Análise de sistema de vapor de água saturado com vistas à eficiência energética

Abstract

The efficient and rational use of energy, represents significant reductions in the cost of a product or a service. The thermal input used at Apolichs do Sul Indústria e Comércio de Materiales de Polimento LTDA, company which provides services in the field of polishing and washing parts of stainless steel, is performed by saturated water vapor. Although recent, the steam generation and distribution plant does not fully contemplate maximum energy efficiency. This paper Aims to analyze a system of generation and distribution of steam, from an energy efficiency point of view. The search for solutions that contribute to the best use of the fuel, as well as the best use of the heat generated are the items that guide the paper. For this paper, were analyzed The loss of heat through a section of piping without thermal insulation and through manual bottom discharges, the influence of fuel moisture on consumption, as well as the determination of the most economical fuel for the steam generator and the feasibility of replacing heating for GLP of one of the equipment used at Apolichs do Sul Ind. e Com. de Mat. de Polimento, are the items analyzed in this paper. The solutions presented are economically justified through the Simple Payback method, highlighting the rapid return with the implementation of the same. The economic justification is the most efficient way to put an energy efficiency project into practice, since it represents real gains most of the time, It is essential for the companies to keep its products and services competitive in the market. As a result, it was found that the lack of insulation in the two-inch pipe and the bottom discharges generate an energy loss equivalent to R$ 11.903,41 per year compared to log fires. The increase in the humidity of the fuel generates an increase in the consumption representing R$ 9.969,83 of losses annual. Among the fuels analyzed, the wood chip is the one with the greatest savings for steam generation, corresponding to a reduction of R$ 42.692,88 a year. In addition, the substitution of LPG by steam, has proved viable and could generate a saving of R$ 33.705,81 a year. The Payback analysis presented a return of 5,0 months for the investment whith the replacement of LPG by steam.