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All Journal Rotasi Journal of Economics and Business UBS Co-Value : Jurnal Ekonomi, Koperasi & Kewirausahaan
Dzikri Firmansyah Hakam
Institut Teknologi Bandung
Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Mechanical Engineering

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Journal : Rotasi

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Kajian Potensi Peningkatan Daya Terpasang PLTA Sebagai Pemanfaatan Surplus Debit Air Unit PLTA Batang Agam Kurniawan, Elfin; Hakam, Dzikri Firmansyah; Prahastono, Iswan; Nainggolan, Akiman
ROTASI Vol 23, No 1 (2021): VOLUME 23, NOMOR 1, JANUARI 2021
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.23.1.32-38

Abstract

Batang Agam hydro Power Plant is a run of river hydro Power Plant which operated in 1976 with initially 2 (two) generation units operation. In 1981, the Batang Agam hydro Power Plant experienced 1 (one) unit expansion, resulted in total capacity of 3 x 3,5 MW. Based on the analysis carried out by the author, we found that there are potential for additional generating power from the existing river flow. This analysis based on 3 (three) types of studies, namely the study of excess inlet water discharge (inflow) at the overflow point in the tando pond spillway, the study of excess inflow at the overflow point in the spillway sand pond, and the study of water savings from modification of the tando pond screen outlet. Moreover, this research conducts a study on the capacity of additional units and the capacity of the existing waterway to determine the durability of the infrastructure. Based on the study results, an inflow surplus of 2,58 m3/s was obtained with a potential additional unit capacity of 2 MW. After more than 40 years of operation, the main hydropower facilities experience several modifications in the intake and the tando pond. We identified the potential to increase the installed power capacity of the Batang Agam Hydroelectric Power Plant by utilizing the surplus water in the tando and sand pond. The utilization of this water surplus can convert hydro energy into electrical energy that produce an additional 1 x 2 MW generator unit. This research provides a beneficial to PLN in increasing power supply to the interconnection system without land acquisition by utilizing the existing waterway.
Pengaruh Penambahan Zat Aditif Pada Pengecoran Beton Joint Pit SKTT 150 kV Sario – Teling Fitrianto, Andrian Juli; Hakam, Dzikri Firmansyah; Prahastono, Iswan; Nainggolan, Akiman
ROTASI Vol 23, No 1 (2021): VOLUME 23, NOMOR 1, JANUARI 2021
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.23.1.39-49

Abstract

The construction of a 150 kV Sario - Teling High Voltage Cable Line (SKTT), which located in the city of Manado - North Sulawesi Province, is an important electricity project that has been planned to operate in 2020 according to the 2019-2028 Rencana Umum Penyediaan Tenaga Listrik (RUPTL). This transmission line construction is expected to increase electrical energy services in North Sulawesi region. This SKTT project applied the Boring Horizontal Directional Drilling (HDD) method to install the 150 kV SKTT cable. On the other hand, the Joint Pit installation uses a Box Culvert precast construction consisting of reinforced concrete.From the test results of the samples, we can conclude that there were an increases in the compressive strength of concrete from 1,04% to 1,27% above the compressive strength of normal concrete. There was a decrease in the compressive strength of the concrete at several points. However, this anomaly is still above the minimum limit of concrete compressive strength determined by PLN, which is 400 kg / cm2.This study involved laboratory testing to determine the effect of additives added during Box Culvert casting in order to obtain an efficient hardening time. It is hoped that this study will have an impact on the completion of the SKTT 150 kV Sario - Teling project on time, so that it can provide economic benefits for PLN and the consumer.
Co-Authors Erman Sumirat Fitrianto, Andrian Juli Irfan Sihab Budin F Kurniawan, Elfin Nainggolan, Akiman Prahastono, Iswan Riza Syafitri