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Volume38，Issue2，2017

  • Influence Factors of Coal Price and Forecast Analysis

    ZHAO Wei
    Vol. 38, Issue 2, Pages: 1-6(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.001
    Abstract：Coal is the basis of our energy,the price is directly related to national economy and people’s livelihood.Analyzed the macro economy,energy demand,coal production,logistics,coal stocks,seasonal change etc,such as the influence of factors on the price of coal,and coal price forecasting.  
    Keywords：coal;price;influence factors;forecast analysis  
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  • Strength Analysis of P91 Hot Pressing Elbow in Main Steam Pipeline of Supercritical Unit

    LIU Ming, BAI Jia
    Vol. 38, Issue 2, Pages: 7-11(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.002
    Abstract：The analysis method of main steam pipeline of P91 hot pressing elbow of a 600 MW supercritical unit strength analysis using finite element simulation,got a 90 degree bend structure under internal pressure stress distribution,and on the basis of the simulation results select the measuring position,the resistance strain measurement technique on the stress distribution of the elbow the test,the test results and the simulation results is better,finally using the finite element simulation results of the bend strength was checked.  
    Keywords：hot pressing elbow;P91;stress test;main steam line;simulation analysis  
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  • Fatigue Reliability Analysis of Connecting Rod Based on Goodness of Fit Test

    HAO Chen-guang, WANG Yong, ZHOU Yu-hao
    Vol. 38, Issue 2, Pages: 12-15(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.003
    Abstract：Based on the analysis of the common distribution scope,on the basis of the fatigue life of connecting rod using the maximum likelihood method fitting distribution parameters,through the K-S hypothesis test,we test was carried out on the parameter model and correlation analysis,obtained the suitable for reliability analysis of general distribution model of connecting rod fatigue life. In the model,on the basis of analyzing the reliability of connecting rod life expectancy and life expectancy,reliability,it is concluded that the type of B10 life of connecting rod. The establishment of a connecting rod fatigue reliability analysis of the process and method,assessed the reliability of connecting rod life,use of the reliability of the connecting rod is of great significance.  
    Keywords：connecting rod;fatigue;reliability;goodness of fit;K-S inspection;reliability life  
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  • Analysis of a New Coordinated Control Strategy for one Million Ultra Supercritical Thermal Power Units

    ZHOU Song-guo, LUO Chang-fu
    Vol. 38, Issue 2, Pages: 16-20(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.004
    Abstract：At present, the domestic ultra-supercritical thermal power unit AGC mode are widespread the problem of insufficient electricity load response rate,the main reason is that the poor quality of coordinated control system of main steam pressure control. Due to the main steam pressure control of multivariable coupling factors are variables how to eliminate the mutual coupling effect becomes the core technology to improve quality of main steam pressure control. The author through the theoretical analysis, a new coordinated control strategy is proposed to load change public instruction in decomposition of coordinated control system, to form multiple independent subsystems variable load feedforward quantity, and design a set of intelligent fuel overshoot logic, successfully achieve decoupling. The control strategy is applied to the CLP vote for anhui pingwei three periods of 2×1050MW ultra supercritical thermal power unit,and achieved good application effect, practice shows that this strategy can improve the quality of main steam pressure control, electric load response rate can be improved.  
    Keywords：rate;MSP;independent;feedforward;decoupling;fuel-locking  
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    Updated：2025-06-06

  • Analysis and Processing for Turbine Main Control Instruction Mutation

    LI Xin-jian
    Vol. 38, Issue 2, Pages: 21-25(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.005
    Abstract：Aiming at a certain power plant with the XDC-800 DCS system, When the block turbine main control instruction, transformed by primary frequency modulation homologous device, increase or decrease, the turbine main turbine change suddenly. Based on the control loop simulation analysis, this paper puts forward the logic optimization measure, which Provides a reference for block increase or decrease of the same DCS system design control loop.  
    Keywords：primary frequency modulation;EPID;DEH;CCS;block;simulation;scan cycle  
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  • Logic and Design of the Balance Loop in the Control System of Power Plant

    YU Xiao-min, ZHU Guang-chang, ZHANG e
    Vol. 38, Issue 2, Pages: 26-29(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.006
    Abstract：Balance loop is widely used in the control system of the power plant.The purpose of balance loop is to balance the output of the equipments in pair like fans and feederwater pump.As the standard for balance loop is not available,so the design for it is variable.This article sorted all the kinds of design for balance loop which is used in different power plants,summarized the characters of different designs with hope that it can provide some reference for the late design.  
    Keywords：balance loop;logic;design;power plant  
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  • Application Study of Optimization for the Cold Source System in a 300MW Unit

