Article
Thermodynamics
Xuyue Chen, Xu Du, Jin Yang, Deli Gao, Yiqi Zou, Qinyi He
Summary: This study proposes an innovative method for developing offshore natural gas hydrate (NGH) from existing oil & gas platforms and investigates its recovery performance through numerical simulation. The results show that this method can significantly reduce NGH concentration and produce a large amount of natural gas, with bottom hole pressure and formation temperature being the key controlling factors, and the production mode of continuous injection-intermittent production being the most effective.
Article
Nanoscience & Nanotechnology
Yang Zhao, Mingzhao Yang, Man Li, Hongsheng Dong, Yang Ge, Qingping Li, Lunxiang Zhang, Yu Liu, Lei Yang, Yongchen Song, Jiafei Zhao
Summary: Efficient gas enrichment methods are crucial for the storage, transportation, and sequestration of clean energy and carbon dioxide. A novel recyclable hydrate promoter has been developed, which effectively reduces the induction time of methane hydrate formation, increases gas storage capacity, and inhibits foam during hydrate decomposition. Additionally, this promoter enhances CO2 storage capacity and shows potential for sequestering CO2 in the form of gas hydrate under the seafloor.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Energy & Fuels
Zihua Shao, Jintang Wang, Kaihe Lv, Bo Liao, Zonglun Wang, Yujing Bai, Ren Wang, Jinsheng Sun
Summary: A new type of hydrate dissociation inhibitor was studied using both experimental and molecular dynamics methods. The experimental results showed that this zwitterionic compound had an inhibitory effect on hydrate dissociation, and a kinetic model was validated using the experimental data. Molecular dynamics simulations revealed that the charged functional groups improved the interaction between the inhibitor and methane hydrate, and the sulfonate group had a strong hydration ability that affected the distribution of water molecules in the water phase.
Article
Energy & Fuels
Ngoc N. Nguyen, Vinh T. La, Chinh D. Huynh, Anh Nguyen
Summary: Carbon capture and storage (CCS) is crucial for reducing CO2 emissions and achieving climate change targets. Hydrate-based carbon capture (HBCC) is a promising and potentially competitive method, but slow kinetics and limited industrial experience present challenges for deployment.
Article
Engineering, Marine
Qiaobo Hu, Yanlong Li, Nengyou Wu, Jiaxin Sun, Qiang Chen, Xiaofeng Sun
Summary: This study conducts creep tests on hydrate-bearing sediments (HBS) and proposes a modified creep model to describe the creep behavior and long-term strength decay of HBS. The results show that the creep deformation of HBS is enhanced with the decrease in hydrate saturation, and the long-term strength decays linearly with decreasing hydrate saturation and effective confining pressure. The proposed model can describe the whole failure process, especially the accelerated creep stage. The findings have implications for predicting the nonlinear failure behaviors of the reservoir during long-term natural gas hydrate mining.
Article
Thermodynamics
Xuejun Chen, Hailong Lu, Lijuan Gu, Shilong Shang, Yi Zhang, Xin Huang, Le Zhang
Summary: Several trial productions of NGH have been implemented, but none of them has been verified applicable to commercial exploitation. In this study, the economic potential of each exploitation technology for NGH is evaluated, and depressurization is found to be the most promising method. Further technological breakthroughs are needed for the commercial exploitation of NGH.
