Zhang, Yanling Na, Chongxu Jiang
Summary: Radiative cooling (RC) is a passive cooling technology that can efficiently cool photovoltaic (PV) panels without consuming energy or producing pollution. This paper proposes an indirect cooling system for PV panels based on RC, which utilizes a cold storage module and water system to reduce the temperature and increase the power conversion efficiency (PCE) of the PV panels. Experimental results demonstrate that the system effectively decreases the average temperature of the PV panels and improves the PCE, and the inclusion of a cover shield and large water tank capacity further enhances the system efficiency.
Article
Thermodynamics
Mehmet Ali Yildirim, Artur Cebula, Maciej Sulowicz
Summary: This paper proposes an innovative thermal collector that couples the thermal behavior of photovoltaic modules and a designed cooling system to enhance the thermal and electrical conversion efficiencies of water-based photovoltaic-thermal systems. The results show that the designed cooling system achieves better performance and significantly improves the thermal and electrical conversion efficiency compared to existing solutions in the literature.
Article
Green & Sustainable Science & Technology
D. Altegoer, J. Hussong, R. Lindken
Summary: This study presents a cooling method for reducing cell temperature of a solar cell by evaporation of water droplets in a chimney-like channel attached to the back side of a photovoltaic module, effectively increasing the efficiency of the solar cell. The use of two pin-jet nozzles in the cooling approach has shown the best performance in terms of water usage per efficiency increase. Additionally, the cooling system using the chimney-like channel can prevent deposits on the front side of the photovoltaic module and avoid stress cracks in the glass surface.
Article
Green & Sustainable Science & Technology
V. S. Poddar, V. A. Ranawade, N. B. Dhokey
Summary: This study investigates the use of dissipated heat for improving the efficiency of photovoltaic systems. Through mathematical modeling and experimentation, it was found that utilizing a combination of photovoltaic, thermoelectric, and direct evaporative cooling systems can significantly increase efficiency under certain conditions.
Article
Construction & Building Technology
Ali Hammoodi Mahdi, Issam M. Ali Aljubury
Summary: Evaporative cooling systems are crucial in the hot and dry climates of the Middle East, with the use of underground water and PV panels improving system efficiency and reducing temperature differences. The proposed IDEC system can provide thermal comfort in hot and arid regions while saving energy.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Thermodynamics
Khuram Pervez Amber, Waseem Akram, Muhammad Anser Bashir, Muhammad Sajid Khan, Anila Kousar
Summary: This study experimentally evaluated the performance of a locally developed passive cooling technique on photovoltaic modules, finding that modules with rectangular fins dissipated more heat, generated more power, and had a higher efficiency compared to modules with circular fins, which had a weaker cooling effect.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Yanfeng Liu, Yingya Chen, Dengjia Wang, Jingrui Liu, Xi Luo, Yingying Wang, Huaican Liu, Jiaping Liu
Summary: The study investigates the structural layout and parameter optimization of a PV cooling system which effectively reduces the surface temperature, increases power generation efficiency, and achieves maximum conversion and exergy efficiencies through exponential relationships with mass flow rate. Economic calculations show that the PV cooling system can increase power generation by 7%-15% in typical cities in China.
Article
Engineering, Multidisciplinary
Ana M. Blanco-Marigorta, Ana Tejero-Gonzalez, Javier M. Rey-Hernandez, Eloy Velasco Gomez, Richard Gaggioli
Summary: This paper presents the exergy analysis of two experimental prototypes of indirect evaporative cooling systems with different constructive characteristics. The results indicate that the primary air inlet temperature and the secondary air inlet wet bulb temperature play crucial roles in determining exergy destruction and efficiency.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Sakhr M. Sultan, C. P. Tso, E. M. N. Ervina, M. Z. Abdullah
Summary: This paper proposes new methods for assessing the performance of a photovoltaic cooler, which can significantly reduce the assessment cost and are time-efficient.
Article
Construction & Building Technology
Hongkuan Zhang, Hongting Ma, Shuo Ma, Mingchang Yang
Summary: This study presented a novel heat and mass exchanger integrating indirect evaporative cooling and liquid dehumidification techniques, which can improve energy efficiency through optimized design and is suitable for air conditioning systems in hot and humid areas.
