Steady-state modeling of a phase-shift PWM parallel resonant converter

Purpose - To derive an analytical model for a dc-ac-dc parallel resonant converter operating in lagging power factor mode based on the steady-state operation conditions and considering the effects of a high-frequency transformer

STAKEHOLDER OPINION-BASED COMPARISON OF LIFE CYCLE ENVIRONMENTAL IMPACTS OF ELECTRICITY GENERATION IN TURKEY WITH SELECTED EUROPEAN COUNTRIES

The life cycle environmental impacts of electricity generation in Turkey were compared to those of Denmark, France, and Poland. The reason for selecting these particular countries for benchmarking was the fact that electricity generation in these countries is dominated mostly by a single source, that is wind, nuclear, and coal, respectively. OpenLCA software and European Life Cycle Database database were used, CML2001 method was employed. The life cycle analysis approach was from cradle to grave. The environmental impact criteria which were studied were acidification, global warming potential, depletion of abiotic resources – elements, depletion of abiotic resources - fossil fuels, eutrophication, freshwater aquatic ecotoxicity, human toxicity, marine aquatic ecotoxicity, ozone layer depletion, photochemical oxidation, and terrestrial ecotoxicity. In addition to comparing the four countries in terms of these individual impacts, the overall environmental impact scores for all countries were calculated, once with equal weights for all impacts and once with weights which were determined by acquiring the stakeholder opinions via an online questionnaire. In both cases, Poland turned out to have the highest environmental impact due to the high share coal in the electricity mix, and Turkey came second after Poland. Equal-weight-analysis returned Denmark as the country with the cleanest electricity generation infrastructure whereas stakeholder-weight-analysis results showed that it was France who had the lowest environmental impact. This result was attributed to the high weight of global warming potential and France’s nuclear-energy-based electricity generation system has a very low global warming potential when compared to other three countries. It was concluded that the prospective addition of nuclear energy, solar energy, and clean coal technologies into Turkey’s electricity mix shall reduce the overall environmental impact of electricity generation in Turkey significantly

Data for: ENVIRONMENTAL LIFE CYCLE ASSESSMENT OF YOGHURT SUPPLY TO CONSUMER IN TURKEY

Life Cycle Assessment of Yoghurt Production in Turkey - 9 separate models (CCaLC2 files) - The results file (in MS Excel format

Data for: ENVIRONMENTAL LIFE CYCLE ASSESSMENT OF OLIVE POMACE UTILIZATION IN TURKEY

result and CCaLC filesTHIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV

Data for: ENVIRONMENTAL LIFE CYCLE ASSESSMENT OF UTILIZING STEM WASTE FOR BANANA PRODUCTION IN GREENHOUSES IN TURKEY

All the scenario files (CCaLC) and overall result file (MS Excel)THIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV

Data for: ENVIRONMENTAL LIFE CYCLE ASSESSMENT OF YOGHURT SUPPLY TO CONSUMER IN TURKEY

Life Cycle Assessment of Yoghurt Production in Turkey - 9 separate models (CCaLC2 files) - The results file (in MS Excel format)THIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV

MODELING AND OUTPUT POWER OPTIMIZATION OF A WIND TURBINE DRIVEN DOUBLE OUTPUT INDUCTION GENERATOR

In the paper, a double output induction generator (DOIG) driven by a wind turbine is studied. The reference frame model of the system including a fully controlled rectifier on the rotor side is derived. Based on this model, the steady-state equations are obtained in terms of the stator and rotor currents, rotor voltage and the slip. These equations are solved both with a model of a wind turbine and that of a DHC motor driving the DOIG. The results are compared with experimental ones. Finally, an optimisation problem is formulated to investigate the conditions of transferring maximum power from the wind turbine to the grid system, and it is shown that using a DOIG in either subsynchronous or supersynchronous modes, it is possible to transfer maximum power to the network in a wide range of wind speeds without exceeding the ratings of the induction generator