    LUO Zhen-xin
    Vol. 38, Issue 2, Pages: 30-33(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.007
    Abstract：This article introduced a technology of reconstruction for the cold source system. And applied in a 300 MW unit,the economic benifits were analyzed,the result showed that: this technology can substantially depress the pressure of steam condenser,comparing with the pressure before reconstruction,the pressure depressed 1.2 kPa;after its application,the standard coal consumption of the unit depressed 3.6g/kW·h,the energy-saving benefits is about 3.267 million yuan each year.  
    Keywords：the cold source system;the pressure of steam condenser;the standard coal consumption;the energy-saving benefits  
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  • Analysis for the Technology Roadmap of Flue Gas Ultra Low Emission in CFB

    YE Wei-ping, QIU Guo-ming, DU Zhen, WEI Hong-ge, ZHANG Yang, ZHU Yue
    Vol. 38, Issue 2, Pages: 34-37(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.008
    Abstract：The paper compared the desulfurization,denitrification and dust removal technology of ultra-low emission in CFB. analyzed the investment and operating costs to achieve ultra-low emission in CFB. Thus proposed the technology roadmap to achieve ultra-low emissions for CFB,and guided the implementation of ultra-low emission transformation for CFB.  
    Keywords：CFB;denitrification;desulfurization;dust;ultra-low emission  
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  • Evaluation Index and Calculation Method of Steam Pipeline

    ZHANG Jia-jia, SHEN Yang
    Vol. 38, Issue 2, Pages: 38-41(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.009
    Abstract：In the light of the actual situation of heat supply engineering in power plant,some commonly used thermal evaluation index and calculation method of the steam pipe is introduced.This paper expounds the evaluation test method of steam pipeline and the revised calculation of steam pressure drop and temperature drop.  
    Keywords：steam pipe;thermal performance indicators;test correction  
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  • Technical Work Analysis of Power Plant Non-electrical Protections

    CAO Sen
    Vol. 38, Issue 2, Pages: 42-45(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.010
    Abstract：The power plant generator and transformer’s relays are composed of both non-electrical and electrical protections.Engineers pay less attention to non-electrical protection on daily work.Many non-electrical protections are set incorrectly according to the specifications. In this paper,by analyzing an actual accident,compiling the regulations of non-electrical protection,analysis of non-electrical protection secondary circuit,we hope it will be helpful to non-electrical protection management work.  
    Keywords：non-electrical protection specification;non-electrical protection accident;non-electrical protection analysis  
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  • Frequency Conversion of Electric Feed Water Pump with Front Pump

    ZHANG Wu-zhi, CHEN Guo-song
    Vol. 38, Issue 2, Pages: 46-49(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.011
    Abstract：Electric power feed pump driven by hydraulic coupling for three rated capacity of a 330 MW power plant in a power plant.Through the conversion of two electric water pump,the electric pump power consumption dropped significantly,plant power consumption reduced and the economic efficiency of the unit improved.  
    Keywords：slectric feed pump;frequency conversion;power consumption  
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  • Research and Analysis of HVAC System Commissioning in Maintenance Hot Workshop

    LIU Shi-hao, LUO Wei-tao
    Vol. 38, Issue 2, Pages: 50-54(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.012
    Abstract：Presents the HVAC system and its control logic used in the Maintenance Hot Workshop.Commission the HVAC system,finds that the exhaust air flow rate in some rooms is insufficient,the temperature inside cannot meet the design requirement. Analyse the causes.According to the analysis, summarizes the factors which should mainly be considered when design,commissioning,operating, maintaining the system. Emphasize the importance of system commissioning on the normal operation of HVAC system in Maintenance Hot Workshop.  
    Keywords：maintenance hot workshop;air conditioning and ventilation;commissioning  
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  • Water Mist Cooling Technology Application Research in the Field of Air Conditioning Energy Conservation

    LIU Yong
    Vol. 38, Issue 2, Pages: 55-58(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.013
    Abstract：Because of the influence of the earth’s greenhouse effect, the summer outdoor temperature rising leads to air conditioning in the summer often appear such problems as high voltage protection and the working current is larger,both cause increase of energy consumption,and the safe hidden trouble of equipment operation. In order to reduce the central air conditioning in the summer running cost and safe operation. Building using air conditioning by adding the(soft) on the wind outdoor condenser water spray cooling principle of processing, can not only improve the refrigeration efficiency and reduce the operation cost and equipment safety hidden trouble.  
    Keywords：air cooled central air conditioning;water mist cooling device;energy saving reconstruction  
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  • Thermal Comfort Simulation Analysis of the Air Supply System in the Project

    JIAO Hui
    Vol. 38, Issue 2, Pages: 59-64(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.014
    Abstract：Take an actual project as an example, we conducted a ventilation simulation to compare top-down air supply and side air supply solutions. We took the results of air distribution,ventilation velocity distribution,PMV-PPD distribution etc as the references to select and determine the HVAC design strategy.  
    Keywords：tall space;air ventilation;thermal comfort;temperature distribution;air velocity distribution;assessment standard  
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  • Economic Analysis of Condensing Exhaust Air Heat Recovery Fresh Air All-in-one Unit in Hangzhou Area

