Article
Energy & Fuels
Xialai Wu, Ning Zhang, Lei Xie, Wenyan Ci, Junghui Chen, Shan Lu
Summary: This study proposes a thermoeconomic optimization strategy to recover waste heat from various exhaust gas conditions of a light-duty vehicle. By selecting organic working fluids with higher critical temperatures, lower investment costs and higher net output power can be achieved. Compared with a thermodynamic optimization method with net output power as the optimized objective, the proposed strategy is more economically efficient.
Article
Thermodynamics
E. Galloni
Summary: The study investigates the potential of an ORC-based heat recovery system for light duty vehicles and analyzes its performance at different cruising speeds. It is found that the system operation needs to be carefully adjusted according to the engine operating point, leading to a recovery of nearly 6% of heat carried by exhaust gases on average.
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
Monika Nikolaisen, Trond Andresen
Summary: Applying Rankine cycles to smelter off-gas can significantly impact required off-gas fan power. Predicting fan power is complex due to conflicting factors, with heat recovery increasing power and off-gas cooling reducing it. Understanding the downstream pressure loss is crucial for optimizing system performance.
Article
Thermodynamics
Stijn Broekaert, Theodoros Grigoratos, Dimitrios Savvidis, Georgios Fontaras
Summary: Experiment results show that heavy-duty vehicles equipped with waste heat recovery systems can indeed reduce fuel consumption in different driving cycles, but do not significantly reduce pollutant emissions. The Vehicle Energy Consumption calculation Tool (VECTO) used for simulating on-road trips can accurately predict fuel consumption.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Jelmer Rijpkema, Olof Erlandsson, Sven B. Andersson, Karin Munch
Summary: This study investigates the performance of a Rankine cycle for waste heat recovery using water, cyclopentane, and ethanol as working fluids, and validates the steady-state performance of the system under different operating conditions using experimental data.
Article
Computer Science, Interdisciplinary Applications
Hon Huin Chin, Bohong Wang, Xuexiu Jia, Min Zeng, Vit Freisleben, Petar Sabev Varbanov, Jiri Rijaromir Klemes
Summary: Heat Integration (HI) requires precise knowledge and complex calculations, and the SPIL-HX software package can provide functionality for engineers to design and evaluate heat exchangers, as well as provide design solutions for waste gas oxidizers and automatic heat exchanger network synthesis and retrofit.
COMPUTERS & CHEMICAL ENGINEERING
(2022)
Article
Thermodynamics
Quentin Blondel, Nicolas Tauveron, Guillaume Lhermet, Nadia Caney
Summary: This study provides correlations for predicting the two-phase heat transfer coefficients of Hydrofluoroethers pure fluids and zeotropic mixtures used in plate heat exchangers, based on the known scientific literature. The correlations, which use dimensionless numbers and the critical properties of the working fluids, show promising results. This study also investigates the behavior of heat sources and working fluids in organic Rankine cycle and highlights the complexity of using zeotropic mixtures.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Guokun Liu, Yanzhou Qin, Dongxu Ji
Summary: This study selects organic fluid (R245fa) with low boiling temperature for phase change cooling of PEMFC stack and employs organic Rankine cycle (ORC) for waste heat recovery. The effect of channel layout, sectional size, and channel shape on cooling and heat recovery performance is investigated through simulation of boiling flow. The results demonstrate the good cooling performance of flow boiling, as the cooling plates can be cooled to a reasonable temperature with a maximum surface temperature difference within 15 K. The serpentine straight channel and spiral straight channel achieve the highest ORC thermal efficiency of 7%, while the serpentine zigzag channel has the best temperature uniformity contribution due to its secondary circulation flow. This study showcases the potential of flow boiling for PEMFC thermal management and provides guidance for cooling channel design.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
D. Di Battista, M. Di Bartolomeo, R. Cipollone
