Ahmet Duran Şahin

TL;DR: The quantification of energy and material flows for the world’s 27 megacities with populations greater than 10 million people as of 2010 is a major undertaking, not previously achieved and largely consistent with scaling laws established in the emerging science of cities.

TL;DR: In this article, the authors reviewed wind energy history, wind-power meteorology, the energy-climate relations, windturbine technology, wind economy, wind hybrid applications and the current status of installed wind energy capacity all over the world reviewed critically with further enhancements and new research trend direction suggestions.

TL;DR: In this article, an Artificial Neural Networks (ANNs) methodology is applied to data obtained from a 750-W power capacity of solar PV panel and the main objective of this paper is to determine time horizon having the highest representative for generated electricity prediction of small scale solar power system applications.

TL;DR: In this article, the first-order Markov chain method was used for estimating the wind speed in the northwestern region of Turkey and the transition matrix approach was used to generate the synthetic wind speed time series.

TL;DR: In this article, the thermodynamic characteristics of solar photovoltaic (PV) cells are investigated from a perspective based on ex-ergy, and a new efficiency is developed that is useful in studying PV performance and possible improvements.