Thermoeconomic assessment and optimization of wells to flash–binary cycle using pure R601 and zeotropic mixtures in the Sibayak geothermal field

Felix Pratama, Nadhilah Reyseliani, Ahmad Syauqi, Yunus Daud, Widodo Wahyu Purwanto, Praswasti P.D.K. Wulan, Akhmad Hidayatno

Research output: Contribution to journalArticle

Abstract

In this study, a flash–binary cycle is proposed with the pressure and energy loss from well to power plant are quantified in the Sibayak geothermal field. The reservoir deliverability curve is simulated using WellSim. The cycle is simulated with various zeotropic mixtures as the working fluid of the organic Rankine cycle (ORC) using Honeywell UniSim Design and optimized in terms of maximum NPV and maximum power output using Genetic Algorithm. The optimization shows that pure R601 as the ORC working fluid resulting USD 29,224,825 NPV and 27.88 MW power equivalent to 6.23 % exergy efficiency improvement compared to single flash. The integration system shows 0.73-0.93 bar pressure loss and 0.53 MW energy loss due to the consideration of pipeline system that is equal to 0.23 Cents/kWh electricity price overestimation.

Original languageEnglish
Article number101778
JournalGeothermics
Volume85
DOIs
Publication statusPublished - May 2020

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Geothermal fields
Rankine cycle
Energy dissipation
well
Fluids
Exergy
Power plants
exergy
Electricity
fluid
Pipelines
Genetic algorithms
genetic algorithm
energy
power plant
electricity
loss

Keywords

  • Flash-binary cycle
  • Optimization
  • Pipelines
  • Sibayak geothermal field
  • Zeotropic mixtures

Cite this

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title = "Thermoeconomic assessment and optimization of wells to flash–binary cycle using pure R601 and zeotropic mixtures in the Sibayak geothermal field",
abstract = "In this study, a flash–binary cycle is proposed with the pressure and energy loss from well to power plant are quantified in the Sibayak geothermal field. The reservoir deliverability curve is simulated using WellSim. The cycle is simulated with various zeotropic mixtures as the working fluid of the organic Rankine cycle (ORC) using Honeywell UniSim Design and optimized in terms of maximum NPV and maximum power output using Genetic Algorithm. The optimization shows that pure R601 as the ORC working fluid resulting USD 29,224,825 NPV and 27.88 MW power equivalent to 6.23 {\%} exergy efficiency improvement compared to single flash. The integration system shows 0.73-0.93 bar pressure loss and 0.53 MW energy loss due to the consideration of pipeline system that is equal to 0.23 Cents/kWh electricity price overestimation.",
keywords = "Flash-binary cycle, Optimization, Pipelines, Sibayak geothermal field, Zeotropic mixtures",
author = "Felix Pratama and Nadhilah Reyseliani and Ahmad Syauqi and Yunus Daud and Purwanto, {Widodo Wahyu} and Wulan, {Praswasti P.D.K.} and Akhmad Hidayatno",
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AU - Pratama, Felix

AU - Reyseliani, Nadhilah

AU - Syauqi, Ahmad

AU - Daud, Yunus

AU - Purwanto, Widodo Wahyu

AU - Wulan, Praswasti P.D.K.

AU - Hidayatno, Akhmad

PY - 2020/5

Y1 - 2020/5

N2 - In this study, a flash–binary cycle is proposed with the pressure and energy loss from well to power plant are quantified in the Sibayak geothermal field. The reservoir deliverability curve is simulated using WellSim. The cycle is simulated with various zeotropic mixtures as the working fluid of the organic Rankine cycle (ORC) using Honeywell UniSim Design and optimized in terms of maximum NPV and maximum power output using Genetic Algorithm. The optimization shows that pure R601 as the ORC working fluid resulting USD 29,224,825 NPV and 27.88 MW power equivalent to 6.23 % exergy efficiency improvement compared to single flash. The integration system shows 0.73-0.93 bar pressure loss and 0.53 MW energy loss due to the consideration of pipeline system that is equal to 0.23 Cents/kWh electricity price overestimation.

AB - In this study, a flash–binary cycle is proposed with the pressure and energy loss from well to power plant are quantified in the Sibayak geothermal field. The reservoir deliverability curve is simulated using WellSim. The cycle is simulated with various zeotropic mixtures as the working fluid of the organic Rankine cycle (ORC) using Honeywell UniSim Design and optimized in terms of maximum NPV and maximum power output using Genetic Algorithm. The optimization shows that pure R601 as the ORC working fluid resulting USD 29,224,825 NPV and 27.88 MW power equivalent to 6.23 % exergy efficiency improvement compared to single flash. The integration system shows 0.73-0.93 bar pressure loss and 0.53 MW energy loss due to the consideration of pipeline system that is equal to 0.23 Cents/kWh electricity price overestimation.

KW - Flash-binary cycle

KW - Optimization

KW - Pipelines

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KW - Zeotropic mixtures

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