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All Journal Jurnal Spektran Rekayasa Mesin Jurnal Wilayah dan Lingkungan Jurnal Serambi Engineering TERANG : Jurnal Pengabdian Pada Masyarakat Menerangi Negeri Indonesian Journal for Social Responsibility Unri Conference Series: Community Engagement Jurnal Sosial dan Teknologi Jurnal Teknologi dan Manajemen Industri Terapan Jurnal Ilmiah Multidisiplin Indonesia Journal Serambi Engineering (JSE) Energy: Jurnal Ilmiah Ilmu-ilmu Teknik
Brunner, I Made Indradjaja
Institut Teknologi Perusahaan Listrik Negara
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences

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Simulasi Pemilihan Pengelolaan Stillage sebagai Produk Samping Industri Etanol dari Bahan Baku Tetes Tebu dengan Metoda Pohon Keputusan I Made Indradjaja Brunner; Hernani Yulinawati
Jurnal Serambi Engineering Vol 8, No 1 (2023): Januari 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i1.5292

Abstract

Stillage merupakan produk samping dari proses distilasi pada industri pembuatan etanol. Bahan baku etanol dapat berasal dari proses fermentasi tetes tebu yang telah dicampur dengan ragi dan bahan penolong lain. Tetes tebu merupakan hasil samping dari pemurnian gula tebu pada industri gula. Pemanfaatan produk samping proses industri merupakan suatu upaya untuk mengurangi buangan ke lingkungan serta memberi nilai tambah dengan memproduksi hasil yang lebih bernilai ekonomi. Namun demikian, stillage apabila terbuang ke badan air permukaan dapat membahayakan kehidupan biota perairan. Hal ini dikarenakan stillage memiliki kandungan organik yang tinggi dengan kadar Kebutuhan Oksigen Kimiawi dapat mencapai 90.000 mg/L. Stillage juga mengandung kalium, fosfor dan sulfat yang dapat dimanfaatkan sebagai pupuk alternatif pada perkebunan tebu. Artikel ini mendiskusikan altenatif pengelolaan stillage pada industri etanol. Alternatif pengelolaan yang disajikan merupakan hasil temuan nyata di lapangan, namun angka-angka yang digunakan dalam analisis merupakan nilai asumsi. Simulasi pemilihan dilakukan dengan menggunakan perhitungan Net Present Value (NPV) yang dipadukan dengan model Pohon Keputusan, serta dilanjutkan dengan uji sensitivitas model Pohon Keputusan. Hasil analisis menunjukkan bahwa alternatif terpilih dengan menggunakan perhitungan NPV dapat dipertajam dengan memasukkan beberapa kemungkinan kejadian yang mempengaruhi pelaksanaan alternatif pengelolaan. Selanjutnya, penggunaan uji sensitivitas dapat memberikan gambaran bagi pengambil keputusan terkait potensi risiko dari setiap alternatif pengelolaan.
Penerapan Metode Kendali Aliran Sebagai Upaya Pelestarian Sumber Daya Air Di Pondok Pesantren Nurul Haramain Ibnu Hajar; I Made Indradjaja Marcus Brunner; Dhami Johar Damiri; Martin Choirul Fatah; Yuliansyah Yuliansyah; Jumiati Jumiati
Terang Vol 5 No 2 (2023): TERANG : Jurnal Pengabdian Pada Masyarakat Menerangi Negeri
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/terang.v5i2.1760

Abstract

Environmental damage can be caused by an imbalance of the earth’ constituent elements, which one of the elements is scarcity of clean water in the earth. Dearth of clean water is predicted that will be experienced more than a half of word population of nine million of human being in 2050. The phenomenon of the scarcity of the clean water has been occurred especially in Indonesia that it is a country which has six percent of the potential of the clean water, but in fact it shows the need of the clean water of Indonesia population are still not enough. The dearth of the clean water needs to get serious attention from all stake holder, included people in the boarding school. An effort to decrease the scarcity of the clean water rate is by behaving frugally in using the clean water. To do that need to do socialization massively to the people and it require a long time. Therefore, beside the socialization massively, engineering to decrease the flow rate in using the clean water through the valves that is by applicating flow control method. This simple technology of flow control application, the community service team and Nurul Haramain boarding school located in Kampung Saitem, Ciburayut, Cigombong, Bogor, West Java are collaborated. A measurement result of flow rate before the flow restrictor is applicated in the valve is 7.76 liter/minute and after applicated decrease to 1.13 litter/minute. Percentage of decreasing is to reach 83 percent.
Analisis Komparatif Penerbangan Boeing B-737 dan Airbus A-320 Rute Palembang – Cengkareng Pasca Pandemi Covid-19 I Made Indradjaja Brunner; Nella Sajida Talfa; Barkah Alif
Jurnal Serambi Engineering Vol 8, No 3 (2023): Juli 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i3.6444

