Energy Science & Engineering最新文献

{"title":"Numerical and Experimental Investigation of Gas Turbine Rotor for Early Fault Detection","authors":"Muhammad Akhtar,&nbsp;Waqar Muhammad Ashraf,&nbsp;Nasir Hayat,&nbsp;Ghulam Moeen Uddin,&nbsp;Fahid Riaz","doi":"10.1002/ese3.70054","DOIUrl":"https://doi.org/10.1002/ese3.70054","url":null,"abstract":"<p>Rotodynamic analysis is a key analysis for turbomachinery for investigating the health and integrity of equipment. Most of the analyses are performed at the design stage, while the actual machine behavior is different due to imperfections like unbalance, misalignment, cracks, and so forth. In this paper, a representative CAD model of a gas turbine rotor is developed to get the actual rotodynamic response of a rotor. Vibration data of the rotor is compared with that of the developed numerical model. The reference model representation of the actual machine in terms of critical speed and vibration value is found to be 99.7% and 99.1%, respectively. Rotodynamic analyses of numerical models are performed for early identification of faults under various scenarios of unbalance, crack, and crack with unbalance. For these scenarios, modal analysis and harmonic analysis are performed. Natural frequencies and vibration behavior are utilized to capture the variation that indicates the presence of a fault. This way, early identification of faults is made to save the machine from damage. Within the unbalance range of <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 \u0000 <mrow>\u0000 <msup>\u0000 <mrow>\u0000 <mn>1.0</mn>\u0000 \u0000 <mo>×</mo>\u0000 \u0000 <mn>10</mn>\u0000 </mrow>\u0000 \u0000 <mrow>\u0000 <mo>−</mo>\u0000 \u0000 <mn>9</mn>\u0000 </mrow>\u0000 </msup>\u0000 </mrow>\u0000 </mrow>\u0000 </semantics></math> to 0.5 kg, a direct relation between change in unbalance mass and vibration amplitude is observed in the case of unbalance and unbalance with crack. Similarly, for cracks (of 1–3 mm thickness and depth up to 372 mm), a shift in maximum vibration amplitude frequency to first critical speed from second critical speed is noted. Hilbert transform is utilized to track the nonlinearity especially up to an operating speed of 3000 rpm (50 Hz). These key outcomes can be used to reduce rotary machine downtime by not only highlighting the problem at a very early stage but also swiftly identifying its root cause for the smooth working of rotary equipment in the industry.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"13 5","pages":"2546-2564"},"PeriodicalIF":3.5,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70054","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical Simulation of Deep Coalbed Methane Development Based on Embedded Discrete Fracture Model: A Triple Medium Flow Approach","authors":"Yongsheng An,&nbsp;Zhongwen Sun,&nbsp;Jin Wang,&nbsp;Xiaoyu Zhang,&nbsp;Yangfeng Sun","doi":"10.1002/ese3.70085","DOIUrl":"https://doi.org/10.1002/ese3.70085","url":null,"abstract":"<p>China is rich in coalbed methane resources, especially with significant potential for deep coalbed methane development. As shallow coalbed methane resources gradually deplete, the development of deep coalbed methane has become a research focus. Due to the low permeability and micro-scale migration characteristics of deep coalbed methane, its exploitation requires different approaches compared to shallow coalbed methane. This paper, based on the embedded discrete fracture numerical simulation technology used for shale gas, considering the shrinkage effect of coal matrix, establishes a triple-medium flow model comprising cleats, natural fractures, and artificial fractures to simulate the deep coalbed methane extraction process. When compared with traditional numerical simulation methods using real well data, the new model improves accuracy by 8.08%. The sensitivity analysis of engineering parameters and geological parameters in the development of deep coalbed methane reveals that the gas content coal seams are the main factors affecting gas production. To obtain high-yield gas wells, it is necessary to create a complex hydraulic pressure fracture network in high gas content layers. This study provides a new numerical simulation model for deep coalbed methane development. The model couples cleats, natural fracture networks, and fractures, and accurately represents the geological characteristics of deep coalbed methane reservoirs. Additionally, this study provides theoretical support for improving the production of deep coalbed methane through one-factor sensitivity analysis.