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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Abdimas PROSIDING SENATEK FAKULTAS TEKNIK UMP Equilibrium Journal of Chemical Engineering Automotive Experiences Semar : Jurnal Sosial dan Pengabdian Masyarakat
Inayati Inayati
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Aerospace Engineering Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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MODEL MATEMATIS PENJERAPAN KADMIUM DALAM AIR PADA ADSORBEN KULIT NANGKA Anita, Fransisca; Indah, Adelia; Inayati, Inayati
PROSIDING SENATEK FAKULTAS TEKNIK UMP 2015: PROSIDING SENATEK TAHUN 2015, 28 November 2015
Publisher : PROSIDING SENATEK FAKULTAS TEKNIK UMP

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

Abstract

Banyak industri berkembang di jaman sekarang, seperti industri pabrik pembuatan baterai, plastik, dan pigmen. Salah satu dampak dari limbah industri –industri tersebut adalah adanya pencemaran air oleh logam berat, misal logam kadmium yang banyak menimbulkan masalah sehingga perlu dikurangi jumlahnya dalam air. Untuk meminimalkan jumlah logam berat dalam air diperlukan sebuah proses pengolahan air dengan metode adsorpsi. Metode adsorpsi dapat dilakukan menggunakan media seperti zeolit, karbon aktif dan adsorben lainnya. Pengaktifan bahan dilakukan dengan menggunakan larutan NaOH 2% dengan cara memvariasi  waktu aktivasi (0 jam, 12 jam, 24 jam, 36 jam, dan 48 jam), pH larutan sampel (2,4,6, dan 8), dan waktu kontak (10 menit,20 menit, 30 menit, 40 menit, dan 50 menit). Tujuan dari penelitian ini menentukan model matematis yang terbaik untuk proses adsorpsi menggunakan limbah kulit nangka. Konsentrasi awal cadmium  sebesar 2,5 ppm. Analisis konsentrasi cadmium akhir dari sampel menggunakan AAS. Berdasarkan hasil percobaan sesuai dengan persamaan isotherm Langmuir dengan nilai konstanta a sebesar 44,56 dan konstanta b sebesar 0,00956.Kata kunci: adsorben, penjerapan kadmium, kulit nangka, model isotherm adsorpsi
Constant current-fuzzy logic algorithm for lithium-ion battery charging Muhammad Nizam; Hari Maghfiroh; Azis Ubaidilah; Inayati Inayati; Feri Adriyanto
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 13, No 2: June 2022
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v13.i2.pp926-937

Abstract

The lithium-ion (Li-ion) battery has a high demand because of its long cycle, reliability, high energy density, low toxic, low self-discharge rate, high power density, and high efficiency. However, lithium-ion batteries have sensitivity to over-charge, temperature, and charge discharge currents. The conventional battery charging system takes a very long time to charge which makes the battery temperature high. Therefore, a charger system that can maximize charging capacity, shorten charging time, and extend battery life is needed. In this study, a battery charging system was developed using the constant current–fuzzy (CC-fuzzy) control method. The aim is to get faster charging time and maintain battery life by limiting the battery charging temperature. The proposed charger system is dual mode which can be operated in both buck and boost mode. The experimental result shows that the proposed method is superior compared to the constant current constant voltage (CCCV) method in charging time. The CC-fuzzy method charging time is faster compared to the CCCV method by 25% and 12.5% in buck and boost modes, respectively. Whereas from the battery temperature, in buck mode, the proposed method has a lower temperature by 0.5 ⁰C and in the boost mode, each method has the same temperature.
Axial Unipolar Eddy Current Brake Performance Characteristics Against Heat Increase in Rotor Mufti Reza Aulia Putra; Dominicus Danardono Dwi Prija Tjahjana; Muhammad Nizam; Zainal Arifin; Bhre Wangsa Lenggana; Inayati Inayati
Automotive Experiences Vol. 6 No. 1 (2023)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.7431