Article
Geosciences, Multidisciplinary
Vanessa Monteleone, Hector Marin-Moreno, Gaye Bayrakci, Angus Best, Farhana Shaon, Mohammad Moinul Hossain, Ahmad Al Karim, Md Khurshed Alam
Summary: This study investigates the gas hydrate potential in the offshore Bangladesh, providing evidence for the first occurrence of natural gas hydrate in the area through analysis of seismic reflection profiles and modeling of the gas hydrate stability zone. The research reveals high amplitude reflections, Bottom Simulating Reflectors, and other features related to gas hydrate in the region.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Jiliang Wang, Shiguo Wu, Jin Sun, Wanli Feng, Qingping Li
Summary: In a submarine canyon-incised continental slope in the Shenhu area of the South China Sea, a combination of 3D seismic data, well logs, and in-situ borehole temperature measurements allowed for a comprehensive study of the gas hydrate stability zone. In-situ borehole temperature measurements revealed a nonlinear geothermal gradient within shallow marine sediments, impacting the match between predicted BGHSZ and observed BSR depths. Topographic effects, including the distribution of canyons and inter-canyon ridges, were found to influence the gas hydrate system, resulting in a curved BGHSZ that facilitates gas hydrate concentration by enlarging accumulation space and sealing free gas below.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Energy & Fuels
Lingbao Wang, Huashan Li, Xianbiao Bu
Summary: This paper proposes the binary flashing cycle (BFC) technology for enhanced geothermal systems (EGS) and develops a detailed thermo-economic model. The study finds that greater geothermal well depth and brine flow rate improve system thermal performance, but may not always be beneficial for economic performance. The optimal depth and flow rate for minimum levelized energy cost are identified, along with the importance of operating parameters for economic benefits.
Article
Energy & Fuels
Yongmao Hao, Fan Yang, Jian Wang, Mingwu Fan, Shuxia Li, Shiwei Yang, Chuanming Wang, Xinhai Xiao
Summary: This paper investigates the impact of multilateral well exploitation technique on natural gas hydrates, utilizing simulation to study the mechanisms and changes in temperature, pressure, and hydrate concentration during gas production. Results show that the multilateral well technique significantly enhances the production capacity of hydrates.
Article
Thermodynamics
Feifei Wang, Kaixiang Shen, Zhilei Zhang, Di Zhang, Zhenqing Wang, Zizhen Wang
Summary: This study investigates the efficiency of natural gas hydrate production using radial horizontal wells. A multi-field coupling model is developed to describe the various processes involved and is verified using experiments. Simulation results show that radial horizontal wells have a larger and more significant effect on hydrate dissociation compared to vertical wells. Increasing the length and/or diameter of the radial horizontal wells enhances gas production rate. The study suggests that three branches are optimal for radial horizontal wells. This research provides valuable suggestions and theoretical reference for the development of natural gas hydrate reservoirs.
Article
Engineering, Environmental
Changrui Shi, Huiquan Liu, Lunxiang Zhang, Mingjun Yang, Yongchen Song, Jiafei Zhao, Zheng Ling
Summary: Sluggish formation kinetics is a challenge for the practical application of gas hydrate-based technologies. Carbon monoliths with controlled surface functional groups enhance the nucleating ability of methane hydrates. Carbonyl oxygen is identified as the most effective functional group in reducing induction time and enhancing formation kinetics. The turned hydrogen bonds near the CBCM surface contribute to the enhanced formation kinetics. Optimized carbonyl oxygen in CBCM significantly improves methane hydrate formation kinetics and storage capacity with outstanding cycle stability.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Thermodynamics
Tao Liu, Peng Wu, Zeshao You, Tao Yu, Qi Song, Yuanxin Song, Yanghui Li
Summary: Natural gas hydrate is a new energy source with enormous reserves and high carbon content. However, its exploitation can involve potentially hazardous solid-liquid-gas phase changes. Understanding the deformation behavior of sediment during hydrate dissociation is crucial for predicting the long-term stability of hydrate reservoirs. This study investigated the deformation behavior of remolded cores during thermal dissociation under anisotropic stress states. The results showed that hydrate dissociation can cause significant sediment deformation, with a deformation rate three orders of magnitude larger than before dissociation.
Article
Energy & Fuels
Xiaofang Lv, Jie Zhang, Yang Liu, Qianli Ma, Jiawen Xu, Shidong Zhou, Shangfei Song, Bohui Shi
Summary: Euler models suitable for hydrate slurry flow were established based on particle dynamics theory. The study found that the distribution of velocity, particle concentration, and turbulent kinetic energy in a curved pipe was more asymmetrical compared to a straight pipe. The increase in particle size led to increased velocity heterogeneity and concentration gradient, and the pressure drop factor increased with velocity, particle concentration, and particle size along the pipeline.