ENERGY AND BUILDINGS
(2021)
Article
Energy & Fuels
Zeyad A. Haidar, Jamel Orfi, Zakariya Kaneesamkandi
Summary: The study introduces a new evaporative cooling design to effectively lower the temperature of PV panels and improve their performance. Additionally, evaporative cooling helps stabilize the temperature fluctuations of the panels, enhancing the regulation of electrical power output and reducing the uncertainty associated with solar PV systems.
Article
Environmental Sciences
A. Najib, J. Orfi, H. Alansary, E. Ali
Summary: A comprehensive study was conducted to explore the impact of operating conditions on the performance of a multi-effect vacuum membrane distillation pilot plant. Theoretical assessment of energy and exergy efficiency was achieved using a mathematical model calibrated with experimental data. Specific thermal energy consumption (STEC) and specific electrical energy consumption (SEEC) were evaluated and found to reach 166 kWh/m(3) and 4.5 kWh/m(3) respectively. Increasing feed flow rate had a positive impact on process performance, especially at feed temperatures above 65 degrees C. Ideal operational conditions led to an exergetic efficiency of 21.1%, with the condenser compartment exhibiting the highest exergy destruction. fluctuations in inlet temperatures had varying impacts on the V-MEMD unit performance.
Article
Materials Science, Multidisciplinary
Md Irfanul Haque Siddiqui, Hassan Alshehri, Jamel Orfi, Masood Ashraf Ali, Dan Dobrota
Summary: The motion behavior of non-metallic inclusion particles in a solidifying weld pool is influenced by various factors such as upsetting rate and interfacial tension. The upsetting setting parameters have a substantial effect on the overall non-metallic inclusion motion, impacting the distribution and movement of inclusions in joint areas. Additionally, the interfacial tension between the inclusions and the molten steel plays a significant role in controlling the pushing and engulfment of inclusions at the solid-liquid interface.
Article
Thermodynamics
A. Najib, J. Orfi, H. Alansary, E. Ali
Summary: This study aims to develop a dimensionless model for the vacuum multi-effect membrane distillation system, which can predict the critical performance indicators. The model reduces design parameters and improves efficiency and practicality. The compatibility of the model is validated and it can accurately predict the specific thermal energy consumption.
JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS
(2022)
Article
Engineering, Chemical
Emad Ali, Jamel Orfi, Hany AlAnsary, Sofiane Soukane, Harun Elcik, Alla Alpatova, Noreddine Ghaffour
Summary: The study found that the water cost of the hybrid desalination system is lower than that of a standalone MEE system, with the sensitivity of water production cost to MD feed flow rate and unit cost being significant. A modified structure of the hybrid system can greatly increase water recovery ratio and reduce water cost.
Article
Energy & Fuels
Mahmoud Badawy Elsheniti, Mohamed Shaaban Eissa, Hany Al-Ansary, Jamel Orfi, Osama Elsamni, Abdelrahman El-Leathy
Summary: This study numerically investigates the use of an emerging aluminum foamed bed packed with advanced Maxsorb adsorbent in a two-bed adsorption system and compares its performance to a traditional finned-tube based system. The results show that the aluminum foam based system outperforms the finned-tube based system within a certain range of parameters.
Article
Chemistry, Physical
Karmveer, Naveen Kumar Gupta, Md Irfanul Haque Siddiqui, Dan Dobrota, Tabish Alam, Masood Ashraf Ali, Jamel Orfi
Summary: Artificial roughness on the absorber of the solar air heater improves performance but requires higher pumping power. Thermo-hydraulic performance considers both pumping power and heat gain. The shape, size, and arrangement of artificial roughness are crucial for performance optimization.
Article
Biochemistry & Molecular Biology
Abdullah Najib, Hany Al-Ansary, Jamel Orfi, Emad Ali, Fahad Awjah Almehmadi
Summary: This research addresses the retrofitting of multiple-effect vacuum membrane distillation units by using cross-flow configuration. The study finds that this configuration improves both internal and global performance indicators of the unit, leading to increased productivity, energy efficiency, and exergy. It also compares the performance of cross-flow configuration with forward-flow configuration and identifies the areas of improvement.
