Showing papers in "International Journal of Heat and Technology in 2013"

Development of dye sensitized solar cells: A life cycle perspective for the environmental and market potential assessment of a renewable energy technology

Abstract: Thanks to the research and development for achieving a larger distribution, many photovoltaic technologies are available in the market presently. Those accepted as \"conventional\" are well along in the process of commercialization while those classified as \"new generation\" photovoltaics are at an early stage of industrialization as of yet. To the latter category belong the non-conventional technology of dye sensitized solar cells. Since their first assembling at the beginning of the 1990s, these devices have attracted much interest and have been extensively investigated, because of their ease for assembling of readily available materials and the employment of well-established processes. So far, many configurations have been developed, tested and reported in literature. Each of them is based on the improvement and/or replacement of one or more components of a single solar cell: the substrate, the semiconductor, the dye, the electrolyte and the counter electrode. The efficiency of dye sensitized solar cells at lab scale is now comparable with amorphous silicon photovoltaics technology, but with much more potential than silicon for performance improvements and for becoming a cost-effective means for electricity production. In spite of these favourable aspects, dye sensitized solar cell prototypes for large scale production are not yet sufficiently efficient to be industrially competitive. In this study, we present an environmental sustainability overview of the principal dye sensitized solar cell configurations proposed to select the proper set of materials suitable for improving their performances. This is done on the basis of data published in literature, pre-industrialization tests by several companies and lab data obtained through the Fotosensorg Project. The analysis will be integrated with considerations on the potential for a larger distribution and competition of dye sensitized solar cells with presently available solar electric technologies on the photovoltaic market. DEVELOPMENT OF DYE SENSITIZED SOLAR CELLS: A LIFE CYCLE PERSPECTIVE FOR THE ENVIRONMENTAL AND MARKET POTENTIAL ASSESSMENT OF A RENEWABLE ENERGY TECHNOLOGY Maria Laura Parisi, Simone Maranghi, Adalgisa Sinicropi, Riccardo Basosi Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Via A. Moro 2, 53100 Siena,

Messina's historical buildings after the earthquake of 1908: Energy and environmental analysis through a global screening metodology

Abstract: Messina’s historical heritage rebuilding after the earthquake of 1908 was almost exclusively directed both to ensure the static safety of structures and casings and giving new dignity through a rich aesthetic language and preserving the historical identity of the urban fabric. This approach did not keep into account all the buildings energetic response and the optimization of occupants comfort. From here, the need to prepare swift and exhaustive methodology of analysis of the building performance level both in terms of conservative asset than energy performance. Once you have identified the overall criticalities through the monitoring campaign, the scenery is enriched by data derived from indoor comfort perception, obtained by administering an appropriate survey. In this paper it was analyzed the Palazzo dei Leoni’s energy vulnerability, the current seat of the Province of Messina, subject of reconstruction in 1914 after the earthquake and chosen as a case study. The validity of the suggested screening methodology lies in potential applicability to any fine building , subject to postconflict or post-seismic, needing an energy retrofit, supported by a preliminary investigation of the building’s potential decays performance and of the level of indoor comfort.