Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
ANALYSIS OF A SOLAR/BIOMASS HYBRID POWER PLANT IN PARAIBA CITIES, BRAZIL
Submission Author:
Beatriz Ribeiro Petrucci Padilha , PB
Co-Authors:
Beatriz Ribeiro Petrucci Padilha, Michelli Gomes, Adriano Marques, TAYNARA LAGO
Presenter: Beatriz Ribeiro Petrucci Padilha
doi://10.26678/ABCM.COBEM2023.COB2023-0744
Abstract
The energy perspective in the world-historical stage indicates the development of societies due to fossil fuels. They were the reason for revolutions in the industrial and urbanization sectors. On the other hand, the most significant socio-environmental impacts are related to the strong dependence on oil and its derivatives. Fossil fuels have huge polluting potential when burned and for being located in regions with political conflicts. Renewable energy sources are an alternative to diversifying the energy matrix of countries because they are related to energy generation with low levels of polluting gases. In this context, hybrid plants from renewable sources using solar energy and biomass are presented as an alternative. It takes advantage of the performance of solar collectors in periods of a high incidence of direct solar radiation. Biomass in the hybrid plant is used as a solution to the problem of solar intermittency since it will act in times low yield of solar collectors. This work aims to evaluate the thermodynamic parameters of a hybrid solar/biomass plant in Brazil. The study was applied in three cities: João Pessoa, Coremas, and Santa Luzia, located in Paraiba. Ultimately, to determine the town where the hybrid plant has the best overall efficiency. Engineering Equation Solver (EES software) performed the thermodynamic equations. At the same time, SAM software was applied to define the solar characteristics of each region, such as the Direct Normal Irradiation (DNI) parameter that indicates the portion of solar radiation absorbed by the solar collectors. The hybrid plant of this work consists of a water/steam, air, and gas circuit, operating in a simple regenerative steam Rankine cycle with Parabolic Trough Collectors (PTC) and sugarcane bagasse biomass. The plant dimensioning for each city occurs from the strategic choice of the DNI of a representative day to determine the mirrored area necessary for the installation of the collectors. The results show that the cycle thermal efficiency is flat at 26.53% due to constant total heat supply per unit mass of steam irrespective of sharing. The maximum plant fuel efficiency reached 31.84% with hybridization. The hybrid plant efficiency decreases from 15.92% (with only biomass) to 14.16% (with biomass and solar). The Coremas city presented the best hybrid plant efficiency. This research can intensify studies related to hybrid concentrated solar power (CSP)-biomass plants to reduce dependence on fossil fuels and increase the diversification of the Brazilian energy matrix.
Keywords
Biomass, concentrated solar power, Hybrid Plant, renewable energy, Solar Energy
