http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/13725 2026-04-23T06:58:29Z http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/13808 Energy Saving and Solution Proposals Compressors and Electric Motors Atiç, Serdal Many countries are dependent substantially on outside financial sources. Ever-growing energy need indicates significant problems which would be seen on energy in the future. Today, consumers have to use energy in more productive way. Even if it is an advantage to obtain energy by different sources , it has got a great importance t use existing energy in saving. From this point of view, improvements related to the productive usage of energy in industry facilities which energy is mostly consumed and the productivity studies should be started. Studies related to energy saving can be made on electric motors and compressors which are mostly used especially in industry facilities with energy productivity policies which will be applied. So energy productivity is provided in industry field in many countries and also these countries' competitive capacity can be increased with developed countries as the current costs' are decreased. Thus, aforementioned countries' foreign-source dependency can be reduced in energy. 2016-01-01T00:00:00Z http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/13807 Modelling and analysis of line-to-line short circuit fault in 154 kV high-voltage substation Rüstemli, Sabir; Demir, İlter; Akdağ, Mustafa In this study line-to-line short circuit currents that are likely to happen in 154 kV Van (a city at the east of Turkey) Substation are modelled by MATLAB Simulink program with actual parameters. Lines, power transformers, circuit breakers, and loads which are the main components of a substation are modelled under MATLAB/ Simulink. Actual parameters are used for simulation. In case of power transformer modelling calculations are done by taking factory test reports as a base and power transformer block parameter values are found. Load parameter values are taken from electricity meter in the substation. Since 154 kV Van substation is modelled alone, the effect of interconnected system is modelled by an ideal voltage source. 2016-01-01T00:00:00Z http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/13806 Solar Radiation and Temperature Effects on Agricultural Irrigation Systems Palta, Olcay; Cengiz, Çiğdem; Kaynaklı, Metin Day by day water resources in the world are getting shortened and agricultural lands are gradually getting dry. Water extraction for agricultural purposes in the regions far away from the electric network, brings extra costs. In the regions that are close to the electric network, high electric bills are encountered. In irrigation systems, cost-efficient and high performance power generation is possible thanks to the solar energy. When parameters such as the quantity of water and the well height required are known, costefficient agricultural irrigation can be achieved by proper pump selection. In this study; dynamic change realized on daily and annual basis was researched for off-grid photovoltaic pump system (PVPS) that is attached to photovoltaic (PV) panels. In this system, PV panels are directly attached to the pump that feeds a tank placed high above. According to the measurements performed in the application area, Malatya province; analyzes were carried out on solar radiation, change of temperature, electrical efficiency and pump water flow. Months that had similar solar radiation and temperature values, were gathered under three different groups. That is, instead of monthly data, months that were of similar nature, were named as the Warm period, Lukewarm period and Cold period. In consequence of the study, major changes were observed in the system flow and efficiency throughout the day. Therefore, it was determined that designing any PVPS application according to daily average values without investigating the dynamic process, would cause performance decrease and additional costs. 2016-01-01T00:00:00Z http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/13805 Providing Cost Save by Using Electronic Meters in Residental Areas Kocaman, Behçet In our country, the demand for electrical energy, which is a development indicator, is increasing day by day. Due to the limited energy resources to meet this growing demand for energy it is not only able to meet the increasing production. Therefore, the current system of electricity generation, transmission and distribution used more efficiently that is electrical energy saving has become very important today. For energy saving, advanced clock application and use of electronic meter such administrative precaution and the correction of power factor such technical precaution. The most important administrative precaution to reduce the use of energy at the most consumed period and hours is to apply a higher price rate at these hours. Thus, by shifting the cosumption at these hours to other suitable hours, a balanced energy consumption may be obtained. The measurement and billing of electric energy used within the day at different times are done by means of electronic meters. In this study, it explained how to achieve saving through the use of electronic meter and suggestions were made. 2016-01-01T00:00:00Z