scholarly journals Influence of the composition and agglomeration pressure on the compaction level of the fertilizers based on biomass ash and digestate

2018 ◽  
Vol 10 ◽  
pp. 02035
Author(s):  
Marek Wróbel ◽  
Jarosław Frączek ◽  
Krzysztof Mudryk ◽  
Marcin Jewiarz ◽  
Krzysztof Dziedzic
Keyword(s):  
Power Plant ◽  
Compaction Pressure ◽  
Similar Degree ◽  
Compaction Process ◽  
Biomass Ash ◽  
Specific Density ◽  
Test Mixture ◽  
Density Index ◽  
Absolute Density ◽  
The Given

The paper presents the results of research aimed at determining the influence of the composition of the fertilizer mixtures and the compaction pressure on the specific density and density index of fertilizer granules. Investigated mixtures were prepared from fly ash from power plant fuelled by biomass and digestate from biogas plant. The urea, sulfur and phosphorite were also added as enhancing additives. For granule samples made on a strength machine, their specific density was determined on a quasifluid-pycnometer. To determine the effect of agglomerate pressure on the compaction process, the absolute density of the materials was omitted. In such case it was needed to introduce a density index AI. Such a presentation of the results obtained has made it possible to clearly determine how the density of the test mixture results in the applied agglomeration pressure. The specific density of the resulting granules was in the range of 0.85-1.27 g/cm3. The determined density index for the given pressure was in the following ranges: 0.44-0.49 g/cm3 (pressure 100MPa), 0.47-0.51 g/cm3 (pressure 150MPa) 0.51 - 0.59 g/cm3 (200MPa pressure). This means that, regardless of the contribution of components to the mixture at the given pressure, a similar degree of compaction was obtained.

Nonlinear Trend Analysis of Mill Fan System Vibrations for Predictive Maintenance and Diagnostics

2012 ◽  
Vol 58 (4) ◽  
pp. 351-356
Author(s):  
Mincho B. Hadjiski ◽  
Lyubka A. Doukovska ◽  
Stefan L. Kojnov
Keyword(s):  
Power Plant ◽  
Trend Analysis ◽  
Thermal Power Plant ◽  
Power Plants ◽  
Thermal Power ◽  
Balkan Peninsula ◽  
Predictive Maintenance ◽  
Nonlinear Trend ◽  
The Subject ◽  
The Given

Abstract Present paper considers nonlinear trend analysis for diagnostics and predictive maintenance. The subject is a device from Maritsa East 2 thermal power plant a mill fan. The choice of the given power plant is not occasional. This is the largest thermal power plant on the Balkan Peninsula. Mill fans are main part of the fuel preparation in the coal fired power plants. The possibility to predict eventual damages or wear out without switching off the device is significant for providing faultless and reliable work avoiding the losses caused by planned maintenance. This paper addresses the needs of the Maritsa East 2 Complex aiming to improve the ecological parameters of the electro energy production process.

scholarly journals Economic Environmental Dispatch of Wind Integrated Thermal Power System

2020 ◽  
Vol 8 (6) ◽  
pp. 5186-5192
Keyword(s):  
Genetic Algorithm ◽  
Power Plant ◽  
Thermal Power ◽  
Nsga Ii ◽  
Strength Pareto Evolutionary Algorithm ◽  
Experimental Constraint ◽  
Thermal Power System ◽  
Power Plant Operation ◽  
Simulation Results ◽  
The Given

In electric power plant operation, Economic Environmental Dispatch (EED) of a thermal-wind is a significant chore to involve allocation of production amongst the running units so the price, NOx extraction status and SO2 extraction status are enhanced concurrently whilst gratifying each and every experimental constraint. This is an exceedingly controlled multiobjective optimizing issue concerning contradictory objectives having Primary and Secondary constraints. For the given work, a Non-dominated Sorting Genetic Algorithm-II (NSGA-II) is recommended for taking care of EED issue. In simulation results that are obtained by applying the two test systems on the proposed scheme have been evaluated against Strength Pareto Evolutionary Algorithm 2 (SPEA 2).