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"13 6","pages":"3045-3062"},"PeriodicalIF":3.5,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70085","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Risk-Based Expansion Planning of Regional Energy Networks","authors":"Mohammad DehghaniSanij,&nbsp;Ahmad Mirzaei,&nbsp;Amjad Anvari-Moghaddam","doi":"10.1002/ese3.70079","DOIUrl":"https://doi.org/10.1002/ese3.70079","url":null,"abstract":"<p>Reliable power supply provision for customers is very important for electrical energy providers. The emergence of regional energy networks (RENs), and electricity market developments add to the above challenges. RENs consist of natural gas and electricity as inputs and energy storage systems (ESSs), combined heat and power (CHP) systems, thermal energy storages (TESs), boilers, photovoltaics (PVs) and wind turbines (WTs) as resources. In this paper, a risk-based expansion planning model is developed for RENs considering operation and investment costs. PVs and WTs power generation, demand response (DR), and failures of tie switches between REN and distribution networks are defined as RENs operation uncertainties. Reliability index is formulated and Probability-Tree tool is used for scenario generation. The mentioned optimization problem is solved using a genetic algorithm (GA). We use 25-Bus IEEE standard distribution network to verify the efficiency and performance of the proposed model. Two RENs are connected to the test system and simulation results are obtained for two case studies. Simulation results show that if the probability of failure of tie switches is considered, the investment and operation costs of RENs are increased by about 92% in the planning horizon.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"13 6","pages":"2960-2972"},"PeriodicalIF":3.5,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70079","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Cuttings Transport in Small-Bore Horizontal Wells Considering Drill String Eccentricity","authors":"An Jintao,&nbsp;Li Jun,&nbsp;Honglin Huang,&nbsp;Hui Zhang,&nbsp;Hongwei Yang,&nbsp;Geng Zhang,&nbsp;Sainan Chen,&nbsp;Qiuxia Lai","doi":"10.1002/ese3.70088","DOIUrl":"https://doi.org/10.1002/ese3.70088","url":null,"abstract":"<p>The narrow annulus in small-bore horizontal wells causes marked differences in cuttings transport compared to conventional horizontal wells. To address this issue, a CFD-based numerical model for solid-liquid two-phase flow in the annulus was developed, accounting for the eccentricity of the drill string. The study examines the effects of key factors, including flow rate, drill pipe rotation speed, well inclination angle, and drilling fluid properties, on cuttings transport in small-bore horizontal wells. Results show that increasing drill pipe rotation speed enhances tangential and axial velocities of the annular fluid by up to 25%, expanding the “viscous coupling” region. This facilitates the upward movement of cuttings from the lower to the upper side of the annulus, improving cuttings transport. Increasing drilling fluid density enhances cuttings buoyancy, reducing their deposition by 43%. A “critical rotation speed” and “critical flow rate” exist, below which cuttings transport is most difficult in highly inclined sections and above which transport is most challenging in horizontal sections. Increasing drilling fluid density enhances cuttings buoyancy, reducing their deposition. The effect of rheological parameters on hole cleaning efficiency exhibits a nonlinear trend, with an optimal range of these parameters existing under varying flow rates and drill pipe rotation speeds. These findings offer guidance for optimizing hydraulic parameters in small-bore horizontal wells and preventing stuck pipe incidents.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"13 6","pages":"3088-3106"},"PeriodicalIF":3.5,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70088","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"2024, A Landmark Year for Climate Change and Global Carbon Capture, Utilization, and Storage: Annual Progress Review","authors":"Shangli Shi,&nbsp;Yun Hang Hu","doi":"10.1002/ese3.70091","DOIUrl":"https://doi.org/10.1002/ese3.70091","url":null,"abstract":"<p>This annual review outlines the progress of carbon capture, utilization, and storage (CCUS) technologies in 2024. As human-induced CO₂ emissions continued to rise, the year presented critical challenges. Notably, 2024 was the hottest year on record and the first in which global temperatures exceeded preindustrial levels by more than 1.5°C, driving intensified efforts to advance CCUS. Scientific interest in CCUS grew significantly, with the annual number of related publications increasing by 11.4% compared to 2023, reaching 53,970. The total number of operational commercial CCUS facilities also expanded, rising by 16.3% to a total of 50. In the political area, governments introduced targeted policies to accelerate CCUS adoption, focusing on economic investment and specific implementation requirements.