Abstract

Aviation activities experienced a strong disruption during the Covid-19 pandemic with restrictions on passenger movement. This article describes a statistical analysis related to flight activity on two types of aircraft, the Boeing B-737 and Airbus A-320, during the end of the pandemic. This research uses the case study method using daily data on the number of passengers, baggage weight, cargo weight, and total fuel needed during the 2021-2022 period. The data is analyzed using descriptive statistics and inferential analysis, namely one-way t-test with the assumption of inequality of variance. The results of the descriptive analysis show that in 2021-2022 there were fluctuations in number of passengers and cargo. Flight activity of the Airbus A-320 is more frequent than that of the Boeing B-737. These results also prove that flight activity on weekends is busier than on weekdays. In addition, the results of the t-test analysis show that there is a significant difference at 95% confidence level between the flight activities of the Airbus A-320 and the Boeing B-737 on the Palembang-Cengkareng departure route at Sultan Mahmud Badaruddin II Airport. This article is also expected to provide an overview regarding the use of statistics to test differences between two variables.
Simulasi Pemilihan Pengelolaan Stillage sebagai Produk Samping Industri Etanol dari Bahan Baku Tetes Tebu dengan Metoda Pohon Keputusan I Made Indradjaja Brunner; Hernani Yulinawati
Jurnal Serambi Engineering Vol 8, No 1 (2023): Januari 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i1.5292

Abstract

Stillage merupakan produk samping dari proses distilasi pada industri pembuatan etanol. Bahan baku etanol dapat berasal dari proses fermentasi tetes tebu yang telah dicampur dengan ragi dan bahan penolong lain. Tetes tebu merupakan hasil samping dari pemurnian gula tebu pada industri gula. Pemanfaatan produk samping proses industri merupakan suatu upaya untuk mengurangi buangan ke lingkungan serta memberi nilai tambah dengan memproduksi hasil yang lebih bernilai ekonomi. Namun demikian, stillage apabila terbuang ke badan air permukaan dapat membahayakan kehidupan biota perairan. Hal ini dikarenakan stillage memiliki kandungan organik yang tinggi dengan kadar Kebutuhan Oksigen Kimiawi dapat mencapai 90.000 mg/L. Stillage juga mengandung kalium, fosfor dan sulfat yang dapat dimanfaatkan sebagai pupuk alternatif pada perkebunan tebu. Artikel ini mendiskusikan altenatif pengelolaan stillage pada industri etanol. Alternatif pengelolaan yang disajikan merupakan hasil temuan nyata di lapangan, namun angka-angka yang digunakan dalam analisis merupakan nilai asumsi. Simulasi pemilihan dilakukan dengan menggunakan perhitungan Net Present Value (NPV) yang dipadukan dengan model Pohon Keputusan, serta dilanjutkan dengan uji sensitivitas model Pohon Keputusan. Hasil analisis menunjukkan bahwa alternatif terpilih dengan menggunakan perhitungan NPV dapat dipertajam dengan memasukkan beberapa kemungkinan kejadian yang mempengaruhi pelaksanaan alternatif pengelolaan. Selanjutnya, penggunaan uji sensitivitas dapat memberikan gambaran bagi pengambil keputusan terkait potensi risiko dari setiap alternatif pengelolaan.
Maximum Hourly and Daily Concentration Patterns of Urban Jakarta Tropospheric Ozone Hernani Yulinawati; I Made Indradjaja M Brunner
Jurnal Serambi Engineering Vol. 9 No. 1 (2024): Januari 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Tropospheric ozone is formed through UV radiation from sunlight with NOx and VOC precursors. Continuous O3 measurement data were obtained from US Embassy in Central Jakarta from November 4 2022 to September 30, 2023. The data were analyzed and compared with Indonesian NAAQS for 1-hour and 8-hour. Based on NAAQS, 1-hour O3 concentration is measured between 11:00-14:00; The 8-hour concentration is the average of the 8 hours measurements between 06:00-18:00. Based on the analysis, maximum concentration tends to occur between 11:00-16:00. The 1-hour concentration increased in July-September 2023, while maximum of 103 μg /m3 was recorded on November 4, 2022 at 14:00-15:00. Based on the recorded data, the 8-hour concentration can be calculated as the average of 8 hours concentration between 06:00 to 21:00. The measurement between 10:00-18:00 shows higher average 8-hour ozone concentration compared to other ranges. Lowest value was obtained in between 06:00-14:00. With additional O3 concentration data is expected Jakarta air quality can be more understood. With fast application of Low-Cost Sensor (LCS) for PM2.5, LCS for O3 can be considered to support limited number of AQMS in Jakarta. More O3 measurements needed since this parameter is strongly influenced by local meteorological conditions, contributing NOx and VOC pollutants activities, as well wind movement pattern.
Analisis Emisi dari Pembakaran Bahan Bakar Gas dengan Pendekatan Perhitungan Stoikiometrik I Made Indradjaja M. Brunner; Hernani Yulinawati
Jurnal Serambi Engineering Vol. 9 No. 3 (2024): Juli 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

