The Study on the Post-Evaluation of Benefits of the Abandon Hydropower

2013 ◽  
Vol 441 ◽  
pp. 277-280
Author(s):  
Xiao Long Tao ◽  
Ya Fu Zhang ◽  
Shan Wang
Keyword(s):  
Economic Benefit ◽  
Consumption Rate ◽  
Thermal Power ◽  
Comparison Method ◽  
Calculation Model ◽  
Absorption Capacity ◽  
Environmental Benefit ◽  
Coal Consumption ◽  
Post Evaluation ◽  
Daily Plan

In allusion to the problem that abandon hydropower computing ignores the grid absorption capacity, the calculation model of the abandon hydropower considering grid absorption capacity is proposed. In generating daily plan for reference, according the quantity that in excess of the plan calculates the abandon hydropower. In the order of each plant coal consumption rate to reduce the thermal power output from high to low. Hydropower to replace this part of thermal power electricity. When the economic benefit and environmental benefit is largest, we calculate the abandon hydropower that can absorbed by the system. Calculate the increasing benefit of the abandon hydropower by the with and without comparison method when a engineering have been operating.

Research on Heat/Power Load Optimizing Distribution Model of Heating Units Based on Gene Sequencing Method

2014 ◽  
Vol 1008-1009 ◽  
pp. 562-566
Author(s):  
Wen Sheng Zhao ◽  
Xiao Dong Ding ◽  
Zhi Wang
Keyword(s):  
Consumption Rate ◽  
Thermal Power ◽  
Gene Sequencing ◽  
Distribution Model ◽  
Heat Power ◽  
Coal Consumption ◽  
Operating Condition ◽  
Sequencing Method ◽  
Power Load ◽  
Saving Effect

Based on the basic idea of biological gene sequencing method,“Shotgun Method”,this paper proposes a new method of heat/power load optimizing distribution,named as “Shotgun Method”.This method is mainly based on historical operating data of thermal power plant,and puts the reciprocal of fuel utilization coefficient in the physical sense—factory comprehensive standard coal consumption rate as thermal economic index.Through the calculation of thermal system of principle,every unit can get its own coal consumption characteristic equation,as the foundation operating condition library for the heat/power load distribution.“Shotgun Method” aims at minimum factory comprehensive standard coal consumption rate to establish mathematical model for seeking the best match between operating condition library of each unit.The application instance shows that this method is simple,practical,and the energy saving effect is remarkable.

Modeling of coal consumption rate based on wavelet neural network

2017 ◽  
Vol 08 (03) ◽  
pp. 1750023
Author(s):  
Xiaoqiang Wen ◽  
Shuguang Jian
Keyword(s):  
Neural Network ◽  
Neural Networks ◽  
Consumption Rate ◽  
Orthogonal Experiment ◽  
Thermal Power ◽  
Morlet Wavelet ◽  
Wavelet Neural Network ◽  
Wavelet Function ◽  
Wavelet Neural Networks ◽  
Coal Consumption

In this paper, two wavelet neural network (WNN) frames which depend on Morlet wavelet function and Gaussian wavelet function were established. In order to improve the efficiency of model training, the momentum term was applied to modify the weights and thresholds, and the output of the network was summed up by function transformation of output layer nodes. When the Gaussian Wavelet Neural Networks (GWNN) and Morlet Wavelet Neural Networks (MWNN) were applied to coal consumption rate (CCR) estimation in a thermal power plant, the results confirmed their potency in function approximation. In addition, the influence of learning rate on the models was also discussed through the orthogonal experiment.

