The Importance of Optimal Design in Outdoor Light Source Positioning

In this work we underline the importance of the optimal design for outdoor light systems such that light posts and sources are placed correctly. We present a case study where we considered a city road section equipped with LED sources. On this section, we measured technical luminous coefficients, which were then compared with values listed in standard and normative documentation. Based on this we did a new design that had to follow certain requirements on street and lighting post configuration. Comparing the two designs we conclude that, to have an optimal street light system, the engineer must aim for the best possible design and consider this when deciding on the position of the light sources

Optimizing Structural Dimensions and Costs of a Synchronous Generator Depending on the Current Blanket

Optimal structural dimensions and reduced costs are current requirements in electrical machines. Such requirements can be fulfilled already in the design phase by establishing optimal parameter and quantities values, such that the objective function is satisfied. The main optimization variable of this work is the current layer, the resulting optimal values and the charts analyzed here are obtained using a specific program for optimal design. This program is based on the classical design of the synchronous generator. Depending on the aimed objectives the program returns the values of the dimensions of interest. Using an optimal design, for the generator in question, costs have decreased with 4.7% compared to the classical design costs

On the Electromagnetic Stress Impact on the Synchronous Generator Structural Dimensions and Efficiency

Structural dimensions as well as the ability to safely operate in often transient processes or short emergency situations are usual customer requirements. These requirements can be fulfilled already in the design phase by careful selection of electromagnetic stress values (current layer, air gap magnetic displacement).This work contributes to finding optimal values for the above mentioned stresses such that customer requirements are fulfille

Notes on LED Installations in Street Illumination

The paper presents a study made on choosing LED street lighting installations, such that the quality requirements for exterior artificial lighting are fulfilled. We analyze two types of LED street lighting installations from a technical point of view, together with lighting level and brightness values obtained during the measurements. Following on the field measurements, the lighting quality parameters are calculated, and, for the lighting installation with the best performance, optimal mounting suggestions are made. The optimal quality parameters are calculated by simulations using the Dialux software. The same software and the same light sources we also compute an optimal street lighting by determining the size of the installation that provides the best lighting parameter values

Optimizing Street Lighting Systems Design

This work presents solutions to improve the quality parameters for outdoor illumination. The work starts from a case study which measured the outdoor lighting quality indicators on a street of the town Reşiţa. We measured levels of lighting and brightness, and we computed various lighting indicators. The obtained values were then compared to the values recommended by actual technical norms observing that they do not fit into the normed limits. Using the Dialux software we calculated the optimal mounting variant of the lighting installation for the street under lighting analysis. In the optimizing software we kept the pole’s height and place in space constant to the values in the real situation. This work presents new variants of lighting installations that can ensure the best lighting indicators possible

On the Electromagnetic Stresses Impact on the Synchronous Generator Costs

In line with the nowadays requirements, the synchronous generators must fulfill the technical specifications and their costs should be as low as possible. For this, the electromagnetic stresses, which significantly influence the synchronous generator costs, must have optimal values. The use of optimal designs helps achieve this objective. In this work we show how the current layer A and the air gap magnetic displacement Bδ influence the generator’s costs

Technical performance analysis of a 40 kW photovoltaic installation

To reduce the consumption of classically produced electric energy, which is an important green gas pollution factor, various renewable energy sources are now implemented on larger and larger scale. Both industrial and household consumers make use of such renewable energy sources. This work presents the characteristics and performance of a 40 kW photovoltaic installation mounted on the roof of an industrial production hall. The design and the implementation of the photovoltaic installation allows it to function while connected to the local power grid. On-site measurements have shown that the installation ensures symmetric voltages and currents, functioning at the planned parameters

Rapid Calculation Program of Certain Sizes used in design of Synchronous Generators

This paper presents a program of rapid determination of certain sizes required in the design of synchronous machines using Mathcad software. During the design of electrical machines are phases in which certain sizes are extracted from different tables depending on certain variables. This operation is difficult and sometimes hard to do. To eliminate this problem and greatly shorten the time of determination of sizes and to ensure accurate values we have designed a program allowing even interpolation between two known values. The program developed applied, in this paper, to quickly determine the value of the voltage form factor kB and the value of the ideal polar coverage coefficient αi of polar step τ