Article
Energy & Fuels
Cherif Ould-Lahoucine, Hamza Ramdani, Driss Zied
Summary: An energetic and exergetic analysis was conducted on a hybrid photovoltaic-thermal solar collector with a rectangular channel circulating water-TiO2 nanofluid. Simulation results showed no substantial advantage of the water-TiO2 based hybrid collector over the water-based one. Additionally, a novel method for determining the height of the heat exchanger with a rectangular cross-section was proposed, showing a similar result to the one calculated using a different formula.
Article
Construction & Building Technology
Gokhan Yildiz, Ali Etem Gurel, Ilhan Ceylan, Alper Ergun, Mehmet Onur Karaagac, Umit Agbulut
Summary: This study investigates the performance of a Photovoltaic-Thermal module-assisted vapor compression refrigeration system (PV/T-VCRS). Unlike conventional methods, superheating is done with a PV/T module. Energy and exergy analyses reveal that PV/T-VCRS outperforms the conventional system in terms of electrical efficiency, COP, energy, and exergy.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Thermodynamics
Diogo Ortiz Machado, Gustavo Artur Andrade, Julio Elias Normey-Rico, Carlos Bordons
Summary: This study develops an exergy-based hierarchical control for the ACUREX solar collector field. The control can track references, reject disturbances, and optimize production considering operational constraints and intermittent processes. The findings suggest that the proposed exergy-based controller design provides improved thermodynamic performance and is a suitable strategy for the ACUREX solar field.
Article
Multidisciplinary Sciences
Yemeli Wenceslas Kohole, Fodoup Cyrille Vincelas Fohagui, Ghislain Tchuen
Summary: This paper examines the impact of exergy destruction rates of different components of a flat-plate solar collector on its performance, using a theoretical model based on energy and exergy balance. The study investigates the influence of parameters such as solar radiation, mass flow rate, inlet fluid temperature, and insulation thickness on exergy destruction rates and efficiency. The results show that increasing mass flow rate and inlet fluid temperature can improve the collector's exergy efficiency, with the highest exergy destruction rate occurring in the absorber plate.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Renpeng Li, Siyang Zheng, Ruzhu Wang, Zhenyuan Xu
Summary: This paper proposes a hybrid reverse osmosis-thermal distillation system driven by a solar photovoltaic-thermal collector, which achieves better utilization of solar energy and has a higher water productivity, making it an effective choice for boosting the water productivity of solar desalination.
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
Thermodynamics
Tao Hai, Mohammad Zoghi, Hamed Habibi
Summary: This study compares the performances of 12 LiBr-H2O chiller configurations driven by different collector types and determines that ETC-driven ACCH 2 is the best configuration with the lowest unit cost of cooling.
Article
Energy & Fuels
R. M. Mostafizur, M. G. Rasul, M. N. Nabi
Summary: In this study, the energy and exergy efficiencies of a flat plate solar collector using different nanofluids as flowing mediums were analyzed. The results showed that the solar collector operated with CuO/water nanofluid had the highest efficiency, significantly outperforming water as a flowing medium.
Article
Energy & Fuels
Ahssan M. A. Alshibil, Istvan Farkas, Piroska Vig
Summary: This study designed and fabricated a novel configuration of a copper absorber plate connected to a photovoltaic module to reduce overheating. The addition of louver-shaped fins and a serpentine tube created a bi-fluid-based photovoltaic thermal module, increasing heat transfer rate from the PV surface to air and water. Experimental results showed a linear relationship between electrical efficiency and decreased cell temperature, thanks to the fins and tube. Compared to standard and air-cooled units, the bi-fluid module demonstrated lower cell temperature and higher electrical and thermal efficiency values. The use of Louver-shaped fins and tubes allows the fluid in the system to gain the most heat, making it highly efficient at utilizing electricity.
Article
Energy & Fuels
Mohammad Hosseinzadeh, Reza Sadeghirad, Hosein Zamani, Ali Kianifar, Seyyed Mahdi Mirzababaee, Ali Faezian
Summary: This study investigated the effects of different heat transfer fluids on the energy and exergy efficiencies of a new indirect solar cooker, showing that using nanofluids in the system can improve performance, with SiC-oil nanofluid having the most significant impact.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Green & Sustainable Science & Technology
Muhammad Imtiaz Hussain, Gwi Hyun Lee
Summary: This study proposes a multi-conical solar concentrating system for drying agricultural products, which shows significant improvements in thermal performance and drying time reduction. The economic and environmental analyses demonstrate the high efficiency of the nanofluid-powered multi-conical solar drying system.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Green & Sustainable Science & Technology
Ahmed N. Abdalla, Amin Shahsavar
Summary: The usability of water based GO-TiO2-Fe3O4 ternary nanofluid in a photovoltaic/thermal (PV/T) collector was examined in this experimental study from both energy and exergy perspectives. The effects of nanoadditive mixing ratio, nanofluid mass flow rate, and nanoparticle volume concentration on the outcomes were investigated. The results showed that the nanofluid with a mixing ratio of 1:1:1 had the best performance in terms of energy and exergy. Among the cases examined, the highest overall energy and exergy efficiencies were 88.23% and 15.36%, respectively, for the 1:1:1 mixing ratio, 80 kg h-1 mass flow rate, and 1% volume concentration. Finally, it was found that both the mass flow rate and volume concentration had an increasing effect on the overall energy and exergy efficiencies.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Multidisciplinary Sciences
Z. Khalili, M. Sheikholeslami, Ladan Momayez
Summary: In this study, a combination of thermoelectric generator (TEG) layer with conventional layers of photovoltaic-thermal (PVT) modules is used to utilize waste heat and improve efficiency. A cooling duct is installed at the bottom of the PVT-TEG unit to reduce the cell temperature. The type of fluid and structure of the duct affect the system performance. Hybrid nanofluid and three different duct configurations are implemented, and simulations show that the elliptic structure performs the best with a 6.29% enhancement in overall performance.
SCIENTIFIC REPORTS
(2023)
Article
Construction & Building Technology
Jagannath Reddy, Biplab Das, Jagadish, Sushant Negi
Summary: Experimental investigation on two solar air collectors (SACs) with modified absorber plates shows that the cross-corrugated trapezoidal SAC produces up to 7.72% more energy than the reverse trapezoidal SAC. Energy efficiency increases with tilt angle and a threefold increase in air mass flow rate leads to 100-105% increase in energy and exergy efficiencies. Overall, the environmental impact factor of the type-II SAC is significantly lower than that of the type-I SAC.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Saeid Mirzaei, Mehran Ameri, Amin Ziaforoughi
Summary: This study investigated the manufacturing and testing of an infrared dryer equipped with a PV/T solar collector, aiming to compare the energy and exergy efficiency of the dryer in glazed and unglazed modes, as well as analyze the drying kinetic of potato slices. The experiments showed that glazed mode prolonged drying time by 12-25% for 3 mm thicknesses and 5-25% for 7 mm thicknesses compared to unglazed mode, despite the system's low energy consumption.
Article
Energy & Fuels
Cherif Ould-Lahoucine, Hamza Ramdani, Driss Zied
Summary: An energetic and exergetic analysis was conducted on a hybrid photovoltaic-thermal solar collector with a rectangular channel circulating water-TiO2 nanofluid. Simulation results showed no substantial advantage of the water-TiO2 based hybrid collector over the water-based one. Additionally, a novel method for determining the height of the heat exchanger with a rectangular cross-section was proposed, showing a similar result to the one calculated using a different formula.
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)