Article
Thermodynamics
O. Siddiqui, I Dincer
Summary: A new solar energy-based rice husk gasification system is introduced, which produces renewable hydrogen, cooling, freshwater, and electricity. The hydrogen production rate under design operating conditions is 0.0603 kg/s, with a peak rate of 0.3 kg/s. Comprehensive thermodynamic analyses show that the overall design efficiency is 46.8%, with a net energy production rate of 12.9 MW.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Thermodynamics
Mehmet Gursoy, Ibrahim Dincer
Summary: A unique integrated energy system driven by solar power is proposed in this study, which can provide power, hot water, cooling, and heating for residential buildings and greenhouses. The system's performance is evaluated using energy and exergy analysis, and the effects of changing various operating parameters are examined through parametric studies.
Article
Thermodynamics
Mohamed Lebbi, Khaled Touafek, Ahmed Benchatti, Lyes Boutina, Abdelkrim Khelifa, Mohamed Taher Baissi, Samir Hassani
Summary: The study aimed to address the issues of temperature rise and dust accumulation on solar panels in desert areas, by utilizing a new hybrid system PV/T Bi-fluid to achieve both cooling and self-cleaning simultaneously. Experimental results demonstrated the effectiveness of this system in improving electrical performance.
APPLIED THERMAL ENGINEERING
(2021)
Article
Chemistry, Physical
Merve Ozturk, Ibrahim Dincer
Summary: This study presents an analysis and assessment study of an integrated system for producing ammonia, consisting of a cryogenic air separation unit, polymer electrolyte membrane electrolyzer, and reactor. The system's efficiency is impacted by solar radiation intensity and inlet air conditions, with an increase in solar influx leading to decreased efficiencies. Additionally, the mass flow rate of inlet air significantly affects ammonia production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(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
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
Samareh Ahmadi, Ayat Gharehghani, Mohammad Mohsen Soltani, Amir Hossein Fakhari
Summary: A new combination of a multi-generation system based on solar energy was presented and studied in this study. The system achieved improved energy and exergy efficiencies through better utilization of dissipated heat and the inclusion of geothermal energy. The system is capable of providing reliable energy supply and cooling load in different operating modes, while also generating fresh water and hydrogen.
Article
Chemistry, Physical
H. Ishaq, I Dincer
Summary: A new configuration of solar energy-driven integrated system for ammonia synthesis and power generation is proposed in this study. The system is analyzed dynamically to explore its performance under different radiation intensities, with focus on parameters such as power production and efficiency. The findings highlight the system's capability in hydrogen and ammonia production, as well as power generation efficiency.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Thermodynamics
Mohamed M. Ismail, Ibrahim Dincer
Summary: A multigenerational waste to energy system has been developed to generate hydrogen, electricity, heating, domestic hot water, and fresh water. The system utilizes plastic waste gasification to produce syngas, which is then processed through multiple sub-systems. Energy and exergy analyses were conducted to evaluate the overall system and determine its energy and exergy efficiencies. The system also incorporates geothermal energy to generate steam for plastic waste gasification. The current system has a power capacity of 73,550 kW and produces hydrogen at a rate of 1.05 kg/s, while a reverse osmosis water desalination sub-system produces fresh water at a rate of 12 kg/s. The achieved energy efficiency and exergy efficiency for the reference case are 66.24% and 48.10%, respectively.
Article
Chemistry, Physical
Merve Ozturk, Ibrahim Dincer
Summary: This paper conducts a comprehensive case study on utilizing municipal solid waste for potential hydrogen production. The energy and exergy efficiencies for hydrogen production are found to be 57% and 55% respectively, with good agreement achieved with previous studies. The waste can be converted to hydrogen through a series of processes, including gasifier, cyclone, catalytic reactor, and pressure swing adsorption.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Green & Sustainable Science & Technology
Arda Yapicioglu, Ibrahim Dincer
Summary: In this study, a renewable energy-driven multigenerational system is developed to generate electricity, cooling, freshwater, and hydrogen. Solar and wind energy are combined with electric heating to heat sand particles, which are then pressurized and heated in a fluidized bed heat exchanger to produce electricity. The leftover steam is used for absorption cooling, freshwater production, and hydrogen generation. The energy can be stored in the form of sand for later use. The system is cost-effective and environmentally friendly, with energy and exergy efficiencies of 53.3% and 49.8%, respectively.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Thermodynamics
Moslem Sharifishourabi, Ibrahim Dincer, Atef Mohany
Summary: The study focuses on the use of renewable energy sources to develop a multigeneration system for residential communities and evaluates its performance in terms of energy and exergy efficiencies. It analyzes the system using mass, energy, entropy, and exergy balance equations, and employs various cycles such as Rankine, Brayton, and organic Rankine cycles. The results show the energy and exergy efficiencies of these cycles, as well as the coefficients of performance of the absorption cooling system.