This article explains the analysis of potential emissions from the combustion of gaseous fuels, namely natural gas, coke oven gas (COG) and blast furnace gas (BFG). Fossil gas fuels are widely used in industrial activities, particularly in the integrated iron and steel industry. Natural gas is generally derived from natural sources and contains mainly methane gas in addition to longer chain hydrocarbon gases and other non-hydrocarbon gas compounds. COG is a by-product of the production of coke from coal and generally contains hydrogen and methane gas. BFG is the flue gas from the process of smelting iron ore in a furnace and consists of a mixture of nitrogen, carbon monoxide, carbon dioxide and hydrogen gas. Theoretical analysis shows that for an energy level equivalent to natural gas, approximately 2.35 times more COG and 11.56 times more BFG are required than natural gas. COG emissions tend to be lower in CO2 but higher in NO2 and SO2 than natural gas emissions. CO2 and NO2 gas emissions from COG are lower than those from BFG. However, CO2 and NO2 gas emissions from BFG are much higher than those from natural gas.
PERSAMAAN REGRESI LINIER BERGANDA UNTUK MEMPREDIKSI EFISIENSI BOILER Eko Sarwono; Martin Choirul Fatah; Brunner, I Made Indradjaja Marcus Brunner
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1179

Abstract

Boiler efficiency calculation is crucial to determine the reliability of boiler performance. Generally, boiler efficiency is calculated by the heat loss method, which considers losses in the combustion process. The calculation consumes more time due to detailed procedure and analysis. This research aims to develop a multiple linear regression equation in predicting boiler efficiency based on performance test data from PLTU X unit 1. The equation was then validated with a classical assumption test, i.e. normality, linearity, multicollinearity, heteroscedasticity, autocorrelation, and hypothesis test. In addition, the equation was used to calculate the boiler efficiency at PLTU ABC (unit 1 & 2) and PLTU XYZ (unit 1). The results show that there is approximately 0.49% boiler efficiency discrepancy among equation and heat loss method calculations.
Edukasi Pelestarian Lingkungan Hidup dan Penghematan Air Madonna, Sandra; Hermiyetti, Hermiyetti; Dewi Meilasari Sugiana, Astrid; Made Indradjaja Brunner, I
Indonesian Journal for Social Responsibility Vol. 6 No. 02 (2024): December 2024
Publisher : LPkM Universitas Bakrie

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36782/ijsr.v6i02.280

Abstract

Wasting clean water in society worsens the shortage of water and makes it harder to access. To address this, it’s important to promote water-saving habits and boost community involvement in protecting the environment. The clean water crisis has also been felt by the community of the Majelis Taklim Nurul Qolbi. The Majelis Taklim Nurul Qolbi, an association of blind people in Tangerang City, has also faced water shortages, especially during dry seasons and large gatherings. Community Service Activities have been carried out to overcome this problem by using technological and social approaches. The technological approach is to install 4 ablution water flow limiters at the Nurul Qolbi Musala. The social approach is to provide socialization to the community, especially the congregation at the Majelis Taklim Nurul Qolbi to save water, especially for ablution. The result of this community service activity is the application of appropriate technology from water flow limiters resulting from research innovations and social activities that have been carried out previously. This activity has succeeded in saving ablution water by reducing the water flow rate by 74.6%. The water discharge before the installation of the device was around 5 L/minute and after the installation of the device the water flow decreased to 1.27 L/minute. The results of this community service activity have given the congregation awareness to preserve the environment by carrying out energy efficiency and water conservation, and spreading the culture of saving water in the surrounding environment.
Kajian Kinerja Pembangkit dan Emisi Gas Buang dari Kegiatan Co-Firing Menggunakan Tongkol Jagung di PLTU Sumbawa Barat Ariwibawa, Yunisetya; Brunner, I Made Indradjaja
Jurnal Serambi Engineering Vol. 10 No. 2 (2025): April 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Co-firing activities have been implemented at the Sumbawa Barat Power Plant (PLTU), which has a capacity of 2 x 7 MW and is operated by PT PLN UPK Tambora. The power plant uses a stoker type boiler fired with low calorific coal and biomass. The biomass used for co-firing is corn cobs, which are readily available in the vicinity of the power plant. The co-firing process involves combining 3% dried corn cobs with 97% coal. The mixture is first prepared manually at the dry coal site. The mixture is then processed through a crusher to ensure a uniform particle size. Finally, the ground mixture is fed into the boiler room via a coal feeder. Key generator metrics are monitored, including coal flow, total air flow, furnace exit gas temperature, furnace exit pressure, main steam temperature, and main steam pressure. In addition, air quality emissions, specifically the levels of SO2 and NOx in the flue gas, are being monitored. The co-firing activity, conducted over a 3-hour period, showed that the operating parameters of the generator did not undergo significant changes and remained suitable for the safe operation of the power plant. In addition, the levels of SO2 and NOx in the flue gas decreased compared to the use of 100% coal.
Analisis Anomali Pengukuran kWh Meter Utama dan Meter Pembanding Konsumen KCIC GIS Poncol Baru II Hery Diansyah; I Made Indradjaja Marcus Brunner
Jurnal Teknologi dan Manajemen Industri Terapan Vol. 5 No. 2 (2026): Jurnal Teknologi dan Manajemen Industri Terapan
Publisher : Yayasan Inovasi Kemajuan Intelektual

