Corrosion prediction of galvanized steel ground electrodes in the soil of Timisoara

The organization of fire protection in the context of current legislation involves identifying the financial resources at each institution or economic operator for the purchase of protective equipment, initial training of first-intervention teams and specific instructions needed to save employees in the event of fires or explosions . In order to succeed in such situations, rescuers from work must acquire certain skills, and training sessions must be organized in conditions as close as possible to real conditions.

Due to its great risk on buildings, improving the characteristics of expansive soil is a large concern in the field of civil engineering. On an other hand, valuing of industrial waste has become an urgent need to reduce the damage on both of the public health and the environment. The aim of this study is to evaluate the utility of Coal slurry and fly ash located in Bechar, Algeria on expansive soil stabilization. There is many researches use fly ash as stabilizer, in contrast of coal slurry. In the present work, the mixture of bentonite and sand is stabilized by the coal slurry and fly ash. An experimental program is realized to examine the effects of coal slurry and fly ash on particle-size analysis, the free swell, swell pressure, plastic index and surface area. The soil samples are prepared with three proportions of coal sterile and fly ash (4%, 8% and 12%). The results acquired are very encouraging and they show that the effect of coal slurry and fly ash on the geo-technical properties of expansive soils is very important.

Given that in recent years air pollution is considered to be one of the most complex and serious problems caused by civilization, which has a massive impact on human health, we want to highlight the degree of pollution in urban environments in Romania. This conclusion focused on the monitoring of pollutant concentrations such as NOx, O3 and PM10 during September 2018. The results show that there have been many exceedances of the annual limit. It is also presented the diagram of the minimum and maximum values of the pollutant concentrations and which is the most affected city of the studied ones.

In this paper is presented the physical model and mathematical approach which describe the equation system used in system calibration and design optimization. The system proposed for study is built from heat pump, for energy demand delivery, together with auxiliary heating source to face in all low temperature days, when heat pump work at maximum load but the required demand by the building is higher. The paper present few of the common used systems in market for which the mathematical equation system will be proposed to come in help designers for in simulation and cost optimization. Simulation of proposed design is realized and results are delivered. The system construction, is optimized by comparison study of design and simulation data for each system type proposed. The comparison study is used for cost estimation of system and energy balance.

The paper contains an analysis of the dynamic thermal behavior of the walls made of BCA type blocks. The walls separate a room where a fire occurs that evolves after the standard ambient temperature curve of the outdoor environment characterized by a temperature of about 20o C. The wall is made up of two different areas in terms of properties, namely the field area (the central area of the blocks) and the area between the blocks, where the material is adhesive mortar for building blocks. The paper presents the theoretical bases that govern the non-linear thermal transfer non-stationary process in the wall of BCA blocks and briefly describes the automatic simulation technique for monitoring the development of the heat transfer process in the mass of the wall. The results obtained are presented tabularly and graphically so that you can have a synthetic image on them.

This article aims to analyze the modeling of fires by three possible methods of introducing HRR (Heat Release Rate): constant or with linear or exponential growth and decrease . In all cases the total amount of energy introduced is the same. The comparative analysis of the three methods give us information about the effect of the method we used for modeling fires. Watching how the temperature evolve to one point we concluded that the results are quite different. The three types of source lead to different maximum temperatures, lead to different average temperatures but also different times of appereance of temperatures to which the human body is irreparably affected.

The knowledge of the thermal conductivity properties of concrete is essential in studying the behavior of concrete at high temperatures. This knowledge is so essential to feed the thermal behavior patterns and correctly simulate the temperature field developing in a concrete element in any type of heating. In this context, this work aims to follow the influence of the nature of the granulate on the evolution of the thermal conductivity of epoxy-based concretes. The experimental results obtained show that the mineralogical nature of the granulate great affects the conductivity of the concrete.

This paper proposes a method of increasing the energy efficiency of a wind power system, SEE, consisting of a wind turbine, TV and a synchronous synchronous generator with permanent magnets, GSMP, at variable wind speeds over time. The maximum power of TV, PTV (?), is obtained when operating at the mechanical angular velocity, VUM, optimum, ?OPTIM, the value of which depends directly on the wind speed. Electricity obtained over time ?t from an EEA depends on the two basic functional sizes: 1) Wind velocity values, V, in the time interval ?t, and 2) VUM, ?, respectively its variation over time. The fundamental problem in achieving the maximum energy efficiency at time t is to correlate the current VUM value ? with the value of the wind speed at that time. By measuring two basic sizes: wind speed V and current VUM, ?, the possibility of capturing a maximum wind energy in the EEA from the MinAna-Dobrogea area is analyzed. To perform at the MPP maximum power point, the current VUM must be OPTIM.