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All Journal Seminar Nasional Aplikasi Teknologi Informasi (SNATI) Transmisi: Jurnal Ilmiah Teknik Elektro AUSTENIT YOUNGSTER PHYSICS JOURNAL Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Jurnal Rekayasa Mesin JURNAL INTEGRASI Syntax Literate: Jurnal Ilmiah Indonesia Jurnal Agrotek UMMat Jurnal Inovator Andalasian International Journal of Applied Science, Engineering, and Technology International Journal of Research in Vocational Studies (IJRVOCAS) Automotive Experiences Eksergi: Jurnal Teknik Energi Jurnal Hilirisasi Technology kepada Masyarakat (SITECHMAS) Inclusive Society and Sustainability Studies (ISSUES) Jurnal Pengabdian Masyarakat Bangsa Journal of Mechanical Engineering and Applied Technology Jurnal Polimesin International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS) Journal of Mechanical Engineering and Fabrication

Yusuf Dewantoro Herlambang

Politeknik Negeri Semarang

Author-ID : 2770526

Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology 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 Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Solar radiation monitoring system for electric vehicle charging using solar modules based on the Internet of Things Herlambang, Yusuf Dewantoro; Huda, Muhamad Nurul; Antoro, Daffa Yudha Akbar Putra; Ghozali, Hanif Faizal; Setyawan, Martando Robby; Apriandi, Nanang Apriandi; An-Nizhami, Avicenna; Yanuar, Padang; Riadini, Elfrida Rizky; Marliyati, Marliyati
Journal of Mechanical Engineering and Fabrication Vol. 2 No. 1 (2025): Maret
Publisher : Journal of Mechafa Engineering and Fabrication

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.64273/jmef.v2i1.17

The utilization of solar energy to support electric vehicle charging still faces challenges related to efficiency and real-time solar radiation monitoring. Addressing this issue is critical given the importance of optimizing renewable energy to facilitate the transition toward sustainable transportation. This study offers a solution through the development of an Internet of Things (IoT)--based solar radiation monitoring system capable of measuring solar light intensity in real time. The system employs a BH1750 sensor integrated with an ESP32 microcontroller to process data, transmit it to the Firebase Realtime Database, and display it via an Android application. The methodology encompasses the design, implementation, and testing of the system on an electric vehicle placed in an open area for 10 hours of observation. Results indicate that the highest light intensity, recorded at 98,321 lux, corresponded to solar radiation of 776.74 W/m², while the lowest light intensity, 69 lux, resulted in radiation of 0.55 W/m². The implications of this research include enhanced efficiency in electric vehicle charging, the advancement of IoT-based solar energy systems, and the potential integration with energy storage technologies and predictive algorithms to improve energy sustainability.

PEMBANGKIT PANAS BUMI KAPASITAS 2 KW MEMANFAATKAN SISTEM ENTHALPI RENDAH UNTUK APLIKASI SISTEM OFF-GRID Herlambang, Yusuf Dewantoro; Harmoko, Udi; Widodo, Achmad; Yulianto, Gatot; Widada, Sugeng; Sahid, Sahid
Eksergi Vol. 17 No. 1 (2021): JANUARI 2021
Publisher : Politeknik Negeri Semarang

PLTP siklus biner merupakan salah satu solusi alternatif pemanfaatan panas bumi yang memanfaatkan sistem entalpi rendah. Skala percobaan pembangkit listrik siklus biner bertujuan untuk mengembangkan kemungkinan penggunaan tidak langsung dari sistem panas bumi entalpi rendah di situs Diwak. Unit ini adalah sistem siklus biner 2 kW yang terdiri dari empat komponen utama: evaporator, turbin, kondensor, dan sistem pendingin. Refrigeran R134a dipilih sebagai fluida biner karena kinerja yang diinginkan dan kemudahan ketersediaan di area lokal. Panas ditransfer ke fluida biner di sistem evaporator dengan loop ekstraksi termal. Pendinginan disuplai ke pipa ganda kondensor kemudian diedarkan sebagai loop pada sistem menara pendingin. Turbin putar digunakan sebagai ekspander untuk mengekstraksi pekerjaan dari sistem dan diumpankan oleh evaporator bertekanan tinggi. Sistem telah dirancang dan dibangun dan sekarang siap untuk komisioning dan pengujian.

