Abstract

Geothermal energy is in nascent stage in India. Extracting energy from earth’s interior and converting it into power are a general practice in countries like Kenya, New Zealand, Tanzania, Mexico, Iceland, etc. India has low enthalpy subsurface regime. Power generation from earth’s internal heat is limited in India. The present study deals with a heuristic modeling technique where solar energy is hybridized with geothermal energy. To enhance enthalpy and in turn elevate power generation concentrated solar trough (CST) device is utilized. Thermodynamic models are prepared for CST-geothermal setup. CST is hybridized with geothermal energy both in series and parallel modes. The study also suggests thermal energy storage methods for uninterrupted power supply in night. The cost of the hybrid plant is 25–50% lesser compared to photovoltaic plants. The economic analysis of the proposed plant is evaluated based on energy and exergy models.

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