Analysis on Thermal Economy and Peak-Shaving Capability for Combined Heat and Power (CHP) Unit in Varying Operating Conditions

2014 ◽  
Vol 521 ◽  
pp. 508-515 ◽  
Author(s):  
Chun Guang Tian ◽  
Xiang Yu Lv ◽  
De Xin Li ◽  
Tian Dong ◽  
Xiao Juan Han
Keyword(s):  
Heat Supply ◽  
Consumption Rate ◽  
Calculation Model ◽  
Operating Conditions ◽  
Coal Consumption ◽  
Peak Shaving ◽  
Steam Extraction ◽  
Heat Quantity ◽  
Operation Test ◽  
Current Area

Based on the principle of featured through-current area being constant, calculation model for parameters of regenerative steam extraction of CHP unit in different heating conditions is developed in this paper through using FROTRAN software. The generated output and thermal economy of the CHP unit are calculated by using the method of equivalent enthalpy drop, and the accuracy of the model is verified. With the purpose to analyze the rationality of different calculation methods, the distribution ratio of coal consumption for heat supply and coal consumption rate for power generation are calculated through method of equivalent enthalpy drop, heat quantity method and method of actual enthalpy drop under the same operating condition. Moreover, according to the operation test on the unit, the highest and lowest generated output of the CHP under various loads of heat supply are determined, which will provide a basis to the subsequent thermoelectric units in participating in peak shaving of power grid.

Thermal Economy Analysis of the Cylinder Unit Efficiency's on the Unit of 1000MW

2011 ◽  
Vol 71-78 ◽  
pp. 2039-2043 ◽  
Author(s):  
Zhi Ping Yang ◽  
Wei Min Kan ◽  
Jing Hui Song ◽  
Jing Bian ◽  
Zhong Guang Fu
Keyword(s):  
Energy Saving ◽  
Consumption Rate ◽  
Thermal Power ◽  
Heat Consumption ◽  
Coal Consumption ◽  
Loss Analysis ◽  
Power Generating Unit ◽  
The Impact ◽  
Economy Analysis

The paper researches with a 1000MW thermal power generating unit. The impact of steam cylinder efficiency's changes on steam turbine’s heat consumption rate and units’ coal consumption rate has been evaluated. It provides the basis for the units loss analysis and guidance for the 1000MW units’ energy saving.

Study on Basic Coal Consumption Characteristics in Dynamic Process of 660MW Ultra-Supercritical Coal-Fired Unit

2020 ◽  
Author(s):  
Junjie Yin ◽  
Ming Liu ◽  
Junjie Yan ◽  
Yongliang Zhao
Keyword(s):  
Steady State ◽  
Consumption Rate ◽  
Constant Load ◽  
Calculation Model ◽  
Dynamic Processes ◽  
Design Calculation ◽  
Coal Consumption ◽  
Steady State Condition ◽  
Load Cycling ◽  
Consumption Rates

Abstract With the spreading of intermittent renewable power, coal-fired power units should cycle frequently to balance the load between power supply side and demand side. Coal consumption of coal-fired units operating in dynamic processes is influenced by many factors, including thermal system, control system, heat storage variation, etc. Therefore, it is very difficult to evaluate the energy efficiency of coal-fired units operating in dynamic processes. It is important to ascertain the basic coal consumption rate in dynamic processes, which is the basis to evaluate the operation performance of coal-fired units. In this study, an off-design calculation model of 660MW ultra-supercritical coal-fired unit is developed and validated with design parameters. The developed model can be used to predict the coal consumption rates under steady-state off-design conditions. The basic coal consumption means the coal consumption of coal-fired units with operating parameters the same as target values. To calculate the basic coal consumption rate, a load cycling process is differentiated into lots of short time periods and every period is regarded as a steady-state condition with constant load, therefore the coal consumption rates in every period are equal to that of the corresponding steady-state condition. The calculation formula of basic coal consumption rates in is derived for load cycling processes. On the basis of the off-design calculation model and assumption of idealized condition, average coal consumption rates during different processes with constant load cycling rates can be calculated and analyzed. Results show that if the initial and final loads are both settled, the basic coal consumption rate remains unchanged and is independent of load cycling rate. If the load cycling amplitude remains unchanged, the basic coal consumption rate increases as the initial load decrease. The study aims to provide benchmark values for the energy consumption analysis in actual dynamic processes, and further study on coal consumption characteristics in dynamic processes will be developed based on it.

