فصلنامه فن آوری صنعت آب و برق
سال یکم شماره 1 (1387)

More and more measurement devices are implemented in sewer networks for various purposes. Selecting sections for conducting these measurements may prove difficult, as the efficiency of available devices strongly based on hydraulic conditions. The current research project uses numerical and experimental investigations in order to improve the representativeness of the measurements performed in high diameter circular sewer by taking into the specificities of each particular site Our purpose is to create an aid for designing the instrumentation of sewer sections. This paper presents an application for investigating the influence of a bend on velocity fields and its implications on flow measurements relying on velocity sensors.

Japan is one of the pioneers of energy management. At a glance, statistics illustrate the efficiency of energy management in Japan industries. In this case, energy management plans of this country can be used as scale in other countries such as Iran. One of the major reasons of successful energy management system in Japan is position of energy manager, who has an important role in energy management system. In this paper, the energy manager position in Japan industry and energy law was considered. Furthermore, it also considered the quantity, employing, training, and evaluation method of energy managers and energy management staffs in Japan. In the end, the present position of energy manager in energy law of Iran was considered and it is recommended that, applying the Japans experiences in this field use in energy law of Iran.

Carbon Fiber Reinforced plastic (CFRP) can be bonded to the tension face of reinforced concrete beams to increase the flexural capacity. In this type of beams, high interface shear stress may result in debonding of plate and premature failure in concrete beam. To design of these beams failure mechanism and relationships between external load and shear stress distribution at concrete / plate interface must be considered. In this paper we present different premature failure mode and introduce the method to determine average of shear stress at interface.

Communication approaches in high voltage power substations have been on great evolution in recent years. automation systems in high voltage substations transfer digital data via different protocols to upper-hand levels. using these systems make control and monitoring systems work much more effective. In other hand using substation automation systems needs investing more amount of money in comparison with substations with conventional control and protection subsystems. this paper includes a quiet complete analysis on substituting this sort of high voltage substation called 'DCS substitutions 'with conventional ones, both from technical and economical points of view

The necessity to reduce pollution due to greenhouse gases، make combined cycle power plants one of the best choice to produce energy، because of their high efficiency and the use of low carbon content fuels. Also، combined cycle power plants allow meeting the growing energy demand with the least fuel consumption. Thus it is of great interest to define a strategy for the optimization of these systems، in order to get greater performances and efficiency from them. The main object of this article، is research about the effect of pressure of high and low pressure steam on different parameters of ccpp، especially on performance values.