Article
Thermodynamics
Yongchen Song, Mengru Tian, Jia-nan Zheng, Mingjun Yang
Summary: This study investigates the thermodynamics characteristics during hydrate dissociation and finds that the dissociation rate is significantly influenced by the depressurization rate and gas space. During the constant pressure stage, ice formation can nearly quintuple the instantaneous rate of hydrate dissociation. These findings are of great importance for pressure control and efficiency optimization in the later period of methane hydrate exploitation.
Article
Engineering, Chemical
Tania Sadeghi, Iman Fakhari, Anders Andreasen, Ahmad Arabkoohsar
Summary: This study investigates the possibility of predicting the performance curves of multi-stage centrifugal natural gas compressors with offshore applications using data mining techniques, thereby eliminating the need for expensive experiments. The results show that it is possible to accurately predict the performance curves of compressors with limited samples, although marginal errors are inevitable.
CHEMICAL ENGINEERING COMMUNICATIONS
(2023)
Article
Thermodynamics
Nianci Lu, Lei Pan, Ahmad Arabkoohsar, Zhenxiang Liu, Jiaxing Wang, Simon Pedersen
Summary: This article proposes connecting district heating networks to combined cycle gas turbine (CCGT) plants as a thermal energy storage capacity, improving the flexibility of CCGTs. It focuses on developing an appropriate control strategy to effectively control the power-heat conversion and meet the heat and power demands of the connected network. By using load signal decomposition and synergistic load response, the proposed control strategy can reduce the gap between grid demand and CCGT power and ensure grid stability.
APPLIED THERMAL ENGINEERING
(2023)
Article
Ecology
Amin Amiri Delouei, Hasan Sajjadi, Meysam Atashafrooz, Mohammad Hesari, Mohamed Bechir Ben Hamida, Ahmad Arabkoohsar
Summary: Utilizing ultrasonic excitation as an active method, this study experimentally investigated the effects of ultrasonic excitation on the heat transfer rate in a fin-and-flat tube heat exchanger. A comprehensive parameter study was conducted, and the results showed that reducing the flow rate, ambient temperature, and air passing velocity increased the effects of ultrasonic excitation. The highest heat transfer enhancement was 70.11%, measured at the lowest air passing velocity and ambient temperature with a Reynolds number 2166.
Article
Thermodynamics
Mohsen Tavallaei, Mahmood Farzaneh-Gord, Ali Jabari Moghadam, Amir Ebrahimi-Moghadam
Summary: In this study, the influence of pillow-plate geometrical parameters and flow specification on the thermo-hydraulic performance of the pillow-plate heat exchanger (PPHE) is evaluated. A multi-objective optimization method is applied to find the optimal design of PPHE. The results show a conflict between increasing the performance evaluation criterion and decreasing the total entropy generation.
HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Mechanical
Seyed Amir Hosseini Baboli, Ahmad Arabkoohsar, Iman Seyedi
Summary: In this study, the thermal performance of a conventional polymer fuel cell parallel cooling channel was investigated numerically and optimized using computational fluid dynamics and the Taguchi method. The results showed that increasing fluid velocity, ethylene glycol concentration, and aluminum oxide nanoparticle concentration improved heat transfer and pressure drop performance. Reynolds number and nanoparticle percentage were identified as the most influential parameters for heat transfer rate and pressure drop.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2023)
Article
Thermodynamics
Mohammad Jamshidmofid, Mohammad Olfati, Ahmad Arabkoohsar, Abbas Abbassi
Summary: For the first time, this research investigates the influence of wavy orientations on entropy generation and exergy destruction in wavy microchannels with different types of aqueous nanofluids. Numerical simulations were conducted with two types of wavy microchannels (Left-Right and Up-Down) using silver, aluminum oxide, and hybrid silver-aluminum oxide nanofluids at different concentrations. The results show that the Left-Right wavy microchannel exhibits 20% lower exergy destruction compared to the Up-Down one, and utilizing nanofluids reduces exergy destruction, with the largest reduction observed in the case of silver nanofluid. Additionally, nanofluids enhance the effectiveness number while increased pumping power decreases it.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Thermodynamics
M. Hedeshi, A. Jalali, A. Arabkoohsar, A. Amiri Delouei
Summary: This paper experimentally investigates the simultaneous impacts of using nanofluid and ultrasonic vibrations in a double-pipe heat exchanger. The effects of adding nanoparticles and applying ultrasonic vibrations are studied using water-based Al2O3 nanofluid. The results show that both nanoparticles and ultrasonic vibrations have a positive effect on the heat exchanger's performance, especially at higher inlet hot fluid temperatures and higher nanofluid concentrations. The effectiveness-NTU analysis demonstrates that using nanofluid and ultrasonic-excited nanofluid can significantly increase the thermal system's efficiency.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Green & Sustainable Science & Technology
Ali Tavakoli, Mahmood Farzaneh-Gord, Amir Ebrahimi-Moghadam
Summary: This study evaluates the thermo-hydraulic performance of utilizing sinusoidal internal fins and phase change material (PCM) in LHTES systems. A numerical framework is developed to analyze the geometrical parameters of the fins and investigate different heat transfer and thermodynamic characteristics. The results show that the highest growth of liquid fraction and the lowest entropy generation are achieved in case 4, with H/L = 0.125 and a thickness of 3mm, compared to a case with simple straight fins.
