Prof. Aimé Lay-Ekuakille
University of Salento, Italy
Talk: Advances in Spectrophotometry for Characterizing Pollutants within Environmental Networks
The main objective of absorption spectrophotometer is to identify and characterize the gaseous or liquid analyses depending on their different interaction with used luminous radiation. There are several possible application fields of designed spectrophotometer, from gaseous pollutants detection, indoor air quality monitoring in particular environments as surgery rooms (where presence control of some gaseous components or dust is mandatory), detection of possible leaks and room climate deterioration, up to food quality control which characteristics depend on numerous components such as water, fat, proteins and carbohydrates. We specifically introduce the implementation of spectrophotometric measurements using LED technology as radiation source.
Prof. Aimé Lay-Ekuakille is with the Department of Innovation Engineering, University of Salento (Italy). He works on the field of instrumentation and measurements related mainly to biomedical and environmental applications. Sensors and nanotechnology are also a niche of his research. He has authored and co-authored around 215 papers published on international journals and proceedings, and 5 books. He currently serves as Associate Editor of IEEE Sensors Journal, Measurement - Elsevier, and International Journal of Smart Sensors and Intelligent Systems. He is also the Chairman of Imeko TC19, and IEEE IMS TC34.
Associate Prof. Pedro M. Rodrigo
Faculty of Engineering – Universidad Panamericana
Talk: Indexes for quantifying the spectral coupling of atmosphere and photovoltaic system performance
Photovoltaic system performance is affected by changes in the input sunlight spectrum. Moreover, the different photovoltaic materials employed show different spectral responses, having different spectral behavior as a result. Many authors have developed methods and proposed indexes for quantifying the spectral influences in photovoltaic systems under the time-varying weather variables. These methods use different equipment, different procedures and assumptions, present different levels of complexity and accuracy, and have advantages and disadvantages in each specific context and application.
The indexes for quantifying the spectral coupling of atmosphere and photovoltaic system performance can be classified into photovoltaic device-independent indexes and photovoltaic device-dependent indexes. The first category implies that the index does not make use of any physical property of the analyzed photovoltaic device. In the second category, several properties of the analyzed device, such as the Spectral Response, are considered. Photovoltaic device-dependent indexes can be defined depending on the photovoltaic technology, the main differentiation being between non-concentrating flat-plate photovoltaic devices and concentrating devices. Concentrating devices use optical elements to concentrate the sunlight onto small high-efficiency solar cells.
An analysis of the available spectral indexes reveals that the choice of a suitable index depends on the specific application and its context. There are four key factors to be evaluated before the selection of a spectral characterization method: the analyzed PV technology, the required instruments, the availability of information on PV device spectral response and the required accuracy. Instruments such as spectroradiometers, short-circuit current meters or spectroheliometers (isotype cells), combined with reference pyranometers or pyrheliometers, are commonly used for the spectral evaluation of photovoltaic devices.
Pedro M. Rodrigo is an Associate Professor and Researcher at the Faculty of Engineering of Universidad Panamericana, Aguascalientes, Mexico. He received the MSc degree in Industrial Engineering from Universidad de Navarra (Spain) in 1998 and the PhD degree in Electronic Engineering from Universidad de Jaén (Spain) in 2013. From 2009 to 2014, he was a Research Assistant with the Centro de Estudios Avanzados en Energía y Medio Ambiente (CEAEMA) and with the Investigación y Desarrollo en Energía Solar y Automática group (IDEA) at Universidad de Jaén (Spain). His current research interest includes the characterization of concentrator photovoltaic and flat-plate photovoltaic systems.