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Research Progress on Film Cooling Fed by Crossflow Ribbed Passage of Gas Turbine Blades AI Introduction
Abstract：ObjectivesThe inlet temperature of gas turbine has far exceeded the allowable temperature of the blade material, so it is very important to develop more efficient turbine cooling technology, especially the film cooling technology. The film cooling in the central region of the turbine blade is usually supplied by the crossflow ribbed passage. Therefore, the research progress of the film cooling in the crossflow ribbed passage in recent years was reviewed.MethodsThe variations in film cooling performance under different coolant supply modes were introduced. The impacts of rib angle, rib shape, relative position of film holes and ribs, and Reynolds number at the inlet of the crossflow channel on flow and film cooling performance were summarized. The research progress of film cooling hole shape design under the condition of crossflow ribbed cooling air was concluded.ResultsThe internal cooling structures within the crossflow ribbed passage and the Reynolds number at the entrance of the crossflow channel exert significant influences on film cooling performance, while the distribution of cooling effectiveness at the hole outlet downstream is altered during crossflow intake. Moreover, the flow at the hole entrance is influenced by both the relative position of the hole and rib as well as changes in Reynolds number. The asymmetrical spanwise cooling hole and the hole insensitive to the crossflow can enhance the film cooling performance.ConclusionsIn order to further promote the development of film cooling technology in the crossflow ribbed passage, it is recommended to thoroughly study the relationship between film cooling performance and all influencing factors, and to optimize the design of special film cooling hole suitable for crossflow ribbed inlet.Keywords：gas turbine;film cooling;turbine cooling;ribbed passage;turbine blade;rib;blade cooling;cooling efficiency105|325|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15Research Status and Development Trend of Rotating Internal Cooling Channel in Gas Turbine Blade AI Introduction
Abstract：ObjectivesThe high-efficiency internal cooling technology of turbine blade is crucial for improving the thermal efficiency of gas turbine. As an important component of the gas turbine, it is essential to conduct research on the cooling performance of rotor blade. Due to significant effect of Coriolis force, buoyancy force, and channel structure on the cooling performance of rotating internal channel of turbine blade, this paper summarized the research status and development trends of rotating internal cooling channel based on these effect factors.MethodsA new structural design of rotating internal cooling channels was introduced, and a new rotating internal cooling channel structure suitable for double-walled blade configurations was proposed.ConclusionsDouble-sided enhanced U-shaped channels can utilize the enhanced heat transfer effect of Coriolis force, resulting in better cooling performance than traditional rotating U-shaped channels. There is a broad room for improvement in the internal cooling of gas turbine rotor blades.Keywords：gas turbine;turbine blade;internal cooling;rotating;Coriolis force146|166|1<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15- Abstract：ObjectivesThe effectiveness of cooling technology directly influences the performance and lifespan of gas turbine blades operating in high-temperature, and high-pressure environments. The research status of swirl cooling technology was reviewed, aiming to summarize and evaluate its application in enhancing cooling efficiency and reducing thermal stress, and systematically analyze the basic principle and performance of swirl cooling technology.MethodsThe review focused on the design of swirl cooling channels, the combined use of swirl and film cooling, and the impact of rotational conditions on heat transfer performance.ResultsThe swirl cooling technology significantly improves blade cooling efficiency and reduces thermal stress concentration. Specifically, reasonable design of swirl cooling channel can achieve uniform distribution of cooling fluid, enhance the cooling effect and prolong the service life of the blade.ConclusionsThe application of swirl cooling technology in gas turbine blade cooling has broad prospects. Future research should continue to explore the optimized design of swirl cooling technology and its performance under various operating conditions. Additionally, the combination with advanced manufacturing technologies, such as additive manufacturing, can further enhance the design complexity and cooling efficiency of swirl cooling channels, providing reliable support for the efficient and stable operation of gas turbines.Keywords：gas turbine;turbine blades;swirl cooling;film cooling;impingement cooling121|484|1<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15
