Abstract
The differential pricing for peak hours encourages industrial consumers to look for independent power supplies for the period from 19 to 22 hours. This paper presents a study to identify the optimal solution for a recycled paper mill that also intends to work in that period. The factory is located in Rio Grande do Sul, in southern Brazil, and considers the use of a diesel gen set, a micro hydro power plant and possibly PV modules. Two micro hydro power plants were considered in the study, an old plant to be renewed and another to be fully implemented. The software Homer was used as a tool to determine the most feasible combination of components considered in the study. The sale of surplus power to the energy system appears as a key to viability of alternatives that are not based solely on diesel generators. The optimal solution consists of a combination of diesel generators and micro hydro power plant, in one case, and only on hydroelectric power plant in another, with a significant penetration of PV modules if its cost is reduced to 12% of the current price, selling an amount of energy equal to that which is bought. The annual water availability in one of the sites requires diesel supplement, while the other, more abundant, this supplement is not necessary.
Highlights
The peak time is three to four hours of the end of the day on which the power consumption increases dramatically by matching habits of various types of consumers.This increase in consumption is traditionally fought with distinction in energy tariffs for that time, typically for the period from 19 hours to 22 hours.The reversible hydropower plants provide a greater supply of energy at peak times, made possible by the difference in prices of energy at peak times and off-peak.In Brazil, residential consumers still do not pay for more expensive energy at peak times, but the industrial consumers pay charges that may be more than six times higher than rates outside of peak hours
This paper presents a study to identify the optimal solution for a recycled paper mill that intends to work in that period
The factory is located in Rio Grande do Sul, in southern Brazil, and considers the use of a diesel gen set, a micro hydro power plant and possibly PV modules
Summary
The peak time is three to four hours of the end of the day on which the power consumption increases dramatically by matching habits of various types of consumers. In Brazil, residential consumers still do not pay for more expensive energy at peak times, but the industrial consumers pay charges that may be more than six times higher than rates outside of peak hours This differentiation forces industrial consumers to seek solutions for independent power supplies during peak hours. The search for alternative energy supplies that may be competitive with electricity tariffs valid during peak hours are an obvious opportunity for development of renewable resources Both the energies already established, such as solar and wind power and biomass fuels, as those still in development, can be employed. This paper presents a study to identify the optimal solution for a recycled paper mill that intends to work during the period from 19 to 22 hours without relying solely on the power supply provided by the grid
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