Abstract

The development of transportation technology in the automotive sector such as electric vehicles is increasingly advanced. One technology that is needed quite a lot is the development of supporting technology for electric vehicle braking. The use of regenerative braking on light electric vehicles such as 2-wheeled vehicles is not efficient because of its low weight. The use of Eddy Current Brake (ECB) can be a solution for braking support needs. This is because the ECB is a braking system that has the advantage of a lightweight design but still relies on the frictionless principle. However, in addition to its advantages, the eddy current brake is still in the early stages of its research with efficiency that still needs to be developed. In the discussion of the ECB, heat generation is one of the interesting topics to be discussed. Specifically, the study of the characteristics of the unipolar ECB axial performance on heat generation events has not yet been discussed. So this article aims to discuss these events with a simulation process and simple mathematical calculations. Design optimization is done to get the best value. As a result, the use of eddy current brakes with conductor disks using slots, can improve the performance of the ECB on the torque side and cooling side. Thus, this article is a good contribution to the sustainability of ECB research in both the general and automotive fields.
Making an Electric Vehicle Charging System as a learning tool for the community About Electric Vehicles Adriyanto, Feri; Nizam, Muhammad; Anwar, Miftahul; Ramelan, Agus; Warindi, Warindi; Saputro, Joko Slamet; Inayati, Inayati
Jurnal Abdimas Vol 27, No 2 (2023): December 2023
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/abdimas.v27i2.48670

Abstract

The purpose of this service program is to introduce coomunity in Magetan Regency to electric vehicle technology. The material presented is basic material covering the meaning, benefits, and components of electric vehicles using developing charging system prototipe. people who visit the Refugia Garden are asked to immediately try the electric vehicle and after completion are asked to carry out the charging process themselves. By observing and trying it directly, it is hoped that the community's main set of electric vehicles will be formed as a way to reduce carbon emissions.The purpose of this service program is to introduce coomunity in Magetan Regency to electric vehicle technology. The material presented is basic material covering the meaning, benefits, and components of electric vehicles using developing charging system prototipe. people who visit the Refugia Garden are asked to immediately try the electric vehicle and after completion are asked to carry out the charging process themselves. By observing and trying it directly, it is hoped that the community's main set of electric vehicles will be formed as a way to reduce carbon emissions.
PENGUATAN KAPASITAS BENGKEL KONVERSI UNTUK MENDUKUNG PROGRAM KENDARAAN RAMAH LINGKUNGAN Mufti Reza Aulia Putra; Nizam, Muhammad; Adriyanto, Feri; Inayati, Inayati; Warindi, Warindi; Slamet Saputro, Joko; Anwar, Miftahul; Ramelan, Agus; Magfiroh, Hari; Brilianto Apribowo, Chico Hermanu
SEMAR : Jurnal Sosial dan Pengabdian Masyarakat Vol. 3 No. 3 (2025): Semar : Jurnal Sosial dan Pengabdian Masyarakat
Publisher : CV. Kalimasada Group

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59966/semar.v3i3.1992

Abstract

The capacity strengthening program for electric vehicle conversion workshops at SMK Karya Nugraha Boyolali was implemented through a synergistic collaboration model between universities, vocational schools, and industry. This study employed a qualitative descriptive approach with a case study method to evaluate the effectiveness of the six-month program. The findings revealed a significant improvement in participants’ technical competencies, as evidenced by the increase in pre-test and post-test scores, as well as the successful development of a solar photovoltaic (PV)-based electric vehicle charging station prototype. Beyond technical achievements, the program also strengthened multi-stakeholder collaboration and fostered the creation of a micro-scale clean energy ecosystem within the school environment. These results demonstrate that practice-based vocational training combined with strategic collaboration can make a substantial contribution to achieving the Sustainable Development Goals (SDGs), particularly clean energy (SDG 7), industry innovation (SDG 9), and climate change mitigation (SDG 13).
Pengaruh Konsentrasi Aktivator Asam Fosfat (H3PO4) pada Pembuatan Karbon Aktif dari Sabut Kelapa terhadap Adsorpsi Logam Kromium Sholikhah, Hamida Ishmatu; Putri, Hartika Rahma; Inayati, Inayati
Equilibrium Journal of Chemical Engineering Vol 5, No 1 (2021): Volume 5, No 1 July 2021
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v5i1.53572