Analysis of Application Status and Key Issues of Hydrogen Blending Power Generation Technology for H-class Gas Turbine AI Introduction
Abstract：ObjectivesAs an important support for the new power system, hydrogen gas turbines can help reduce carbon emissions and are conducive to grid peak regulation. They are the focus of technological innovation in the global future strategic emerging industries. Many key issues faced by hydrogen blending gas turbine power generation technology from demonstration to commercialization, need to be solved.MethodsH-class gas turbines were taken as the research object, and the strategic planning and demonstration projects of hydrogen blending gas turbine power generation in China and abroad were introduced, and the technology routes of H-class gas turbines of major gas turbine manufacturers were compared. The analysis and suggestion was made from four aspects for the scale application of future hydrogen blending gas turbine power generation technology, including hydrogen source, system transformation, emission impact and hydrogen blending power generation cost.ResultsRenewable energy electrolysis of water to produce hydrogen will be the main source of hydrogen blending gas turbine power generation. In addition, the development of new dry low nitrogen oxide burners, which are suitable for unstable combustion of hydrogen blending, will be the key direction for future hydrogen blending gas turbine system transformation. The higher the hydrogen volume percentage is, the greater the CO2 emission reduction is. However, the NOx emission is on an upward trend. Moreover, there is a risk of exceeding the standard value, and the future cost of hydrogen blending gas turbine power generation can reach the same level as the cost of natural gas power generation.ConclusionsWith the reduction of the cost of large-scale renewable energy hydrogen production, and the implementation of carbon tax and the maturity of hydrogen blending power generation technology, the gas turbine hydrogen blending power generation will gradually enter large-scale application.Keywords：hydrogen energy;H-class gas turbine;hydrogen blending power generation;hydrogen volume percentage;pure hydrogen;CO2;NOx124|623|2<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15- Abstract：ObjectivesIn order to obtain the refined leakage flow of brush seal and reveal its sealing mechanism, the mathematical model of the leakage flow characteristics of brush seals based on the bristle pack staggered tube bundle model was established.MethodsThe leakage flow rate and characteristics inside the bristle pack of brush seal were investigated by numerical solution of Reynolds-averaged Navier-Stokes (RANS) and shear stress transport (SST) k-ω turbulence model. The leakage and pressure distribution obtained by numerical simulation agrees well with the experimental data, which verifies the reliability of the numerical method. The leakage flow rate and characteristics inside the bristle pack of brush seal was analyzed at four kinds of pressure ratios and rotational speeds.ResultsWith the increase of pressure ratio, tiny vortex begins to appear inside the bristle pack and gradually develops. The obstruction effect on the leakage flow becomes larger, which slows down the trend of leakage increment with the pressure ratio. In addition, the pressure drop of the last row of bristle accounting for the overall pressure differential increases from 13.1% to 26.3%.ConclusionsIn the studied range of rotational speed, the influence of rotational speed on the leakage of brush seal can be ignored. When the pressure ratio is different, the difference in the radial flow strength of the leakage flow in the gap between the last row of bristle and the backing plate and the axial flow strength at the fence height will lead to the difference in the vortex system structure under the backing plate. The sealing mechanism of the brush seal was revealed using the refined leakage flow inside the bristle pack. The research results can provide reference for the leakage flow analysis of brush seal using three-dimensional staggered tube bundle model.Keywords：turbomachinery;brush seal;bristle pack;staggered tube bundle model;leakage flow;sealing mechanism38|100|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15
Optimization and Evaluation of Cooling Structure of Stage 1 Blade of Heavy-Duty Gas Turbine AI Introduction
