Article
Thermodynamics
Muhammed Arslan, Ceyhun Yilmaz
Summary: The use of biomass in energy conversions is crucial for a renewable and sustainable energy future. This study investigates the recovery of waste heat from exhaust gases in a biogas power plant using an integrated Organic Rankine Cycle. The results show that waste heat recovery improves the net power production and economic performance of the biogas power plant.
Article
Thermodynamics
Jui-Ching Hsieh, Chun-Chieh Lai, Yen-Hsun Chen
Summary: The performance and economy of a waste heat recovery system with a fin tube heat exchanger and an organic Rankine cycle system were investigated. It was found that the temperature and mass flow rate of the flue gas had positive and negative effects on the output power, while the evaporation temperature had a positive effect on the effectiveness of the heat exchanger. Furthermore, the system performance and economy can be improved by adjusting the flow rate of the working fluid through the expander.
Article
Thermodynamics
Yuan Zhang, Shizhao Zhang, Hao Peng, Zhen Tian, Wenzhong Gao, Ke Yang
Summary: A one-dimensional model of the Tesla turbine was constructed to study the effects of different wet working fluids on the thermal performance of the turbine and ORC system. The results showed that the highest turbine efficiency was achieved with R22 as the working fluid, while the highest turbine output power and system thermal efficiency were achieved with R417a. It was also observed that the efficiency, output power, and thermal efficiency of the turbine increased monotonically with increasing rotor inlet radius.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Green & Sustainable Science & Technology
Ozum Calli, C. Ozgur Colpan, Huseyin Gunerhan
Summary: This paper presents the modeling and simulation of a solar and biomass powered organic Rankine cycle (ORC) system under part load behavior. Exergy based thermoeconomic analysis is applied to determine electricity cost throughout the year. A case study shows that supplying electricity demand with both the ORC and the electrical power grid costs $5238.6 per year, which is 30% more profitable than that with only the electrical power grid.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Thermodynamics
Lukasz Witanowski, Pawel Ziolkowski, Piotr Klonowicz, Piotr Lampart
Summary: Energy conversion efficiency is crucial for power systems and optimizing the components of a power plant can enhance efficiency. This study focuses on the 3D blade shape optimization of a 10 kW single-stage radial inflow turbine using hybrid stochastic/deterministic methods. Eight algorithms, including stochastic, deterministic, and hybrid ones, were compared and principal component analysis was used for process analysis. The optimized geometries showed an efficiency increase of over 2 pp. validated on refined grids, with a total-to-static efficiency of 90.6% achieved at the nominal point using a hybrid method.
Article
Thermodynamics
Bensi Dong, Yongjie Wang, Guoqiang Xu, Jie Wen, Yongkai Quan
Summary: This paper investigates the aerodynamic performance of a single-stage axial turbine for high-temperature ORC system through numerical simulation. The results show that the turbine efficiency is 77% at the design point and can be maintained above 70% as the pressure ratio reaches 6. Low Reynolds number flow and negative incidence angle are the main reasons for low turbine efficiency under low pressure ratio, while shock wave becomes the key factor influencing turbine efficiency under high pressure ratio.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Thermodynamics
Lukasz Witanowski, Piotr Klonowicz, Piotr Lampart, Pawel Ziolkowaki
Summary: This paper focuses on the multi-objective efficiency optimization of a one-stage axial ORC turbine using an Implicit Filtering algorithm. The efficiency is improved in both modes of operation by changing the rotor profiles and the shape of endwall contours of the rotor domain.
Article
Energy & Fuels
Dwi Setiawan, Rifan Adi Kusuma, I. Dewa Made Subrata, Y. Aris Purwanto, Armansyah H. Tambunan
Summary: The expander is a crucial component in the Organic Rankine Cycle (ORC), with the study showing that reversing the operation of the compressor can improve efficiency and performance in the system.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2021)
Article
Thermodynamics
M. Hatef Seyyedvalilu, V Zare, F. Mohammadkhani
Summary: Two novel trigeneration cycles based on AHTs are proposed for power generation, freshwater production, and heating effects using low-temperature geothermal energy, with high efficiency and economic performance. The double-effect AHT system shows the highest power output and is significantly influenced by the temperatures of AHT components.
Article
Thermodynamics
Juergen Krail, Georg Beckmann, Florian Schittl, Gerhard Piringer
Summary: This paper analyses an improved ORC process that injects a liquid working fluid stream into the vapor flow between high-pressure and medium-pressure stages of the turbine, and replaces the recuperator with a spray condenser to increase efficiency with moderate changes in the process layout. Thermodynamic comparison of the improved process with a state-of-the-art ORC process is carried out through simulations and optimizations. The improved process achieves a significant efficiency gain by increasing the mass flow in the economizer of the vapor generator and corresponding mass flow in the medium stage of the turbine.