OPTIMALISASI ARAH SUDUT TILT DAN SUDUT AZIMUTH DARI ALAT PEMANEN ENERGI RADIASI MATAHARI DI SEMARANG, JAWA TENGAH Sutanto, Bayu; Herlambang, Yusuf Dewantoro; Bono, Bono; Alfauzi, Abdul Syukur; Munawwaroh, Dita Anies
Eksergi Vol. 17 No. 2 (2021): MEI 2021
Publisher : Politeknik Negeri Semarang

Energi surya merupakan sumber energi terbarukan yang sangat optimal untuk dikembangkan dan telah menarik banyak perhatian baik dari para peneliti maupun pemerintahan. Penelitian ini bertujuan untuk mengidentifikasi sudut kemiringan (tilt/slope angle) dan orientasi arah (azimuth angle) dari suatu alat pemanen energi surya untuk mendapatkan nilai radiasi maksimum pada sepanjang tahun di daerah Semarang, Jawa Tengah. Lokasi yang digunakan sebagai basis data untuk menghitung arah sudut optimum ini dipilih di Politeknik Negeri Semarang yang berkoordinat di 7 °03'13.4" (7.053715 °) Lintang Selatan dan 110 °26'06.8" (110.435220 °) Bujur Timur. Metode perhitungan dari sudut-sudut matahari dan koordinat di bumi digunakan untuk mendapatkan nilai estimasi radiasi matahari. Hasil penelitian menunjukkan bahwa sudut kemiringan optimum sepanjang tahun berada pada kisaran 0 ”“ 30.14 ° dengan orientasi arah ke utara dan pada kisaran sudut kemiringan 0 ”“ 16.00 ° dengan orientasi arah ke selatan. Sedangkan untuk pemasangan menggunakan sudut konstan sepanjang tahun, nilai optimum dicapai pada sudut kemiringan 6.99 ° dengan orientasi menghadap ke utara.

Analysis of Hybrid System in the Photovoltaic and Photothermal Technology Sutanto, Bayu; Munawwaroh, Dita Anies; Bono, Bono; Herlambang, Yusuf Dewantoro; Sumarno, F Gatot; Alfauzi, Abdul Syukur
Eksergi Vol. 19 No. 01 (2023): JANUARY 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v19i01.4191

The utilisation and optimisation of solar energy have a vital role in reducing the global need for conventional fossil energy. Moreover, it is also clean and eco-environmentally energy resources. The photovoltaic-thermal (PV-T) hybrid system that combines photovoltaic and photothermal technology is an ideal solution for creating high-efficiency energy conversion devices. In addition, this system can be constructed to be small and compact with a higher economic value than the conventional technology from the previous solar energy harvesters. This paper will review the PV-T hybrid system and provide the thermodynamic analysis and the feasibility study.

The Newton Model for Seaweed Drying: An Investigation of a Cabinet Dryer Using Biomass Energy Zulhan Widya Baskara; Apriandi, Nanang; Herlambang, Yusuf Dewantoro; Khoryanton, Ampala; Safarudin, Yanuar Mahfudz; Widya Baskara, Zulhan; Raharjanti, Rani
Eksergi Vol. 19 No. 01 (2023): JANUARY 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v19i01.4211

This study investigates the viability of employing a cabinet-type dryer with a heat energy source derived from biomass combustion to dry Eucheuma sp. using Newton's model. In this investigation, seaweed was dried with air at a temperature of 55 °C. A reduction in water content of 8.1% was attained after six hours of drying. To make the data fit the suggested drying mathematical model, the data were examined and recorded. The model feasibility test shows that, with a coefficient of determination (R2) that is close to one and corrected at 0.9502, the Newton model can be used to predict the moisture content of dried seaweed after the drying process using a cabinet-type dryer with a source of heat energy from biomass combustion.