Abstract：ObjectivesThe localization of core components of heavy-duty gas turbines holds significant importance for technological innovation, industrial upgrading, and even national security. As a typical hot-end component of heavy-duty gas turbines, the performance of the turbine first-stage rotor blade directly determines the efficiency and reliability of the gas turbine. Therefore, the structure of the first-stage turbine blades of a certain heavy-duty gas turbine was optimized.MethodsBy increasing the number of bamboo nodes in the blade body, the blade cooling hole structure was optimized, and the thermal barrier coating was used to improve the blade coating. The temperature, stress distribution and aerodynamic efficiency of the blades before and after optimization under the service condition of the blade were compared and analyzed by fluid calculation and finite element calculation.ResultsHeat transfer efficiency inside the blade is enhanced by optimization of turbulent structure. Under the condition of the same inlet pressure of the cooling air, the surface temperature of the optimized blade is reduced by more than 50 ℃. Since the shape of the blade is not changed, there is little influence on the aerodynamic efficiency. Compared with the blades without optimization, the maximum equivalent stress and equivalent total strain of the optimized blade during service are significantly reduced.ConclusionsBy optimizing the cooling structure and upgrading the protective coatings, the reliability of the blades in high-temperature can be significantly improved. The research results provide a theoretical basis for the localization of gas turbines.Keywords：gas turbine;turbine blade;structure optimization;coating improvement;cooling hole;fluid calculation;finite element calculation557|512|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15SGT5-4000F Gas Turbine Improvement and Upgrade Measures Analysis AI Introduction
Abstract：ObjectivesIn order to provide technical reference and design basis for the research and subsequent upgrade of China’s independent heavy-duty gas turbine, a series of upgrade measures of SGT5-4000F gas turbine were analyzed.MethodsThrough the collection, organization and performance analysis of relevant literature and data on the SGT5-4000F gas turbine, a series of upgrade measures taken by Siemens to improve the performance of the gas turbine have been summarized since it was introduced to the market in 1996.ResultsThrough the analysis, it can be concluded that Siemens’ upgrade measures include: increasing compressor mass flow, reducing the cooling air and adopting HCO to improve the power and thermal efficiency. The use of premixed pilot and optimization of the main swirler helps to improve the thermo-acoustic stability and reduce NOx emission. The validated new materials and new casting technologies can be used to improve the durability, life and operational flexibility.ConclusionsThe above technical upgrade measures can be used as technical reference and design basis for future improvement and upgrade of China’s independent heavy-duty gas turbine and its derivative models.Keywords：heavy-duty gas turbine;SGT5-4000F;improvement;upgrade;technical validation83|168|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15Impact of Falling Blocks of High Pressure Turbine Rotor Blades With Squealer Tip on the Aerodynamic Performance and Vibration Characteristics AI Introduction
Abstract：ObjectivesThe operating state under the condition of high-pressure turbine damage will have a certain impact on the performance and vibration of the gas turbine. At present, the means to accurately assess whether the whole machine can continue to be in service was relatively lacking. Therefore, the research on the influence of the tip groove wear and block shedding of the high-pressure turbine rotor blade on the aerodynamic performance and vibration deformation had been carried out.MethodsUsing the three-dimensional numerical simulation method, based on the original tip groove structure of the blade, the influence of five different tip groove damage shapes on typical aerodynamic performance and vibration characteristics of the high pressure turbine was simulated and analyzed.ResultsThe damage of the blade tip groove on the pressure side with falling block, suction side with falling block, trailing edge with falling block, pressure side and trailing edge with falling blocks simultaneous, or pressure side, suction side and trailing edge with falling blocks simultaneous of rotor blades cause an efficiency decrease of 0.44%, 1.6%, 0.03%, 0.67%, and 3.2%, respectively. Different blade squealer tip shapes have a smaller impact on the vibration deformation of the rotor blade, while trailing edge with falling block reduces the deformation of the rotor blade.ConclusionsBased on the analysis results of comprehensive performance and vibration, rotor blades with falling blocks at pressure side, trailing edge, or both can continue to be used. However, it is not recommended to use rotor blades with falling blocks at suction side or pressure side, suction side and trailing edge.Keywords：gas turbine;high pressure turbine;leakage flow;numerical simulation;rotor tip;vibration response73|279|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15- Abstract：ObjectivesWith the implementation of the national “Dual Carbon Strategy” (carbon peak and