DEVELOPMENT OF A HYBRID SOIL PRESSURE SENSOR AND ITS APPLICATION TO SOIL COMPACTION

2020 ◽  
Author(s):  
Mark Talesnick ◽  
Moti Ringel ◽  
Kyle Rollins
Keyword(s):  
Pressure Sensor ◽  
Soil Compaction ◽  
Compaction Pressure ◽  
Confining Pressure ◽  
Soil Pressure ◽  
Compaction Process ◽  
Vibratory Compaction ◽  
Soil Strain ◽  
The Relationship

A new soil pressure sensor based on a combination of the deflecting membrane and fluid filled approaches has been developed. The advantages of this combined approach are that issues of sensor compliance are eliminated without reducing the effectiveness of the sensor to be used for dynamic measurements. Calibration and verification testing performed under controlled laboratory conditions illustrate these benefits. The new system was implemented in a full-scale field trial which involved the construction of a compacted engineered fill 1.8 m in height. As each layer of fill was placed and compacted vertical in-soil pressure and vertical in-soil strain were continuously measured. During the vibratory compaction process both vertical soil pressure and vertical soil strain histories were captured in each layer. The data collected allowed for the determination of fill stiffness for both static and dynamic conditions. The results illustrate the effect of both confining pressure and strain level on fill stiffness. The relationship between compaction pressure and depth is clearly defined.

scholarly journals Exergetic Diagnostics of A Gas-And-Steam Power Plant

2019 ◽  
Vol 29 (1) ◽  
pp. 1-17
Author(s):  
Wojciech Stanek ◽  
Tomasz Simla
Keyword(s):  
Power Plant ◽  
Combined Cycle ◽  
Thermodynamic Efficiency ◽  
Energy Balancing ◽  
Steam Power ◽  
Energetic Analysis ◽  
Thermal Diagnostics ◽  
Exergetic Analysis ◽  
The Given ◽  
Exergy Losses

Abstract Evaluation of thermodynamic efficiency of a power plant is usually performed using the method of so-called thermal diagnostics, based on energy balancing. Energetic analysis is however suitable only for a quantitative assessment and for comparing similar technologies. In order to properly assess the origins of energy losses in the given system, an exergetic analysis has to be applied. The paper describes the rules of exergetic diagnostics, which greatly extends the potential of classic thermal diagnostics. A calculation example of a combined cycle power plant is included. The example demonstrates the potential of exergetic diagnostics for locating exergy losses and explains the reasons for increased consumption of fuels by comparing two working conditions of the system: reference and operational.

scholarly journals Influence of Raw Material Drying Temperature on the Scots Pine (Pinus sylvestris L.) Biomass Agglomeration Process—A Preliminary Study

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1809 ◽  
Author(s):  
Marek Wróbel ◽  
Marcin Jewiarz ◽  
Krzysztof Mudryk ◽  
Adrian Knapczyk
Keyword(s):  
Bulk Density ◽  
Compaction Pressure ◽  
Raw Material ◽  
Compaction Process ◽  
Drying Temperature ◽  
Agglomeration Process ◽  
Mechanical Durability ◽  
Preliminary Study ◽  
And Storage

For biomass compaction, it is important to determine all aspects of the process that will affect the quality of pellets and briquettes. The low bulk density of biomass leads to many problems in transportation and storage, necessitating the use of a compaction process to ensure a solid density of at least 1000 kg·m−3 and bulk density of at least 600 kg·m−3. These parameters should be achieved at a relatively low compaction pressure that can be achieved through the proper preparation of the raw material. As the compaction process includes a drying stage, the aim of this work is to determine the influence of the drying temperature of pine biomass in the range of 60–140 °C on the compaction process. To determine whether this effect is compensated by the moisture, compaction was carried out on the material in a dry state and on the materials with moisture contents of 5% and 10% and for compacting pressures in the 130.8–457.8 MPa range. It was shown that drying temperature affects the specific density and mechanical durability of the pellets obtained from the raw material in the dry state, while an increase in the moisture content of the raw material neutralizes this effect.

The Influence of Direct Normal Irradiance Variation on the Optimal Parabolic Trough Field Size: A Problem Solved With Technical and Economical Simulations

Solar Energy ◽  
2002 ◽  
Author(s):  
Volker Quaschning ◽  
Rainer Kistner ◽  
Winfried Ortmanns
Keyword(s):  
Power Plant ◽  
Solar Irradiance ◽  
Thermal Power ◽  
Field Size ◽  
Parabolic Trough ◽  
Simulation Tools ◽  
Direct Normal Irradiance ◽  
Solar Field ◽  
The Given ◽  
Made In

One of the main problems when designing a solar thermal power plant is to find the optimal parabolic trough field size. Errors made in this context can easily lead into a financial disaster. Simulation tools that handle all aspects of a power plant (technical as well as economical) treat such economical problems as a whole and can be very helpful during the design process. However, even the smartest simulation tool depends significantly on the input parameters, such as the solar irradiance. As a result of the given considerations a new method for estimating the solar field size as a function of the solar irradiance is proposed. Additionally, this paper demonstrates a path to simulate the complexity of a parabolic trough power plant.