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"13 6","pages":"3448-3458"},"PeriodicalIF":3.5,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70091","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Low-Temperature Torrefaction Pretreatment on the Energy–Mass Co-Benefit of Corn Straws","authors":"Yantao Yang,&nbsp;Lei Song,&nbsp;Mei Yang,&nbsp;Peng Liu,&nbsp;Tingzhou Lei","doi":"10.1002/ese3.70068","DOIUrl":"https://doi.org/10.1002/ese3.70068","url":null,"abstract":"<p>To explore the effects of low-temperature torrefaction on physicochemical properties and energy–mass co-benefit of corn straws, the products obtained after torrefaction at different low temperatures were studied. Through proximate analysis, ultimate analysis, scanning electron microscopy, and higher calorific value, the effects of different low-temperature torrefaction on physicochemical properties of corn straws and energy–mass co-benefit were studied. The results showed as follows: After low-temperature torrefaction pretreatment, with the decrease of volatile matter, the H/C ratio decreased by 21.59%, the O/C ratio decreased by 19.05%, and the higher calorific value increased by 14.78% from 19.42 to 22.29 MJ·kg⁻¹. Therefore, low-temperature torrefaction pretreatment can promote the volatilization of light components in corn straws, significantly increase the fixed carbon content, and then improve the mass density and energy quality into high-grade fuels. The improvement of mass density is convenient for storage and transportation, and the improvement of energy–mass is convenient for improving the calorific value of combustion.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"13 6","pages":"2802-2809"},"PeriodicalIF":3.5,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70068","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial Reconstruction of Pore-Crack Microstructure and Its Topological Configuration Relationship With Connectivity and Pore-Scale Flow in Coal by 3D-XRM","authors":"Congmeng Hao,&nbsp;Haoyu Zhang,&nbsp;Xuepeng Zhang,&nbsp;Ruxiang Ma,&nbsp;Kaizhong Zhang,&nbsp;Xiangqian Xing","doi":"10.1002/ese3.70084","DOIUrl":"https://doi.org/10.1002/ese3.70084","url":null,"abstract":"<p>In consideration of the significance of connectivity features and topological relationships within the pore-crack network, the micro-scale pore-crack microstructure of intact and tectonic coals from Qinan was investigated in 3D spatial visualization using digital core technology. The results indicate that the roughly vertical distribution in intact coal microstructure regularly divides the coal matrix into several cubic blocks. Tectonism is responsible for the fundamental transformation of the microstructure, causing tectonic coals to exhibit more sporadically distributed microcracks and pore clusters. The topological sphere and stick model based on skeletonization and its quantitative connectivity parameters show that the throat lengths of Qinan coals are mainly 0–150 μm, with tectonic coals having fewer throats over 100 μm. Pore diameters in intact coals are mostly under 30 μm, while tectonic coals exceed 20 μm. Compared with intact coals, pore spaces under 2000 μm³ in tectonic coals increased from 61.38% to 71.13%, surface area increased from 69.98% to 77.76%, and coordination number also increased significantly. These quantitative parameters collectively indicate that tectonic factors promoted the formation of more minute-scale pore spaces and significantly enhanced the connectivity between pore spaces and throats. On this basis, the pore-scale flow simulations were carried out from the equivalent pore network model, indicating that the pressure distribution of tectonic coals in different directions could be more concentrated and uniform than intact coals with lower fluid pressure values, revealing the promotion of tectonic effects on pore-scale fluid transport.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"13 6","pages":"3031-3044"},"PeriodicalIF":3.5,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70084","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optical Study and Numerical Simulation of the Effect of n-butanol Mass on the Combustion Process of a n-butanol/Diesel Dual-Fuel Engine","authors":"Wei Mingrui,&nbsp;Zhou Qian,&nbsp;Liu Jinping","doi":"10.1002/ese3.70061","DOIUrl":"https://doi.org/10.1002/ese3.70061","url":null,"abstract":"<p><i>n</i>-butanol, with its higher calorific value compared to methanol and ethanol, is well-suited for diesel engine combustion. This study investigates the impact of <i>n</i>-butanol addition on the combustion process in a <i>n</i>-butanol/diesel dual-fuel engine using both experimental and numerical approaches. Experiments were conducted on a modified optical engine equipped with two injectors: one for <i>n</i>-butanol injection in the intake and another for two-stage diesel injection directly into the cylinder. The study varied the <i>n</i>-butanol mass (5, 10, 15, and 20 mg) while maintaining a constant diesel mass. High-speed photography combined