Article
Thermodynamics
Ehsanolah Assareh, Parisa Kazemiani-Najafabadi, Ehsan Amiri Rad, Ahmad Arabkoohsar
Summary: Waste heat recovery is effective for achieving higher supply efficiency, reduced energy consumption, and lower carbon footprint. This research proposes and optimizes a waste heat-driven combined cycle system for simultaneous cooling, heating, and power supply. Through analysis and optimization, the system demonstrates an exergy efficiency of 54.16% with a total cost of $23458.07/year.
Review
Thermodynamics
Mohammad Kiani-Moghaddam, Mohsen N. Soltani, Soteris A. Kalogirou, Omid Mahian, Ahmad Arabkoohsar
Summary: The concept of the energy hub (EH) is promising for evaluating multi-carrier integrated energy systems (IESs) at various scales. Existing literature on multi-carrier EH-based IESs has matured adequately for broad scales, but there is confusion and lack of clarity for limited-scale EH-based IESs. Additionally, complex studies involving uncertainties in decision-making variables, objective functions, and parameters require careful consideration for realistic conditions and effective optimization. This review paper aims to address these gaps by identifying and analyzing uncertain input parameters, proposing solution approaches, and discussing future research trends in multi-carrier EH-based IESs studies.
Article
Engineering, Environmental
Navid Moghaddas-Zadeh, Mahmood Farzaneh-Gord, Amir Ebrahimi-Moghadam, William P. Bahnfleth
Summary: This study suggests a novel heat pump system that utilizes turbo-expanders to recover energy from high-pressure natural gas, in order to provide part of the heat demand for a natural gas city gate station. The system is evaluated in terms of energy, exergy, and economics, showing advantages in fuel savings, exergy efficiency, and economic feasibility.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Construction & Building Technology
Navid Moghaddas-Zadeh, Mahmood Farzaneh-Gord, Amir Ebrahimi-Moghadam, William P. Bahnfleth
Summary: This study presents a general procedure for designing a chiller network that adapts to an arbitrary annual cooling demand distribution. The procedure utilizes the particle swarm optimization algorithm to find the optimal chiller loading distribution and selects the best configuration through a life cycle cost analysis. The results show significant reductions in energy consumption and life cycle costs compared to the conventional configuration under the baseline strategy.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Computer Science, Interdisciplinary Applications
Carina L. Gargalo, Haoshui Yu, Nikolaus Vollmer, Ahmad Arabkoohsar, Krist Gernaey, Guerkan Sin
Summary: With the increasing concern for climate change, renewable and sustainable energy production has attracted considerable attention. Life cycle assessment (LCA) is an effective tool for comparing environmental impacts. However, there are differences in the choice of LCA methods, detail sharing, and sensitivity analysis among different studies, making it difficult to compare results.
