Abstract:Driven by information technology,energy-saving optimization of factory air conditioning systems has become a important link in improving energy utilization efficiency.Based on the measured data of a certain manufacturing factory,the energy consumption proportion composed of units such as the refrigeration main unit,air system and water system in the air conditioning system is analyzed,and the collaborative control path of operation data collection and central dispatching is proposed.The results show that the system coefficient of refrigeration performance(COP)has increased from 3.2 to 4.1,the energy consumption per unit capacity has decreased by 21.8%,and the alarm frequency has decreased by 75%.Informationization strategies have obvious potential for energy-saving and stability improvement,and can provide an optimized path for industrial energy systems.

Abstract:In response to the problems such as high costs and low efficiency in the traditional asset management model under the growth of power demand,an unmanned power intelligent supervision information platform is constructed.The platform adopts technologies such as internet of things,artificial intelligence,computer information and remote monitoring,and is based on a hierarchical architecture of the perception layer,network layer,platform layer and application layer.It integrates functional modules such as asset maintenance,intelligent inspection,fault elimination,accident repair,upgrading and transformation,energy efficiency management and automatic generation of operation reports,and analyzes it based on a certain park.The research shows that the platform can achieve scientific operation,energy-sving and cost reduction,significantly reduce costs,and ensure the continuity,stability and safety of power supply.

Abstract:The traditional air conditioning system for clean operating rooms has problems such as coupled temperature and humidity control and excessive energy consumption.It is urgent to explore efficient and energy-saving control schemes.A temperature and humidity independent control(THIC)system scheme is constructed,where fresh air takes on the moisture load and the circulating unit operates in dry conditions to achieve separate control of temperature and humidity.The system configuration and air treatment process are established,and an energy-saving analysis is conducted using a hospital in Yingtan,Jiangxi Province as the research object.The results show that compared with the traditional scheme,the total cooling capacity of the THIC system is reduced by 46.2%,the reheat capacity of the circulation unit is reduced by 88.7%,and the annual electricity consumption of the first-level operating room is reduced by 52.3%,with a carbon dioxide reduction of 3.2 tCO2 per year.The temperature and humidity independent control system effectively avoids the phenomenon of cold and hot counteraction,significantly improving air quality and energy-saving effect,providing a technical approach for the green development of medical buildings.

Abstract:Carbon dioxide capture and storage(CCS)technology,as an important means to address global warming,has been widely adopted in China.However,during its promotion process,this technology faces challenges such as insufficient technical maturity,high investment costs,and potential environmental leakage risks.To address the safety challenges in the promotion of CCS technology,taking a 400 000 t/a CCS pilot project of a certain company as the research object,considering the safety requirements of ground capture,pipeline transportation,and underground storage,the hazard and operability study(HAZOP)method combined with the company's risk matrix is adopted to comprehensively assess the process parameters and equipment operation risks at the design stage from multiple dimensions,and improvement plans and measures are formulated for different risks.Specific HAZOP analysis results are obtained,and targeted intervention measures are proposed.The research results can provide references for the subsequent revision of operation procedures,formulation of employee training plans,and supplementation of hidden danger governance measures for the project.

Abstract:Due to the increase in heavy oil prices and the proposal of the'double-carbon'goal,designing dual-purpose burners for oil and gas and enabling 100%load switching for both oil and gas usage has become a preferred choice for some petrochemical users.Based on the principle of calorific value equivalence,a 4-flame swirl burner structure is adopted,and the oil nozzle is designed using bubble atomization technology,the common air supply system is utilized to enable the free switching of the fuel.The results show that the efficiency of the 40 t/h boiler is 91.8%in the oil mode and 93.5%in the gas mode.The steam temperature,pressure,and evaporation volume all meet the design requirements,and the range of oil nozzle atomization steam consumption has been calibrated.The burner enables 100%load-free switching of oil and gas,allowing for flexible selection based on fuel prices,saving fuel costs,and having good economic,safety,and environmental performance.

