In the Organic Rankine Cycle, if the total solar energy absorbed per day is calculated as the Solar Direct Normal Irradiance (DNI) multiplied by the Collector Area of CSP and the Operating Hours, how can we determine the amount of energy absorbed by a Binary Cycle or Organic Rankine Cycle (ORC) from geothermal energy?
Geothermal energy has been used for power generation, space and process heating and space cooling. Some part of this energy is rarely used for cogeneration. Geothermal energy is a promising source for any heat driven applications whether involving direct or indirect thermal processes. A separation process of a geothermal fluid mixture is needed for indirect geothermal utilization, especially in power generation cycles. The separation process disposes of the liquid form of low grade thermal energy which could be utilized further for other direct and indirect utilizations such as a power plant bottoming unit, heating and cooling purposes or other heat driven processes, depending on how much of the available energy remains
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Good afternoon,
The energy absorbed by the working fluid from a geothermal source must be calculated by performing an energy balance to the working fluid, modelled as an open system with stablished boundaries (engineer's choice depending on the facility). Experimentally, this can be achieved by measuring the flow rate, temperature, and pressure of the fluid at the entrance and outlet of the system, and thus obtaining its thermodynamic properties. The net energy differente will give you the energy gained by the fluid throughout the well (note that this is not the thermal energy potential -exergy- of the geothermal well, since it constitutes a very complex system, with diffuse boundaries, and normally treated as a thermal source with infinite mass and constant temperature -although this is just an approximation-, and not all the energy provided by the well is gained by the fluid).
I hope this response would help you. Regards.
I used the mass flow rate of the ORC*(enthalpy at exit-enthalpy at inlet)