Evaluation Of Integrated Systems Research Articles

Integrated simulation system of CO2 gas injection application for enhanced oil recovery in the oil field

CO2 gas injection is one of the recommended enhanced oil recovery (EOR) methods by injecting CO2 through reservoir pores after the residual saturation is reached, since CO2 dissolves easily in oil phase as confirmed by many other researchers in pertaining field studies. An integrated system is urgently required for assessing CO2-EOR study, covering multi-disciplinary aspects as follows: geology, geophysics, reservoir, production, process and economic. Hence, those systems must be reliable in suggesting final decision for feasibility of CO2-EOR operation program, applicable either for pilot scale or for full scale. This paper is proposing an integrated system evaluation, which has the following features: (1) estimate fraction of dissolved CO2, (2) estimate viscosity reduction, (3) estimate future oil productivity index resulted, (4) forecast incremental oil production, (5) estimate surface facilities equipment design, (6) evaluate economical aspects and (7) generate final decision for feasibility of CO2-EOR operation program. Finally, as the main objective of this program, those systems will present a picture of essential reason why we need to promote or reject CO2-EOR plan program, and also some recommendations will be presented in case the CO2-EOR plan does not perform as expected.

Implementing sustainable sanitation in an integrated model – A straightforward approach for long-term simulation

At present, increasing requirements for both the efficiency and environmental sustainability of resources demand more knowledge about the feasibility of the implementation of innovative technologies both in a large-scale as well as in the long run. Even at modified sewage flows and characterizations, water infrastructures must always remain reliable to guarantee sustainable urban water management. Dimensioning methods and assessment variables must be adapted to achieve more flexible systems in the long-term. This paper aims to assess the actual impact of the implementation of New Alternative Sanitation Systems (NASS) as well as stormwater decentralization measures in an existing sewage disposal system with means of a dynamic simulation within a 50-year time interval in 10 years steps. Two scenario simulations showed that the implementation of the module for blackwater and greywater separation with an assumed pollutant fractionation represents the investigated sustainable sanitation measures reliably. Results showed a decrease in the overflow discharge loads and duration of the control stormwater infrastructures. The WWTP showed a successful chemical oxygen demand (COD) and total nitrogen elimination (TN) in all cases. Nonetheless, operational flexibility is fundamental in order to cope with the more unfavorable COD:TN ratios of the WWTP inflow after full implementation of NASS. To sum up, implementing this simplified approach for a stepwise implementation of resource-oriented sanitation technologies allows a dynamic integrated system evaluation not only for dry weather conditions but also for stormwater conditions.

Integrated system evaluation of nuclear fuel cycle options in China combined with an analytical MCDM framework

Our work is a first attempt to evaluate comprehensively the sustainability of future nuclear fuel cycle options in China based on dynamic system modeling combined with a Multi-Criteria Decision Making (MCDM) analysis. Considering six essential indicators, we developed an MCDM framework to evaluate and rank China-specific sustainability in line with the quantitative performance of four candidate options of fuel cycle transition scenarios from the existing to advanced nuclear energy systems through 2100. Four transition scenarios identified are 1) the direct disposal of PWR (Pressurized Water Reactor) spent fuel, 2) the mono-recycling of PWR spent fuel through PWR-MOX (Mixed Oxides), 3) the PWR-MOX followed by Fast Reactor (FR), and 4) the full recycling of PWR spent fuel using FR. We also further analyzed the roles of the different representatives of decision makers and their impacts on the overall ranking by applying AHP, TOPSIS, and PROMETHEE II methods from a weighting perspective. The results showed that Scenario 1 is the least sustainable and attractive fuel cycle option. Instead, Scenario 4 substantially satisfies the requirements underlying the current definition of nuclear sustainability, while remaining in line with China's closed nuclear fuel cycle policy. This strategic MCDM framework also provides flexibility to cope with the evolution and inherent uncertainties of technological development, which is conducive to identifying the trade-offs of future nuclear energy systems considered at a national level.

Імплементація комплексної системи оцінювання ефективності інноваційної діяльності підприємств будівельної галузі

Імплементація комплексної системи оцінювання ефективності інноваційної діяльності підприємств будівельної галузі

Extension Evaluation Method in the Selection of Electromagnetic Brake System

Electromagnetic brake system can make the vehicle brake effectively, there were many factors affect the system’s performance, so it was very important to find some method to evaluate the system properly. Firstly, the article introduced the concept, calculation method of the electromagnetic brake and friction brake integrated system evaluation. Through a simple example described extension assessment method in the integrated system selection evaluation, extension assessment method was applied. Finally, during the selection of multi-program evaluation, according to the index weight binding extension assessment method, we got the best selection program.

