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List of IssuesDocument Types
- Abstract：Coal combined sample equipment has been widely used in coal,coal-fired power plants and other fields, and its performance deviation may lead to coal trade disputes, which affect the safety and economy of boiler combustion. The paper describes the inspection of combined coal preparation equipment with performance deviation, and iuugrates the process of static and dynamic examination of equipment inspection. By adjusting the equipment, the defects of key parts of the equipment were eliminated, particle size and the reduction ratio of technical parameters were redfined. According to the performance test of relevant technical standards, the equipment performance was evaluated through auuracy, system bias and supplemental tests. The equipment meets the requirements of relevant standards.Keywords：coal;combined sample preparation equipment;performance adjustment;test38|692|0<HTML><L-PDF> <Meta-XML>Updated：2025-06-06
- Abstract：Relying on the national level distributed energy center,to carry out multi energy complementary distributed energy key technologies and experimental platform for the research and application of technology,complete with independent intellectual property rights of multi energy complementary construction of distributed energy technology integration, testing, verification platform. To carry out multi energy complementary distributed system integration technology, regional intelligent energy management technology, regenerative cascade integrated energy storage technology, distributed energy test and evaluation technology, and can provide a platform and system performance evaluation method for the country to carry out distributed, can provide technical support for distributed source program and technology demonstration project, has a good demonstration effect and application promotion value.Keywords：multi energy complementarity;distributed energy;system integration;intelligent management;thermal storage;evaluation47|97|0<HTML><L-PDF> <Meta-XML>Updated：2025-06-06
- Abstract：Dongfang power plant came across many unqualified cases in the year of producing FGD gypsum. By analyzing the cause of unqualified gypsum in Dongfang power plant,it is found out that the main influencing factors of the quality include the operating conditions deviating from the design parameter of desulfurization system, the limited mixed burning of coal, the low efficiency of ESP and the insufficient output of gypsum cyclone separator. Therefore, this paper puts forward three improvement approaches:by controlling the entrance flue gas, by controlling the operational parameters of desulfurization system, and by strengthening the analysis work in environmental laboratory.Keywords：the quality of gypsum;reason analysis;equipment modification;operational control56|2386|0<HTML><L-PDF> <Meta-XML>Updated：2025-06-06
- Abstract：Ultra Low Emission Retrofit reduces pollutant emissions,meanwhile the unit's energy consumption is increased. Through choosing coal-fired units in different areas and different capacity levels and focusing on energy consumption caused by devices and resistance,energy consumption of different retrofit projects and scheme was analyzed and studied. Energy saving and optimization measures were put forward, in order to provide solutions to the unit's overall energy efficiency improvement work on the next stage.Keywords：ultra low emission retrofit;energy consumption;station service power consumption rate;energy saving and optimization47|899|0<HTML><L-PDF> <Meta-XML>Updated：2025-06-06
- Abstract：As the name implies, the optimization of cutout speed is to maximize the wind speed of gentrator sets and enhance utlization ratio of wind energy & draught fan. Through the combination of optimized software and hardware, we have reduced power and adjusted add resistance algorithm between the former and the new cut-out speed to inarease power output without destorying generator sets. After ewploying the optiwized generator sets, it yielded considerable benefits. For example, the power output in 50 MW wind power plant will increase by 6.65% in theory while the actual increment in power output is 11.546 million k Wh.Besides, it enhanced 233.3 standard hours.Keywords：optimization of cut-out speed;utilization ratio;power output22|83|0<HTML><L-PDF> <Meta-XML>Updated：2025-06-06
- Abstract：Based on a 600 MW supercritical pure condensing unit, the optimization design of industrial steam extraction is completed. Through the contrast analysis, at variable load conditions, the cold reheat steam extraction combined with temperature and pressure reducer is the optimal solution. Combining the economic analysis of engineering transformation, the annual coal consumption can be decreased by 1.86 g/k Wh under 50% THA operating condition.Meanwhile, the annual income is up to 35.025 million yuan by 2021, investment recovery period is far less than a year. The project has significant economic and social benefits.Keywords：industrial heating;reheat cold section;desuperheating and decompression;technical economy25|1175|0<HTML><L-PDF> <Meta-XML>Updated：2025-06-06