Abstract:The exterior wall external insulation system(ETICS)has been widely applied in new construction and existing building renovation projects in China.However,during its long-term service,it may experience problems such as detachment and cracking due to the combined effects of multiple environmental factors,which seriously affect the energy-saving effect and safety.The paper systematically reviews the research progress on the degradation mechanism and durability assessment of ETICS,analyzes the influence mechanism of environmental factors at the material-interfacial-system multi-scale level,summarizes the limitations of methods such as laboratory accelerated aging,on-site non-destructive testing,and numerical simulation,explores the integration path of risk-based comprehensive assessment models and machine learning technologies,and proposes a three-dimensional coupling theoretical framework of'environmental factors-material degradation-system failure'.The research shows that the combined effects of multiple factors exhibit significant nonlinear characteristics,and traditional assessment methods cannot accurately predict the degradation of system performance.Machine learning and digital twin technologies provide new approaches for intelligent assessment and early warning,enabling a transition from'passive assessment'to'active early warning'.

Abstract:To address the technical issues such as weak carrying capacity and small downwash flow field existing in current agricultural unmanned aerial vehicle,a coaxial dual-rotor system is introduced to enhance operational efficiency and pesticide application quality.The research focused on the aerodynamic principles of this system,using computational fluid dynamics(CFD)methods to numerically simulate and analyze the downwash flow field of the rotors,and exploring the flow field structure and droplet movement characteristics.The results show that the coaxial dual-rotor design can significantly enhance the downwash airflow,improve the penetration power and uniformity of pesticide spraying,and effectively enhance the carrying capacity.The optimal operating height determined through parameter optimization is 1.5 m.The proposed scheme has the characteristics of high efficiency,precision,and strong adaptability,and can provide technical references for modern agricultural pest control operations.

Abstract:Aiming at the problems of long construction period,high load and unfavorable evaluation of prefabricated buildings in traditional wet floor radiant heating,a cavity-type radiant heating system that combines prefabrication and heating comfort is proposed.By setting up an experimental platform,the thermal performance differences between this system and the traditional wet radiant heating system under different water supply parameters are compared and analyzed.With the aid of numerical simulation,the influence of the temperature field and flow field distribution of the surface layer structure and the size of the cavity module is studied.The results show that the air interlayer of the cavity-type radiant heating system has good thermal insulation performance and can meet the comfort requirements at a lower water supply temperature.The air velocity distribution within the air interlayer presents an'∞'shaped circulation.Appropriately increasing the height and width of the cavity module can effectively improve the floor surface temperature and heat flux density.

Abstract:To address the issues of declining auxiliary equipment efficiency and rising coal consumption for power supply caused by low-load operation of coal-fired power units under the background of deep peak shaving in coal-fired power,and to assist in achieving the'double carbon'goals and the transformation to the new generation of coal-fired power,research on the application of permanent magnetization technology for coal-fired power auxiliary equipment is carried out.Through data calculation,case comparison and technical characteristic analysis,the current energy consumption situation of coal-fired power auxiliary equipment and the limitations of asynchronous motors are sorted out,and the technical advantages of permanent magnet motors are analyzed.Based on actual renovation cases,verify its application effect and analyze the constraints currently faced by the promotion of the technology.The results show that if permanent magnet auxiliary machines are fully applied in the country's coal-fired power plants,it is estimated that 200 million tons of standard coal can be saved annually,and about 50 million tons of carbon dioxide emissions can be reduced.Currently,the promotion of permanent magnet auxiliary machines still faces challenges such as an incomplete industrialization system and insufficient pilot demonstrations.The promotion of permanent magnet auxiliary machines still faces challenges such as an incomplete industrialization system and insufficient pilot demonstrations at present.Research suggests that the permanent magnetization technology for auxiliary equipment is a key path to breaking the problem of excessive coal consumption under low load in coal-fired power and promoting the clean and efficient transformation of the new generation of coal-fired power.It is necessary to accelerate its large-scale application through measures such as industrial innovation and standard improvement.

Abstract:In response to the'double carbon'goals and to optimize the energy structure,exploring the design and equipment selection methods of photovoltaic power stations.By combining theoretical analysis with case studies,discusses the composition and key calculations of photovoltaic power generation systems,and takes the 2.5 MW industrial park power station as the research object for analysis.The results show that through optimized design,an annual power generation of 3.28 million kWh can be achieved,the CO2 emission reduction is 2 600 t,and the payback period of investment is 5.3 a.The research indicates that proper design calculations and equipment selection are crucial means for enhancing power generation efficiency and are of great significance for promoting the green transformation in the industrial sector.

