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All Journal Rotasi Jurnal Offshore: Oil, Production Facilities, and Renewable Energy
Indri Haryani
PLN Puslitbang
Earth & Planetary Sciences Energy Engineering Mechanical Engineering

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Analisis Pengujian Co-Firing Biomassa Cangkang Kelapa Sawit Pada PLTU Circulating Fluidized Bed (CFB) Sebagai Upaya Bauran Energi Terbarukan Indra Ardhanayudha Aditya; Fajar Nurrohman Haryadi; Indri Haryani
ROTASI Vol 24, No 2 (2022): VOLUME 24, NOMOR 2, APRIL 2022
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.24.2.61-66

Abstract

The co-firing characteristics of palm kernel shell biomass are implemented at a Circulating Fluidized Bed (CFB) power plant to determine the effect of co-firing on the potential for corrosion, slagging, fouling, and specific fuel consumption (SFC). Biomass co-firing fuel is mixed in a stockpile with the composition of the co-firing scenario, namely 5%, 10%, 15%, and 20% palm shells for the burn test. Data is retrieved after a stabilization period and then automatically recorded by the data acquisition system. The test results show a lower calorific value, higher volatile matter content, and higher ash content than the coal used during the test. The percentage of oil palm shells in co-firing increases the SFC at the PLTU up to 3,7%. Lower sulfur and HGI content than coal make it more challenging to work. The ratio of base to acid when co-firing 5%, 10%, and 15% palm shells are in the high/weight category. The slagging index when coal burning and co-combustion is still at a safe limit. The Fouling Index for coal combustion and co-firing of 5%, 15%, and 20% of palm shells is in the high category, while co-firing of 10% of palm shells is severe. Based on the sulfur and chlorine data in the fuel, the ratio of 2S/Cl during coal combustion and co-firing is feasible >8. The corrosion potential due to the presence of chlorine is Cl-induced active synthesis minor.
A Comparative Review of Ancillary Service Markets: Benchmarking Global Practices and Implications for Indonesia Indri Haryani; Valensi Erza; Hendri Bhirowo
Jurnal Offshore: Oil, Production Facilities and Renewable Energy Vol. 10 No. 1 (2026): Jurnal Offshore: Oil, Production Facilities and Renewable Energy
Publisher : Universitas Proklamasi 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30588/jo.v10i1.2750

Abstract

The rapid integration of renewable energy sources is transforming power system operations, resulting in reduced system inertia and increased operational variability. These modifications increase the demand for advanced ancillary service (AS) to ensure system stability, including frequency regulation, reserve provision, and voltage management. Unlike countries that have implemented market-based ancillary services and advanced technologies, Indonesia still operates ancillary services through centralized mechanisms with limited participation of new technologies. This report presents a comparative analysis of the development of ancillary service in selected countries by assessing aspects of market structure, pricing mechanisms, technology integration, regulatory frameworks, and operational maturity. A qualitative maturity assessment methodology is used to evaluate the level of implementation across various power systems. The findings reveal significant differences between developed and developing systems. Countries such as Australia, the United Kingdom, and the United States demonstrate more advanced maturity by incorporating rapid response technologies, competitive market frameworks, and real-time system operations. In contrast, Indonesia is still at an early stage with centralized management, limited technology integration, and the absence of a structured ancillary service market. Unlike existing comparative studies focused on OECD contexts, this paper explicitly targets the policy and implementation gap for a large, archipelagic, state utility dominated emerging economy. A five phase implementation roadmap is proposed for 2025–2034, aligned with RUPTL targets and calibrated to Indonesian institutional realities.
Co-Authors Fajar Nurrohman Haryadi Hendri Bhirowo Indra Ardhanayudha Aditya Valensi Erza