An analysis of the applications of Analytic Hierarchy Process (AHP) for selection of energy efficiency practices in public lighting in a sample of Brazilian cities

Abstract

In Brazil, the public lighting sector is a responsibility of the municipal government and typically represents around 4% of the electricity consumed by cities. Considering the significant importance and functions of this service, sustainable management is necessary. The aim of this paper is to investigate the main practices used worldwide in terms of energy efficiency of public lighting and propose the use of the multi-criteria method called Analytic Hierarchy Process to choose the best options for a group of Brazilian cities, namely Passo Fundo, Santa Maria and Porto Alegre. The methodology of this paper consists of searching for best practices in public lighting, which worked as alternatives for applying the Analytic Hierarchy Process. The final step consisted of presenting the impacts of a potential implementation, through analysis of energy and financial savings. The results suggest the preferred practices to each municipality (Audit and Guide Elaboration, Retrofit, Alternative Energy and Management) and their potential implementation can promote energy and financial savings up to 6 GWh/year and 600,000.00 US$/year. The main implications of this paper are related to proposing the use of a multi-criteria method to the public lighting sector and providing useful insights for local governments and especially for developing countries.