carbon neutrality), it is anticipated that the existing coating structures may not meet the requirements of future gas turbine thermal protection coatings. The concept of a new type of environmental/thermal barrier coating (E/TBC) structure with high temperature corrosion resistance has been proposed to meet the demand for thermal protection coatings in hybrid hydrogen combustion engines.MethodsThe development history and research status of thermal barrier coating (TBC), environmental barrier coating (EBC), thermal/environmental barrier coating (T/EBC) and thermal and environmental barrier coating (TEBC) were reviewed and analyzed from the perspective of thermal protection coating materials and coating structures. Moreover, the gap between the above coating structures and the requirementsof thermal protection coating for mixed hydrogen gas turbines was investigated.ResultsIt is reasonable to superimpose the function of EBC onto the thermal protection coating of current mixed hydrogen gas turbines, thereby forming a new type of E/TBC structure with high temperature corrosion resistance on the high-temperature alloy substrate.ConclusionsThrough the preliminary test, it is proved that the new E/TBC structure is suitable for the thermal protection coating requirements of mixed hydrogen gas turbine against high temperature water oxygen corrosion, and it is pointed out that the theory and application research of this new E/TBC thermal protection coating should be vigorously carried out.Keywords：gas turbine;hydrogen fuel;hydrogen doped gas turbines;thermal barrier coatings (TBC);corrosion prevention;structural design of coatings84|568|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15
Gas Turbine Power Generation Technology
- Abstract：ObjectivesNanofluid technology is an important means to improve the thermal conductivity of energy storage materials in solar thermal power plants. However, the nanoparticles in actual molten salt based nanofluid usually aggregate and settle down, which significantly affects the thermal performance of the composites. To gain a deeper insight into the variation of thermophysical properties of molten salt based nanofluids, the silica nanoparticles with different aggregation morphologies were constructed in solar salt.MethodsThe effects of system temperature, mass fraction of nanoparticles, and micromorphology of aggregates were investigated based on the molecular dynamics simulation and lattice Boltzmann method.ResultsIt is found that the inclusion of nanoparticles can effectively enhance the thermal conductivity of the base fluid. Compared with the uniformly dispersed nanofluid, the heat conduction performance of the aggregated nanofluid is better, and it decreases with the increase of fractal dimension of agglomerates. Moreover, the thermal conductivity of nanofluid is negatively correlated with temperature and aggregate size, and positively correlated with mass fraction of nanoparticles, backbone length of each aggregate and degree of agglomeration.ConclusionsThe research results reveal the mechanism of nanoparticle aggregation on the heat transport within phase change materials and provide critical reference on the design of thermophysical properties of molten salt based nanofluids.Keywords：solar thermal power generation;heat storage;nanofluids;molten salt;molecular dynamics;lattice Boltzmann method74|278|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15
Development Status and Prospect of Key Technologies for Liquid Hydrogen Production-Storage-Transportation-Refueling AI Introduction
Abstract：ObjectivesLiquid storage and transportation is one of the effective ways to realize large-scale and long-distance storage and transportation of hydrogen and ensure the large-scale application of hydrogen energy. At present, there is relatively little research on the preparation, storage, transportation, and refueling of liquid hydrogen in China. Therefore, the current development status analysis of key technologies in these fields was conducted.MethodsThe advantages and disadvantages of high pressure gaseous storage, liquid hydrogen storage and solid hydrogen storage technologies were compared. The main liquefaction methods, liquid hydrogen storage insulation technologies and key materials in the process of liquid hydrogen preparation were reviewed. The characteristics of different transportation modes and equipments of liquid hydrogen were analyzed. The construction of liquid hydrogen hydrogenation station was combed, and the liquid hydrogen filling technologies were compared. The main application fields and industrialization modes of liquid hydrogen were expounded, and a statistical analysis of the patent technologies of liquid hydrogen storage and transportation in China in recent years was carried.ResultsThe “neck-stuck” difficulties faced by the development of liquid hydrogen storage and transportation in China and the urgent need for technical research directions were proposed.ConclusionsThe results can provide reference for the key technology research and equipment development of liquid hydrogen.Keywords：hydrogen energy;liquid hydrogen;liquefaction preparation;liquid hydrogen storage and transportation;liquid hydrogen filling;storage tank149|842|5<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15