Organizational diagnosis, the stepping stone to organizational effectiveness

Organizational survival, success and effectiveness depend on the ability of the organization to adapt to continuous challenges, competition and change. However, improving and changing organizations demand properly understanding and diagnosing them. So, where does diagnosis start and how can we measure effectiveness? Diagnosis starts with assessing key tasks, structure, people relationships, motivation, support, management leadership, attitude towards change and performance to identify gaps towards effectiveness. Effectiveness is evaluated in terms of the extent to which people have the right skills and competencies and are trained and strategically managed to enhance profitability (finance), the organization’s marketing strategy, operations/service and, measurement of the corporate/business development and growth achieved as a result of planned efforts to ensure organizational viability, stability and maturity. This study uses an integrated system evaluation process to diagnose the extent to which key tasks, structure, people relationships, motivation, support, management leadership, attitude towards change and performance impact on organizational effectiveness respectively. The population for the study comprised of all staff in a provincial trade and investment promotion agency in South Africa and a consensus approach was used through a cluster sampling technique, which secured an 85.4% response rate. In this quantitative, cross-sectional study data was collected using questionnaires and analyzed using both descriptive and inferential statistics. The results reflect that the diagnostic variables impact on organizational effectiveness in varying degrees. The important diagnostic dimensions and areas for improvement are identified and suggestions for corrective action are presented in order to enhance overall organizational effectiveness.

Do Not ‘Hit and Miss’ Or ‘Spray and Pray’, Diagnose First

This quantitative, cross-sectional study uses an integrated system evaluation process to diagnose eight variables (key tasks, structure, people relationships, motivation, support, management leadership, attitude towards change and performance) that contribute to effective organisations, with the aim of identifying gaps and suggesting corrective actions. The population comprised of all staff in a provincial trade and investment promotion agency in South Africa and a consensus approach was used through a cluster sampling technique, which secured an 85.4% response rate. Data was collected using questionnaires and analysed using both descriptive and inferential statistics. The psychometric properties (validity and reliability) of the questionnaires were statistically determined using Factor Analysis and Cronbach’s Coefficient Alpha. The results indicate that employees perceive the eight elements of organisational diagnosis as having the potential to influence effectiveness in varying degrees. The element perceived to be functioning most effectively, having the least degree of shortfalls is Key Tasks, and the element requiring the greatest degree of improvement is Structure. Significant intercorrelations exist amongst these eight diagnostic variables. Based on the results of the study, strengths and areas for improvement in each of these diagnostic variables has been identified and recommendations are graphically depicted, which when effectively implemented has the potential to enhance each of the elements and overall organisational effectiveness.

Modeling, analysis and control system development for the Italian hydrogen house

This paper provides an analysis of the “Hydrogen from the Sun” project at the “Ecological House” in northern Italy. The modeling and analysis work is being performed in conjunction with the International Energy Agency Hydrogen Implementing Agreement Annex 18: Integrated Systems Evaluation. A customized library of Matlab/Simulink component models is used to simulate the system and evaluate the hydrogen economics and energy production efficiencies. Two control algorithms are developed for the house using a fuzzy logic and an adaptive control strategy. The economic and steady state effects of these two strategies are compared as are the energy sources used to supply the energy demand of the house. The hydrogen production system consists of an electrolyzer, a photo-voltaic collector, and a battery, linked to both a metal hydride and high pressure gas storage system. The hydrogen supplies a fuel cell, which powers a residential estate. The analysis shows the contribution of the different system components to the overall efficiency and cost of hydrogen. However, the control systems presented also have a significant effect on the hydrogen and electricity cost. Reduction of these costs and an increase in system efficiency require optimal use of the hydrogen stored, as well as the optimized distribution of power supply from the generating components. The analysis shows the initial cost of hydrogen to be 9.36 $/kg, with electricity produced at 0.65 $/kWh using a fuzzy logic control system at an electrical efficiency of 50% (of the full hydrogen house system), based on the lower heating value of hydrogen. The result of using an active control strategy is presented.

Special Issue: Integrated System Evaluation: A Consumer/Warfighter Perspective

Special Issue: Integrated System Evaluation: A Consumer/Warfighter Perspective

Special Issue: Integrated System Evaluation: A Consumer/War fighter Perspective

Special Issue: Integrated System Evaluation: A Consumer/War fighter Perspective