Article
Thermodynamics
Jinbo Qu, Yongming Feng, Yuanqing Zhu, Song Zhou, Wenping Zhang
Summary: In the context of global decarbonization, there is increasing focus on improving the energy efficiency of marine power plants, with the use of a high-efficiency waste heat recovery system that can generate up to 1,079.1 KW of power at 100% load. The system demonstrated stable operation and high thermal efficiency and exergy efficiency at 90% load. Further techno-economic evaluation showed a payback period of 5.2 years for the system.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Energy & Fuels
Mario Klun, Zvonimir Guzovic, Predrag Raskovic
Summary: An innovative axial multistage turbine with partial admission for a bottoming ORC system was investigated in this study, achieving significant improvements in power and efficiency on a 537 kW biogas internal combustion engine.
Article
Thermodynamics
A. Habibollahzade, K. J. Petersen, M. Aliahmadi, I Fakhari, J. R. Brinkerhoff
Summary: The study found that transcritical-CO2 systems can generate the highest power and have a levelized cost of electricity ranging from 0.12 to 0.16 $/kWh. Additionally, transcritical-CO2 configurations have the lowest payback period and achieve the highest efficiencies.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Maziyar Hekmatshoar, Mahdi Deymi-Dashtebayaz, Mohammad Gholizadeh, Daryoush Dadpour, Mostafa Delpisheh
Summary: This study proposes a geothermal-driven multi-generation system that can cogenerate power, freshwater, and hydrogen. Through numerical modeling and optimization, it is found that the system can significantly reduce carbon dioxide emissions and save taxes compared to fossil fuels, while producing freshwater and hydrogen with different geothermal water mass flow rates.
Article
Thermodynamics
Guangli Fan, Yingjie Gao, Hamdi Ayed, Riadh Marzouki, Yashar Aryanfar, Fahd Jarad, Peixi Guo
Summary: The study shows that adding a recovery section to a single flash geothermal cycle can significantly improve system performance, increasing thermal efficiency, exergy efficiency, and overall output, while also reducing LCE from an economic perspective.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Materials Science, Ceramics
Mohammad Vajdi, Farhad Sadegh Moghanlou, Sahar Nekahi, Zohre Ahmadi, Amir Motallebzadeh, Haleh Jafarzadeh, Mehdi Shahedi Asl
CERAMICS INTERNATIONAL
(2020)
Article
Materials Science, Ceramics
Kourosh Vaferi, Mohammad Vajdi, Sanam Nekahi, Sahar Nekahi, Farhad Sadegh Moghanlou, Mehdi Shahedi Asl, Mohsen Mohammadi
Summary: In this study, SiC reinforced HfB2 and ZrB2 ultrahigh temperature ceramics were proposed as gas turbine stator blades. Numerical analysis showed that adding SiC reduces thermal conductivity and temperature uniformity, but ZrB2-SiC exhibited the best performance. Both blades made of HfB2-SiC and ZrB2-SiC composites were able to withstand applied stresses with safety factors of about 1.5 according to failure analyses.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Farhad Sadegh Moghanlou, Mohammad Vajdi, Haleh Jafarzadeh, Zohre Ahmadi, Amir Motallebzadeh, Fariborz Sharifianjazi, Mehdi Shahedi Asl, Mohsen Mohammadi
Summary: The effects of adding graphene nano-platelets on the microstructure and thermal diffusivity and conductivity of TiN-based ceramics were investigated, revealing reduction in relative density but a fine-grained microstructure. X-ray diffraction analysis disclosed the formation of titanium carbonitride during sintering. The TiN-6 wt% graphene sample exhibited lower thermal conductivity due to its smaller grain size compared to monolithic TiN.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Mechanical
Farhad Sadegh Moghanlou, Amin Shams Khorrami, Esmaeil Esmaeilzadeh, Mohammad Vajdi
Summary: This study investigates the heat transfer and pressure drop of Alumina/oil nanofluid flow in a miniaturized square channel under the influence of strong DC electric fields. The results indicate that increasing particle concentration enhances heat transfer, while applying a strong electric potential significantly improves heat transfer efficiency, primarily through the formation of secondary fluid flows and particle motion.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2021)
Article
Thermodynamics
Hossein Azariyan, Mohammad Vajdi, H. Rostamnejad Takleh
Summary: The novel multigeneration system utilizes geothermal energy, Kalina cycle, absorption refrigeration system, and electrolyzer to produce power, cooling, and hydrogen efficiently. The system has been evaluated thermodynamically and exergoeconomically, showing high efficiencies and the highest exergy destruction rate in condenser 1.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Materials Science, Ceramics
Elaheh Ranjbarpour Niari, Mohammad Vajdi, Milad Sakkaki, Shahla Azizi, Farhad Sadegh Moghanlou, Mehdi Shahedi Asl
Summary: Spark plasma sintering is an interesting manufacturing method that benefits from electric current heating. In this study, the sintering process of hafnium diboride ceramics was simulated using the finite element method and COMSOL Multiphysics software. The results showed the required temperature for sintering and the distribution of electric current in the system.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
Article
Thermodynamics
H. Rostamnejad Takleh, V. Zare, F. Mohammadkhani, M. M. Sadeghiazad
Summary: An efficient solar-geothermal system is proposed for cooling, heating, and power generation. The system is optimized using energy, exergy, and thermoeconomic analyses for three different working fluids. The results show that the system performs best when using R423A as the working fluid, achieving high energy efficiency and cost savings.
