Estudo comparativo entre duas lâmpadas de descarga de baixa pressão: análise de viabilidade econômica

Abstract

The current search for lighting efficiency on building projects has involved constructors, engineers and architects to look for reliable information which fits different available light sources. This study presents analytical data about light sources, more specifically the post-fluorescent period, limiting this research on low pressure discharge lamps, given the widespread use of this light source in the environments today. Thus, the main objective of this study is to present a comparison between the fluorescent lamps and the cold cathode lamps concerning its efficiency and the eventual retrofit benefits. Considering both peculiar characteristics calculates economic index as Payback, NPV and IRR and also presents argumentsto investor’s decision covering initial costs, operation costs and maintenance of the lighting systems. All analysis was meant by the illumination and energetic efficiency values obtained by the different manufacturer’s data for its appliance. And, as a preliminary result, there is greater economic viability for the cold cathode in some applications, mainly due to its longer life spam and low power consumption, making the return on the initial investment next to 3.4 years with return rates on 30,51% for one of the conditions adopted.