Utilization of Welding Electrode Waste To Purify Biogas From Hydrogen Sulfide Impurities Kristiawan, Timotius Anggit; Apriandi, Nanang; herlambang, Yusuf Dewantoro; Setiyawan, Trio; Wibowo, Andryana Dwiandara
Eksergi Vol. 19 No. 2 (2023): MAY 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v19i2.4451

Abstract”” The biogas desulphurization process has a crucial role in the widespread use of biogas due to the toxic and corrosive nature of the element hydrogen sulfide on equipment. This study investigated the potential use of waste welding electrodes as a biogas purification medium. Variables in the form of feed biogas flow rates of 1, 2, and 3 liters/minute were studied for their effects. As a result, the most optimum performance was obtained in the test with a feed biogas flow rate of 1 liter/minute, with an average reduction percentage of hydrogen sulfide content in the biogas of 27.12%.

Shell and Tube Heat Exchanger Design: Utilization of Wasted Energy in Air Conditioning Systems Apriandi MS, Nanang; Herlambang, Yusuf Dewantoro; Alfauzi, Abdul Syukur; Lee, Shun-Ching
Eksergi Vol. 19 No. 2 (2023): MAY 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v19i2.4461

This research aims to design a simple Shell and Tube (one pass) heat exchanger for applications in recovering wasted heat from air conditioning systems in the hospitality industry. The Tubular Exchanger Manufacturers Association (TEMA) standard is used as a reference in the design of heat exchangers in order to obtain the dimensional specifications of the device. In addition, mathematical calculations based on the technical properties of the working fluid are carried out with the help of the Microsoft Excel application to obtain values from other parameters in the design. The results showed that the designed heat exchanger met the standards in terms of device effectiveness. The heat exchanger has 152 tubes with an effective value of more than 90% with an impurity factor of 0.014. A high tool effectiveness value indicates a good heat exchanger performance. The results of this planning and design are expected to be a reference in designing an effective heat exchanger with high reliability.

Performance of Photovoltaic as Pump Drive for Alternator Characteristic Monitoring System Herlambang, Yusuf Dewantoro
Eksergi Vol. 19 No. 03 (2023): SEPTEMBER 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v19i03.5068

The objectives of this research to generate electrical energy by making photovoltaic which utilizes the potential of solar radiation sources to drive the pump. There are 2 monocrystalline solar panels installed with a capacity of 100 Wp. Installation of solar panels at an angle of 7 ° based on geographic location in the Tambakboyo, Ambarawa, -7.263239"(Latitude) South Latitude and 110 °42'06.82 (Longitude) East Longitude. The test is carried out by turning on the pump for 1 hour within a period of time until 7 days. The parameters measured in the test are solar radiation data (W/m ²), voltage (V) and current (A) input from solar panels, battery input voltage, voltage and current input from the inverter, as well as the output voltage and current from the inverter. The results of test obtained the highest efficiency value of 12.854% at a voltage of 12.58 V and a current of 10.4 A.

