Thermoeconomic cost evaluation of hydrogen production driven by binary geothermal power plant

Yilmaz C., Kanoglu M., Abusoglu A.

GEOTHERMICS, cilt.57, ss.18-25, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 57
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1016/j.geothermics.2015.05.005
  • Dergi Adı: GEOTHERMICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.18-25
  • Anahtar Kelimeler: Geothermal energy, Binary cycle, Hydrogen production, Electrolysis, Exergoeconomics, SPECO, ENERGY, HEAT
  • İstanbul Teknik Üniversitesi Adresli: Hayır

Özet

Thermodynamic analysis and exergy based cost formation of hydrogen production by a water electrolysis process powered by a binary geothermal power plant is performed. The exergetic cost formation process is developed applying the specific exergy cost method (SPECO). For a geothermal resource temperature of 160 degrees C and a geothermal flow rate of 100 kg/s, hydrogen gas can be produced at a rate of 0.0253 kg/s in the electrolyzer. This corresponds to 0.253 g of hydrogen production per kilogram of geothermal water. Thermoeconomic cost analysis reveals that the unit exergetic costs of electricity and hydrogen produced in the system are 6.495 $/GJ (or 0.0234 $/kWh) and 19.7 $/GJ (or 2.366$/kg H-2), respectively. (C) 2015 Elsevier Ltd. All rights reserved.