Complementary solar–geothermal heat integration for sustainable multigeneration in high renewable-potential regions: Machine learning–based optimization and dynamic modeling


Khaliq A., Algarni A. D., Ahmed M., Singh P. K., Mukhitdinov O., Madaminov S., ...Daha Fazla

Applied Thermal Engineering, cilt.293, 2026 (SCI-Expanded, Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 293
  • Basım Tarihi: 2026
  • Doi Numarası: 10.1016/j.applthermaleng.2026.130430
  • Dergi Adı: Applied Thermal Engineering
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC, DIALNET
  • Anahtar Kelimeler: CSP–geothermal integration, Dual-loop organic flash cycle (DLOFC), Geothermal–solar trigeneration system, Hybrid desalination (MED–HDH), PEM electrolyzer hydrogen production
  • İstanbul Gelişim Üniversitesi Adresli: Evet

Özet

The increasing demand for low-carbon energy, freshwater, and clean fuels has intensified the need for integrated renewable multigeneration systems capable of efficiently utilizing complementary energy resources. This study investigates a coupled geothermal–solar trigeneration configuration designed to enhance thermo–exergo–economic performance under realistic deployment conditions. The proposed hybrid system integrates a concentrated solar power tower, a geothermal dual-loop organic flash cycle, a proton exchange membrane electrolyzer, multi-effect distillation, and a humidification–dehumidification desalination unit to simultaneously produce electricity, freshwater, and hydrogen. A comprehensive thermodynamic, exergy, and economic modeling framework is developed, and data-driven surrogate models based on artificial neural networks are integrated with a genetic algorithm to identify optimal operating strategies under multiple objectives. The results demonstrate that coordinated utilization of solar and geothermal energy can achieve favorable system-level exergy efficiency and economic performance. A structured multi-criteria site-selection analysis incorporating solar irradiance, geothermal potential, geological characteristics, and infrastructure factors identifies Al Lith, Saudi Arabia, as the most suitable deployment location. Dynamic annual simulations for the selected site highlight the system's capability to deliver stable multi-product outputs under realistic seasonal conditions. The findings underline the potential of integrated geothermal–solar trigeneration systems as a viable pathway for sustainable energy, water, and hydrogen production in regions with strong renewable resource complementarities.