Analysis of the Impact of Load Change on the Efficiency of the Heat Exchanger on Closed-circuit Cooling Water with a Capacity of 300 MW Nabila, Lathifa Dylla; Apriandi, Nanang; Herlambang, Yusuf Dewantoro; Surindra, Mochamad Denny
Eksergi Vol. 20 No. 01 (2024): JANUARY 2024
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v20i01.5411

Electricity has become one of the most crucial components of life. The steam power plant (PLTU) is the most significant contributor to the power supply process in Indonesia, with an installed capacity of 29.57%. A review of each component is required to support the sustainability of the production process at PLTU. This research discusses the heat exchanger's components in the refrigeration system at PT. XYZ. The cooling system in PLTU plays a vital role in preventing overheating of the power plant components, which can cause an interruption of the energy generation process. Following this, research was carried out on the influence of load changes on the efficiency of heat exchangers in PT. XYZ cooling systems using observation methods, interviews, and literature studies. Such methods produced data that could be used to calculate the efficiency value. From the results of the investigation, it was concluded that the performance of the PT. XYZ heat exchanger was at its best at maximum load with an efficiency presentation of 68.29% and at its lowest at minimum load with an effectiveness presentation of 59.95%. However, the value was still below the standard value of efficiency of the heat exchangers, which is 75%, so it required more intensive treatment to improve its efficiency value.

Unjukkerja Panel Surya Tipe Terapung untuk Pembangkit Listrik Herlambang, Yusuf Dewantoro; Prasetiyo, Budhi; Wahyono, Wahyono; Apriandi, Nanang; Marliyati, Marliyati; Sutanto, Bayu
Jurnal Rekayasa Mesin Vol. 18 No. 3 (2023): Volume 18, Nomor 3, Desember 2023
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v18i3.5069

Penerapan Pembangkit Listrik Tenaga Surya (PLTS) membutuhkan lahan/daratan yang memiliki nilai ekonomis, padahal Indonesia merupakan negara tropis yang memiliki potensi energi surya dan negara kepulauan dengan luas sebesar 2/3 berupa perairan dan danau di daratan yang bisa dimanfaatkan untuk pembangkit energi surya. Pemanfaatan PLTS terapung tidak memerlukan lahan/daratan, dapat mengurangi evaporasi, serta sebagai media pendingin modul PV untuk meningkatkan efisiensi. Tujuan penelitian ini adalah merancang sistem PLTS pada kolam budidaya dengan memanfaatkan sumber energi surya. Penelitian dimulai dengan mengukur potensi energi matahari selanjutnya perancangan dan pemilihan komponen yang memiliki kapasitas sesuai. Setelah melakukan beberapa pengamatan di daerah tersebut, PLTS yang cocok digunakan untuk menghidupkan aerator adalah PLTS off grid. PLTS 200 Wp mampu untuk menghidupkan aerator 120 W selama 12 jam pada siang hari dan aerator 100 W selama 8 jam pada malam hari. Pada kondisi pengosongan baterai, tegangan output panel rata-rata sebesar 12,89 V dan arus rata-rata sebesar 6,2 A dan pada kondisi pengisian baterai, tegangan output panel rata-rata sebesar 12,39 V dan arus rata-rata sebesar 6,6 A. Efisiensi sistem tertinggi pada kondisi pengosongan baterai sebesar 99%. Hal ini dikarenakan pada sore hari radiasi matahari rendah sehingga arus yang dihasilkan panel surya rendah dan mendapatkan supply dari baterai.

