Multi-criteria optimization of a new geothermal driven integrated power and hydrogen production system via a new Index: Economic sustainability (EcoSI)

ARSLAN O., Arslan A.

Fuel, cilt.358, 2024 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 358
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1016/j.fuel.2023.130160
  • Dergi Adı: Fuel
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Biotechnology Research Abstracts, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Pollution Abstracts, Civil Engineering Abstracts
  • Anahtar Kelimeler: Economic sustainability index (EcoSI), Efficiency analysis technique with output satisficing (EATWOS), Geothermal, Organic Rankine cycle (ORC), Proton exchange membrane electrolyzer (PEMEL)
  • Bilecik Şeyh Edebali Üniversitesi Adresli: Evet

Özet

This study investigates a new geothermal energy-driven hybrid system, including an organic Rankine cycle (ORC) for power generation and a proton exchange membrane electrolyzer (PEMEL) to improve the sustainability of issued geothermal energy sources. In this aim, 2400 designs were formed parametrically. The designs were optimized throughout the multi-criteria decision-making (MCDM) analysis named efficiency analysis technique with output satisficing (EATWOS). In the optimization, a new index named the economic sustainability index (EcoSI) was proposed as the objective function. EcoSI was then introduced into MCDM analysis along with the sustainability index (SI). Design 1–2-7–1-1 with a turbine inlet temperature of 100 °C and inlet pressure of 1950 kPa was determined as the optimal design. In this design, the optimal current density was determined as the minimum chosen value with 1000 A/m2. The power supply rate was determined as the minimum chosen value of 10 %. The temperatures of the production and re-injection wells were determined as 133.5 °C and 111.99 °C, respectively. The exergy efficiency and power generation rate of ORC were determined as 21.11 % and 12.113 MW, respectively. The hydrogen generation rate and exergy efficiency of PEMEL were determined as 0.0057003 kg/s and 48.76 %, respectively. The exergy efficiency of the overall system was determined as 19.92 %. The investment cost was determined as 332.57 $/h. Exergy destruction, fuel and product costs were determined at 38312.99 $/h, 48272.40 $/h, and 24240.05 $/h, respectively. The sustainability index (SI) was determined as 1.249, whereas the economic sustainability index (EcoSI) was determined as 1.260.