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Journal : Innovative: Journal Of Social Science Research

Analisis Kelayakan Investasi Sistem PLTS Atap pada Gedung Lecture Building Universitas Udayana Yoga, Ida Bagus Savitar Dharma; Sukerayasa, I Wayan; Setiawan, I Nyoman; Janardana, I Gusti Ngurah; Budiastra, I Nyoman; Suartika, I Made
Innovative: Journal Of Social Science Research Vol. 5 No. 4 (2025): Innovative: Journal Of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/innovative.v5i4.20982

Abstract

The use of renewable energy, especially Solar Power Plants (PLTS) is an alternative solution in facing increasing electricity needs and limited conventional energy supply. The Udayana University Lecture Building, which has a high level of operation during the day, is the object of designing a rooftop solar power plant system with an on-grid configuration equipped with a Battery Energy Storage System (BESS). This study aims to evaluate the feasibility of investing in the solar PV system to be designed. The analysis methods used include the calculation of Life Cycle Cost (LCC), Cost of Energy (CoE), Capital Recovery Factor (CRF), Net Present Value (NPV), Internal Rate of Return (IRR), Discounted Payback Period (DPP), and Profitability Index (PI). The results of the investment feasibility analysis showed that the initial investment of IDR 1,298,931,811 resulted in an NPV value of IDR 123,306,233, IRR of 21.01%, DPP for 21.9 years, and PI of 1.09. Thus, this project was declared financially feasible to be implemented.
Perancangan PLTS Atap di Gedung Lecture Building Universitas Udayana Sihombing, Jupael; Sukerayasa, I Wayan; Setiawan, I Nyoman; Janardana, I Gusti Ngurah; Budiastra, I Nyoman; Suartika, I Made
Innovative: Journal Of Social Science Research Vol. 5 No. 4 (2025): Innovative: Journal Of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/innovative.v5i4.21043

Abstract

The growing demand for electricity in the Province of Bali is still largely dominated by the use of fossil fuels and coal. This reliance on conventional energy sources contributes to carbon dioxide (CO₂) emissions and greenhouse gases, which in the long term have a negative impact on the environment. To reduce this dependency, the utilization of renewable energy sources such as Solar Power Plants (PLTS) offers an effective and environmentally friendly solution. The Lecture Building at Udayana University was selected as the study object due to its relatively high electricity consumption. The PLTS system design for this building was based on the available roof area, utilizing all four roof sides. Each side is equipped with 32 solar modules rated at 670 Wp per unit, one inverter with a capacity of 25 kW, and 16 battery units each with a capacity of 200 Ah. The system design was simulated using PVSyst software, and with a total installed capacity of 85.76 kWp, the system is capable of generating approximately 515.8 kWh of electricity per day.
Audit Energi pada Gedung Lecture Building Universitas Udayana Nugraha, I Komang Krisna Bayu; Sukerayasa, I Wayan; Setiawan, I Nyoman; Janardana, I Gusti Ngurah; Budiastra, I Nyoman; Suartika, I Made
Innovative: Journal Of Social Science Research Vol. 5 No. 4 (2025): Innovative: Journal Of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/innovative.v5i4.21045

Abstract

Increasing electrical energy consumption in the education sector requires efforts to save on campus buildings. This study aims to identify efficiency opportunities in the Lecture Building of Udayana University using the walk-through audit method. Measurements were made on lighting, air conditioning (AC), elevators, and pumps using lux meters, infrared thermometers, and power quality analyzers. The results showed that the biggest savings came from the air conditioning system of 22,965 kWh/month (15.47% efficiency) through temperature and operating time adjustments. The energy consumption intensity (IKE) value was recorded at 54,145 kWh/m²/year for one floor and 18,048 kWh/m²/year for three floors, far below the standard of 240kWh/m²/year. The other system generates technical recommendations to support the sustainable implementation of green campuses.