Summary: Energy recovery from exhaust gases is an important solution for sustainable propulsion, with the ability to transform thermal energy into electrical energy. The study tested a turbocharged diesel engine equipped with a variable geometry turbine to assess the maximum recoverable energy, demonstrating a reduction in specific fuel consumption of approximately 5-7% at medium-low operating regions.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Benoit Michel, Nicolas Dufour, Clementine Bortlein, Camille Zoude, Elodie Prud'homme, Laurent Gremillard, Marc Clausse
Summary: This study evaluates the performance of a heat exchanger coated with CaCl2 in thermochemical heat transformers for industrial waste heat recovery. Experimental tests were conducted, and a model heat exchanger plate was used to compare two configurations: a thick layer of CaCl2 representing a packed bed reactor (reference) and a CaCl2-PVA deposit representing a coated reactor. The results show that the coated heat exchanger achieves higher performance, with a specific power of up to 341 W/kg for a temperature lift of 63 K. However, repeatability tests revealed changes in temperature profiles, indicating a change in properties of the CaCl2/PVA compound material. Future steps include improving the material formulation and deposit protocol, as well as conducting tests at a smaller reactor scale to assess system performance.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Fu Wang, Lei Wang, Houcheng Zhang, Lan Xia, He Miao, Jinliang Yuan
Summary: The study shows that integrating SOEC with marine diesel engines can achieve high-efficiency hydrogen production and waste heat recovery. Sensitivity analysis of key parameters such as current density, H2O flow rate, and SOEC area reveals optimal operating conditions.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Review
Engineering, Environmental
Mohammad Ja'fari, Muhammad Imran Khan, Sami G. Al-Ghamdi, Artur J. Jaworski, Faisal Asfand
Summary: In energy intensive industries, the use of ORC technology for waste heat recovery can enhance energy efficiency, reduce carbon emissions, and provide a solution for energy saving in the iron and steel sector, contributing to the fight against climate change.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Lingfeng Shi, Wen Xu, Xiaonan Ma, Xuan Wang, Hua Tian, Gequn Shu
Summary: An integrated design of a silencing heat exchanger that merges an exhaust heat exchanger with an impedance composite muffler has been proposed in this study. By utilizing metal foam material instead of sound absorbing material, the modified silencing heat exchanger achieved improved heat transfer and flow performance, as well as enhanced silence effect in the middle and high frequency band. The overall transmission loss was found to be 44.4% higher than the basic structure, with an 8.4% reduction in exhaust pressure drop.
APPLIED THERMAL ENGINEERING
(2022)
Article
Engineering, Environmental
Selcuk Selimli, Khaled Mohamed Ashnaaf Abajja
Summary: Through experimental study, it is confirmed that graywater heat recovery with a wire on a tube heat exchanger can reduce energy consumption and processing time of household dishwashers, leading to a decrease in CO2 emissions.
WATER ENVIRONMENT RESEARCH
(2021)
Article
Thermodynamics
Fabio Fatigati, Marco Di Bartolomeo, Davide Di Battista, Roberto Cipollone
Summary: Sliding vane rotary expanders (SVREs) are widely used in ORC-based power units for low-grade heat recovery due to their ability to handle off-design working conditions effectively. A control strategy based on the variation in revolution speed of a SVRE, with inlet pressure of the expander as the main controlled property, has been developed to improve thermal power recovery. Experimental activities on a SVRE operating in an ORC-based power unit have shown that the proposed control strategy leads to higher expander global efficiencies and mechanical energy recovery.
APPLIED THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Davide Di Battista, Chiara Barchiesi, Luca Di Paolo, Simona Abbate, Sara Sorvillo, Andrea Cinocca, Roberto Carapellucci, Dario Ciamponi, Dina Cardone, Salvatore Corroppolo, Roberto Cipollone
Summary: Territorial energetic and environmental planning plays a crucial role in sustainable development, utilizing scientific methodology and statistical models to estimate energy consumption behaviors and focusing on municipal competences to achieve emission reduction goals.
Article
Engineering, Chemical
Fabio Fatigati, Andrea Di Giuliano, Roberto Carapellucci, Katia Gallucci, Roberto Cipollone
Summary: The production of blue hydrogen through sorption-enhanced processes, such as SESMR, offers efficient hydrogen production with substantial energy self-sufficiency, representing a 10% improvement in energy efficiency compared to traditional SMR processes.