Article
Thermodynamics
Syed Noman Danish, Hany Al-Ansary, Abdelrahman El-Leathy, Mazen Ba-Abbad, Salah Ud-Din Khan, Arslan Rizvi, Jamel Orfi, Ahmed Al-Nakhli
Summary: This paper presents a new solar concentrating system with two novel receivers tested on a novel collector technology. The results show that the system provides higher thermal efficiency and manufacturing ease compared to conventional systems. The economic analysis reveals significant cost savings and a short payback time for the system.
Article
Chemistry, Multidisciplinary
Mahmoud Badawy Elsheniti, Mohamed Shaaban Eissa, Hany Al-Ansary, Jamel Orfi, Abdelrahman El-Leathy, Osama Elsamni
Summary: This study investigates the use of graphene nanoplatelets to improve the performance of adsorption refrigeration systems. It is found that a composite adsorbent with specific layer thicknesses and cycle times can enhance the system performance, but an excessively large layer thickness reduces the performance.
APPLIED SCIENCES-BASEL
(2022)
Article
Thermodynamics
Emad Ali, Jamel Orfi, Hany AlAnsary, Ahmad S. Alsaadi, Noreddine Ghaffour
Summary: In this study, a novel multi-stage flash (MSF) configuration with reversing the brine circulation is developed. The performance of this configuration, named MSF reversal (MSF-RV), is investigated and compared with conventional MSF Once Through (MSF-OT). The results show that MSF-RV has superior output ratio and lower energy consumption compared to MSF-OT. Recycling the rejected brine to mix with seawater enhances the performance of both configurations.
APPLIED THERMAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Fahad Awjah Almehmadi, Abdullah Najib, Emad Ali, Hany Al-Ansary, Jamel Orfi
Summary: This study proposes the integration of PVT and DCMD systems into a residential building and conducts a performance study in Riyadh, Saudi Arabia. The results show that the system achieved a specific cost of water of 23.6 $/m(3) with a renewable energy penetration of 25%, meeting 25% of the building's electricity demand and reducing greenhouse gas emissions by 4300 kg annually.
APPLIED SCIENCES-BASEL
(2022)
Article
Energy & Fuels
Obida Zeitoun, Jamel Orfi, Salah Ud-Din Khan, Hany Al-Ansary
Summary: This study presents a detailed analysis of unit water costs from dual-purpose cogeneration plants. The power levelized cost for different power plants was calculated, and the cost of desalination systems connected to these plants was evaluated using two different approaches. Numerical models based on heat and mass balances were developed and validated, and comprehensive data from Desaldata libraries were used to estimate capital, labor, and maintenance costs. The levelized water cost produced by different desalination systems connected to power plants was estimated, and the impact of various controlling parameters was investigated. The results showed that using the heat-allocated method resulted in lower water costs compared to the power-allocated method, and reverse osmosis remained the most cost-effective desalination technology.
Article
Green & Sustainable Science & Technology
Mahmoud Badawy Elsheniti, Abdulrahman AlRabiah, Hany Al-Ansary, Zeyad Almutairi, Jamel Orfi, Abdelrahman El-Leathy
Summary: Numerical dynamic simulation models were developed for a hybrid solar concentration photovoltaic/thermal (CPV/T) system and an adsorption refrigeration system (ARS). The proposed solar hybrid system can produce 494.4 kg of ice per day with a higher coefficient of performance (COP) and share 84.5% of the vapor compression refrigeration system (VCS).
Article
Engineering, Chemical
Emad Ali, Jamel Orfi, Abdullah Najib
Summary: The study investigates the impact of input dynamics on membrane distillation performance using an experimentally validated model. The results show that altering the proportion of cold stream flow rate to hot stream flow rate has a significant effect on process dynamics, hydrodynamics, and heat-transfer mechanism. Moreover, forcing both flow rates as opposite rectangular waves can enhance the accumulated gain output ratio (GOR) and the recovery ratio (RR). Additionally, decreasing the cycling frequencies of both flow rates further improves the performance.
