The Alternative Binary Geothermal Power-Plant Design to Utilize the Waste Heat in Lahendong Plant

Eli Kumolosari, Bahrul Jalaali, Kutut Suryopratomo, Okto Dinaryanto


The first geothermal binary system in Indonesia that has successfully implemented is a 500kW binary system in Lahendong. Yet, there is still a plenty room of improvement for binary system development in Lahendong. This study aims to give an alternative design of the binary system by using an organic Rankine cycle. The investigations of thermodynamic analysis based on the law of thermodynamics, silica scaling analysis, and optimization of working fluid selection are presented. Flashing process from separator produces vapor and liquid-brine with mass flow rates 48.6 kg/s and 173.6 kg/s at separator pressure of 10.23 bar. Based on second law thermodynamics analysis, obtained the maximum useful energy from brine flow is 7.2MW. Based on the simulation results, it is achieved that the potential power generated by waste heat from the Lahendong plant is 2.46MW with the net thermal and exergy efficiency by 11% and 34%, respectively. Compared to the current operating binary system, still, much available energy needs to be harnessed in the future from the Lahendong plant.


Geothermal, Binary Cycle, Organic Rankine Cycle

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ESDM, Statistik EBTKE 2014, Jakarta: Ministry of energy and mineral resources, 2014.

N. Saptadji, "Sekilas Tentang Panas Bumi, Materi Panas Bumi," Institut Teknologi Bandung, Bandung.

A. J. Nugroho, "Evaluation of Waste Brine Utilization from LHD Unit III for Electricity Generation in Lahendong Geothermal Field, Indonesia," in Geothermal Training Programme, Reykjavik, 2007.

Breme, "A Hydrotectonic Model of a Geothermal Reservoir-A Study in Lahendong, Indonesia,". Elsevier, 2014.

Detik (2019, January 21). Pertamina geothermal energy operasikan pltp binary cycle 500kW. Detik finance, retrieved from

S. Quoilin, "Techno-economic Survey of Organic Rankine Cycle (ORC) System," .Elsevier, 2013.

F. Wakana, "Preliminary Study of Binary PowerPlant Feasibility Comparing ORC and Kalina for Low-Temperature Resources in Rusizi Valley, Burundi," in Geothermal Training Programme, Reykjavik, 2013.

S. Masheiti, B. Agnew and S. Walker, "An Evaluation of R134a and R245fa as the Working Fluid in an Organic Rankine Cycle Energized from a Low Temperature Geothermal Energy Resources," Journal of Energy and Power Engineering, vol. 5, no. David Publishing, pp. 392-402, 2011.

M. Agani, "Opportunity and Barriers to Develop a Bottoming Unit by Utilizing Separated Hot Brine in Ulubelu, Indonesia," in Proceeding World Geothermal Congress, Melbourne, 2015.

S. Frick, "Geothermal Binary Power Plant for Lahendong, Indonesia: A German-Indonesia Collaboration Project," in Proceeding World Geothermal Congress, Melbourne, 2015.

F. Heberle, T. Jahrfeld and D. Brueggemann, "Thermodynamics Analysis of DOuble-Stage ORC for Low-Entalphy Sources Based on a Case Study for 5.5 MWe PowerPlant Kirchstockach (Germany)," in Proceeding World Geothermal Congress, Melbourne, 2015.

Y. A. Cengel, Thermodynamics: An Engineering Approach 5th Ed., McGraw-Hill, 2006.

R. DiPippo, Geothermal Powerplant: Principles, Applications, Case Studies and Environmental Impact 2nd de., Elsevier, 2007.

T. Delft, "Cycle Tempo Reference Guide," TU Delft, Technical Notes.

A. Amlaku and B. Olav, "Working Fluids for Low-Temperature Heat Source," Energy and Process Engineering, no. Elsevier, 2010.

ASHRAE, "Designation and Safety Classification of Refrigerants. Ashrae Standard no 34," ASHRAE, 2013.

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