- Abstract：The treatment and disposal of sulfur fixation ash has gradually become the main bottleneck to limit the development of coal-fired technology in CFB. In this paper, modified methods and the applications of CFB fly ash were introduced.Keywords：CFB;CFB fly ash;utilization39|1304|0<HTML><L-PDF> <Meta-XML>Updated：2025-06-06
- Abstract：To improve the efficiency of circulating water pump during the operation, by means of the CFD software, this article analyses the pressure and velocity distribution of the blade of the pump, proposes a reconstruction scheme of the pump, and studies the operation situation of the scheme in a 330 MW unit. The result shows that the scheme can effectively improve the pressure and velocity distribution of the blade,increase the efficiency of the pump,reduce the power consumption. The power consumption of the pump depressed 0.3663 million kW·h, while the benefit is about 0.1758 million yuan each year ofer the programnce was implemented.Keywords：circulating water pump;efficiency;power consumption;benefit23|2034|0<HTML><L-PDF> <Meta-XML>Updated：2025-06-06
- Abstract：In order to analyze the failure mechanism of the leakage of the the first economizer tube, the metallurgical structure,mechanical properties, fracture morphology and Energy Dispersion Spectrum(EDS) composition analysis of the tube were examined. The results show that the erosion of the economizer tube wall by high speed fly ash is the main cause of the frequent leakage of the first economizer tube.Keywords：economizer tube;leakage;erosion49|1218|0<HTML><L-PDF> <Meta-XML>Updated：2025-06-06
- Abstract：Transformer oil Dissolved Gas Analysis in the DGA(Dissolved Gas Analysis) is an important method for transformer fault diagnosis. According to the characteristics of transformer faults, an adaptive immune genetic algorithm is proposed for on-line fault diagnosis. The algorithm combines the traditional immune algorithm with the constraint independent component analysis c ICA, and takes the prior information of the object as a constraint condition, so that the new algorithm only converges to the fault signal of interest, faster and more efficient classification. Promote the number of antibody populations and update probability to make the antibody library more effective. The algorithm is applied to DGA power transformer data analysis, and the transformer fault on-line diagnosis is realized. Experimental data shows that this algorithm can effectively identify the samples and improve the pertinence and effect of fault diagnosis.Keywords：fault diagnosis;immune genetic algorithm;constraint independent component analysis;transformer oil dissolved gas32|973|0<HTML><L-PDF> <Meta-XML>Updated：2025-06-06
The First Air Fan of the Boiler Frequency Conversion Mode Automatically Switch Frequency in CFB Unit
Abstract：This paper introduces the design idea and control strategy of frequency conversion mode automatically switch frequency of primary air fan of the boiler in CFB unit. Through the analysis of the original control strategy of primary air fan of the boiler and the field test data, the sequential control logic and control parameters of the primary fan are optimized. The experimental results show that the optimized control strategy meets the requirements of the safe operation of primary air fan of the boiler and improves the reliability of the operation of the unit.Keywords：primary air fan;frequency conversion;frequency;automatically switch35|261|0<HTML><L-PDF> <Meta-XML>Updated：2025-06-06- Abstract：Through the macroscopic examination,metallographic examination, tensile test, the causes of the T23 tube burst of final superheater of a power plant are analyzed. The analysis results show that the burst of the tube is characterized by long overheating and material compliance with the standard requirements, but the metallurgical structure is seriously aging. The tensile strength of the tube section near the burst is obviously lower than that of the ASME standard. To sum up, the final superheater tube is running over temperature for a long time, resulting in its accelerated creep speed, dilated tube diameter and aging,resulting in creep holes, creep microcracks, and gradual expansion of micro cracks,leading to fracture of the whole tube.Keywords：final superheater tube;metallographic structure;tensile strength;creep microcrack27|275|0<HTML><L-PDF> <Meta-XML>Updated：2025-06-06
- Abstract：For a 350 MW subcritical Turbo-generator Unit, the vibration of the HP-IP rotor, LP rotor and generator rotor at the critical, 3000 r/min and load conditions is too large. By analyzing the vibration test of these conditions, the result that the vibration of the main reason is the existence of mass and thermal imbalance is proposed. According to the vibration value,operating parameters, shaft center, and rotor structure and bearing support, the method of high-speed dynamic balancing is used to decrease the vibration. The balancing masses at six locations in the HPIP rotor, LP rotor and the LP-generator coupling are added at same time, and the vibration frequency values are less than 100μm in all conditions one-time.Keywords：steam turbine;imbalance;multi-planar;balancing once22|202|0<HTML><L-PDF> <Meta-XML>Updated：2025-06-06
