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)
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
Energy & Fuels
Monica Chinchilla, David Santos-Martin, Miguel Carpintero-Renteria, Scott Lemon
Summary: This study proposes models for accurately calculating the optimal tilt angle for solar photovoltaic arrays or solar collectors worldwide, using global horizontal radiation data. A mathematical model based on latitude has been developed. The results demonstrate the good performance of the proposed models.
Article
Energy & Fuels
Raghed Melhem, Yomna Shaker
Summary: This article focuses on optimizing the tilt angle of solar panels in the GCC countries. By using a mathematical model and comparing it with the PVWatts calculator, the study calculates the optimal tilt angle based on latitude and longitude. The importance of choosing the right tilt angle for maximizing solar energy production is emphasized. The results show that changing the tilt angle 12 times a year can increase power output by 10.9%. The study highlights the importance of selecting the optimal tilt angle and provides valuable data for the GCC countries.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Energy & Fuels
Tong Liu, Li Liu, Yufang He, Mengfei Sun, Jian Liu, Guochang Xu
Summary: This study proposes a universal mathematical model for calculating the optimal tilt angle of solar collectors based on the true orbit of the Sun, demonstrating variations in the optimal solar angle with month and latitude through several examples.
Article
Thermodynamics
Luting Xu, Enshen Long, Jincheng Wei, Zhu Cheng, Hanjie Zheng
Summary: The study introduces the concept of viewshed to analyze terrain shading effects for calculating the optimal angles of solar collectors in mountainous areas; By predicting potential solar irradiation under terrain shading, the optimal tilt angle and orientation of solar collectors can be detected; Considering the terrain shading effect can significantly increase solar energy collection compared to current standard recommendations.
Article
Energy & Fuels
J. M. Rodriguez-Munoz, I Bove, R. Alonso-Suarez
Summary: This article presents a new model for the Incident Angle Modifier (IAM) for Flat Plate Collectors (FPC), which outperforms existing models in terms of accuracy and reliability, representing IAM variability for all incident angles.
Article
Green & Sustainable Science & Technology
Majid Ahmadlouydarab, Tahereh Dana Anari, Alireza Akbarzadeh
Summary: This research investigates the efficiency of energy absorption in a cylindrical solar collector and two flat plate solar collectors. The results show that increasing the concentration of nanofluid enhances the heat absorption efficiency of the collectors, and the flat plate solar collector with a smaller exposed surface area has the highest absorption efficiency. Additionally, experiments with shorter heat absorption time yield higher energy absorption efficiency.
Article
Thermodynamics
Jiaxuan Jing, Yong Zhou, Lingyu Wang, Yanfeng Liu, Dengjia Wang
Summary: This study aims to fill the gaps in global solar radiation data by using limited data from 85 meteorological observation stations and routine meteorological data from 2001 stations. The spatial distribution of global solar radiation and diffuse solar radiation is obtained using the Inverse Distance Weighing model. The optimum tilt angle of photovoltaic systems is calculated using the Collares-Pereira and Rabl hourly solar radiation model and the solar radiation on sloped surfaces model. The results show the range of annual global solar radiation and diffuse solar radiation in China, as well as the optimal tilt angle and photovoltaic power generation potential.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Environmental Sciences
Imran Nazir Unar, Ghulamullah Maitlo, Sikandar Ali Abbasi, Masroor Abro, Raja Fahad Qureshi, Sheeraz Ahmed Memon, Tanveer Hussain, Kashif Hussain Mangi
Summary: Pakistan suffers from energy deficiency, despite having abundant sunlight resources. The research measures the performance of solar flat plate collectors at different tilt angles and geographical coordinates through numerical simulations.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Energy & Fuels
Lan Xu, Aboozar Khalifeh, Amith Khandakar, Behzad Vaferi
Summary: Nanofluids have been used in experimental studies to improve the performance of flat plate solar collectors (FPSC). However, the results regarding the effect of nanofluids on FPSC are often ambiguous and contradictory. This research develops a straightforward approach to predict the thermal efficiency of nanofluid-based FPSC and compares different machine learning models to determine the most accurate tool for this task, finding that LS-SVR performs the best.
Article
Thermodynamics
Hassan Hajabdollahi, Mohammadreza Khosravian, Mohammad Shafiey Dehaj
Summary: This study models and optimizes a solar network heater using flat plate collectors, considering both cost ratio and exergy efficiency as objective functions. The results show that the device is not cost-effective in the case of high collector efficiency.
