Performance improvement of a single-flash geothermal power plant in Dieng, Indonesia, upon conversion to a double-flash system using thermodynamic analysis

Pambudi, Nugroho Agung; Itoi, Ryuichi; Jalilinasrabady, Saeid; Jaelani, Khasani

doi:10.1016/j.renene.2015.02.025

Cited by 37 publications

(7 citation statements)

References 15 publications

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“…Energi dan Exergi adalah parameter-parameter yang berasal dari hukum termodinamika satu dan hukum termodinamika dua [10], Energi bersifat kekal dan tidak dapat dimusnahkan. Berbeda dengan energi, exergi bersifat tidak kekal yang disebakan oleh sifat ireversibelitas dari proses.…”

Section: Metode Penelitianunclassified

Analisis Thermodinamika dan Exergi pada Pembangkit Listrik Tenaga Panas Bumi Sistem Double flash yang menggunakan Interstage Heating

Hakim¹,

Mulyana²,

Faizal³

et al. 2020

JIIF

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Interstage heating merupakan suatu konsep pengembangan yang dilakukan pada pembangkit listrik sistem double flash, pada paper ini dilakukan analisis termodinamika terhadap model pemangkit double flash yang menggunakan interstage heating (Superheating, Reheating dan Mixture-heating) dengan parameter tinjauan adalah daya output dan exergi. Analisi termodinamika khususnya daya output dilakukan dengan meninjau pembangkit secara keseluruhan, sedangkan analisis exergi difokuskan pada bagian heat exchanger yang digunakan untuk interstage heating. Pada penelitian ini dilakukan variasi temperatur reservoir (180C-220C) dengan temperatur dead steate adalah 25C. Hasil dari penelitian ini memperlihatkan bahwa interstage heating dapat menjadi konsep yang konstruktif atau destruktif, konstruktif untuk tipe reheating dan mixture heating karena mengalami kenaikan daya output dan exergi, destruktif untuk tipe superheating karena mengalami penurunan daya output dan exergi, konstruktif dan destruktif ini dititik beratkan penyebabnya pada proses transfer panas yang terjadi di heat exchanger, secara keseluruhan tipe interstage heating terbaik adalah tipe mixture heating dengan kenaikan daya output rata-rata sebesar 7.6% dan exergi rata-rata sebesar 1.1% saat dibandingkan dengan sistem double flash.

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Section: Metode Penelitianunclassified

Analisis Thermodinamika dan Exergi pada Pembangkit Listrik Tenaga Panas Bumi Sistem Double flash yang menggunakan Interstage Heating

Hakim¹,

Mulyana²,

Faizal³

et al. 2020

JIIF

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“…In that analysis, the greatest exergy losses were 13.5% in the separator and 12.94% in the turbine. Using thermodynamic analysis, Pambudi et al (2015) showed that the performance of the geothermal power plant could be improved by changing from a single-flash system to a double-flash system.…”

Section: Introductionmentioning

confidence: 99%

Energy and Exergy Analysis of Dieng Geothermal Power Plant

Qurrahman¹,

Wilopo²,

Susanto³

et al. 2021

IJTech

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Energy and exergy analyses are conducted at the Dieng Geothermal Power Plant to determine the energy loss of components by calculating the efficiency, rate of change in energy flow, and exergy loss of each component. The data were collected on each component, including production wells, turbines, the main condenser, inter-condensers, and cooling towers, with the data collection occurring from April 2017 to March 2018. Energy and exergy analyses begin by calculating the enthalpy and entropy of both input and output from the compiled temperature data, with the help of a steam table. The study results show that the lowest efficiency was 67% in the turbine, and the highest energy change rate seen was 5.8×10 4 kW, in the inter-condenser. In addition, the greatest exergy loss was 50 Mw, which occurred in the turbine, indicating it was the component most in need of repair. In summary, the study results clarified that the component that needed to be treated and repaired at the Dieng Geothermal Power Plant was the turbine.

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“…Scaling and condenser temperature as constrained conditions are discussed in the double-flash geothermal power plants [10]. At present, the focus on geothermal power plant is to improve performance or modified the existing flash power plants [11]. The ORC is the typical representative of the geothermal binary power system.…”

Section: Introductionmentioning

confidence: 99%

Design and experimental research on the combined flash-binary geothermal power generation system driven by low-medium temperature geothermal system

et al. 2020

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To match for the different temperature of the geothermal resource and strengthen the flexibility of organic Rankine cycle, a variable capacity power generation superstructure based on flash and organic Rankine cycle for geothermal energy was proposed. A combined flash-binary experimental prototype is newly established to investigate thermodynamic performance both on system and equipment in this paper. Pressured hot water is adopted as the extensive worldwide existed hydrothermal geothermal resource, eliminating the influence of the used heat transfer oil on evaporating process. The experimental results show that there is an optimal mass-flow rate of R245fa under the condition of different heat source temperature. Flash and binary power subsystem dominate the flash-binary power system, respectively, when the heat source temperature is 120 ℃ and 130 ℃. The isotropic efficiency of modified compressor just between 0.2 and 0.25. The power output of per ton geofluid are 0.78 kWh/t and 1.31 kWh/t, respectively, when the heat source temperature are 120 ℃ and 130 ℃. These results will predict the operation data of flash-binary power plant driven by the low-medium temperature geothermal water for construction in western of China.

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Performance improvement of a single-flash geothermal power plant in Dieng, Indonesia, upon conversion to a double-flash system using thermodynamic analysis

Cited by 37 publications

References 15 publications

Analisis Thermodinamika dan Exergi pada Pembangkit Listrik Tenaga Panas Bumi Sistem Double flash yang menggunakan Interstage Heating

Analisis Thermodinamika dan Exergi pada Pembangkit Listrik Tenaga Panas Bumi Sistem Double flash yang menggunakan Interstage Heating

Energy and Exergy Analysis of Dieng Geothermal Power Plant

Design and experimental research on the combined flash-binary geothermal power generation system driven by low-medium temperature geothermal system

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