Abstract:The heat exchange performance of the solid heat storage system directly affects the thermal output power of the system and the efficiency of the heat storage and release cycle.Among them,the structure of the heat storage duct is a key factor.For a specific solid heat storage duct structure,the Fluent software is used to simulate and study the heat storage and release characteristics of the heat storage module in the solid electroheat storage device,analyze the influence of the duct structure,and conduct thermal calculations for the matching conditions of the main components of the device.The results show that after 8 h of heating,the average temperature of the heat storage body increased from 300.00 K to 1 008.64 K,the maximum temperature difference in the same cross-section is 2.57 K,and the heat storage capacity of the heat storage module reached 1 482.08 kWh.During the heat release process,the U-shaped duct heat transfer structure enables the air to stay for a longer time.Air with an initial temperature of 300 K passing through the U-shaped heat storage body of the initial temperature of 765 K for heat release can reach an outlet air temperature of up to 577.01 K.The thermal calculations of the system obtained key parameters such as the surface load of the heating wire 11.4 W/m2,the heat exchange area 255.5 m2,and the fan power 7.5 kW.The study shows that the dual-channel structure can significantly improve temperature uniformity and heat exchange efficiency,providing a reference for the design and operation optimization of the solid electroheat storage system.

Abstract:Based on the premixed flame experimental bench,the influence laws of three key parameters,namely the excess air coefficient,flame heat load and heating surface height,on the heat flux density distribution,heat flux distribution and thermal efficiency variation of the quartz plate are studied,and the temperature field on the surface of the quartz plate is collected by using an infrared thermal imager.The results show that when α is 0.5～0.8,the distribution of heat flux density along the radial direction shows a trend of first increasing and then decreasing.At this time,the peak of heat flux density occurs in the corresponding local high-temperature area.When α is between 0.9 and 1.1,the distribution of heat flux density shows a gradually decreasing trend.At this time,the peak of heat flux density occurs in the core high-temperature zone corresponding to the center position.The heat flux through the quartz plate increases with the increase of flame heat load,but the thermal efficiency decreases.When the height of the heating surface H is 15 mm and the flame heat load Qflame is 0.4 kW,the maximum thermal efficiency in the experiment is approximately 60%.

Abstract:To enhance the heating process of steel furnaces and reduce pollutant emissions,a 300 kW flameless pure oxygen burner is selected as the research object.By combining principle design,experimental testing and computational fluid dynamics(CFD)simulation,the system design process of the flameless pure oxygen burner is established.Through experimental testing,its heating characteristics are obtained,and the CFD simulation results are used to further verify the experimental results.The results show that the system can achieve flameless combustion at a furnace temperature range of 700℃to 800℃.The CFD simulation indicates that the temperature uniformity inside the furnace is good,and the numerical analysis is in good agreement with the experimental results.

Abstract:In response to the problems such as increased inter-stage cooling resistance,restricted flow rate and increased unit energy consumption that occurred in the 21 000 m3/h oxygen production unit of Liansteel during the hot season,an energy-saving renovation is implemented,focusing on replacing the core bodies of the first and second stage coolers and optimizing the operation strategies.The results show that after the renovation,the average inlet flow rate of the air compressor increased from 106 273 m3/h to 120 625 m3/h,the average inlet tower flow rate increased from 97 761 m3/h to 109 900 m3/h,the average pressure drop of the first stage cooler decreased from 28.13 kPa to 4.76 kPa,the exhaust pressure increased by 5.14%,and the average oxygen production energy consumption decreased from 0.762 kWh/m3 to 0.719 kWh/m3.The project achieved a monthly comprehensive benefit of approximately 1.63 million yuan,with a static investment recovery period of approximately 0.65 months,demonstrating significant economic benefits.The research verified the efficient energy-saving path based on optimizing inter-stage cooling,and has important promotional effects for the energy-saving renovation and lean operation of similar deep cryogenic air separation units.

Abstract:In the design of the gravity heat pipe heat exchange system for mine intake and return air,due to the fact that the length ratio of the evaporation section to the condensation section is basically the same under various working conditions,it is difficult to meet the performance optimization requirements.Based on the idea of asymmetric segment ratio,a mathematical model of gravity heat pipe return air heat exchange is established,and field tests are conducted on the gravity heat pipe system of a certain coal mine in Shaanxi Province under extremely cold conditions.The results show that the relative errors between the predicted values and the measured values are all less than 6%.The flow rate has a significant impact on the heat transfer performance of the evaporation section and the condensation section.When the ratio of the evaporation/condensation section is optimized to 1.9∶2.6～2.1∶2.4,the best intake air heating effect and single-tube heat exchange capacity can be achieved.

