Renewable Energy Generation Using a Novel Geothermal-Solar Hybrid Power Plant Using RORC
Authors: Ramya K. C. Ramya , Sheeba Rani S. , Sivaranjani S. , Kumar R. Vinoth 
Published: March 2023

A recent survey of energy consumption indicates that there has been
exponential growth in the need for renewable energy and also for curbing the growth of
fossil fuel reserves. To meet this future need, renewable energy sources are being
explored. In this paper, we have proposed a Recuperative Organic Rankine Cycle that
operates in conjunction with air-cooled condensers. Solar energy is said to be an energy
source that varies periodically, unlike geothermal energy which is available round the
clock, to generate electricity continuously. Hence it is a highly recommended source to
meet the growing demands for electricity globally. A major contribution to geothermal
power development is the progress in Organic Rankine Cycles. These plants are best
known for their ability to curb harmful gas emissions, especially that of non condensable gases. There is a significant growth in geothermal power owing to the
ORC (Organic Ranking Cycle) power units that are implemented. In this methodology,
the working fluid of ORC is made to go through an evaporator where a hot turbine is
used to heat the liquid. In this process, the temperature of the preheated liquid is further
increased with the aid of solar energy. This heat generated thus is further converted into
electricity when the turbine unit causes the expansion of the fluid. Finally, an air cooled condenser is used to condense the final exhaust of the turbine. Combining the
two powerful forms of renewable energy (solar and geothermal), it is possible to
generate power in such a way that the need for power begins to drop from its peak that
it has achieved already. The simulated results define the decline in energy consumption
of condensers based on the minimum heat transfer area of the condenser as well as the
minimum power consumption of the fans.A recent survey of energy consumption indicates that there has been
exponential growth in the need for renewable energy and also for curbing the growth of
fossil fuel reserves. To meet this future need, renewable energy sources are being
explored. In this paper, we have proposed a Recuperative Organic Rankine Cycle that
operates in conjunction with air-cooled condensers. Solar energy is said to be an energy
source that varies periodically, unlike geothermal energy which is available round the
clock, to generate electricity continuously. Hence it is a highly recommended source to
meet the growing demands for electricity globally. A major contribution to geothermal
power development is the progress in Organic Rankine Cycles. These plants are best
known for their ability to curb harmful gas emissions, especially that of non condensable gases. There is a significant growth in geothermal power owing to the
ORC (Organic Ranking Cycle) power units that are implemented. In this methodology,
the working fluid of ORC is made to go through an evaporator where a hot turbine is
used to heat the liquid. In this process, the temperature of the preheated liquid is further
increased with the aid of solar energy. This heat generated thus is further converted into
electricity when the turbine unit causes the expansion of the fluid. Finally, an air cooled condenser is used to condense the final exhaust of the turbine. Combining the
two powerful forms of renewable energy (solar and geothermal), it is possible to
generate power in such a way that the need for power begins to drop from its peak that
it has achieved already. The simulated results define the decline in energy consumption
of condensers based on the minimum heat transfer area of the condenser as well as the
minimum power consumption of the fans.
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