EXERGETIC OPTIMIZATION OF PHOSPHORIC ACID FACTORY POWER PLANT

Year 2017, Volume: 3 Issue: 5, 1428 - 1441, 19.09.2017

Khir Tahar

https://doi.org/10.18186/journal-of-thermal-engineering.338898

Abstract

An
Energetic and Exergetic Analysis is conducted on a Steam Turbine Power Plant of
an existing Phosphoric Acid Factory. The heat recovery systems used in
different parts of the plant are also considered in the analysis. Mass, thermal
and exergy balances are established on the main components of the factory. A
numerical code is established using EES software to perform the calculations
required for the thermal and exergy plant analysis. The effects of the key
operating parameters such as steam pressure and temperature, mass flow rate as
well as seawater temperature, on the cycle performances are investigated.

The
minimum Exergy Destruction Rates are obtained for the condensers and deaerators
followed by the blowers and turbines. The Steam Turbine Generator STGI presents
the maximum irreversibility rates of about 4.1 MW. For the explored ranges of
HP steam pressure, the energy efficiencies of steam turbine generators STGI and
STGII increase of about 1.37 % and 8.8 % respectively. While the exergy
efficiencies increase of about 2.46 for STGI and 6.8 % for STGII. In the same
way optimum HP steam flow rate values, leading to the maximum exergy
efficiencies are defined.

Keywords

Condenser, Energy Efficiency, Exergy Efficiency, Phosphoric Acid Plant, Steam Turbine Generator

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