Abstract:Exploring technologies such as smart electricity meters,high-speed acquisition systems,and metering data platforms,and analyzes their applications in precise line loss management,demand-side response guidance,energy efficiency analysis,and carbon accounting support.The research shows that the technology can control the measurement error within 0.2%,achieve minute-level collection of electricity data,provide key data support for identifying energy efficiency potential,optimizing energy allocation,and quantifying carbon reduction benefits,and is of great significance for promoting the green and low-carbon transformation of the power grid.

Abstract:To ensure the accuracy,timeliness and green low-carbon goals of water environment management,focusing on the dike corner section of the Yangtze River Basin,a technical framework integrating intelligent monitoring,dynamic cleaning and integrated source tracing is constructed.By installing high-frequency monitoring equipment to obtain minute-level water quality data,a novel conductivity-pH value-turbidity collaborative diagnostic model is proposed,which effectively identifies sensor failures and solves the problem of high anomaly rate of data in traditional monitoring.By integrating hydrological parameters such as rainfall and flow,a spatiotemporal response matrix is established to analyze the causes and transmission mechanisms of three types of pollution events:Storm runoff,pipe network overflow and industrial emissions.The results show that this integrated system has shortened the pollution warning response time from 4.2 h to 47 min,improved the traceability efficiency,and through intelligent means reduced the frequency of manual inspections and on-site maintenance,indirectly reducing the energy consumption and carbon emissions of management activities,providing a reference for intelligent governance,refined supervision and green operation of the river basin.

Abstract:In view of the problems such as low NO3--N removal rate and poor nitrogen removal efficiency of the existing methods,the optimization of a new low-carbon wastewater treatment process based on the coupling of anaerobic ammonium oxidation and denitrification adopts a spatial segmented coupling strategy,and through the proportional-integral-differential(PID)control algorithm and spatio-temporal gradient aeration control method,the dynamic regulation model integrating multi-dimensional data realizes the multi-parameter coordinated regulation of temperature,carbon-nitrogen ratio(C/N)and dissolved oxygen(DO)concentration.The results show that the NO3--N removal rate of the experimental group within the same time period is 94.3%,enhancing the regulatory effect on the nitrogen transformation process.The DO concentration in the experimental group is within the range of 0.00 mg/L to 0.29 mg/L,and the denitrification efficiency is relatively high,which enhanced the overall efficiency of sewage treatment.

Abstract:Aiming at the problems of high energy consumption and large carbon emissions for building heating in severe cold regions,taking a large office building in Shenyang City as the research object,a water source heat pump system model is constructed based on TRNSYS dynamic simulation technology.Combined with heat recovery and intelligent control strategies,the system energy efficiency is optimized.The research shows that the total heating capacity of the system during the heating season is 426 697.17 kWh,of which 43.25%comes from heat recovery,the peak heating capacity in January reached 157 896.53 kWh,and the energy efficiency ratio(COP)stability is significantly better than that of the traditional system.Through multi-stage temperature regulation,the electricity consumption of the heat pump accounts for 59.07%,and the total electricity consumption is lower than that of similar buildings.Compared with traditional water source heat pump systems,the system has smaller COP fluctuations in the temperature range of-20℃to 5℃,improved low-temperature adaptability,and maintains high energy efficiency during the transition season.

Abstract:Taking a certain wastewater treatment plant in City H as the research object,a carbon emission model is constructed using the emission factor method,and the emissions are calculated based on the operation data from January 2022 to September 2024.The results show that the monthly average carbon emission of the plant is 1 361.97 tCO2,among which the indirect emissions due to electricity consumption are 529.80 tCO2 equivalent per month,and the indirect emissions due to the use of chemicals are 211.70 tCO2 equivalent per month.According to the calculation results,the indirect emissions related to electricity consumption and chemical consumption are the main source of carbon emissions for the wastewater treatment plant in City H.By strengthening operation management,adopting low-energy consumption equipment,and introducing intelligent dosing systems,energy consumption can be effectively reduced.At the same time,renewable energy technologies such as photovoltaic power generation can be supplemented to promote the green and low-carbon operation of the wastewater treatment plant.