COMPUTERS & CHEMICAL ENGINEERING
(2024)
Article
Green & Sustainable Science & Technology
Seyed Mojtaba Alirahmi, Truls Gundersen, Ahmad Arabkoohsar, Jirf Jaromfr Klemes, Gurkan Sin, Haoshui Yu
Summary: This study proposes a complex energy storage/conversion system integrating various technologies to generate electricity, cooling, and water. The system aims to reduce CO2 emissions and address grid issues caused by intermittent renewables. The results show high efficiency and low cost for the proposed system, analyzed using a multi-objective optimization algorithm.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2024)
Article
Construction & Building Technology
Brenda V. F. Silva, Jens Bo Holm-Nielsen, Sasan Sadrizadeh, Mavd P. R. Teles, Mohammad Kiani-Moghaddam, Ahmad Arabkoohsar
Summary: This paper comprehensively reviews the importance of building energy consumption and greenhouse gas emissions worldwide, with a specific focus on energy efficiency and comfort in healthcare buildings. It analyzes both passive and active measures for energy savings, emphasizing the critical role of user behavior. It also provides design and retrofitting recommendations for healthcare buildings and addresses the lack of research on small-scale healthcare buildings.
SUSTAINABLE CITIES AND SOCIETY
(2024)
Article
Thermodynamics
Yong Cheng, Fukai Song, Lei Fu, Saishuai Dai, Zhiming Yuan, Atilla Incecik
Summary: This paper investigates the accessibility of wave energy absorption by a dual-pontoon floating breakwater integrated with hybrid-type wave energy converters (WECs) and proposes a hydraulic-pneumatic complementary energy extraction method. The performance of the system is validated through experiments and comparative analysis.
Article
Thermodynamics
Jing Gao, Chao Wang, Zhanwu Wang, Jin Lin, Runkai Zhang, Xin Wu, Guangyin Xu, Zhenfeng Wang
Summary: This study aims to establish a new integrated method for biomass cogeneration project site selection, with a focus on the application of the model in Henan Province. By integrating Geographic Information System and Multiple Criterion Decision Making methods, the study conducts site selection in two stages, providing a theoretical reference for the construction of biomass cogeneration projects.
Article
Thermodynamics
Mert Temiz, Ibrahim Dincer
Summary: The current study presents a hybrid small modular nuclear reactor and solar-based system for sustainable communities, integrating floating and bifacial photovoltaic arrays with a small modular reactor. The system efficiently generates power, hydrogen, ammonia, freshwater, and heat for residential, agricultural, and aquaculture facilities. Thermodynamic analysis shows high energy and exergy efficiencies, as well as large-scale ammonia production meeting the needs of metropolitan areas. The hybridization of nuclear and solar technologies offers advantages of reliability, environmental friendliness, and cost efficiency compared to renewable-alone and fossil-based systems.
Editorial Material
Thermodynamics
Wojciech Stanek, Wojciech Adamczyk
Article
Thermodynamics
Desheng Xu, Yanfeng Li, Tianmei Du, Hua Zhong, Youbo Huang, Lei Li, Xiangling Duanmu
Summary: This study investigates the optimization of hybrid mechanical-natural ventilation for smoke control in complex metro stations. The results show that atrium fires are more significantly impacted by outdoor temperature variations compared to concourse/platform fires. The gathered high-temperature smoke inside the atrium can reach up to 900 K under a 5 MW train fire energy release. The findings provide crucial engineering insights into integrating weather data and adaptable ventilation protocols for smoke prevention/mitigation.
Article
Thermodynamics
Da Guo, Heping Xie, Mingzhong Gao, Jianan Li, Zhiqiang He, Ling Chen, Cong Li, Le Zhao, Dingming Wang, Yiwei Zhang, Xin Fang, Guikang Liu, Zhongya Zhou, Lin Dai
Summary: This study proposes a new in-situ pressure-preserved coring tool and elaborates its pressure-preserving mechanism. The experimental and field test results demonstrate that this tool has a high pressure-preservation capability and can maintain a stable pressure in deep wells. This study provides a theoretical framework and design standards for the development of similar technologies.
Article
Thermodynamics
Aolin Lai, Qunwei Wang
Summary: This study assesses the impact of China's de-capacity policy on renewable energy development efficiency (REDE) using the Global-MSBM model and the difference-in-differences method. The findings indicate that the policy significantly enhances REDE, promoting technological advancements and marketization. Moreover, regions with stricter environmental regulations experience a higher impact.
