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Journal : International Journal of Computer and Information System (IJCIS)

Energy Audit and Assessment of Energy Saving Opportunities Using Analytical Hierarchy Process in Public Health Center Buildings in Jakarta to Optimize Energy Efficiency Monika, Ratih; Garniwa, Iwa
International Journal of Computer and Information System (IJCIS) Vol 6, No 2 (2025): IJCIS : Vol 6 - Issue 2 - 2025
Publisher : Institut Teknologi Bisnis AAS Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29040/ijcis.v6i2.236

Abstract

The Government of Indonesia has issued a regulation through Government Regulation No. 33 of 2023, mandating central and regional governments to implement energy conversion efforts. Conducting energy audits in public health center buildings in Jakarta has become an essential step toward realizing concrete energy conservation actions. This study was conducted at the XYZ District Public Health Center with the objectives of assessing energy consumption patterns, identifying potential energy-saving opportunities, and determining the prioritized recommendations to optimize energy efficiency. The audit findings indicate that the building still holds an energy-saving potential of 54.66%, with an estimated annual saving of 146,204.95 kWh or approximately IDR 139,625,731. If energy-saving strategies are applied on a broader scale, Jakarta's potential energy savings could reach 0.43%, or about 6,433,017.8 kWh/year, equivalent to IDR 1,030,598,693/year. At the national level, potential energy savings could reach 19.5%, amounting to 1,030,598,692.55 kWh/year or IDR 984,221,777,819/year. To assist public health center management in determining the prioritization of energy-saving opportunities, this study employed the Analytical Hierarchy Process (AHP) method using 4 criteria and 8 alternatives based on the energy audit recommendations. Expert assessments involving representatives from the health center, government, and practitioners determined that the priority order for the criteria level: ease of implementation, implementation cost, impact on service, and energy-saving potential. Meanwhile, the prioritized alternatives level: AC temperature setting, socket management, reduction in AC infiltration load, lighting operation management, AC operation management, AC maintenance, application of motion sensor technology, and replacement of energy efficient air conditioning technology.
Techno-Economic Feasibility Analysis of a Small-Scale Waste-to-Energy Power Plant as a Supporting Electricity Source: A Case Study on Sabira Island Harahap, Saskia Saraswati; Garniwa, Iwa
International Journal of Computer and Information System (IJCIS) Vol 6, No 2 (2025): IJCIS : Vol 6 - Issue 2 - 2025
Publisher : Institut Teknologi Bisnis AAS Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study explores the techno-economic feasibility of establishing a small-scale waste-to-energy (WTE) power plant using anaerobic digestion technology on Sabira Island, one of the outermost islands of Jakarta, Indonesia. As an isolated area with limited energy access and increasing organic waste generation—estimated at around 1 to 1.2 tons per day—Sabira presents both an environmental challenge and a renewable energy opportunity. Through the conversion of organic waste into biogas, which can then be used to generate electricity, this project seeks to address waste management issues while contributing to sustainable energy production in remote regions. A comprehensive techno-economic analysis was conducted, incorporating factors such as capital and operational costs, biogas yield potential, energy conversion efficiency, and local electricity pricing. Two different electricity selling price scenarios were evaluated to determine financial viability. The results show that under the first pricing scheme, the project fails to meet the minimum return expectations, whereas the second scenario demonstrates acceptable economic performance, suggesting that the project can be considered feasible if more favorable electricity tariffs are adopted. The study concludes that successful implementation of such a WTE system would depend not only on technical and economic parameters but also on supportive policy frameworks, appropriate pricing mechanisms, and access to clean energy financing. The findings offer valuable insights for policymakers and stakeholders aiming to promote decentralized renewable energy solutions in Indonesia’s remote islands.