Abstract

Abstrak. Kromium merupakan salah satu logam berat berbahaya yang terkandung dalam air limbah industri. Hal ini dapat dikurangi dengan berbagai metode, seperti adsorpsi. Penelitian ini bertujuan untuk menginisialisasi karbon aktif dari sabut kelapa dengan berbagai konsentrasi aktivator asam fosfat (H3PO4) (0,1M; 0,5M; 1M; 1,5M; 2M) dan variasi waktu kontak (30; 60; 90 ; 120; 150; 180 menit) untuk mendapatkan kapasitas adsorpsi krom yang optimum. Analisis karbon sabut kelapa aktif dengan SAA diperoleh luas permukaan 53,39 m2/g. Larutan kalium kromat (K2CrO4) diadsorpsi oleh adsorben kemudian dianalisis dengan Spektrofotometer UV-VIS untuk mengukur kandungan kromium. Penelitian ini membuktikan bahwa adsorpsi kromium oleh karbon aktif sabut kelapa semakin meningkat dari waktu ke waktu hingga mencapai kondisi optimum. Peningkatan kapasitas adsorpsi berbanding lurus dengan semakin pekatnya aktivator asam fosfat. Kapasitas adsorpsi maksimum yang diperoleh adalah 3.464 mg/g dan kondisi optimum pada waktu kontak 150 menit dengan konsentrasi aktivator asam fosfat 2M. Abstract. Chromium is one of the hazardous heavy metal contained in the industrial wastewater. It can be reduced by various methods, such as adsorption. The purpose of this study was initialized an activated carbon from coconut fiber by various phosphoric acid (H3PO4) activator concentration (0,1M; 0,5M; 1M; 1,5M; 2M) and variation of contact time (30; 60; 90; 120; 150; 180 minutes) to obtain optimum adsorption capacity of chromium. Analysis of the activated coconut fiber carbon by SAA obtained a surface area of 53,39 m2/g. The potassium chromate (K2CrO4) solution was adsorbed by the adsorbent and then analyzed by a UV-VIS Spectrophotometer to measure the chromium content. This study proved that chromium adsorption by activated coconut fiber carbon was increased by the time until reaching optimum condition. Enhancement of adsorption capacity was directly proportional as the more concentrated phosphoric acid activator. Maximum adsorption capacity obtained was 3,464 mg/g and the optimum condition was at contact time of 150 minutes with the phosphoric acid activator concentration of 2M.
Training of Electric Bike Assembly with Lithium Batteries at SMK Muhammadiyah 6 Karanganyar Paramitha, Tika; Dyartanti, Endah Retno; Widiyandari, Hendri; Jumari, Arif; Nur, Adrian; Inayati, Inayati; Budiman, Anatta Wahyu; Purwanto, Agus
Equilibrium Journal of Chemical Engineering Vol 5, No 1 (2021): Volume 5, No 1 July 2021
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v5i1.53965

Abstract

With the increasing development of the battery and electric vehicle industry, student's and teacher's understanding of lithium batteries and skills in assembling electric bikes are very important in competing for jobs in these fields. Educational activities regarding batteries and training on assembling electric bike are carried out at SMK Muhammadiyah 6 Karanganyar, because there were no facilities that support the learning and teaching process about electric vehicles and batteries. The method used in this training is lecture, discussion and practice method. The material presented was about the technology of making lithium batteries and electric bike components. While practical activities include the stages of converting conventional bikes into electric bikes with energy from lithium batteries. This activity shows that participants can understand batteries and can apply batteries to electric vehicles, especially electric bikes.
Hybrid Catenary-Battery Trains for Non-Electrified Sections and Emergency Use Muhammad Nizam; Hari Maghfiroh; Mufti Reza Aulia Putra; Anif Jamaluddin; Inayati Inayati
Automotive Experiences Vol. 8 No. 2 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.13440