New Energy
Intelligent Construction System and Key Technology for Compressed Air Energy Storage Power Plant AI Introduction
Abstract：ObjectivesCompressed air energy storage (CAES) is a new type of energy storage system that utilizes the mutual conversion of electrical energy and compressed air potential energy to balance the fluctuation of power grid. The accumulation of relevant experience in the construction and operation of CAES power station is of great significance to the development of CAES technology. In view of the low efficiency of information transfer between the designer and the site, the difficulty of construction control, and the difficulty of overall project process supervision, a whole-process intelligent system suitable for CAES power station was proposed.MethodsFirstly, the construction process of CAES power station was analyzed and its engineering characteristics were found out. Secondly, based on the whole process from design to operation and maintenance of CAES power station, the whole process intelligent construction system of CAES power station was constructed in space and time dimensions. Finally, in the design stage, the key techniques such as forward design drawing were proposed. In the stage of equipment manufacturing, the key technologies such as virtual pre-assembly of equipment were proposed. In the construction stage, the key technologies such as 5D construction management were proposed. In the operation and maintenance stage, the key technologies such as data delivery oriented to operation and maintenance were proposed.ResultsThe verification results of a 300 MW CAES demonstration project show that the construction of the whole process intelligent system of CAES power station is reasonable, and the application of key equipment and software provides technical support for the project.ConclusionsThrough the intelligent system of the whole process of CAES power station and its key technologies, the interworking chain of each stage of power station construction is opened, and the information management of the whole life cycle of CAES power station is realized.Keywords：energy storage;compressed air energy storage (CAES);intelligent construction;forward design;digital delivery58|189|4<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15System Simulation Study on Performance of Non-Supplementary Combustion Liquid Compressed Air Energy Storage System AI Introduction
Abstract：ObjectivesCompressed air energy storage is a type of energy storage technology with large capacity, long cycle, low cost and high efficiency. Due to the strict requirements of gas storage chambers, gaseous compressed air energy storage cannot be widely promoted and applied in multiple scenarios and on a large scale. Therefore, a non-supplementary combustion liquid compressed air energy storage system was proposed.MethodsA theoretical calculation model was constructed to conduct sensitivity analysis on key parameters such as compressor interstage temperature, number of compressor stages, and turbine inlet temperature within the system. The results were compared with those of a non-supplementary combustion gaseous compressed air energy storage system.ResultsToo low or too high interstage temperature in compressors will restrict the improvement of electric-electric conversion efficiency of the system. The number of compressor stages is positively correlated with compressor power consumption, and negatively correlated with the turbine power generation. Under the same inlet pressure, the higher the inlet air temperature of the turbine is, the larger the power generation is, and the higher the electric-electric conversion efficiency is. Compared with the non-supplementary combustion gaseous energy storage system, the density of non-supplementary combustion liquid energy storage system is increased by 3.7 times, and the volume of the storage chamber is decreased by 9/10.ConclusionsThe non-supplementary combustion liquid compressed air energy storage system effectively solves the problem of gas storage chambers, enabling compressed air energy storage technology to be promoted and applied in multiple scenarios and on a large scale. It is of great significance for deep peak shaving of thermal power units and large-scale energy storage in power grids.Keywords：energy storage;peak shaving;non-supplementary combustion;gaseous compressed air energy storage;liquid compressed air energy storage105|318|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15
Energy Storage
Summary of Research and Application of Continuous Monitoring Technology for Carbon Emissions From Thermal Power Units AI Introduction