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55826/jtmit.v5i2.1420

Abstract

Besaran arus dan tegangan yang diterima sangat mempengaruhi kinerja kWh meter. Kesalahan pengukuran dapat terjadi karena ketidaksesuaian nilai arus atau tegangan yang dapat menyebabkan perbedaan antara pengukuran meter utama dan pembanding. Hal ini dapat menyebabkan terjadinya dispute kedua pihak yang bertransaksi. Dengan menggunakan meter konsumen sebagai acuan yang dianggap valid, penelitian ini bertujuan untuk mengindentifikasi penyebab terjadinya kesalahan pengukuran sehingga terjadi deviasi antara pembacaan pada meter utama dengan meter pembanding. Selain observasi langsung di lapangan, sistem Reading Meter Automatic (AMR) digunakan untuk mengumpulkan data load profile, dan metode Z-test statistik digunakan untuk menganalisisnya. Metode penelitian ini mencakup cara mengkaji dan menelaah teori-teori pendukung, pengujian dan observasi dilapangan serta diskusi dengan pihak-pihak terkait. Hasil penelitian menunjukan bahwa penyebab deviasi pembacaan mengarah pada kesalahan rangkaian wiring di kWh meter ketika suplai dari GIS Sumarecon Bekasi II kwh meter utama dan pembanding menunjukan pembacaan bernilai konstan ± 1600 kwh. Dari pengukuran pertama ditemukan bahwa ada energi yang tercatat namun indikasi error data constant. Dari hasil Ztest didapatkan hasil probabilitas > 0,05 = tolak H0. pembacaan meter utama dan meter pembanding masih terdapat perbedaan signifikan. terdapat pergeseran fasa pada rangkaian VT dimana cos phi mendekati 1 ketika suplai dari GIS Summarecon Bekasi II atau line KCIC pada GIS Poncol Baru II tidak berbeban Dilakukan perbaikan pada tanggal 7 Agustus 2024. Sehingga pembacaan cosphi berubah dari 0,86 menjadi -0,076 dan sudut antara arus dan tegangan mendekati 90° dan pembacaan beban mendekati nol “0” dan pihak yang bertransaksi tidak mengalami dispute.
Co-Authors Angelica Angelica Arief Norhidayat Ariwibawa, Yunisetya Asep Akbar Azhari Barkah Alif Bintang Dewan Tomo Dewi Meilasari Sugiana, Astrid Dhami Johar Dhamiri Diantari, Retno Aita Eko Sarwono Hermiyetti Hernani Yulinawati Herry Nugraha Hery Diansyah Ibnu Hajar Ibnu Hajar Ikhwani Faqih Joko Muslim Jumiati Jumiati Jumiati Jumiati Jumiati Jumiati Martin Choirul Fatah Martin Choirul Fatah Moch. Taofik Ma’mur Nella Sajida Talfa Rostiyanti, Susy Fatena Sandra Madonna Satria M. Brunner Sembiring, Elsa Try Julita Soetjipto Soewono Syarif Hidayat Tasdik Darmana Yuliansyah Yuliansyah Yuliansyah Yuliansyah Yuliansyah Yuliansyah Zaenal Zaenal Zil Nunes Pinto