Research on Heat and Power Load Optimizing Distribution for Heat Supply Unit

2014 ◽  
Vol 711 ◽  
pp. 112-116
Author(s):  
Jian Guo Jin ◽  
Jing Wen Yu ◽  
Li Hua Cao
Keyword(s):  
Mathematical Model ◽  
Heat Supply ◽  
Descent Method ◽  
Optimal Distribution ◽  
Parallel Operation ◽  
Constraint Condition ◽  
Experiment Data ◽  
Power Load ◽  
Correction Curve ◽  
The Mathematical Model

According to the thermal experiment data and correction curve of heat supply units, the mathematical analysis formula of thermodynamic characteristic has been given accurately in this paper. Moreover, the mathematical model with objective function and the constraint condition for parallel operation of several heat supply units has been built up. By using simplex method and improved SCDD(Synthesized Constrained Dual Descent) method on the basis of the mathematical model, optimal distribution of heat and power load between heat supply units has been realized, and result indicates that this model is reliable and may achieve the goal of energy conservation.

Temperature Influence on Performance of Oxidation Ponds

1991 ◽  
Vol 24 (5) ◽  
pp. 85-96 ◽  
Author(s):  
Qingliang Zhao ◽  
Zijie Zhang
Keyword(s):  
Mathematical Model ◽  
Temperature Influence ◽  
Field Scale ◽  
Experiment Data ◽  
Computer Technique ◽  
Oxidation Pond ◽  
Optimum Model ◽  
Oxidation Ponds ◽  
The Mathematical Model ◽  
The Relationship

By means of simulated tests of a laboratory–scale oxidation pond model, the relationship between BOD5 and temperature fluctuation was researched. Mathematical modelling for the pond's performance and K1determination were systematically described. The calculation of T–K1–CeCe/Ci) was complex but the problem was solved by utilizing computer technique in the paper, and the mathematical model which could best simulate experiment data was developed. On the basis of experiment results,the concept of plug–ratio–coefficient is also presented. Finally the optimum model recommended here was verified with the field–scale pond data.

scholarly journals Planning of heat supply of territories: model and algorithms

2018 ◽  
Vol 39 ◽  
pp. 02001
Author(s):  
Ekaterina E. Mednikova
Keyword(s):  
Mathematical Model ◽  
Heat Supply ◽  
District Heating ◽  
Systems Development ◽  
Important Task ◽  
Heat Supply Systems ◽  
The Mathematical Model ◽  
Supply Systems

The choice of direction of heat supply systems development in cities is an important task for the authorities, district heating companies and consumers. The author focuses on two main problems in heat supply development questions: territory zoning by type of heat supply and determination of economically feasible heat supply systems sizes. For the solution of these problems, the mathematical model and algorithms were developed. For the solution of this task algorithms were developed.

Optimization Design of Walking Beam Based on Stiffness Constraint

2011 ◽  
Vol 199-200 ◽  
pp. 1368-1373
Author(s):  
Xing Wu Dang ◽  
Jian Long Huang
Keyword(s):  
Mathematical Model ◽  
Optimization Design ◽  
Constraint Condition ◽  
The Mathematical Model

The excessive deformation of walking beam which is used in automatic packaging line of cathode copperplates is analysed. The mathematical model of optimization design of the walking beam is established, using deflection less than 7mm as a constraint condition. The optimization is completed by COSMOSWorks and the most optimal deflection is 6.95mm, the most optimal mass of the walking beam is decreased 25.2%. The optimization also indicates that strength of the walking beam is surplus and further optimization is feasible.

scholarly journals DEVELOPING EXPANDED POWELL’S ALGORITHM TO IDENTIFY THE MATHEMATICAL MODEL PARAMETERS FOR TRANSESTERIFICATION OF FISH FAT INTO BIODIESEL FUEL

2011 ◽  
Vol 14 (3) ◽  
pp. 34-48
Author(s):  
Hai Xuan Le ◽  
Anh Huynh Tuyet Le
Keyword(s):  
Mathematical Model ◽  
Random Search ◽  
Equation System ◽  
Optimal Operation ◽  
Descent Method ◽  
Steepest Descent Method ◽  
Biodiesel Fuel ◽  
Model Parameters ◽  
Operation Conditions ◽  
The Mathematical Model

By employing the system approach methodology, this research showed the expansion of Powell’s algorithm to solve the identification of kinetic parameters in the differential equation system which describes the transesterification of fish fat into biodiesel fuel. The expanded Powell’s method is developed on the basis of the algorithm that combines Taxi-Cab method with random search method and gradient method (steepest descent method). The obtained results allow us to simulate and optimize the biodiesel fuel production in order to assess the influence of technological factors on the effect of process and to determine the optimal operation conditions. The expanded Powell’s algorithm can also be advantageously applied to simulation or optimizzation in the cases when the mathematical model of the research object contains several parameters which must be identified.