- Abstract：This paper mainly expounds the axial displacement analysis and treatment of the diaphragm produced by a power plant during the reconstruction of the # 1 turbine through-flow. The problem of transformation process is solved after analysis and development. Transformation task of the steam turbine is accomplished.Keywords：diaphragm;displacement;gap19|291|0<HTML><L-PDF> <Meta-XML>Updated：2025-06-06
- Abstract：Bursting failure occurred on waterwall tubes in a power plant. Macroscopic inspection, chemical analysis,mechanical property testing and metallurgical analysis were adopted to examine the failed tube. The results indicated that the tube rupture was resulted from brittle fracture caused by hydrogen damage. The causes of hydrogen damage were analyzed and discussed.Keywords：waterwall;hydrogen damage;intercrystalline crack;decarbonization31|255|0<HTML><L-PDF> <Meta-XML>Updated：2025-06-06
- Abstract：Illustration of various methods to detect energy consumption of ice storage system and to evaluate whether the usage of ice storage system can meet expectation or not. Through critical analysis, this paper is aimed to find out ways to improve the energy efficiency of current system and reduce operating costs in the long term.Keywords：ice storage system;refrigeration unit;ice storage device;water pump;energy efficiency18|466|0<HTML><L-PDF> <Meta-XML>Updated：2025-06-06
- Abstract：According to the similarity theory of fluid mechanics to establish a raft labyrinth water storage model experiments, the model tank internal sets up multiple temperature sensor, analyzes the temperature distribution inside the water tank, the analysis and design flow of dead zone size and temperature measuring point layout position are given. At the same time, the flat cable type temperature sensor is set. The application of cable type temperature sensor in the labyrinth of water storage projects is analysed.Keywords：labyrinth water cool storage;dead zone;Froude criteria;cable type temperature sensor33|50|0<HTML><L-PDF> <Meta-XML>Updated：2025-06-06
- Abstract：With the development of society, the amount of daily visitors in general hospitals are increasing, at the same time,new medical technology is emerging, both from medical technology and patient demands proposed new requirements in line with hospital expansion.This article analyzes and discusses the application of air conditioning energy of saving technology in the hospital renovation and expansion project through two examples of HVAC design.Keywords：hospital renovation and expansion;multiuse four pipe heat pump;temperature and humidity independent control system62|347|0<HTML><L-PDF> <Meta-XML>Updated：2025-06-06
- Abstract：In this paper, the air conditioning system of Suzhou Du Shu Lake gymnasium was retrofited. In consideration of the characteristics of the gymnasium, a magnetic levitation centrifugal unit & a gas vacuum hot water boiler was adopted to replace the original direct-fired lithium bromide unit. In addition, the airflow organization was redesigned, original system of the audience area seat air supply, has been changed, low and high position of the stadium air have been exchanged. Thus, the air conditioning effect was improved with problems solved of unit performance attenuation and heat storage of earthwork static box. At the same time, CFD simulation was used to verify the retrofit plan, and the results proved effective. Finally, the project has been completed, tested, and has achieved good results, which provides a reference for similar gymnasium air conditioning retrofit.Keywords：energy saving retrofit;magnetic levitation air-conditioning unit;airflow;CFD simulation51|98|0<HTML><L-PDF> <Meta-XML>Updated：2025-06-06
- Abstract：A study on energy consumption of refrigeration of summer household airconditioner with ditferent temperatures considering the household electricity scene combination with a variety of air conditioner and environmental parameters. The sensitivity analysis model is established with the method of Finite differential. The results illustrate the relevance of activities of residents and the characteristic of air-conditioner load. It is analyzed that the air power consumption changed with temperatures and the range of sensitivity. The results show that the proper reduction of air conditioner temperatures is beneficial to energy saving in summer.Keywords：howsehold elecricity scenario;sensitivity analysis;energy consumption of air conditioner;energy saving44|1008|0<HTML><L-PDF> <Meta-XML>Updated：2025-06-06
- Abstract：Introduced the design of cold and heat source, chilled water system, heating system, air conditioning and ventilation system and the control system. Analyzed the setting of cold source of ice-storage system with the different operation mode and its control, as well as the heating(preventing congealment) system in different building spaces and different functional areas and the design of air-conditioning ventilation system for different functional theaters.Keywords：exhibition hall;theater;ice-storage air conditioning;cold and heat source;heating system;energy saving21|408|0<HTML><L-PDF> <Meta-XML>Updated：2025-06-06