Abstract：ObjectivesThe accurate measurement of CO2 emission is of great significance for carbon reduction and the operation of carbon market. Continuous monitoring technology is an important means of measuring carbon emissions from flue gas of thermal power units. Compared with the accounting method, it has the advantages of less human intervention, high automation, and strong timeliness.The research progress and application status of continuous monitoring technology for carbon emissions was reviewed, aiming to provide reference for the power generation industry to establish a more perfect carbon emission measurement method system and carbon emission data management system.MethodsThe research progress of CO2 concentration monitoring technology and flow monitoring technology in flue gas was emphasized. The current application status of continuous carbon emission monitoring technology in thermal power plants in the United States, the European Union and China was analyzed. The comparative research situation between continuous monitoring method and accounting method was discussed.ConclusionsThe technical challenge faced by continuous carbon emission monitoring technology is the accurate monitoring of flue gas flow rate. There are great differences in the magnitude and accuracy of carbon emissions obtained by continuous monitoring and accounting methods. Based on the current situation of continuous monitoring of carbon emissions in China, it is recommended to improve the relevant policies and standard system as soon as possible, conduct in-depth technological research, and expand technological applications.Keywords：carbon peak;carbon neutrality;thermal power units;carbon reduction;carbon market;continuous monitoring technology59|69|7<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15Comparative Evaluation of Thermoelectric Decoupling Potential and Economy of Multi-Type Small Capacity Thermal Power Units AI Introduction
Abstract：ObjectivesNew energy power generation faces significant fluctuations and instability in output power and generation load, posing certain challenges to the stable operation of the power system. After thermoelectric decoupling, small-capacity thermal power units participate in the overall operation of the power system, which can improve power grid dispatch efficiency and system security.To this end, various thermoelectric decoupling technologies were adopted to transform three small-capacity thermal power units.MethodsVarious technical routes were compared and studied. by using EBSILON Professional software for simulation experiments, the potential of various thermoelectric decoupling schemes in peak-load regulation was evaluated and analyzed comparatively, and the economics of the retrofitted units were analyzed.ResultsThe water-cooled back-pressure unit has a larger potential space for thermoelectric decoupling, with obvious advantages over other units, and the maximum daily profit under heating for the heat pump retrofit unit increased by 2.171 8 million yuan. With the change of extraction steam heat load, the thermoelectric decoupling potential of the water-cooled condensing unit shows an overall trend of gentle variation and is the easiest to control, with the maximum daily profit under heating for the heat pump retrofit unit increasing by 2.022 5 million yuan. The maximum daily profit under heating for the air-cooled condensing unit with heat pump retrofit increased by 261 300 yuan.ConclusionsThe thermal power units that have undergone thermoelectric decoupling upgrades can significantly enhance their peak shaving effect. The heat pump retrofit can effectively increase daily profits, thereby improving the stability and efficiency of the entire power generation system.Keywords：thermal power units;cogeneration;thermo-electric decoupling;extraction heating;deep peak shaving;virtual power plant;economical analysis78|352|1<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15Advanced Exergoeconomics Analysis of Gas-Steam Combined Cycle Power Generation System AI Introduction
Abstract：ObjectivesThe advanced exergoeconomics analysis method based on exergetic analysis development can refine the economic costs of splitting system components and deeply explore the underlying reasons for the formation of economic costs.MethodsCombining advanced exergetic analysis, advanced exergoeconomics analysis method is used to split the costs of the components in the gas-steam combined cycle power generation system into endogenous, exogenous, avoidable and unavoidable costs, and calculate them.ResultsUnder the design conditions, the avoidable loss in the combustion chamber in the combined cycle power system is the largest, which is 28.41 MW, accounting for 26.55% of the combustion chamber loss. Based on the results of the analysis, different improvement measures are proposed for the turbine to reduce the