scholarly journals Modeling the Heat Scheme of the Combined Heat and Power Plants Using the Software Product “Boiler Designer”

2021 ◽  
pp. 130-139
Author(s):  
Konstantin A. Shtym ◽  
Yuriy B. Goncharenko ◽  
Tatyana A. Soloveva ◽  
Dmitriy R. Bibikov ◽  
Pavel V. Vasilyev
Keyword(s):  
Mathematical Model ◽  
Load Distribution ◽  
Power Plants ◽  
Thermal Power ◽  
Universal Method ◽  
Advantages And Disadvantages ◽  
Optimal Load ◽  
Software Product ◽  
Boiler Designer ◽  
Thermal Scheme

This article describes the rationale for the development of a mathematical model of the thermal scheme of Vladivostok thermal power plant. Four types of turbines are installed at this plant, boiler units operate on coal and natural gas. This makes it difficult to effective load distribution between the turbine units. Application of simplified dependencies, built on the basis of the reporting data, allows to analyse the correctness of the load distribution between the units. The article provides an example of comparing the actual parameters of the plant and calculating based on the simplified characteristics of turbines. This example showing the loss of fuel equivalent from non-optimal load distribution. However, the use of such simplified characteristics has several shortcomings. These shortcomings do not allow using this as a universal method. There is a need to create a full-fledged mathematical model of thermal power plants. The model is developing on the basis of the Boiler Designer software package. The program has a modular structure and allows you to create mathematical models of each unit of equipment, and then, through the purpose of connections, assemble the thermal scheme of the station. This approach is actual for cross-linked heat and power plants, since it allows us to evaluate the efficiency of thermal scheme connections, and not just the operation of the equipment itself. The article provides a simplified model of the station, its advantages and disadvantages

Multi-Objective Optimal Load Distribution Based on Sub Goals Multiplication and Division in Power Plants

2014 ◽  
Vol 494-495 ◽  
pp. 1715-1718
Author(s):  
Gui Li Yuan ◽  
Tong Yu ◽  
Juan Du
Keyword(s):  
Genetic Algorithm ◽  
Load Distribution ◽  
Power Plants ◽  
Optimization Problem ◽  
Thermal Power ◽  
Local Optimum ◽  
Multi Objective Optimization ◽  
Multi Objective ◽  
Optimal Load ◽  
Optimal Load Distribution

The classic multi-objective optimization method of sub goals multiplication and division theory is applied to solve optimal load distribution problem in thermal power plants. A multi-objective optimization model is built which comprehensively reflects the economy, environmental protection and speediness. The proposed model effectively avoids the target normalization and weights determination existing in the process of changing the multi-objective optimization problem into a single objective optimization problem. Since genetic algorithm (GA) has the drawback of falling into local optimum, adaptive immune vaccines algorithm (AIVA) is applied to optimize the constructed model and the results are compared with that optimized by genetic algorithm. Simulation shows this method can complete multi-objective optimal load distribution quickly and efficiently.

Optimized Load Distributed of Power Plant Units Based on Branch and Bound Method

2012 ◽  
Vol 239-240 ◽  
pp. 1565-1569
Author(s):  
Li Xiao Zhang ◽  
Wen Tan ◽  
Xiao Bin Huang
Keyword(s):  
Branch And Bound ◽  
Load Distribution ◽  
Power Plants ◽  
Thermal Power ◽  
Computational Simulation ◽  
Optimal Solution ◽  
Branch And Bound Method ◽  
Unit Load ◽  
Coal Consumption ◽  
Optimal Load

Power consumption is increasing significantly with the rapid economic development. In order to improve the competitiveness of thermal power plants, the problem of units' optimal load dispatch becomes a hot topic of the research about reducing coal consumption. The branch and bound method is presented to solve the problem based on a load dispatch model with velocity constraint in this paper. Branch can create the conditions for the optimal solution of unit load distribution, bound can improve the search efficiency of the optimal solution [1]. Through the computational Simulation, it proves the method described in the paper has the higher convergence speed and can be better applied to the problem of units' optimal load dispatch.

scholarly journals Solar Cells: Current State and Development Prospects

2019 ◽  
Vol 62 (2) ◽  
pp. 105-123 ◽  
Author(s):  
I. I. Maronchuk ◽  
D. D. Sanikovich ◽  
V. I. Mironchuk
Keyword(s):  
Quantum Dots ◽  
Renewable Energy ◽  
Solar Cells ◽  
High Performance ◽  
Power Plants ◽  
National Laboratory ◽  
Thermal Power ◽  
Wave Radiation ◽  
Maximum Efficiency ◽  
Advantages And Disadvantages

The paper considers the main trends in the development of the world market of solar photovoltaics over the past few years. It is shown that the industry is a very rapidly evolving one among the branches of renewable energy and modern industries as a whole. It is obvious that the prime cost of the of solar energy being produced is rapidly approaching the price of electricity generated by traditional methods at nuclear power plants and thermal power plants. The aspects of the development of the efficiency of modern research solar cells made of various materials using innovative technological solutions based on the data provided by the National Laboratory for Renewable Energy (NREL, USA) in 2017 are noted. For the convenience of analysis, the research solar cells are divided into four technological groups. The advantages and disadvantages of solar cells, including the specific features of their production and prospects for development are considered separately for each group; the maximum efficiency for the year 2017 is estimated. A possible alternative to the future development of modern high-performance single-transition solar cells is the use of fundamentally new materials based on nanoheteroepitaxial structures with quantum dots. The possibilities of absorption (processing) by such structures of both short-wave radiation and long-wave part of the solar radiation spectrum for the purpose of generation of electric energy by increasing the efficiency of solar cells on their basis have been demonstrated. The optimal materials for their production and the principles of action of high-performance solar cells on their basis have been considered. The prospects of manufacturing nanoheteroepitaxial structures with quantum dots by liquid-phase epitaxy with pulse cooling of the substrate have been substantiated.

