ISSN Online: 2379-1748
ISBN Flash Drive: 978-1-56700-517-2
5-6th Thermal and Fluids Engineering Conference (TFEC)
ENERGY AND EXERGY ANALYSIS OF A NEW COMBINED SYSTEM FOR POWER, COOLING, HEATING AND FRESHWATER PRODUCTION BASED ON GAS TURBINE
Abstract
Global energy consumption is continuously increasing in the world due to population growth and improving living standards. Also, fresh water demand is projected to increase by around 55% by 2050. Therefore, designing and developing a system utilizing a combined power cycle to produce fresh water is an attractive solution to address these needs. This paper proposes a new combined system for power, cooling, heating, and
freshwater production. A gas turbine (GT) cycle is used as the top cycle to generate power. The GT cycle's waste heat is utilized to drive two bottom cycles, a supercritical CO2 recompression Brayton cycle (SCRBC) and multi-effect desalination with thermal vapor compressor (MED-TVC) and heating system. The waste heat of the SCRBC is used to drive an absorption cooling cycle (ACC). A detailed steady-state model for the proposed system is developed using Engineering Equation Solver (EES) to perform energy and exergy analysis. Also, a parametric study is conducted to show the influence of design parameters on system performance. The results show that the proposed system's overall energy utilization factor is around 61%, and the total exergy efficiency is around 39%. The highest exergy destruction occurs in the combustion chamber,
followed by the heat recovery steam generator (HRSG) and the MED-TVC unit.
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