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Split flow principle implementation for advanced subcritical double stage organic rankine cycle configuration for geothermal power production

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  • Mustapić, N.
  • Kralj, Toni
  • Vujanović, Milan

Abstract

The main goal of research is to find the most suitable combination of working fluids, for double stage Organic Rankine Cycle configurations which ensure maximum net power output for low to medium enthalpy geothermal sources with temperatures from 120 °C to 180 °C. All obtained results are compared with the values obtained in simple Organic Rankine Cycle configuration. In general, it can be concluded that the highest net power output is produced by the double stage Organic Rankine Cycle configuration in the geothermal temperature interval from 120 °C to 132 °C. In the geothermal fluid inlet temperature interval from 143 °C to 180 °C double stage Organic Rankine Cycle configuration achieves the highest net power output values at 150 °C, 160 °C, 170 °C and 180 °C and that 40,93 (kW) with a combination of working fluids R236fa/R1234yf (high temperature stage/low temperature stage), 49,85 (kW) with R236ea/R227ea, 59,03 (kW) with R236ea/R227ea and 69,40 (kW) with n-Butane/R1234ze(E). In the temperature interval from 132 °C to 142 °C all considered configurations achieve similar values of net power output.

Suggested Citation

  • Mustapić, N. & Kralj, Toni & Vujanović, Milan, 2024. "Split flow principle implementation for advanced subcritical double stage organic rankine cycle configuration for geothermal power production," Energy, Elsevier, vol. 303(C).
    • Handle: RePEc:eee:energy:v:303:y:2024:i:c:s0360544224016438
    DOI: 10.1016/j.energy.2024.131870
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    References listed on IDEAS

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