Article
Thermodynamics
Mostafa Ghasemi, Hegazy Rezk
Summary: This study utilizes fuzzy modeling and optimization to enhance the performance of microbial fuel cells (MFCs). By simulating and analyzing experimental data sets, the ideal parameter values for increasing power density, COD elimination, and coulombic efficiency were determined. The results demonstrate that the fuzzy model and optimization methods can significantly improve the performance of MFCs.
Article
Thermodynamics
Zhang Ruan, Lianzhong Huang, Kai Wang, Ranqi Ma, Zhongyi Wang, Rui Zhang, Haoyang Zhao, Cong Wang
Summary: This paper proposes a grey box model for fuel consumption prediction of wing-diesel hybrid vessels based on feature construction. By using both parallel and series grey box modeling methods and six machine learning algorithms, twelve combinations of prediction models are established. A feature construction method based on the aerodynamic performance of the wing and the energy relationship of the hybrid system is introduced. The best combination is obtained by considering the root mean square error, and it shows improved accuracy compared to the white box model. The proposed grey box model can accurately predict the daily fuel consumption of wing-diesel hybrid vessels, contributing to operational optimization and the greenization and decarbonization of the shipping industry.
Article
Thermodynamics
Huayi Chang, Nico Heerink, Junbiao Zhang, Ke He
Summary: This study examines the interaction between off-farm employment decisions between couples and household clean energy consumption in rural China, and finds that two-paycheck households are more likely to consume clean energy. The off-farm employment of women is a key factor driving household clean energy consumption to a higher level, with wage-employed wives having a stronger influence on these decisions than self-employed ones.
Article
Thermodynamics
Hanguan Wen, Xiufeng Liu, Ming Yang, Bo Lei, Xu Cheng, Zhe Chen
Summary: Demand-side management is crucial to smart energy systems. This paper proposes a data-driven approach to understand the relationship between energy consumption patterns and household characteristics for better DSM services. The proposed method uses a clustering algorithm to generate optimal customer groups for DSM and a deep learning model for training. The model can predict the possibility of DSM membership for a given household. The results demonstrate the usefulness of weekly energy consumption data and household socio-demographic information for distinguishing consumer groups and the potential for targeted DSM strategies.
Article
Thermodynamics
Xinglan Hou, Xiuping Zhong, Shuaishuai Nie, Yafei Wang, Guigang Tu, Yingrui Ma, Kunyan Liu, Chen Chen
Summary: This study explores the feasibility of utilizing a multi-level horizontal branch well heat recovery system in the Qiabuqia geothermal field. The research systematically investigates the effects of various engineering parameters on production temperature, establishes mathematical models to describe their relationships, and evaluates the economic viability of the system. The findings demonstrate the significant economic feasibility of the multi-level branch well system.
Article
Thermodynamics
Longxin Zhang, Songtao Wang, Site Hu
Summary: This investigation reveals the influence of tip leakage flow on the modern transonic rotor and finds that the increase of tip clearance size leads to a decline in rotor performance. However, an optimal tip clearance size can extend the rotor's stall margin.
Article
Thermodynamics
Kristian Gjoka, Behzad Rismanchi, Robert H. Crawford
Summary: This paper proposes a framework for assessing the performance of 5GDHC systems and demonstrates it through a case study in a university campus in Melbourne, Australia. The results show that 5GDHC systems are a cost-effective and environmentally viable solution in mild climates, and their successful implementation in Australia can create new market opportunities and potential adoption in other countries with similar climatic conditions.
Article
Thermodynamics
Jianwei Li, Guotai Wang, Panpan Yang, Yongshuang Wen, Leian Zhang, Rujun Song, Chengwei Hou
Summary: This study proposes an orientation-adaptive electromagnetic energy harvester by introducing a rotatable bluff body, which allows for self-regulation to cater for changing wind flow direction. Experimental results show that the output power of the energy harvester can be greatly enhanced with increased rotatory inertia of the rotating bluff body, providing a promising solution for harnessing wind-induced vibration energy.