DESALINATION AND WATER TREATMENT
(2022)
Article
Materials Science, Multidisciplinary
Zhiqiang Li, Xiaoxiao Hu, Zhao-Yun Zeng, Yajiang Chen, Ai-Xi Chen, Xiaobing Luo
Summary: This work demonstrates how the current phase transition of atomic Bose-Einstein condensates in a trap can be controlled by applying an oscillatory driving field. The self-trapping effect in momentum space allows for a suppression of oscillations and a nearly constant directed current. Mean-field chaos serves as an indicator of the quantum phase transition. These findings are supported by an effective three-mode model.
RESULTS IN PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Jinqin Ye, Yi Li, Jun Ding, Heng Yu, Xianqi Dai
Summary: Constructing van der Waals heterostructures is an efficient approach to enhance the properties and broaden the applications of two-dimensional materials. This study explores the structure, stability, electronic, and optical properties of BlueP/MoSSe heterostructures using density functional theory calculations. It is found that the bandgap and band edge of these heterostructures can be effectively modulated by strain and electric field.
RESULTS IN PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Simone Anzellini, Silvia Boccato, Samuel R. Baty, Leonid Burakovsky, Daniele Antonangeli, Daniel Errandonea, Raffaella Torchio
Summary: The melting line of cobalt was investigated through experimental and theoretical methods, revealing a phase transition from hexagonal close-packed structure to face-centered cubic structure at high temperatures. The melting temperatures obtained from both methods showed good agreement and can be described by a Simon-Glatzel equation. Additionally, a thermal equation of state for the face-centered cubic phase of cobalt was determined.
RESULTS IN PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Jiajuan Qing, Shisheng Zhou, Jimei Wu, Mingyue Shao
Summary: This paper investigates the nonlinear chaotic vibrations of fractional viscoelastic PET membranes subjected to combined harmonic and variable axial loads. The viscoelasticity of PET membrane is characterized by the fractional Kelvin-Voigt model. The reliability of the numerical strategy is proved by comparing the results with available fractional systems and examples. The influence of system parameters on chaotic behaviors is described using bifurcation diagrams and detailed responses. This research provides a fundamental framework for controlling viscoelastic substrates in flexible manufacturing.
RESULTS IN PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Aly R. Seadawy, Syed T. R. Rizvi, Bazgha Mustafa, Kashif Ali
Summary: In this research, the complete discriminant system of polynomial method is used to analyze the dynamic characteristics of the cubic-quintic nonlinear Schrodinger equation with an additional anti-cubic nonlinear term, with a focus on the introduction of various optical solitons and wave structures. The analysis illustrates the importance of the polynomial method and provides dynamic results for the solutions.
RESULTS IN PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Ruihang Huang
Summary: This study utilized bibliometric analysis to examine the development of multi-scale calculation of carbon nanotubes. Using CiteSpace III software, 1253 relevant articles from the SCI Expanded database were analyzed to identify research trends in this field. The findings revealed significant progress in the research of multi-scale calculation of carbon nanotubes from 1999 to 2023. The analysis of keywords, literature co-citation network, and keyword cluster network provided valuable insights into the knowledge base, important research results, and research hotspots in this field. Additionally, the study predicted future hot research directions using keyword breakout analysis. The research provides profound insights and important guidance for researchers and policymakers in the field of multi-scale calculation of carbon nanotubes to promote further innovation and development.
RESULTS IN PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Xiaohua Zhou, Erhu Zhang, Shumin Zhao, Lei Zhang
Summary: A theoretic model is proposed to study the adhesion behavior of a vesicle adhering inside another vesicle in 2-D case. The model investigates the equilibrium shape equations and boundary conditions, and reveals the phase diagram and critical adhesion condition in different situations.
RESULTS IN PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Xin Yi, Jia-Cheng Huo, Yong-Pan Gao, Ling Fan, Ru Zhang, Cong Cao
Summary: The paper introduces an iterative quantum algorithm based on quantum gradient descent to solve combinatorial optimization problems, verifying the effectiveness and robustness of the algorithm through numerical simulations and comparison with other algorithms. Experimental results on a real quantum computer also demonstrate the feasibility and performance of the algorithm.
RESULTS IN PHYSICS
(2024)