APPLIED THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Monjur Mourshed, Nahid Imtiaz Masuk, Huy Quoc Nguyen, Bahman Shabani
Summary: This paper experimentally investigates the effects of simultaneous air and water cooling on the energy performances of a single-pass hybrid PV/T system. The study finds that the overall efficiency of the system is dependent on the solar intensity and mass flow rate of coolants. The introduction of simultaneous air and water cooling significantly increases the efficiency and thermal energy outputs of the PV/T system.
Article
Thermodynamics
Merve Ozturk, Ibrahim Dincer
Summary: This study presents a novel integrated system for geothermal-based power generation and hydrogen production, as well as blending hydrogen into natural gas for household devices. The combustion efficiency and emissions of the blend are found to be influenced by the hydrogen fraction in natural gas.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Thermodynamics
Yarkin Gevez, Ibrahim Dincer
Summary: This study presents a novel integrated energy system based on renewable geothermal energy source with a Copper Chlorine (CuCl) thermochemical cycle for hydrogen production production and a multistage desalination subsystem for freshwater production. The system achieves high efficiency in terms of energy and exergy through thermodynamic analysis. Parametric studies are conducted to observe the effects of different conditions on the system.
APPLIED THERMAL ENGINEERING
(2022)
Article
Chemistry, Physical
Victor Adebayo, Muhammad Abid, Michael Adedeji, Tahir Abdul Hussain Ratlamwala
Summary: A novel solid oxide fuel cell (SOFC) multi-generation system fueled by biogas derived from agricultural waste is designed and analyzed. The system aims to limit greenhouse gas emissions and produces electricity, hot water, hydrogen, and cooling load simultaneously. The proposed cascaded closed-loop organic Rankine cycle improves the thermal efficiency of the system. The study also explores the effects of main parameters on system performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Haseeb Kamran, Uzair Mudassir, Abdul Moiz Ali, Khurram Kamal, Tahir Abdul Hussain Ratlamwala, M. Abbas Raza, Karam Khan
Summary: MCFC is a viable source of renewable energy and its production requires time-consuming and costly processes. Mathematical modeling and efficiency simulations are necessary to maximize its performance. The integration of regenerative cycles, copper-chlorine cycle, and electric heater with PID controller can improve the overall system efficiency.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Shakeel Ahmed, Khurram Kamal, Tahir Abdul Hussain Ratlamwala, Senthan Mathavan, Ghulam Hussain, Mohammed Alkahtani, Marwan Bin Muhammad Alsultan
Summary: Accurate prediction of aerodynamic properties is crucial for applications involving fluid flows, and machine learning techniques have shown promising results in predicting the aerodynamic coefficients of airfoils.
APPLIED SCIENCES-BASEL
(2022)
Article
Thermodynamics
Khurram Altaf, Adeel Tariq, Syed Waqar Ahmad, Ghulam Hussain, T. A. H. Ratlamwala, Hafiz Muhammad Ali
Summary: This study focuses on optimizing the thermal performance of heatsinks by implementing slots while maintaining the pressure drop. Computational Fluid Dynamics analysis shows that the optimized heatsinks exhibit better thermal performance without compromising the pressure drop.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Energy & Fuels
Muhammad Sabbar Hassan, Khurram Kamal, Tahir Abdul Hussain Ratlamwala
Summary: This research focuses on detecting and classifying power plant faults using intelligent artificial neural network approach. The findings show that both Levenberg-Marquardt and Bayesian regularization methods have high accuracy in detecting and classifying faults, with LM algorithm having faster training speed. The neural network-based methods are effective in detecting and classifying faults with good performance.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Article
Materials Science, Multidisciplinary
Mushtaq Ali, Tahir Abdul Hussain Ratlamwala, Ghulam Hussain, Tauheed Shehbaz, Riaz Muhammad, Muhammad Aamir, Khaled Giasin, Danil Yurievich Pimenov
Summary: In this study, a new machining approach called aqueous machining is applied for mill machining and compared with traditional wet machining. The results show that aqueous machining has lower surface roughness and higher surface hardness, as well as energy gains, suggesting potential for sustainable machining in the future.
Article
Chemistry, Physical
Muhammad Nihal Naseer, Khurram Kamal, Muhammad Abid, Asif Iqbal, Hamdullah Khan, Ch. Muhammad Zubair, Sagar Kumar, Tahir Abdul Hussain Ratlamwala, Malik Muhammad Nauman
Summary: Energy production from clean and green sources is a major challenge. The integration of fuel cells and biogas offers a promising solution to reduce CO2 emissions. This study contributes by developing a self-sustaining biogas-fuel cell system for cold areas.