with a two-color method was employed to capture flame propagation and carbon smoke generation. Numerical simulations using three-dimensional software further analyzed the effects of <i>n</i>-butanol mass on injection, combustion, and emission characteristics, including cylinder pressure, temperature, heat release rate (HRR), and emissions (NO_X, CO, and HCHC). The results revealed that flame clusters formed in the cylinder center and along the cylinder wall. Increasing <i>n</i>-butanol mass significantly extended ignition delay and reduced combustion duration. The high latent heat of vaporization (LHV) and low cetane number of <i>n</i>-butanol suppressed the initial exothermic rate, while diesel auto-ignition triggered high-temperature reactions in the pre-mixed <i>n</i>-butanol, enhancing dual-fuel combustion exothermicity. This led to gradual increases in cylinder pressure and HRR. Emission analysis showed that <i>n</i>-butanol introduction increased OH and HO₂ radical concentrations, alongside elevated NO_X and CO levels. These findings provide insights into optimizing <i>n</i>-butanol/diesel dual-fuel combustion for improved performance and emissions control.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"13 6","pages":"2695-2706"},"PeriodicalIF":3.5,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70061","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance Evaluation of Self-Degradable Gel Temporary Plugging Agents for Pressurized Workover","authors":"Deji Liu,&nbsp;Chao Chen,&nbsp;Xiaohui Li,&nbsp;Ying Wang,&nbsp;Li Cheng,&nbsp;Shoumin Sun,&nbsp;Jiayi Tan","doi":"10.1002/ese3.2031","DOIUrl":"https://doi.org/10.1002/ese3.2031","url":null,"abstract":"<p>Band pressure operation has become the main way of oil and gas well workover in the world, to solve the gel breaking problem in the gel plugging pressure technology, acrylamide and ester-based cross-linking agent UCL-1 were used to synthesize a self-degradable gel that can be used at 40°C–60°C by the one-pot method. The cross-linking reaction principle of the gel was analyzed by infrared spectroscopy; in addition, the degradation performance of the gel and the effects of acrylamide, UCL-1, initiator and metal ions on the degradation performance of the gel as well as the influence law were investigated; finally, sand-filled tubing and casing were used to simulate the stratigraphy and the wellbore, respectively, thus evaluating the sealing performance of the gel. The results showed that the cross-linking reaction of the gel was a double-bond copolymerization reaction; the viscosity of the gel after complete degradation in the range of 40°C–60°C was 51–450 mPa-s, and the degradation time was 115–220 h, and the degradation time of the gel could be adjusted by changing the formulation components and the mineralization degree; moreover, the pressure-bearing capacity of the gel in the formation at 40°C–60°C was 8.5–14.9 MPa, and the pressure-bearing capacity of gel in wellbore is 52–73 kPa, and the blocking time is 3–6 d, which meets the construction time requirement of pressurized operation. This study extends the breaking method of gel plugging pressure technology and further promotes the development and application of pressure work technology.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"13 4","pages":"1555-1566"},"PeriodicalIF":3.5,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.2031","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143852732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mod Tanh-Activated Physical Neural Network MPPT Control Algorithm for Varying Irradiance Conditions","authors":"Khuong Nguyen-Vinh,&nbsp;Surender Rangaraju,&nbsp;Michal Jasinski","doi":"10.1002/ese3.70062","DOIUrl":"https://doi.org/10.1002/ese3.70062","url":null,"abstract":"<p>The increasing adoption of solar photovoltaic systems necessitates efficient maximum power point tracking (MPPT) algorithms to ensure optimal performance. This study proposes a Mod tanh-activated physical neural network (MAPNN)-based MPPT control algorithm, which addresses inefficiencies in existing models caused by spectral mismatch and improper converter control. The proposed method incorporates beta-distributed point estimation technique for mismatch factor correction and a Buck-Boost converter with a feedback control using the Chinese Remainder Theorem – Puzzle Optimization Algorithm-tuned PID controller. Simulations demonstrate an efficiency improvement of 98.42%, with a 4.54 dB reduction in total harmonic distortion and faster convergence compared to traditional methods such as ANN and LSTM. This system significantly enhances MPPT performance under dynamic irradiance conditions.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"13 6","pages":"2606-2619"},"PeriodicalIF":3.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70062","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}