Choosing the best options of timber cargo traffic

2015 ◽  
Vol 8 (2) ◽  
pp. 63-67
Author(s):  
Сушков ◽  
Sergey Sushkov ◽  
Бурмистрова ◽  
Olga Burmistrova
Keyword(s):  
Mathematical Model ◽  
Cost Function ◽  
Rail Transport ◽  
Optimal Distribution ◽  
Optimal Cost ◽  
Optimal Scheme ◽  
Mode Of Transport ◽  
And Function ◽  
The Mathematical Model

In the article the mathematical model of the optimal distribution of traffic between the various modes of transport. The model of the distribution of the requirements of traffic by mode of transport, the optimal cost function at the railway timber transportation option and function of the optimal scheme of cargo flows, taking into account interoperability timber. The solution of these tasks to determine the scope of rational road and rail transport under various conditions.

Analysis of the Steering Mechanism Based on Spatial Linkages of an Underground Vehicle

2012 ◽  
Vol 479-481 ◽  
pp. 894-898
Author(s):  
Lei Dong ◽  
Bu Kang Wang ◽  
Rui Min Shi
Keyword(s):  
Mathematical Model ◽  
Computer Simulation ◽  
Simulation Software ◽  
Nonlinear Mathematical Model ◽  
Experiment Data ◽  
Initial Design ◽  
Steering Mechanism ◽  
Spatial Linkages ◽  
The Mathematical Model ◽  
Real Vehicle

To achieve the goal of the 4WS (four-wheel steering), the spatial linkages were applied to the steering mechanism of the underground vehicle. The operation principle of the steering mechanism was firstly obtained. Then a nonlinear mathematical model of spatial linkages mechanism was deduced and the deviation from the Ackermann theory is about 7%. The results were acquired by solving the equations numerically in computer simulation software and compared with the real vehicle experiment data. It is demonstrated in the paper that the mathematical model is accurate and the error is within 6.5%. It is thought that this information may be useful in the initial design of the steering mechanism of the underground vehicle.

Mathematical Model of Relation between Microstructure and the Yield Strength of High Carbon Steel Wire Rods

2010 ◽  
Vol 146-147 ◽  
pp. 1784-1787
Author(s):  
Yun Li Feng ◽  
Jie Li
Keyword(s):  
Mathematical Model ◽  
Carbon Steel ◽  
Yield Strength ◽  
Steel Wire ◽  
High Carbon Steel ◽  
Optical Microscope ◽  
High Carbon ◽  
Experiment Data ◽  
The Mathematical Model ◽  
Plate Distance

Ferrite content and the plate distance of pearlite of high carbon steel wire rod are analyzed by Optical Microscope and SEM, using quantitative microstructure analysis technology. The relation between microstructure and yield strength of high carbon steel wire rods was investigated. And the mathematical model of the relation was established as: σs(Pa)=104.52×106+161.70(1－fα 1/3)S－1(m). It was validated by experiment data that the mathematical model agrees well with the experimental results.

scholarly journals Development and experimental verification of the mathematical model of thermal inertia for a branched heat supply system

2019 ◽  
Vol 17 (3) ◽  
pp. 413-424 ◽  
Author(s):  
Andrey Batukhtin ◽  
Irina Batukhtina ◽  
Maxim Bass ◽  
Sergey Batukhtin ◽  
Mihail Kobylkin ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Experimental Verification ◽  
Heat Supply ◽  
Thermal Inertia ◽  
Heat Supply System ◽  
Supply System ◽  
The Mathematical Model

The Establishment of Electricity Price Model Based on User Satisfaction and Power Supply Enterprise Return

2014 ◽  
Vol 488-489 ◽  
pp. 1348-1353
Author(s):  
Bing Qing Li ◽  
Xue Liang ◽  
Dong Sheng Yang ◽  
Bo Hu ◽  
Dan Li
Keyword(s):  
Mathematical Model ◽  
Power Supply ◽  
User Satisfaction ◽  
Simulation Analysis ◽  
Electricity Price ◽  
Electricity Pricing ◽  
Power Supply Enterprise ◽  
Power Load ◽  
The Mathematical Model ◽  
The Relationship

With the improvement of the power users requirements for power quality, traditional electricity pricing model cannot meet the needs of the users. At first, a concept of power user satisfaction was proposed, and the mathematical model of different categories of power user satisfaction was established. On the basis of comprehensive analysis of various kinds of power load characteristics, the mathematical model of the relationship between power and electricity price was given, and the simulation analysis shows that in the case of certain electricity price, power supply returns will be increased considering user satisfaction. Finally, an electricity price design mathematical model considering both user satisfaction and power supply enterprise's returns was established, and the model will provide certain theoretical basis to formulate a reasonable electricity price.

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