Banca de DEFESA: MYLENA VIEIRA PINTO MENEZES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MYLENA VIEIRA PINTO MENEZES
DATE: 19/07/2022
TIME: 10:00
LOCAL: videoconferência na plataforma RNP (sala PEI-UFBA)
TITLE:

THERMODYNAMIC AND ECONOMIC ANALYSIS OF A NEW CONFIGURATION FOR LIQUEFIED AIR ENERGY STORAGE PLANTS (LAES) USING AIR CRYOGENIC RANKINE CYCLE (ARC).

KEY WORDS:

Liquid air energy storage; Cryogenic Rankine cycle; Round-trip effi-ciency; Exergy analysis; levelized cost of storage.

PAGES: 93
BIG AREA: Engenharias
AREA: Engenharia de Produção
SUMMARY:

Liquid air energy storage system (LAES) is one of the most promising large-scale energy tech-nologies presenting several advantages: high volumetric energy density, low storage losses, and an absence of geographical constraints. The disadvantages of LAES systems lay on the high investment cost and low round-trip efficiency. This work proposes a new configuration using an air Rankine cycle (ARC) to reduce the exergy destruction during heat-exchanging in the liquefaction process while reducing liquefaction power consumption, thus enhancing the round-trip efficiency. In addition, this work assesses two different LAES configuration, with and with-out energy integration, comparing them with the new configuration proposed. The round-trip efficiency of the LAES with the addition of the ARC reached 57.1%, whilst the liquid air yield achieved is 90.7%. The results from the new configuration proposed reveal that the increase in the yield of liquid air is more important to the overall efficiency than the power that is generated by the Rankine itself. The results from exergy analysis show that the overall exergy destruction of the new configuration compared to the simple LAES plant and LAES with energy integration is decreased by 44.8% and 2%, respectively. Furthermore, the effects of compression, storage, and pumping pressure on the new configuration performance are investigated by parametric analysis. From an economic viewpoint, the proposed system has a better economic performance than the LAES system with energy integration, decreasing the levelized cost of storage (LCOS) by almost 2%. The proposed configuration may improve the performance and economic com-petitiveness of LAES systems.

BANKING MEMBERS:
Externo à Instituição - Osvaldo José Venturini - UNIFEI - UNI
Interna - 112.573.775-15 - GLORIA MEYBERG NUNES COSTA - UFBA
Presidente - 2058938 - JULIO AUGUSTO MENDES DA SILVA