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Main Results of an Energy Audit in a Milk Processing Industry in Taquara,Southern Brazil

Journal of Power and Energy Engineering 2018年第1期6卷 21-32页

作者： Rejane G.Goncalves Elton G.Rossini José de Souza Alexandre Beluco Universidade Federal de Pernambuco (UFPE) Recife PE Brazil Universidade Estadual do Rio Grande do Sul (UERGS) Porto Alegre RS Brazil fundacao liberato salzano vieira da cunha Novo Hamburgo RS Brazil Universidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre RS Brazil

The industrial energy diagnosis presented in this work occurred in a milk product cooperative, from an analysis of energy consumption in the main milk industrialization and a diagnosis of energy end uses of lighting and cooling systems. Almost all stages of milk industrialization are used hot water and steam generated in the boilers. The largest electricity consumption in this sector is by electric motors followed by cooling needed to maintain the quality of milk products. Because energy costs represent a significant portion of the monthly cost of the company, an analysis of the energy costs of the past two years to check the consumption of active and reactive energy and power demand contracted is performed. This paper presents the main results of an energy audit in a milk processing industry in southern Brazil.

关键词： Energy Audit Energetic Efficiency Milk Products Industry

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A Hydro PV Hybrid System as a New Concept for an Abandoned dam in Southern Brazil

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Computational Water, Energy, and Environmental Engineering 2019年第2期8卷 41-56页

作者： Gabriel Vasco Jones S. Silva Alexandre Beluco Elton G. Rossini José de Souza Instituto de Pesquisas Hidráulicas Universidade Federal do Rio Grande do Sul Porto Alegre Brazil Universidade Estadual do Rio Grande do Sul Porto Alegre Brazil Fundaç o liberato salzano vieira da cunha Novo Hamburgo Brazil

The search for alternatives to traditional sources of electric energy opens the way for a new market in the world, and for Brazil in particular. Still in its first steps, but with immense potential, the generation of energy from solar irradiation and hydroelectric plants in hybrid systems is an important alternative. On the other hand, single source power systems, when designed to meet a particular demand without fail, lead to low market acceptance due to the availability of resources and low efficiency in performance that rewards high initial investment costs. One solution to balance and optimize energy supply is the use of more than one energy resource when sources can be complementary. Among several possible combinations reported in several studies, the hybrid photovoltaic hydroelectric system is considered to be an optimal and interesting combination. In this context, the present article makes a technical and economic pre-feasibility analysis of a hydroelectric photovoltaic hybrid system, operating photovoltaic panels on floating structures on the water surface to allow the use of the Laranjeiras dam. The study was conducted based on simulations with HOMER. The solution indicated as optimal was the installation of a hybrid energy system, implementing a hydroelectric power plant at the base of the dam, with 1497 kW of installed capacity, operating simultaneously with a set of photovoltaic modules, on the water surface of the dam, with 180 kW of installed capacity, and a power limit for the purchase and sale to the grid equal to 400 kW, to supply the demand of consumer loads up to 40 MWh per day. This combination would result in an initial cost of US$3984.885 per kW and an energy cost of US$0.026 per kWh.

关键词： Hybrid Systems Energetic Complementarity PV Modules on Floating Structures Pre-Feasibility Study Software Homer

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Influence of Time Complementarity on Energy Storage through Batteries in Hydro PV Hybrid Energy System

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Computational Water, Energy, and Environmental Engineering 2018年第3期7卷 142-159页

作者： Frederico A. During Fo Alexandre Beluco Elton G. Rossini José de Souza Universidade Federal do Rio Gramde do Sul Instituto de PesquisasHidráulicas Porto Alegre RS Brazil Universidade Estadual do Rio Grande do Sul Porto Alegre RS Brazil Fundaç ã o liberato salzano vieira da cunha Novo Hamburgo RS Brazil

The notion of energetic complementarity can be a tool for energy resource managers to prioritize energy generation projects based on renewable resources in both interconnected and independent systems. As a tool in decision-making, it is important to know better the influence of energetic complementarity on the performance of hybrid systems especially with regard to energy shortages but also in relation to other parameters. In recent years, hydro PV hybrid systems have become a growing target of researchers and designers for the idea of installing photovoltaic modules on the water surface of reservoirs. Energetic complementarity has three components: time-complementarity, energy-amplitude and amplitude-complementarity. This paper is dedicated to the study of the influence of time-complementarity on the storage of energy through batteries in hydro PV hybrid systems. The method applied is in the literature and suggests the simulation of the system under study with the idealization of energy availabilities, to remove the effects of climatic variations and the characteristic intermittency of renewable resources. Simulations were performed with the well-known software Homer. The results provided the variations of the states of charge of the batteries as a function of different time-complementarities, indicating as expected better performances associated to higher time-complementarities. The results indicated that the cost of energy for a hybrid system with 28 batteries was equal to US$ 0.502 per kWh and that this cost increased as the time complementarity between energy resources moved away from the situation corresponding to full complementarity. The simulations also showed that the maintenance of the zero failure condition supplying the demands of the consumer loads requires that the load be reduced to 52% if the complementarity is reduced from the full complementarity to zero complementarity, with the cost of energy going from US$ 0.502 per kWh to US$ 0.796 per kWh. Th

关键词： Energetic Complementarity Time Complementarity Hybrid Systems Hydro Power PV Power Hydro PV Hybrid Systems

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A Hydro PV Hybrid System for the Laranjeiras dam (in Southern Brazil) Operating with Storage Capacity in the Water Reservoir

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Smart Grid and Renewable Energy 2019年第4期10卷 83-97页

作者： Gabriel Vasco Jones S. Silva Fausto A. Canales Alexandre Beluco José de Souza Elton G. Rossini Instituto de Pesquisas Hidráulicas Universidade Federal do Rio Grande do Sul Porto Alegre Brazil Departamento de Ingeniería Civil y Ambiental Universidad de la Costa Barranquilla Colombia Fundaç ã o liberato salzano vieira da cunha Novo Hamburgo Brazil Universidade Estadual do Rio Grande do Sul Porto Alegre Brazil

Seasonal variability coupled with the intermittency of renewable energy sources makes reservoir hydroelectric plants an interesting option to consider in hybrid energy systems, especially in cases of dams that have not been completed or have been abandoned and which still have some potential for reuse. The Laranjeiras dam was completed in the 1960s and the original project for hydroelectric power generation was not completed, made impossible by economic changes during the construction years. A recent study proposed the implementation of a hydroelectric photovoltaic hybrid system with lower horsepower to allow the dam to be made useful again. This paper presents the results of the computational simulations with the software Homer, considering the operation of the hydroelectric component (of the proposed hybrid system) with reservoir, playing the role of energy storage device when the production exceeds the demand at a given moment, reducing the loss of energy due to unavailability of demand. The study suggested to implement a hydroelectric power plant with power house at the base of the dam that has a height of 20 m, operating at a minimum flow of 9171 L/s, with reservoir operating as a device for energy storage, operating with a photovoltaic system of 360 kW, and a power limit for the purchase of energy from the grid equal to 200 kW, providing consumer loads up to 40 MWh per day, with cost of energy equal to US$0.021 per kWh and a capital cost of US$3285.617.

关键词： Hybrid Systems Energetic Complementarity PV Modules on Floating Structures Pre Feasibility Study Software Homer

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