Article
Thermodynamics
G. Di Giovine, L. Mariani, D. Di Battista, R. Cipollone, F. Fremondi
Summary: This study aims to assess the potential of screw pumps to replace traditional centrifugal pumps for engine cooling, with a novel mathematical model predicting their performances. The experimental results show that the triple-screw pump has an average efficiency about 8% greater than that of the centrifugal pump, leading to an energy saving equal to 18.5%.
APPLIED THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Fabio Fatigati, Giammarco Di Giovine, Roberto Cipollone
Summary: The main driver of research in the road transportation sector is the reduction of CO2 emissions from internal combustion engines, with Wasted Heat Recovery (WHR) technology being a promising solution. The proper design and selection of expanders, such as scroll machines, are crucial to tackle the issues when scaling down the recovery unit to small applications. Dual-intake-port (DIP) technology can enhance the performance of scroll machines, leading to a 25% increase in mechanical power without modifying the pressure ratio.
Article
Green & Sustainable Science & Technology
Simona Abbate, Luca Di Paolo, Roberto Carapellucci, Roberto Cipollone
Summary: This paper discusses the carbon uptake dynamics generated by managing unused lands to fulfill international commitments on atmospheric CO2. Using a genetic algorithm, the paper identifies operational sequences to ensure specific outcomes in carbon capture, providing a new perspective on compensating for urban carbon emissions.
Article
Thermodynamics
Fabio Fatigati, Diego Vittorini, Marco Di Bartolomeo, Roberto Cipollone
Summary: This study presents the integration of a Micro-Organic Rankine Cycle (ORC) power unit with conventional solar flat plate collectors to meet both electricity and domestic hot water demands. Experimental assessments show the plant's wide operability and robustness under different operating conditions.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Environmental Sciences
Michela Costa, Daniele Piazzullo, Davide Di Battista, Angelo De Vita
Summary: Energy generation from waste renewable sources, such as biomass, can provide green power with environmental benefits. However, the variability in these sources poses challenges for their intensified use. This study assesses the technical, environmental, and economic impacts of a biomass-to-energy supply chain, focusing on a commercially available CHP system. The analysis includes the evaluation of pretreatment operations and the overall environmental impact of the plant.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Energy & Fuels
Matteo Marchionni, Fabio Fatigati, Marco Di Bartolomeo, Davide Di Battista, Mario Petrollese
Summary: ORC power units offer potential for waste heat recovery in internal combustion engines, reducing emissions while maintaining performance. Understanding their transient response is crucial for optimizing performance and ensuring proper operation of main components.
Article
Green & Sustainable Science & Technology
Luca Di Paolo, Simona Abbate, Eliseo Celani, Davide Di Battista, Giovanni Candeloro
Summary: Single-use plastic has a significant environmental impact and reducing its use is crucial in reducing global plastic pollution. This work presents a methodology for evaluating the carbon footprint of different single-use plastic categories and comparing them with compostable and bioplastic alternatives. A case study demonstrates the potential reduction in CO2 equivalent emissions by replacing plastics with bioplastics or other materials.
Review
Energy & Fuels
Davide Di Battista, Roberto Cipollone
Summary: Internal Combustion Engines (ICE) are undergoing a transition era driven by environmental concerns, such as emission reduction and fuel saving. The transportation sector is expected to shift towards full electric propulsion with the help of modifications, hybridization, and waste heat recovery (WHR). WHR is particularly interesting as it allows for the recovery of wasted energy and integration with other thermal streams. Overall, technologies that can improve fuel consumption and engine efficiency without major changes to the engine layout are highly valuable.
Article
Energy & Fuels
Carlo Villante
Summary: Energy systems need complete decarbonization within the next 20-30 years, requiring the introduction of CO2-free renewable energy sources. All users, including the transportation sector, should transition to electrification. This presents both challenges and opportunities for the electric grid.
Article
Engineering, Electrical & Electronic
Carlo Villante, Stefano Ranieri, Francesco Duronio, Angelo De Vita, Michele Anatone
Summary: Electricity from renewable energy sources represents the most promising way to decarbonize energy systems. A grid connection of car Electricity Storage Systems (ESSs) represents an opportunity to tackle issues regarding electricity production non-programmability, only if sufficiently smart bi-directional Vehicle to Grid technologies (V2G) are widely implemented.
WORLD ELECTRIC VEHICLE JOURNAL
(2022)
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)