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ANALISIS POTENSI ENERGI MATAHARI MENJADI ENERGI LISTRIK DI INDONESIA: PROYEKSI DAN PERAMALAN KAPASITAS TERPASANG PLTS DENGAN METODE DOUBLE EXPONENTIAL SMOOTHING Timotius, Hizkia; Welman Simatupang, Joni; Andriani, Mutiara; Situmeang, Praja; Ramos SM, Indra; Fauzi, Muamar
TESLA: Jurnal Teknik Elektro Vol 25 No 2 (2023): TESLA: Jurnal Teknik Elektro
Publisher : Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/tesla.v25i2.25831

Abstract

This study endeavors to assess the progression in the installed capacity of Solar Power Plants (PLTS) in Indonesia, given that the obtained data indicates a solar energy potential of 207,898 MW in the country. However, the installed capacity of Solar Photovoltaic (PV) Power Plants (PLTS) is still low compared to other types of power plants. In the projection for the National Electricity Supply Business Plan (RUPTL) 2021-2030, it is expected that the installed capacity of PLTS will increase to 4.7 GWp by 2030, but this is still far from the target projection of 800-840 GWp by 2050 according to IRENA. Through forecasting using three methods, namely moving average, single exponential smoothing, and double exponential smoothing, the projected installed capacity for the year 2050 significantly deviates from IRENA's projection. Historical data of installed capacity of PLTS from 2010 to 2022 was used as the basis for the forecasting. The results of the three forecasting methods were compared to assess their accuracy and performance in predicting the installed capacity of PLTS in the future years. This study suggests using the double exponential smoothing method as a feasible forecasting technique and emphasizes the need for further research on inhibiting factors and support from various stakeholders to successfully utilize solar energy as a source of electricity in Indonesia. The findings of this research provide guidance for the planning and development of PLTS in the future, as well as important implications for achieving the national renewable energy projection targets. ABSTRAK: Studi ini berupaya untuk menilai perkembangan kapasitas terpasang Pembangkit Listrik Tenaga Surya (PLTS) di Indonesia mengingat data yang diperoleh menunjukkan potensi energi surya sebesar 207.898 MW di Indonesia. Namun, kapasitas terpasang Pembangkit Listrik Tenaga Surya (PLTS) masih rendah dibandingkan jenis pembangkit lainnya. Dalam proyeksi RUPTL 2021-2030, diharapkan kapasitas terpasang PLTS meningkat menjadi 4,7 GWp pada tahun 2030, tetapi tetap jauh dari target proyeksi IRENA yang mencapai 800-840 GWp pada tahun 2050. Melalui peramalan menggunakan tiga metode, yaitu moving average, single exponential smoothing, dan double exponential smoothing, diperoleh hasil kapasitas terpasang pada tahun 2050 dengan selisih yang signifikan dari proyeksi IRENA. Data historis kapasitas terpasang PLTS dari tahun 2010 hingga 2022 diambil sebagai dasar peramalan. Hasil peramalan dari ketiga metode tersebut dibandingkan untuk menilai akurasi dan kinerjanya dalam memprediksi kapasitas terpasang PLTS pada tahun-tahun mendatang. Penelitian ini menyarankan penggunaan metode double exponential smoothing sebagai metode peramalan yang layak, dan menekankan perlunya penelitian lebih lanjut mengenai faktor penghambat dan dukungan dari berbagai pihak untuk berhasilnya pemanfaatan energi surya sebagai sumber tenaga listrik di Indonesia. Hasil penelitian ini memberikan panduan untuk perencanaan dan pengembangan PLTS di masa depan, serta implikasi penting dalam mencapai target proyeksi energi terbarukan nasional.
Experimental and Computational Analysis of UHMWPE-Based Multi-Layered Bulletproof Vests Under 9mm Projectiles Impact Timotius, Hizkia; Sastranegara, Azhari; Hernawan, Rendi; Sutisna, Nanang Ali; Anggraini, Lydia
METAL: Jurnal Sistem Mekanik dan Termal Vol. 9 No. 1 (2025): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/metal.9.1.1-13.2025

Abstract

This study investigates the ballistic performance and energy absorption of multi-layered UHMWPE bulletproof vests against 9mm projectiles using experiments and finite element simulations (LS-DYNA). Two configurations were analyzed: a conventional structure and a sandwich-layered design incorporating UHMWPE, titanium (Ti6Al4V), and PVC. Ballistic tests, conducted per NIJ Level IIIA standards, were validated through simulations. The sandwich-layered vest exhibited superior energy dissipation, achieving BFS values of 12.03 mm (experiment) and 12.36 mm (simulation), effectively reducing blunt trauma risk. The multi-material approach enhanced penetration resistance and impact force distribution, while numerical models closely matched experimental findings, confirming reliability. Results demonstrate the feasibility of lightweight, high-performance ballistic armor. Future work will explore material optimization, configuration refinements, and testing with higher-caliber projectiles for broader applications.