Article
Green & Sustainable Science & Technology
Arian Bahrami, Chiemeka Onyeka Okoye, Hamed H. Pourasl, Vahid M. Khojastehnezhad
Summary: This study focuses on improving the performance of flat plate solar collectors (FPSC) by utilizing solar trackers. Different tracking orientations and locations are considered, and a more accurate model and data are used for assessment and ranking. The study aims to provide comprehensive information for engineers, designers, installers, and policymakers in the adoption of FPSC and solar trackers in the northern hemisphere.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Thermodynamics
Leonardo Geovo, Guilherme Dal Ri, Rahul Kumar, Sujit Kumar Verma, Justo J. Roberts, Andres Z. Mendiburu
Summary: The present work investigates the theoretical model of a flat-plate solar collector using nanofluids as heat transport medium. The model is validated by comparing it with experimental data and is shown to have a maximum relative error of 5.36%. Parametric and case studies demonstrate that using nanofluids can significantly increase the thermal efficiency of solar collectors and have great potential for application.
Article
Thermodynamics
Dengjia Wang, Zhelong Mo, Yanfeng Liu, Yuchao Ren, Jianhua Fan
Summary: Increasing the collector dimensions effectively improves the thermal performance of FPSCs, with LSFPSCs outperforming conventional FPSCs in parallel. The collector efficiency of LSFPSCs is higher than that of conventional FPSCs, especially under low solar irradiance, low ambient temperatures, and high mass flow rates. Additionally, LSFPSCs excel in solar-energy rich areas, with Lhasa having the longest daily operating time among the studied cities and a useful energy proportion of about 55%.
Article
Physics, Multidisciplinary
Michel Feidt, Monica Costea, Stoian Petrescu, Camelia Stanciu
Article
Geochemistry & Geophysics
Dorin Stanciu, Camelia Stanciu, Ioana Paraschiv
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS
(2016)
Review
Thermodynamics
Soteris A. Kalogirou, Sotirios Karellas, Konstantinos Braimakis, Camelia Stanciu, Viorel Badescu
PROGRESS IN ENERGY AND COMBUSTION SCIENCE
(2016)
Article
Energy & Fuels
Camelia Stanciu, Dorin Stanciu, Adina-Teodora Gheorghian
Article
Thermodynamics
Dorin Stanciu, Viorel Badescu
ENERGY CONVERSION AND MANAGEMENT
(2017)
Article
Physics, Multidisciplinary
Camelia Stanciu, Dorin Stanciu, Adina-Teodora Gheorghian, Elena-Beatrice Tanase, Catalina Dobre, Marius Spiroiu
Article
Engineering, Chemical
A. A. Alfaryjat, A. Dobrovicescu, D. Stanciu
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2019)
Article
Physics, Multidisciplinary
Camelia Stanciu, Michel Feidt, Monica Costea, Dorin Stanciu
Article
Thermodynamics
A. A. Alfaryjat, H. A. Mohammed, Nor Mariah Adam, D. Stanciu, A. Dobrovicescu
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2018)
Proceedings Paper
Energy & Fuels
Camelia Stanciu, Dorin Stanciu, Beatrice Tanase, Adina Gheorghian, Catalina Dobre
2017 8TH INTERNATIONAL CONFERENCE ON ENERGY AND ENVIRONMENT (CIEM)
(2017)
Proceedings Paper
Engineering, Mechanical
C. Stanciu, I. Soriga, A. T. Gheorghian, D. Stanciu
7TH INTERNATIONAL CONFERENCE ON ADVANCED CONCEPTS IN MECHANICAL ENGINEERING
(2016)
Article
Thermodynamics
Pengcheng Zhao, Jingang Wang, Liming Sun, Yun Li, Haiting Xia, Wei He
Summary: The production of green hydrogen through water electrolysis is crucial for renewable energy utilization and decarbonization. This research explores the optimal electrode configuration and system design of compactly-assembled industrial electrolyzer. The findings provide valuable insights for industrial application of water electrolysis equipment.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
V. Baiju, P. Abhishek, S. Harikrishnan
Summary: Thermally driven adsorption desalination systems (ADS) have gained attention as an eco-friendly solution for water scarcity. However, they face challenges related to low water productivity and scalability. To overcome these challenges, integrating ADS with other desalination technologies can create a small-scale hybrid system. This study proposes integrating ADS with a Thermo Electric Dehumidification (TED) unit to enhance its performance.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
C. X. He, Y. H. Liu, X. Y. Huang, S. B. Wan, Q. Chen, J. Sun, T. S. Zhao
Summary: A decentralized centroid multi-path RC network model is constructed to improve the temperature prediction accuracy compared to traditional RC models. By incorporating multiple heat flow paths and decentralizing thermal capacity, a more accurate prediction is achieved.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Chaoying Li, Meng Wang, Nana Li, Di Gu, Chao Yan, Dandan Yuan, Hong Jiang, Baohui Wang, Xirui Wang
Summary: There is an urgent need to shift away from heavy dependence on fossil fuels and embrace renewable energy sources, particularly in the energy-intensive oil refining process. This study presents an innovative concept called the Solar Oil Refinery, which applies solar energy in oil refining. A solar multi-energies-driven hybrid chemical oil refining system that utilizes solar pyrolysis and electrolysis has been developed, significantly improving solar utilization efficiency, cracking rate, and hydrogen yield.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Chao Ma, Guanghui Wang, Dingbiao Wang, Xu Peng, Yushen Yang, Xinxin Liu, Chongrui Yang, Jiaheng Chen