    PAN Zu-dong, WANG Zhi-yi, YANG Song-jie, WANG Xin-min
    Vol. 38, Issue 2, Pages: 65-68(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.015
    Abstract：Condensing exhaust air heat recovery fresh air all-in-one unit deals fresh air with the heat of building exhaust air as cold or heat source and has very high unit efficiency.In this paper, energy consumption influence of condensing exhaust air heat recovery fresh air all-in-one unit introduce to the office building of air source heat pump system is analyzed.Equipment is calculated using static and dynamic payback period of investment in fixed number of year. In a similar system condensing exhaust air heat recovery air machine has very good application prospects.  
    Keywords：exhaust air;heat recovery;air source heat pump;investment payback  
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  • Air Conditioning System Design for Sheraton Hotel, Shenyang

    SHAN Jin-long, ZHANG Yan-jun, WU Jian
    Vol. 38, Issue 2, Pages: 69-73(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.016
    Abstract：Considering the features of the hotel,adopts water-cooled centrifugal chillers and atmospheric pressure gas-fired hot water boilers and gas-fired steam boilers as cold and heat sources of the air conditioning system,This article had a thorough analysis on the following aspects: the suction mode of fresh air in winter,valve control with common header, fan coil of guest room, rated air conditioning system of lobby,ventilation and heating of garage;at the same time,made follow-up feedback about hotel’s operating conditions and analyzed the key issues.  
    Keywords：cold and heat source;all-air system;primary air fan-coil system;primary air heating;variable flow distribution with primary pump system  
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  • Air-conditioning System Optimal Design for an IMAX Projection Room in Cold Region

    WANG Yao-ping
    Vol. 38, Issue 2, Pages: 74-77(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.017
    Abstract：The sample project for this analysis is ‘Liaoning science and Technology Museum’.In this project, the air-conditioning system design for an IMAX-film project room in cold region is written up. All-air system is used. Direct air-conditioning system is used in working time and primary return air system is for part time. Details are focused on the design calculation and switching between the two systems. When in direct system mode, part of the air supply is extracted from the auditorium. Required surrounding environment can be reached with proper filtration measures taken.  
    Keywords：IMAX-film project room;film-based projection room;primary return air system;direct air system;switching  
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  • Economic Analysis of the Central Air Condition System for Buildings in a Park at Hangzhou

    JIANG Wen, YANG Peng
    Vol. 38, Issue 2, Pages: 78-80(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.018
    Abstract：This article has made a research on central air condition system of a park,the operating principle of the system with cold/heat source also has been introduced. The economic was analysed between the central air condition system and the distributed system. The result showed that: the central air condition system can effectively control the performance parameters of the air in the house within the scope of the design value; meanwhile,the operation cost of the central air condition system can save 0.29 million yuan in the summer season,and 0.132 million yuan in the winter season respectively.  
    Keywords：the central air condition system;the distributed air condition system;economic  
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  • Analysis of the Key Points of HVAC Design for a Greenhouse in Cold Area

    XU Cui
    Vol. 38, Issue 2, Pages: 81-84(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.019
    Abstract：The greenhouse is a high energy construction, especially in cold area.It needs to adopt a variety of effective ways to reduce energy consumption as much as possible,and also must satisfy the needs of the plant growth and basic requirements for the staff. This paper introduces in detail the key points of HVAC design of a greenhouse in cold area,from the enclosure structure,heating and cooling system,heat transfer enhancement of radiator and ventilation of different seasons,take the Heixiazi Botanical Garden as an example.  
    Keywords：greenhouse in cold area;enclosure structure;heat transfer enhancement of radiator;ventilation system  
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  • Application on Control Strategy of Variable Fresh Air in South Metro Station

    LUO Jia, ZHOU Qun, GAO Ji-xiang
    Vol. 38, Issue 2, Pages: 85-87(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.020
    Abstract：According to a south metro station,through theoretical analysis and calculation,studying on control strategy of variable fresh air. In non-rush hours,the fresh air load of station big system is saved about 26.2%.  
    Keywords：metro station;variable fresh air;load;energy-saving  
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  • River-water Temperature Analysis and Energy Consumption Analysis of the Huangpu River River-water Source Heat Pump in Cooling Season

    FA Zheng-hao
    Vol. 38, Issue 2, Pages: 88-91(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.021
    Abstract：The temperature change of the outdoor air and the river water in cooling season in Shanghai is analyzed.The energy consumption comparison between the river-water source heat pump and the conventional cold source unit is carried out using daily data. River-water source heat pump has its advantage but not significant in energy saving design in cooling season.  
    Keywords：huangpu river;river water temperature;river-water source heat pump;cooling energy consumption comparison  
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  • HVAC System Design of a News Center Building

    LONG Cong-yong
    Vol. 38, Issue 2, Pages: 92-94(2017) DOI: 10.3969/J.ISSN.2095-3429.2017.02.022
    Abstract：Presents the air conditioning system design of a news center building. Analyze the air conditioning system for different function room in news center building,available as a reference for similar design.  
    Keywords：news center building;stratified air conditioning;noise absorption design;energy saving  
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