endogenous and exogenous losses of the system. The largest share of the annualized cost of the system is the endogenous avoidable portion, and the bottom-cycle improvement is prioritized highest for the high-pressure cylinder, followed by the low-pressure cylinder. The exogenous share of annualized costs in the combined cycle power system is 80.59%, of which the exogenous avoidable portion is 40.04%.ConclusionsThe findings of the study can provide the system with a multifaceted energy efficiency evaluation perspective and an improvement direction to optimize the cost.Keywords：power generation system;gas-steam combined cycle;advanced exergoeconomics analysis;economic cost;advanced exergy analysis53|551|1<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15Research on Modeling and Variable Operating Condition Characteristics of Entrained Flow Coal Gasifier Based on Aspen Plus AI Introduction
Abstract：ObjectivesThis research aims to investigate the operational mechanism of a coal gasifier within an integrated gasification combined cycle (IGCC) power plant, with a focus on analyzing and optimizing key operational parameters.MethodsA steady-state thermodynamic model of the gasifier was developed using Aspen Plus. The model’s accuracy was validated by comparing its simulation results with published data. A sensitivity analysis was then conducted to assess the impact of key gasifier parameters.ResultsThe thermodynamic model demonstrates the suitability for simulating steady-state coal gasification processes. The model exhibits high accuracy, simplified structure, and efficient computational performance.ConclusionsThe sensitivity analysis reveals that the oxygen-to-coal ratio holds the most significant influence on the coal gasification process. Both insufficient and excessive oxygen levels result in a reduction of syngas active ingredient production. The optimal oxygen-to-coal ratio for the Shell gasifier model is determined to be approximately 0.85. Water-to-coal ratio also plays a critical role in the gasification process. When sufficient energy is present within the gasifier, increasing the water input leads to higher water content in the syngas, potentially increasing hydrogen concentration. However, excessive water input under energy-constrained conditions can decrease the effective composition of the syngas.Keywords：coal-fired power generation;integrated gasification combined cycle (IGCC);coal gasification;Aspen Plus;thermodynamic model;entrained flow coal gasifier112|413|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15- Abstract：ObjectivesThe wet flue gas desulphurization of coal-fired power plants generates a large amount of wastewater containing heavy metals, the removal of heavy metals from wastewater by coupling of limestone and sodium metaaluminate precipitation and activated carbon adsorption were studied.MethodsThe optimized feed ratio, temperature, and pH value for the precipitation method were obtained, and the experimental parameters for the type of adsorbent and adsorption layer height were optimized. Based on this, engineering tests were conducted on the 300 MW unit of Sanhe coal-fired power plant. Field experiments were conducted with an additional precipitator feeder and adsorption device, and effect was investigated.ResultsThe optimal feeding rate is 160 kg/h, the flow rate is 1 m3/h, and the adsorption height is 10 cm. Under the experimental conditions, the overall heavy metal removal efficiency is significantly improved. Compared with the heavy metal content in the original export of the power plant, the removal efficiency of lead, chromium, copper, and nickel from the export increase by 33.24%, 81.93%, 35.22%, and 57.52%, respectively, after installing a mixed precipitation and adsorption device.ConclusionsThe method of coupling of limestone and sodium metaaluminate precipitation and activated carbon adsorption can effectively promote the removal of heavy metals from desulfurization wastewater, providing guidance for the deep removal of heavy metals in the wastewater from coal-fired power plants.Keywords：coal-fired units;desulfurization wastewater;heavy metal;ultra-high lime with aluminum;activated carbon;adsorption68|301|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15
