GIS estimated potential of rooftop PVs in urban areas - case study Wrocław (Poland)

Paweł B Dąbek,Jakub Jurasz,D Słyś,J Dziopk

doi:10.1051/e3sconf/20184500014

Abstract

The authors attempted to determine the amount of a roof's surface required for the installation of PVs panels, in terms of the type of building, roof shape, slope, exposition and potential shading of the structure. The area selected for the study was the city of Wrocław, Poland. Photovoltaics are perceived to be a viable option for reducing the environmental impact of energy production while simultaneously increasing local energy security. Exploiting the potential of cities in generating energy from photovoltaics is increasingly evident; in particular, to provide the individual needs of cities, estates or buildings. Due to the diversity of the construction of buildings' roofs, as well as the impact of neighbouring buildings, determining the technical potential at the stage of preliminary analyses is necessary. For these aims, it seems almost obvious to use high-resolution LiDAR data and a GIS spatial analysis. The LiDAR data in the form of a classified points cloud (12 pt/m2) and the Database of Topographic Object from which information on the building class was taken was used. A digital surface model of roofs with a spatial resolution of 1 m was created from the LiDAR data. A slope and a roof exposition models were created, and the roofs were finally counted in 90 categories. The authors have also analysed the conditions for the shading of their own and neighbouring objects with regard to the vertical and horizontal angle of the sunlight for Wrocław, Poland, on characteristic dates: the March and September equinox, the summer and winter solstice, and analysing the period from 8 am to 4 pm in one hour intervals. Analyses of the available areas were made regarding the building's class.

Highlights

IntroductionThey create opportunities for progress in various areas, and contribute heavily to the degradation of the local and global environment
The analysis considers solar conditions, including the vertical and horizontal angle of sunlight on four characteristic dates of the year: the March equinox (March 21), the summer solstice (June 22), the September equinox (September 23) and the winter solstice (December 22)
BDOT was developed in 2012–2013, but based on topographic maps made in the 1990s and orthophotomaps made in recent years

Summary

Introduction

They create opportunities for progress in various areas, and contribute heavily to the degradation of the local and global environment. The volume of goods, especially the energy consumed in cities (in a relatively small area), is so immense that this environmental burden [1] cannot remain neglected, especially in the context of observed climate changes [2]. Cities consume various forms of energy, the majority of which is generated in distant power plants and processing facilities. *. © The Authors, published by EDP Sciences.

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