Multi-objective optimization of organic Rankine cycles for waste heat recovery

An exergetic and economic optimisation of gas turbines exhaust heat recovery on offshore platforms is performed to identify optimal approaches to produce heat and power. Four different configurations are presented, with heat delivery at ۳ heat demand levels and power production by an organic Rankine cycle (ORC). The results indicated that R۱۲۳ outperforms toluene as a working fluid. For high heat demand (QproC=۱۲ MW), the series configuration with R۱۲۳ is the most suitable choice, as it provides a better balance between power production and investment cost compared to other options. For medium heat demand (QproC=۸ MW), the parallel configuration with a preheater and R۱۲۳ is optimal, while for low heat demand (QproC=۴ MW), the parallel configuration with a preheater and recuperator using R۱۲۳ is most appropriate.

کلیدواژه ها:

Offshore platforms ، Waste heat recovery ، Cogeneration ، ORC ، Genetic algorithm ، Exergy