Economic Benefit Analyses for Steam-Driven Induced Draft Fan on Basis of the Heat Balance Method

2013 ◽  
Vol 774-776 ◽  
pp. 308-311
Author(s):  
Qi Sheng Xu ◽  
Shi Yin ◽  
Jie Wu ◽  
Xiao Qian Ma ◽  
Yue Xi Yu ◽  
...  
Keyword(s):  
Heat Balance ◽  
Economic Benefit ◽  
Consumption Rate ◽  
Evaluation Method ◽  
Electricity Price ◽  
Coal Consumption ◽  
Coal Price ◽  
Full Cost ◽  
Induced Draft Fan ◽  
The Heat Balance

Based on the implementation of the project of steam induced draft by one factory, heat balance calculation was employed to calculate the coal consumption rate between steam-driven and motor-driven induced draft fans. Besides, an all-purpose economic evaluation method was employed to analyze the investment recovery term and sensitivity of the two plans. The results show that it needs 2.8 years to recover the full cost based on the standard coal price for RMB 900 yuan/t, the electricity price for RMB 0.43 yuan/(kW.h). The evaluation also provided other recovery terms in different electricity price and coal price.

Study on the Influence of Wind Power to the Power Supply Side with Consideration of CO2 Emission Reduction

2012 ◽  
Vol 608-609 ◽  
pp. 644-648
Author(s):  
Nan He ◽  
Zhong Fu Tan ◽  
Chen Zhang ◽  
Jian Qiang An
Keyword(s):  
Wind Power ◽  
Power Supply ◽  
Power Plants ◽  
Power Supply System ◽  
Thermal Power ◽  
Thermal Power Plants ◽  
Analysis Model ◽  
Environmental Benefit ◽  
Coal Consumption ◽  
The Cost

Cost-effectiveness analysis model is established in this paper to examine the influence of the incorporation of wind power to the whole power supply system. Thermal power plants are used as the backup for wind power due to its intermittence, which will increase the coal consumption so that lower the profit of the thermal power plants. A further optimization model is also established to work out the profit of both the power plants and the grid after the incorporation of wind power, and the influence on the CO2 emission as well. It came to the conclusion that although the cost of coal-fired power plants increases because of offering back up to the wind power, CO2 emission from the generation side will decline which has the environmental benefit.

Effect of coal properties on the specific coal consumption in a typical thermal power station in India

1994 ◽  
Vol 35 (7) ◽  
pp. 597-603
Author(s):  
Shail ◽  
M.S. Sodha ◽  
Ram Chandra ◽  
B. Pitchumani ◽  
J. Sharma
Keyword(s):  
Thermal Power Station ◽  
Thermal Power ◽  
Power Station ◽  
Coal Consumption ◽  
Coal Properties

The Integrated Evaluation Index of Energy-Saving and Emission Reduction Generation Dispatching

2011 ◽  
Vol 382 ◽  
pp. 56-59
Author(s):  
Yong Hua Li ◽  
Jun Wang ◽  
Wei Ping Yan
Keyword(s):  
Power Generation ◽  
Energy Saving ◽  
Power Supply ◽  
Coal Combustion ◽  
Emission Reduction ◽  
Evaluation System ◽  
Power Plants ◽  
Consumption Rate ◽  
Coal Consumption ◽  
Reduction Effect

In China, coal combustion to generate electric power is the primary method, the energy-saving and emission reduction is the urgent task. At present, the energy-saving dispatching trial method in some area evaluates energy-saving and emission reduction of coal combustion power generation according to power supply coal consumption rate only. But the power supply coal consumption rate can’t reflect the energy-saving and emission reduction effect of coal combustion power plant overall. For example, the same coal combustion unit, the coal consumption rate is difference when desulfuration system is operating or not; the coal consumption rate of the unit with SCR will be increased; the coal consumption rate of the air-cooled unit is higher than water-cooled unit; etc.. This paper considers synthetically coal consumption rate, pollution emission, water resource wastage, etc., establishes a integrated evaluation system, adopts factor analysis method, gets the integrated evaluation system and index of energy-saving and emission reduction of coal combustion power generation, evaluates energy-saving and emission reduction effect of 5 power plants reasonable. The results show that the index can reflect the energy-saving and emission reduction level of coal combustion power generation.

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