- Abstract：ObjectivesDue to the fact that the actual operation of the thermal power plant uses high moisture lignite, problems such as blockage and adhesion often occur during coal transportation. Therefore, this article uses EDEM software for numerical simulation analysis based on these problems.MethodsThrough the investigation and analysis of on-site coal samples, in the simulation process, the particle size, moisture content, and total flow of coal were mainly analyzed, and its impact on the fluidity of coal was exploved. After numerical simulation analysis, the effects of various factors were compared using flow velocity and forces between particles.ResultsThe main reasons for blockage are as follons: firstly, the relative interaction between coal particles during the flow process in the silo is caused by the coal particle size being too large or too small; Secondly, as the amount of coal increases, the flow state of coal in the warehouse changes from overall flow to central flow; The last and most important factor is the moisture content of coal, which not only affects its own adhesion but also increases its own weight. Therefore, excessive moisture can cause slow flow and blockage.ConclusionsThe research results can provide theoretical support for solving the problem of coal blockage in coal-fired power plants.Keywords：thermal power plant;EDEM simulation;coal flowability;coal blockage;moisture content;particle size50|62|0<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15
Power Generation and Environmental Protection
- Abstract：ObjectivesAs the proportion of renewable energy in power grids increases year by year, the volatility and uncertainty of the grid are significantly heightened, posing challenges to the safe operation of distribution networks. To address the issue of distributed network reconfiguration in high-proportion renewable energy grids, this paper proposed an online rolling optimization framework.MethodsThe framework utilized a distributed consensus protocol to obtain network topology and node operation information. It can enable automatic reconfiguration in the event of N-1 and N-2 line failures, allowing the distribution network to automatically restore normal operation without the need for additional external triggering signals, thus ensuring economic operation of the grid. Additionally, a rolling optimization method was employed to handle grid fluctuations caused by the high proportion of renewable energy, and generative adversarial network (GAN) technology was used to generate new data, which combined with historical data. It can help to achieve high-precision forecasting of grid operation data.ResultsThe proposed method can achieve automatic economic optimization and self-healing in normal, single-point failure, and two-point failure scenarios.ConclusionsThis method provides an effective solution for ensuring the safe operation of distributed networks in high-proportion renewable energy grids.Keywords：renewable energy;distributed generator;distribution network reconstruction;distribution network self-healing;high proportion of new energy;distributed optimization;look-ahead optimization61|88|17<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15
Low-Carbon and Economic Synergy Optimization Configuration for Microgrid With Hydrogen Energy Storage AI Introduction
Abstract：ObjectivesTraditional electric energy storage has limitations in scale, duration, and environmental impact.Moreover, the renewable energy absorption capacity in the microgrid is low, and low-carbon and economy cannot be taken into account in planning. In order to solve the above problems, based on the basic working principle of hydrogen energy storage, hydrogen energy storage was incorporated into the microgrid instead of traditional electric energy storage, and a low-carbon and economic synergy bi-level optimization configuration model of microgrid with hydrogen energy storage was established.MethodsThe upper-level planning model aimed at minimizing the comprehensive equivalent annual value of the microgrid, based on the joint operation of electricity and hydrogen. The carbon trading mechanism was introduced to plan the capacity of various power generation equipments in the microgrid, which can enhance the low-carbon of the system. The lower-level operation model aimed to minimize the sum of the absolute values of the difference between the new energy output and the load demand. The model also encouraged users to adopt diversified demand-side response behaviors with the goal of accurately tracking the new energy output curve, and feeded back the user’s energy consumption behavior to the upper-level model to optimize the load curve. On the basis of improving the absorption capacity of new energy, the system economy is further improved, deeply exploring the synergy between the low-carbon and economic characteristics of microgrids.ResultsThe simulation results of microgrid in a certain industrial park show that the proposed method yields a planning scheme with excellent low-carbon and economy. Compared with the traditional planning method, the low-carbon and economy are improved by 53.6% and 37.1%, respectively.ConclusionsThe model presented in this paper not only enhances the capacity for new energy absorption but also further improves the system economic performance. It achieves a synergistic enhancement of the microgrid low-carbon and economy.Keywords：microgrid;hydrogen energy storage;new energy;low-carbon;carbon trading;capacity planning;demand response;optimization configuration71|132|12<HTML><L-PDF> <WORD> <Meta-XML>Updated：2025-06-15
Smart Grid
