sulfuric acid production plants are one of the main sources of sulfur oxides, emission to the atmosphere. in the present study to control sulfur oxides of sulfuric acid plant two methods have been selected. the first method is desulfurization by ammoniac (plant a) and the second one is a combination of the first method and dry scrubbing process with calcium hydroxide as the absorbent material) ...

The Snowy Mountains Hydro-electric Authority has recently undertaken a program of analysing the routine maintenance completed on its main generation and hydraulic assets. Power industry deregulation and increasing competition have created the need to reduce costs while increasing productivity. Along with downsizing and organisational restructuring, considerable effort has been placed on improvi...

The fleet assignment problem is an integral part of the airline planning process. Given a schedule of international flights and certain maintenance criteria required by the Federal Aviation Administration (FAA), the objective of the long haul fleet assignment problem is to assign aircraft of different fleet types to different flights such that operating costs are minimized. We develop a new for...

Maintenance is an important way to ensure the best performance of repairable systems. This paper considers how reduce system maintenance cost while ensuring consistent performance. Due budget constraints, preventive (PM) can be done on only some components. Also, different selections components maintained have markedly effects On basis above issues, this proposes importance-based priority (IBMP...

Evaluation of system maintenance and improvements of turbogenerators allow to obtain and to evaluate a complete picture of each plant and the results obtained to build a program of action and develop priority actions, implementation of which will in turn raise the level of operating turbogenerators and increase their reliability. Each local area will allow a more concrete form to make control o...

This paper defines an objective economic index, which integrates both investment and fixed and variable operating costs of a wastewater treatment plant. The main objective is to standardize a cost calculation procedure, to be able to compare different treatment scenarios. The development of the cost criterion may be specific to each particular case, especially to assess variable operating costs...

In this research study, energy, exergy and economic analyses is performed for a combined cycle power plant (CCPP) with a supplementary firing system. The purpose of this analyses is to evaluate the economic feasibility of a CCPP by applying an optimization techniques based on Evolutionary algorithms. Actually, the evolutionary algorithms of Firefly, PSO and NSGA-II are applied to minimize the c...

1.0 Features of Standard AC Motors The squirrel cage induction motor is the electrical motor motor type most widely used in industry. This leading position results mainly from certain excellent features of the squirrel cage motor such as: • Uncomplicated, rugged construction. For the user this means low initial cost and high reliability. • Good efficiency coupled with low maintenance costs resu...