The Analysis of Integrated Financial Capacity of the Power Plant

2012 ◽  
Vol 450-451 ◽  
pp. 1383-1386
Author(s):  
Shu Liang Liu ◽  
Yun Xia Song
Keyword(s):  
Mathematical Model ◽  
Power Plant ◽  
Economic Benefit ◽  
Power Plants ◽  
Comprehensive Evaluation ◽  
Thermal Power ◽  
Fuzzy Comprehensive Evaluation ◽  
Thermal Power Plants ◽  
Financial Capacity ◽  
Power Plant Operation

The stand or fall of power plant operation is extremely important, so we need to analyze the comprehensive financial capacity of power plant. This paper evaluates the economic benefit of Datang Baoding thermal power plants' expansion project based on the fuzzy comprehensive evaluation mathematical model, to determine the effectiveness of the project after implementation.

Ocean Thermal Energy Conversion (OTEC): Choosing a Working Fluid

2009 ◽  
Author(s):  
James H. Anderson
Keyword(s):  
Thermal Energy ◽  
Power Plants ◽  
Thermal Power ◽  
Deep Ocean ◽  
Working Fluid ◽  
Closed Cycle ◽  
Working Fluids ◽  
Advantages And Disadvantages ◽  
Open Cycle ◽  
Ocean Thermal Energy

Ocean thermal energy plants are thermal power plants that use warm ocean surface water as a source of heat and cold seawater from the deep ocean as a heat sink. A historical perspective along with the development of the technology will be presented. A short description describing the subtle differences between OTEC and fossil and nuclear plants will be presented. Open cycle OTEC and closed cycle OTEC will be described with a focus on the influence of choice of working fluid on the design of a plant. Various working fluids could be selected for use in closed cycle OTEC plants. A review and comparison of potential working fluids will address the advantages and disadvantages of the individual fluids. Their characteristics along with a comparison to water as a working fluid in open cycle OTEC will be explained.

Design and Implementation of the Medium and Long-Term Time Scale System Frequency Fluctuations Simulation Platform

2013 ◽  
Vol 392 ◽  
pp. 656-659
Author(s):  
Ting Yu ◽  
Zhao Yu Jin ◽  
Ying Yun Sun ◽  
Jing Huai Lin ◽  
Tian Jiao Pu
Keyword(s):  
Mathematical Model ◽  
Wind Power ◽  
Power Plants ◽  
Frequency Control ◽  
Thermal Power ◽  
Clean Energy ◽  
Simulation Software ◽  
Stable Operation ◽  
Simulation Platform ◽  
The Impact

Large-scale wind power integrates in the grid to provide clean energy; however, it has a negative impact on the stable operation of the grid. To analysis the effect of wind power on frequency control, we need the help of simulation software. But, there has no frequency control mathematical model of wind farm in simulation software available for the user to choose. So this paper designs and establishes a frequency simulation platform, which provides the frequency control mathematical model of wind farms, hydroelectric power plants and thermal power plants. It can not only evaluate the impact of wind power fluctuations on frequency control, but also can quantitatively analysis of the system reserve capacity, as well as AGC performance monitoring function.

scholarly journals METHOD FOR CALCULATING THE COMPOSITION OF CELLULAR CONCRETE

2021 ◽  
pp. 77-85
Author(s):  
V. Martynov ◽  
◽  
O. Martynova ◽  
S. Makarova ◽  
O. Vietokh ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Block Diagram ◽  
Minimum Cost ◽  
Universal Method ◽  
Data Array ◽  
Advantages And Disadvantages ◽  
Cost Of Materials ◽  
The Cost ◽  
Three Factor ◽  
Cellular Concrete

The analysis of existing methods for calculating concrete compositions was carried out. The characteristics and sequence of the calculation-experimental and experimental-calculation methods for the selection of concrete compositions are provided. The advantages and disadvantages of each of the methods are described. These methods are generalized by the general systemic cycle PDCA (Deming cycle), which is determined by the sequence of actions: P (plan) ‒ D (do) ‒ C (check) ‒ A (Action). It was established that for calculating the compositions of the cellular method there is no universal method, which would ensure the achievement of the required strength and average density at the same time. Based on the above, the aim of the thesis was formulated. The aim of the thesis is to develop a method for calculating the composition of cellular concrete, based on experimental-statistical models, which would ensure the production of concrete with the required properties while minimizing the cost of raw materials. A calculation algorithm, a block diagram and a computer program for designing cellular concrete compositions based on experimental-statistical modeling were developed. Using the example of the specified block diagram for calculating concrete compositions, the sequence of calculations is described in detail. The essence of the calculations is that the three-factor mathematical model of the property parameter of cellular concrete, which is supposed to be guaranteed, leads to a second order equation. After that, the roots of the equation are determined. They are substituted into a mathematical model and the composition of concrete is determined in natural values of variable factors. After that, the cost of the composition is determined, which is entered into the data array. Then one of the factors changes, according to the set step and the cycle repeats. At the last stage, the formed data array is processed and the composition with the minimum cost of materials is determined. Testing of the developed software was carried out by processing and calculating a three factor experiment. As a result, the composition of cellular concrete which provides the required strength of foam concrete with a minimum cost of materials, was determined.

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