scholarly journals APPLICATION THE BASIC CONCEPTS AND LAWS OF METHAMATICS IN THE FIELD OF MODERN TECHNOLOGY

2020 ◽  
Vol 2020 (1) ◽  
pp. 43-48
Author(s):  
N Khudoyberdiyev ◽  
◽  
N Tolipova
Keyword(s):  
Power Plant ◽  
Kinetic Energy ◽  
Modern Technology ◽  
Circuit Diagram ◽  
Fluid Distribution ◽  
Mathematical Formula ◽  
Basic Concepts ◽  
The Given

This article we will discuss the mathematical formula and basic terms specific to engineering practitioners. Mathematics can solve a given problem quickly and easily in the form of a definition, even if it is used as an integral or matrix. In this article, it can be tried to apply the advanced portion of the mathematics matrix to the generation of electricity, i.e.by adding various additions and notes to the given circuit diagram, we can identify the current matrix.Several physical bodies, such as conical cushioning objects, were used to calculate the kinetic energy produced by rotating axes and to provide precise integrative methods for determining fluid distribution in power plant construction.When addressing various parts of mathematics, such as mechanics, physics and engineering, integrative calculus is called continuously of mathematics. The reasons for integrating the integrated kangi into practice are, first, the opposite of integral differentiation, and second, integral cohesion coefficient and threshold.This article mainly illustrates the ways in which problems can be solved in a very comprehensive way.

scholarly journals PREDICTOR-BASED SELF TUNING CONTROL OF POWER PLANT

2006 ◽  
Vol 35 (3) ◽  
Author(s):  
Vytautas Kaminskas ◽  
Danguolė Janickienė
Keyword(s):  
Power Plant ◽  
Control Systems ◽  
Power Plants ◽  
Nuclear Reactor ◽  
Minimum Variance ◽  
Control Algorithms ◽  
Design Problems ◽  
Digital Control Systems ◽  
Self Tuning ◽  
The Given

Design problems of predictor-based self tuning digital control systems for power plants are discussed. Investigation results for self-tuning control algorithms for a nuclear reactor are presented. These algorithms provide the minimum variance of power deviations from the given trajectory in transition and stationary regimes of operation.

Thermal and Economic Considerations for Optimizing HRSG Design

2002 ◽  
Author(s):  
Akber Pasha ◽  
Andrew S. Ragland ◽  
Suichu Sun
Keyword(s):  
Power Plant ◽  
Heat Recovery ◽  
Major Part ◽  
Combined Cycle ◽  
Time Constraints ◽  
Steam Generators ◽  
Combined Cycle Power Plant ◽  
Total Plant ◽  
The Given ◽  
Economic Considerations

The design, operation and usage of Heat Recovery Steam Generators (HRSG) has undergone considerable changes in the last 30 years. Nowadays, instead of as an option item, HRSGs are a major part of the Combined Cycle Power Plant. This makes it necessary to optimize the design and operation of the HRSG so that it can be integrated with the total plant. However, because of the complexity, it is not always feasible to evaluate all possible configurations for selecting the most optimum one within the given time constraints. An attempt is made here to present the parametric effect of various variables through descriptive graphs. These graphs are developed for general cases but can be applied to specific cases to give the trend rather than the absolute values. Cycle designers can use those to narrow down the cycle HRSG configurations. Plant operators may be able to use these to improve the performance by simple additions or modifications.

Mechanical Properties of Sintered of Al-5.5Zn-2.5Mg-0.5Cu PM Alloy

2014 ◽  
Vol 794-796 ◽  
pp. 501-507 ◽  
Author(s):  
Haris Rudianto ◽  
Jang Kwang Joo ◽  
Yang Sang Sun ◽  
Kim Yong Jin ◽  
Ivo Dlouhy
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
Compaction Pressure ◽  
X Ray Diffraction ◽  
Compaction Process ◽  
Nitrogen Gas ◽  
X Ray ◽  
T6 Heat Treatment ◽  
Strength Based

In this research, Al-5.5Zn-2.5Mg-0.5Cu was investigated. Compaction pressure at 700 MPa was carried out to make green body materials. Strong interlocking between particles is expected after high compaction process. Sintering of aluminum composites powder is sensitive to the humidity. High purity nitrogen gas was used to sinter this material from 560o-585°C for 1 hour. Sintering density increased with increasing sintering temperature and reached 96% relative sintering density at 580°C. Mechanical properties investigation of this material was done with hardness and tensile test. At optimum sintering conditions, this material has 40 HRB hardness and 329 MPa tensile strength. Based on chemical composition, this material has possibility to improve mechanical properties by T6 heat treatment. Strengthening precipitates such as MgZn2 and CuAl2 were expected as results from T6 heat treatment. Mechanical properties improved with this treatment with reaching 513 MPa of tensile strength. SEM, DSC-TGA and X-Ray Diffraction were used to characterize this material.

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