scholarly journals Performance Analysis of Coal Cleaning Operations: Relationship Between Probable Error in Separation and Organic Efficiency Performance Analysis of Coal Cleaning Operations: Relationship Between Probable Error in Separation and Organic Efficiency

2021 ◽  
Author(s):  
Subha Ranjan Paul ◽  
Sumantra Bhattacharya
Keyword(s):  
Performance Analysis ◽  
Performance Measures ◽  
Separation Efficiency ◽  
Selection Criterion ◽  
Probable Error ◽  
Plant Design ◽  
Clean Coal ◽  
Coal Cleaning ◽  
Cleaning Equipment ◽  
Efficiency Performance

Abstract Separation efficiency of coal cleaning equipment is typically assessed by Probable Error in Separation (Ep) and Organic Efficiency (Eorg). The first one is determined on the basis of precise cut point density of separation and implies that for ideal separation the error is zero. The second one is calculated on the basis of yield of clean coal/ middling at the target ash and implies that for ideal separation the efficiency is 100%. Plant operators worldwide being accountable for the tonnage of the clean coal and middling produced regularly monitor Eorg with some application in plant design in India. Ep is universally used as an equipment selection criterion from among the vendors, in commercial contracts and sometimes for performance analysis of coal cleaning equipment carried out at the plants. Since both are performance measures there should possibly be a relationship between the two for specific cleaning equipment or for a particular type of density separators. Such relationships are however rarely observed. Moreover there are many instances where high to very high Eorg does not translate into low to very low Ep. Therefore, is there a dichotomy between the two performance measures?

scholarly journals Optimized Traffic Grooming through modified PSO based Iterative Hungarian algorithm in Optical Networks

2021 ◽  
Vol 50 (3) ◽  
pp. 546-557
Author(s):  
J. KUMARNATH ◽  
K. BATRI
Keyword(s):  
Performance Analysis ◽  
Optical Networks ◽  
Performance Measures ◽  
Shortest Path ◽  
Optical Network ◽  
Traffic Grooming ◽  
Pso Algorithm ◽  
Propagation Delay ◽  
The Other ◽  
Modified Pso

Due to huge size of the data and quick transmission of data between the nodes present in the optical network, a condition of network traffic is created among the nodes of the network. This issue of traffic can be overcome by employing numerous traffic grooming techniques. In this research paper, the best suitable shortest path is determined by the multi objective modified PSO algorithm and an innovative visibility graph based Iterative Hungarian Traffic grooming algorithm is implemented to reduce the blocking ratio through improving the allocation of bandwidth between the users. Then finally the performance analysis is carried out by means of performance measures such as traffic throughput, transceivers count, average propagation delay, blocking ratio, and success ratio. It can be inferred that the proposed work obtains enhanced outcomes when compared to the other existing techniques.

Evaluation of Public Information Systems

2013 ◽  
pp. 135-159
Keyword(s):  
Information Systems ◽  
Performance Analysis ◽  
Performance Measures ◽  
Public Information ◽  
Business Case ◽  
Cost Performance ◽  
Business Plans ◽  
Alternative Approaches ◽  
Public Information Systems ◽  
Risk Cost

Evaluation is a key element in preparation of the business case for an IT project. Business plans include discussion of costs and benefits, performance measures, progress milestones, assessment of risk, cost estimates for alternatives, and general justification for the advocated alternative. Approaches to evaluation range from the qualitative and general to the quantitative and specific. As identified in the chapter, evaluation activities may include comparisons of the agency with “best practices,” development of performance measures and benchmarks, and cost-performance analysis.

scholarly journals Application of the Thermodynamic Cycle to Assess the Energy Efficiency of Amine-Based Absorption of Carbon Capture

Energies ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2504 ◽  
Author(s):  
Yaofeng Xu ◽  
Shuai Deng ◽  
Li Zhao ◽  
Xiangzhou Yuan ◽  
Jianxin Fu ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Performance Analysis ◽  
Carbon Capture ◽  
Large Scale ◽  
Variable Parameter ◽  
Thermodynamic Cycle ◽  
Co2 Concentration ◽  
Parameter Analysis ◽  
Industrial Systems ◽  
Efficiency Performance

The thermodynamic cycle, as a significant tool derived from equilibrium, could provide a reasonable and rapid energy profile of complicated energy systems. Such a function could strongly promote an in-depth and direct understanding of the energy conversion mechanism of cutting-edge industrial systems, e.g., carbon capture system (CCS) However, such applications of thermodynamics theory have not been widely accepted in the carbon capture sector, which may be one of the reasons why intensive energy consumption still obstructs large-scale commercialization of CCS. In this paper, a kind of thermodynamic cycle was developed as a tool to estimate the lowest regeneration heat (Qre) of a benchmark solvent (MEA) under typical conditions. Moreover, COPCO2, a new assessment indicator, was proposed firstly for energy-efficiency performance analysis of such a kind of CCS system. In addition to regeneration heat and second-law efficiency (η2nd), the developed COPCO2 was also integrated into the existing performance analysis framework, to assess the energy efficiency of an amine-based absorption system. Through variable parameter analysis, the higher CO2 concentration of the flue gas, the higher COPCO2, up to 2.80 in 16 vt% and the Qre was 2.82 GJ/t, when Rdes = 1 and ΔTheat-ex = 10 K. The η2nd was no more than 30% and decreased with the rise of the desorption temperature, which indicates the great potential of improvements of the energy efficiency.

scholarly journals Performance analysis of ATM multiplexer with Bernoulli traffic sources

2002 ◽  
Vol 8 (6) ◽  
pp. 541-552
Author(s):  
Shu-Yin Chiang
Keyword(s):  
Performance Analysis ◽  
Performance Measures ◽  
Asynchronous Transfer Mode ◽  
Simplified Models ◽  
Transfer Mode ◽  
Atm Multiplexer

In this paper, we study the simplified models of the ATM (Asynchronous Transfer Mode) multiplexer network with Bernoulli random traffic sources. Based on the model, the performance measures are analyzed by the different output service schemes.

scholarly journals Determining the Separation Performance of the Knelson Concentrator

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Ozcan ONEY ◽  
Selcuk SAMANLI
Keyword(s):  
Flow Rate ◽  
Water Flow Rate ◽  
Separation Performance ◽  
Optimal Parameters ◽  
Optimal Test ◽  
Clean Coal ◽  
Fine Coal ◽  
Coal Cleaning ◽  
Test Parameters ◽  
Knelson Concentrator

This study was aimed at determining the separation performance of the Knelson concentrator in Zonguldak fine coal (-1+0.15 mm). The experiments were carried out in the Knelson concentrator under the following optimal parameters determined in previous studies; water flow rate of 3.14 L/min., bowl speed of 459 rpm, solids ratio of 23.87%, and feed flow rate of 1.50 L/min. A series of tests were conducted at optimal test parameters to obtain enough samples for float and sink analysis. Clean coal and tailing products were subjected to float and sink analysis. Based on this analysis, partition curve for coal cleaning process was generated. The cut-point of the separation was obtained at the specific gravity of 1.72 [g/cm3]. The probable error (Ep) value, which signifies the efficiency of the process, was calculated as 0.11 These results indicated that Knelson concentrator is very effective in separating fine coal.

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