Abstract

The hybrid catenary”“battery system offers a promising solution for railways operating in non-electrified sections and during emergencies, ensuring uninterrupted operation, enhanced safety, environmental sustainability, and cost efficiency. This study addresses the challenge of determining an appropriate battery size and introduces a novel rule-based Energy Management Strategy (EMS) with coasting mode to minimize energy consumption while meeting operational requirements. The novelty of this work lies in (i) a straightforward sizing method based on worst-case emergency scenarios and (ii) the integration of coasting-mode operation into a rule-based EMS for hybrid catenary”“battery trains. Simulation results show that the proposed approach achieves up to 12.56% energy savings on 3% gradient tracks while fully supplying auxiliary loads, compared with baseline operation that provides only partial coverage. These results demonstrate a practical and scalable framework for designing efficient, reliable, and resilient railway transport systems.
PEMBERDAYAAN PENGRAJIN GENTENG KELURAHAN KARANGGENENG BOYOLALI MELALUI IMPLEMENTASI MESIN FURNACE ELEKTRIK MENUJU TRANSFORMASI INDUSTRI RENDAH EMISI BERBASIS ENERGI BARU TERBARUKAN Mufti Reza Aulia Putra; Muhammad Nizam; Feri Adriyanto; Inayati Inayati; Warindi Warindi; Joko Slamet Saputro; Miftahul Anwar; Agus Ramelan; Hari Magfiroh; Chico Hermanu Brilianto
SEMAR : Jurnal Sosial dan Pengabdian Masyarakat Vol. 4 No. 3 (2026): SEMAR : Jurnal Sosial dan Pengabdian Masyarakat
Publisher : CV. Kalimasada Group

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59966/semar.v4i3.2845

Abstract

The roofing tile industry in Karanggeneng Village, Boyolali Regency, remains dependent on conventional firing systems using firewood, resulting in low thermal efficiency, unstable temperature distribution, inconsistent product quality, and relatively high carbon emissions. These limitations reduce production efficiency and hinder the competitiveness of small-scale roofing tile enterprises. This community service program aimed to empower local roofing tile craftsmen through the implementation of an electric furnace equipped with an insulated heating chamber, multi-level product racks, a controlled electrical heating system, and an operational training program. The program was conducted using a participatory approach consisting of problem identification, system design, prototype fabrication, installation, equipment handover, technical training, operational assistance, and evaluation. The implementation successfully produced an operational furnace prototype that provides more controlled heating conditions while improving craftsmen's understanding of equipment operation, electrical safety, and energy management. The collaboration between Universitas Sebelas Maret and community partners also strengthened knowledge transfer and technology adoption within the local industry. This community service contributes directly to Sustainable Development Goal (SDG) 4 by enhancing community competencies through technical education and training, and SDG 17 by strengthening partnerships among universities, local communities, and stakeholders to support sustainable industrial transformation.
Co-Authors Abdulloh Abdulloh Adelia Indah, Adelia Adrian Nur AGUS PURWANTO Agus Ramelan Anif Jamaluddin Anwar, Miftahul Arif Jumari Azis Ubaidilah Bhre Wangsa Lenggana Brilianto Apribowo, Chico Hermanu Budiman, Anatta Wahyu Chico Hermanu Brilianto Danardono Dwi Prija Tjahjana, Dominicus Endah Retno Dyartanti, Endah Retno Feri Adriyanto Fransisca Anita, Fransisca Hari Magfiroh Hari Maghfiroh Hendri Widiyandari Joko Slamet Saputro Magfiroh, Hari Miftahul Anwar Mufti Reza Aulia Putra Mufti Reza Aulia Putra Mufti Reza Aulia Putra Muhammad Nizam Putri, Hartika Rahma Ramelan, Agus Sholikhah, Hamida Ishmatu Tika Paramitha Warindi D Warindi Warindi Zainal Arifin Zanuar Bagus R