Article
Engineering, Mechanical
Mehran Abdolalipouradl, Vahid Mousavi, Farzad Mohammadkhani, Mortaza Yari
Summary: This study compares different configurations for utilizing geothermal energy and identifies more efficient methods. The results show that triple flash type I cycle has the highest net output power and exergy efficiency.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2022)
Article
Chemistry, Physical
Ali Akbar Darabadi Zare, Mortaza Yari, Hossein Nami, Farzad Mohammadkhani
Summary: The development of distributed multigeneration energy systems is shifting the focus from large centralized plants to local energy systems. A novel multigeneration system is designed to meet domestic energy demands of power, hydrogen, and heating. The system consists of a supercritical CO2 cycle, a gas turbine with a rich-fueled combustion chamber, a membrane for hydrogen separation, and a water-gas shift reactor. Thermodynamic analysis reveals the combustion chamber as the major source of irreversibility and hydrogen can be produced and stored. The estimated cost of producing hydrogen ranges from 2.2-6.8 $/kg.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Thermodynamics
Ali Akbar Darabadi Zare, Mortaza Yari, Hossein Nami, Farzad Mohammadkhani
Summary: An integrated energy system is investigated in this study, considering the thermodynamic and economic aspects. The system includes steam methane reforming, chemical looping combustion, gas turbine, water gas shift reactor, carbon storage, palladium membrane, and organic Rankine cycle. It can generate power, hydrogen, and heat while benefiting from heat integration between steam methane reforming and chemical looping combustion, thus reducing environmental pollution.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Physics, Multidisciplinary
Kourosh Vaferi, Mohammad Vajdi, Amir Shadian, Hamed Ahadnejad, Farhad Sadegh Moghanlou, Hossein Nami, Haleh Jafarzadeh
Summary: The Tesla valve is a non-moving check valve that controls fluid flow without external power. Its unique geometry causes more pressure drop in the reverse direction than in the forward direction. This study investigated a Tesla valve with unconventional geometry through numerical analysis, and used prediction models to optimize its performance in heat transfer applications.
Article
Engineering, Environmental
S. H. Khodaparast, V. Zare, F. Mohammadkhani
Summary: This research proposes two efficient configurations, a Claude cycle and a geothermal driven organic Rankine cycle integrated with a hydrogen liquefaction system, to compensate for the consumed power. A comprehensive thermoeconomic assessment and parametric study were conducted to determine the best scheme under various operating conditions. The results emphasize the vital importance of integrated modeling of the liquid nitrogen supply unit with the hydrogen liquefaction system.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Multidisciplinary Sciences
Kourosh Vaferi, Mohammad Vajdi, Sahar Nekahi, Amir Heydari, Farhad Sadegh Moghanlou, Hossein Nami, Haleh Jafarzadeh
Summary: This research aims to optimize heat transfer and pressure drop in a bionic fractal heat sink using artificial neural network and response surface methodology. The results show that both models can accurately predict heat transfer and pressure drop, and determine the optimal design parameters. Additionally, testing different materials reveals that reducing thermal conductivity increases thermal resistance and decreases overall performance of the heat sink.
Article
Engineering, Multidisciplinary
T. Adibi, S. E. Razavi, O. Adibi, M. Vajdi, F. Sadegh Moghanlou
Summary: This study numerically investigated forced, free, and mixed convections in incompressible flow using nano-fluids, consisting of nano-sized Al2O3, TiO2, MgO, and ZnO ceramics mixed with water. The results showed that MgO-water and ZnO-water had the maximum and minimum heat transfer rates, respectively, and the use of nano-fluids increased heat transfer rates by 15-37%.
Article
Engineering, Chemical
Abbas Sabahi Namini, Seyed Ali Delbari, Nilgun Baydogan, Mohammad Vajdi, Farhad Sadegh Moghanlou, Mehdi Shahedi Asl
Summary: This research evaluated the impact of five nitride additives on TiC-based materials, showing that AlN enhanced relative density while Si3N4 had the most detrimental influence. Besides BN contributing to the finest microstructure, AlN had the greatest effect on thermal conductivity.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
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)
