Estudo dos principais métodos de proteção contra descargas atmosféricas, projeto e aplicação no pavilhão central do Parque Científico e Tecnológico da UTFPR – Cientech Medianeira

Abstract

The western region of Paraná has one of the highest incidences of lightning strikes in Brazil, making the implementation of adequate protection systems essential in strategic buildings, such as the central pavilion of the UTFPR Science and Technology Park – Cientech Medianeira. The central pavilion, called the Center for Entrepreneurship and Innovation (CEI), is a metal structure that houses a photovoltaic power plant on its roof with a nominal power of 75 kW and an installed power of 98.48 kWp. Considering this reality and the absence of a lightning protection system (LPS) in the building, a comparison was made between the main lightning capture methods foreseen in NBR 5419:2015, such as Faraday Cage, Protection Angle Method (Franklin), Electrogeometric Method (Rolling Sphere), and ionizing systems, the latter not recognized by NBR 5419. The technical, normative, and functional analysis indicated that the rolling sphere method is the most appropriate for application to the building structure. The proposal development involves a risk analysis based on the protection level of existing surge protection devices (SPDs) at the building's power input and the protection level defined by NBR 5419, aiming to protect people and equipment. The project considered all procedures established in NBR 5419:2015, subsequently presenting a technical and economic analysis, as well as the quantity of materials and their respective values based on the SINAPI table. Furthermore, an executive design for the lightning protection system was prepared, with details and technical representations for its subsequent execution.