Análise da viabilidade econômica da implantação de tecnologia LED na iluminação interna de uma escola pública

Abstract

Since the 2000s, LED technology has been gaining ground in the indoor lighting sector of diverse environments, including schools. It has many benefits compared to the technologies used today, but its initial investment is still quite high. However, through economic analysis, generally, it is possible to make feasible the use of this technology. This paper presents an economic evaluation of the implantation of 18 W tubular LED lamps (LLTs) in place of 36 W tubular fluorescent lamps (LFTs) in a case study. The site chosen for the analysis was the EEEM Dr. Romário, located in the city of Alegrete / RS. This school is a beneficiary of the State Program for the Modernization of Electrical Installations in Public Schools, executed by SOP do RS. The analysis is divided into two cases, Case I discusses the feasibility of two alternatives, one with the replacement of new fluorescent lamps and the other with replacement with LED lamps, the current system uses tubular fluorescent lamps. In this case, the SINAPI data base of dec/2018 is used, and the costs of the civil construction components involved in the study are collected. In Case II, there is the feasibility of investing in the replacement of the current system of lighting by LED lamps. The labor costs and the components that make up an LED luminaire in Case II were obtained from the SGO 2018, used by the 10th CROP of the 4th region. It was possible to develop the research using a scientific methodology of economic analysis. Allowing that the goals sought in the project can be achieved with the proposed tools, mathematically, than with luck itself. Therefore, the present work aims to demonstrate the economic consequences, on the economic feasibility of an energy efficiency project in the illumination of a public school. Validating a calculation methodology for surveying the costs involved in the economic project. Therefore, the monetary return of the investment in the replacement of LFT by LLT is favorable, in both cases. Retrofit by LED bulbs boasts economical positive viability. Case I returns in 5 years and 2 months, and Case II in 7 years and 9 months, according to the discounted payback. The other analysis tools used also reached their respective evaluation criteria, with the NPV and the VAUE positive, and the IRR greater than the 8% TMA applied.