Co-Authors - Suwarti, - . Sahid . Wahyono A Fauzi, Abdul Syukur Achmad Widodo Adiba, Azka Fikral Ahmad Hamim Su’udy Al Huda, Luqman Alfauzi, Abdul Syukur AM Mufarrih Aminuyati Amrullah, Utsman Syah An Nizhami, Avicenna Andreas Wahyu Gunawan Anis Roihatin Annisa Dewi Agustin Antoro, Daffa Yudha Akbar Putra Anwar, Muhammad Khaerul Apriandi MS, Nanang Apriandi, Nanang Apriandi Apriansyah, Icvan Aris Fiatno Arnoldi, Dwi Azharuddin Balqis Balqis Bayu, Tatar Bono . Bono Bono Budhi Prasetiyo Budhi Prasetiyo Carlos R. S. Dianisa Khoirum Sandi Dicky Septrianto Diny Agustina Rahayu Dr. Fatahul Arifin, S.T., Dipl.Eng.EPD., M.Eng.Sc Dwi Arnoldi, S.T., M.T. Dwiana Hendrawati Effendi, Sairul Elfrida Rizky Riadini Elhas, Rivan Ma’rivan Ella Sundari, S.T., M.T. Eri Prihatmini Evan, Bah F Gatot Sumarno, F Gatot F. Gatot Sumarno, F. Gatot Fachry Abda El Rahman Fatahul Arifin Fatahul Arifin Fatahul Arifin, Fatahul Feby Agasa Fenoria Putri, S.T., M.T. Franando, Franando Gatot Suwoto Gatot Yulianto Ghozali, Hanif Faizal Gustaf Susetyo Hadi, Kms. M. Hairul Hartanto, Jimmy Hermawan, Baktiyar Mei Hindrawati, Gita Huda, Muhamad Nurul Inayah Inayah Iwan Hermawan Iwan Setiawan Khoiri Rozi Khoirunnisa, Hilma Khoryanton, Ampala Khusna, Atina Nurul Kurnianingsih Kurnianingsih, Kurnianingsih Kurniawan Kurniawan Aldy Kusuma Lee, Shun-Ching Lusiana Rahmawati Margana Margana Marliyati Marliyati Marliyati, Marliyati Mars Widodo Mochammad Denny Surendra Mochammad Denny Surindra Mochammad Facta Muhammad Arif Fadilah Muhammad Ikbal Muhammad Latifur Rochman Muji Setiyo Mulyono Mulyono Munawwaroh, Dita Anies Nabila, Lathifa Dylla Nafisah Amalia Nanang Apriandi Nanang Qosim Nandiyaguna Yusarindra Negara, Komang Metty Trisna Ningrum, Siti Mardiyanti Ningtias, Dieta Wahyu Asry Novarika, Wirda Nursaputro, Septiantar Tebe Padang Yanuar Padang Yanuar Pambudi, Yoyok Dwi Setyo Prasetya, Valendry Naufal Purwanto, Wawan Putri, Farika Tono Putri, Mega Purnama R, Rizky Amelia Rachman, Iqo Yovie Raditya Rizqy Wibowo Radjiq, Akhmad Ramadoni, Ramadoni Rani Raharjanti Rasid, M. RD. Kusumanto RM. Fauzi Romi Wilza Rr. Tony Yulianto Rusdianasari Sahid Sahid Sai'in, Ali Satito, Aryo Setiyawan, Trio Setyawan, Martando Robby Setyowati, Nur Shyu, Jin Cherng Siti Zulaikhah Slamet Priyoatmojo, Slamet Sudjito Soeparman Sudjito Sudjito Sugeng Widada Sugiono, Friska Ayu Fitrianti Supandi supriyo supriyo Supriyo Supriyo Supriyo Supriyo Suseno, Sigit Sutanto, Bayu Suwarti Suwarti Suwarti Suwarti Syahputra, Angga Panjy Teguh Aji Wibowo Teguh Harijono Mulud Teguh Harijono Mulud Timotius Anggit Kristiawan Udi Harmoko Vita Ayu Aspriyanti Wahyono Wahyono Wahyu Isti Nugroho Wahyu Sulistiyo Wahyu Triharto Prabowo Wahyuni, Puri Wibowo, Andryana Dwiandara Widhaninggar, Diana Fika Widodo, Ignatius Gunawan Wigiantoro Wigiantoro Willy Ravindo H Damanik Wilza, Romi Wiwik Purwati Widyaningsih Yahya Yanuar Mahfudz Safarudin Yehuda Tofan Indra Cahya Yosintaska Yosintaska Yudha Ramadhan Yusi Amalia Renaningtyas Zainal Abidin Zakaria Zakaria Zakki Fuadi Emzain Zamheri, Ahmad Zulhan Widya Baskara

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