Summary: This study proposes a bio-inspired fish-tail wind rotor to improve the wind power efficiency of the traditional Savonius rotor. Through transient simulations and orthogonal experiments, the key factors affecting the performance are identified. A response surface model is constructed to optimize the power coefficient, resulting in an improvement of 9.4% and 6.6% compared to the Savonius rotor.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Sina Bahmanziari, Abbas-Ali Zamani
Summary: This paper proposes a new framework for improving electrical energy harvesting from piezoelectric smart tiles through a combination of magnetic plucking, mechanical impact, and mechanical vibration force mechanisms. Experimental results demonstrate a significant increase in energy yield and average energy harvesting time compared to other mechanisms.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Nanjiang Dong, Tao Zhang, Rui Wang
Summary: This study establishes a multiobjective mixed-variable configuration optimization model for a comprehensive combined cooling, heating, and power energy system, and proposes an efficient generating operator to optimize this model. The experimental results show that the proposed algorithm performs better than other state-of-the-art algorithms.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Ahmed E. Mansy, Eman A. El Desouky, Tarek H. Taha, M. A. Abu-Saied, Hamada El-Gendi, Ranya A. Amer, Zhen-Yu Tian
Summary: This study aims to convert office paper waste into bioethanol through a sustainable pathway. The results show that physiochemical and enzymatic hydrolysis of the waste can yield a high glucose concentration. The optimal conditions were determined using the Box-Behnken design, and a blended membrane was used for ethanol purification.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Sven Klute, Marcus Budt, Mathias van Beek, Christian Doetsch
Summary: Heat pumps are crucial for decarbonizing heat supply, and steam generating heat pumps have the potential to decarbonize the industrial sector. This paper presents the current state, technical and economic data, and modeling principles of steam generating heat pumps.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Le Zhang, To-Hung Tsui, Yen Wah Tong, Pruk Aggarangsi, Ronghou Liu
Summary: This study investigates the effectiveness of a current-carrying-coil-based magnetic field in promoting anaerobic digestion of chicken manure. The results show that the applied magnetic field increases methane yield, decreases carbon dioxide production, and reduces the concentration of ammonia nitrogen. Microbial community analysis reveals the enrichment of certain methanogenic genera and enhanced metabolic pathways. Pilot-scale experiments confirm the technical effectiveness of the magnetic field assistance in enhancing anaerobic digestion of chicken manure.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Bo Chen, Ruiqing Ma, Yang Zhou, Rui Ma, Wentao Jiang, Fan Yang
Summary: This paper presents an advanced energy management strategy for fuel cell hybrid electric heavy-duty vehicles, focusing on speed planning and energy allocation. By utilizing predictive co-optimization control, this strategy ensures safe inter-vehicle distance and minimizes energy demand. Simulation results demonstrate the effectiveness of the proposed method in reducing fuel cell degradation cost and overall operation cost.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Fabio Fatigati, Roberto Cipollone
Summary: Organic Rankine Cycle-based microcogeneration systems that use solar sources to generate electricity and hot water can help reduce CO2 emissions in residential energy-intensive sectors. The adoption of a recuperative heat exchanger in these systems improves efficiency, reduces thermal power requirements, and saves on electricity costs.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Lipeng He, Renwen Liu, Xuejin Liu, Xiaotian Zheng, Limin Zhang, Jieqiong Lin
Summary: This research proposes a piezoelectric-electromagnetic hybrid energy harvester (PEHEH) for low-frequency wave motion and self-sensing wave environment monitoring. The PEHEH shows promising power output and the ability to self-power and self-sense the wave environment.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Shangling Chu, Yang Liu, Zipeng Xu, Heng Zhang, Haiping Chen, Dan Gao
Summary: This paper studies a distributed energy system integrated with solar and natural gas, analyzes the impact of different parameters on its energy utilization and emissions reduction, and obtains the optimal solution through an optimization algorithm. The results show that compared to traditional separation production systems, this integrated system achieves higher energy utilization and greater reduction in carbon emissions.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Qingpu Li, Yaqi Ding, Guangming Chen, Yongmei Xuan, Neng Gao, Nian Li, Xinyue Hao
Summary: This paper proposes and studies a piston-type thermally-driven pump with a structure similar to a linear compressor, aiming to eliminate the high-quality energy consumption of existing pumps and replace mechanical pumps. The coupling mechanism of working fluid flow and element dimension is analyzed based on force analysis, and experimental data analysis is used to determine the pump operation stroke. Theoretical simulation is conducted to analyze the correlation mechanism of the piston assembly. The research shows that the thermally-driven pump can greatly reduce power consumption and has potential for industrial applications.
ENERGY CONVERSION AND MANAGEMENT
(2024)