Análise da viabilidade econômica com sensibilização de variáveis para substituição de condicionadores de ar convencional por tecnologia inverter na Biblioteca Pública de Foz do Iguaçu

Abstract

In this work, it is compared the economic feasibility and energy consumption of two types of compressors used in air conditioners: the conventional and the inverter. It was verified the behavior of both appliances, the energy expenditure, highlighting the electric power consumption of the compressor. The place chosen for a test is a public library in the Municipality of Foz do Iguaçu, in the state of Paraná. An evaluation consisted of the elaboration of scenarios and sub-scenarios that simulate an exchange of devices, immediately or after their useful live. It was also analyzed the use of own or outsourced labor, the time of operation of the compressor and the economy provided by the inverter system. The economic viability has been verified for each sub-scenario and it has been concluded that an exchange is not interesting while the device is working properly. The obtained data is analyzed and compared using economic indicators such as: Payback, Internal Rate of Return (IRR) and Net Present Value (NPV). However, it is recommended that equipment be exchanged when the conventional conditioner compressor works for a period of time of not less than 50% of the use of the appliance or when the inverter system has an economy of not less than 30%, I.E., when the IRR is Positive, the Payback less than 48 months and maximum NPV of R$ 179,602.61.