INTERNATIONAL JOURNAL OF PHOTOENERGY
(2022)
Article
Energy & Fuels
Sheikh Muhammad Ali Haider, Tahir Abdul Hussain Ratlamwala, Khurram Kamal, Fahad Alqahtani, Mohammed Alkahtani, Emad Mohammad, Moath Alatefi
Summary: This study proposes a multigeneration system using geothermal energy, which can generate power, space heating, cooling, fresh and hot water, dry air, and hydrogen as valuable by-products. The system includes a regenerative Rankine cycle, a double effect absorption cycle, and a double flash desalination cycle. It produces a significant amount of electrical power, hydrogen, and fresh water for commercial or domestic use. The power output is 103 MW, with thermal efficiency of 24.42%, energetic efficiency of 54.22%, and exergetic efficiency of 38.96%. The COPen is found to be 1.836 and the COPex is found to be 1.678. The production rates of hydrogen and fresh water are 0.1266 kg/s and 37.6 kg/s, respectively.
Article
Chemistry, Analytical
Mustajab Ahmed, Khurram Kamal, Tahir Abdul Hussain Ratlamwala, Ghulam Hussain, Mejdal Alqahtani, Mohammed Alkahtani, Moath Alatefi, Ayoub Alzabidi
Summary: This research utilized spectrograms of airborne acoustic emission data and a residual network to monitor the tool health of an end-milling machine. Different cutting tools were used and their acoustic emission signals were recorded for various cut depths. The trained model showed an overall classification accuracy of 99.7%, with 100% accuracy for classifying hardwood and 99.5% accuracy for classifying softwood.
Article
Chemistry, Physical
Humayun Arif, Aqueel Shah, Tahir Abdul Hussain Ratlamwala, Khurram Kamal, Maqsood Ahmed Khan
Summary: Population explosion, industrialization, and urbanization have increased global energy requirements, prompting the search for simple and cost-effective energy solutions. The addition of Shape Memory Alloy NiTiNOL to the Stirling engine has shown promising results in improving engine efficiency. The research focuses on changing the base plate material of the modified Stirnol engine and assessing its performance with the integration of a NiTiNOL spring.
Article
Biochemistry & Molecular Biology
Uzair Bhatti, Hamza Aamir, Khurram Kamal, Tahir Abdul Hussain Ratlamwala, Fahad Alqahtani, Mohammed Alkahtani, Emad Mohammad, Moath Alatefi
Summary: This research focuses on developing and analyzing multigeneration systems that utilize hybrid sources like biomass and wind. The goal is to optimize these systems to meet industrial requirements and provide various outputs, such as power, cooling, hydrogen, air conditioning, freshwater, hot water, and heating. The performance of the multigeneration cycle was assessed using energy and exergy analysis, and the study emphasized the consideration of thermodynamic, economic, and environmental aspects in configuration selection and design. The results determined the best location for this multigeneration system, with a wind turbine power output of around 7 MW, a biogas power output of 0.6 MW, and an overall exergy efficiency of 0.1401.
Article
Chemistry, Physical
Muhammad Sajid Khan, Tahir Ratlamwala, Mi Yan, Saadia Yousuf, Muhammad Abid
Summary: Waste-to-energy incineration is an effective solution to reduce waste and generate electricity. This study proposes a solar-integrated approach to improve the efficiency of conventional incineration plants and increase the production of freshwater and hydrogen.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Computer Science, Information Systems
Fawad Khan, Khurram Kamal, Tahir Abdul Hussain Ratlamwala, Mohammed Alkahtani, Mohammed Almatani, Senthan Mathavan
Summary: This study discusses the use of deep learning, specifically LSTM, for monitoring the condition of tools in the manufacturing industry. The results demonstrate the model's high accuracy in predicting tool failures for different workpiece materials.
Article
Multidisciplinary Sciences
Adeel Asghar, Tahir Abdul Hussain Ratlamwala, Khurram Kamal, Mohammed Alkahtani, Emad Mohammad, Senthan Mathavan
Summary: This study utilizes a regression-based prediction technique using neural networks to accurately predict the power output of a combined cycle power plant and compares it with actual data. The study finds that temperature has a significant impact on the performance of the power plant, and the lower heating value of the fuel is an important factor affecting power output. The results suggest that data science techniques can substitute extensive thermodynamic calculations.
Article
Thermodynamics
Muhammad Sajid Khan, Muhammad Abid, Mi Yan, Tahir Abdul Hussain Ratlamwala
Summary: In this study, a novel multi-generation system was investigated for its electricity generation, heating, cooling, thermal energy storage and hydrogen production capabilities. The integrated system showed overall energy and exergy efficiency of 51.62% and 53.45% respectively, with a hydrogen production rate of 0.00742 kg/s.
INTERNATIONAL JOURNAL OF EXERGY
(2021)
