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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Jurnal Edukasi Elektro Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Jurnal Rekayasa Mesin BANGUN REKAPRIMA Journal of Applied Information, Communication and Technology (JAICT) Jurnal Sustainable: Jurnal Hasil Penelitian dan Industri Terapan Jurnal Abdimas Mandiri Eksergi: Jurnal Teknik Energi Jurnal Pengabdian Masyarakat Bangsa Engagement: Jurnal Pengabdian Kepada Masyarakat Jurnal Polimesin
Dwiana Hendrawati
Jurusan Teknik Mesin Politeknik Negeri Semarang
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Modified Maximum Power Point Tracking on Models of a 400 Wp Wind Power Plant Dwiana Hendrawati; Mulyono Mulyono; Wahyono Wahyono; Suwarti Suwarti; Nur Fatowil Aulia; Ariyanto Ariyanto; Brainvendra Widi Dinova
JAICT Vol 7, No 2 (2022)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jaict.v7i2.3917

Abstract

Many papers discuss the Maximum Power Point Tracking (MPPT) control simulation "Perturb and Observe" (P&O), while its realization and practice in control systems remains a major challenge. The purpose of this research to study experimentally by optimizing wind turbines PMSG connected to DC-DC converter (Boost) and resistive load. The proposed MPPT P&O control algorithm modification will be analyzed by comparing with the control method without MPPT P&O at various wind speeds. The 400 WP wind power generation system uses a boost converter simulated in MATLAB/Simulink to analyze the performance of the proposed control algorithm. Modified MPPT P&O control Wind Turbine system with 3 m/s – 7 m/s speed variation at 20 ohm to 60 ohm load, wind turbine power has been successfully improved by an average of 11.868% compared to Wind Turbines that are not installed MPPT P&O. Therefore, MPPT P&O is very suitable to be applied at low average wind speeds.
Turbin Angin Poros Horizontal Tipe Flat Sudu Banyak Taper 4:5 dan Sudut Keluaran 25° Sahid, Sahid; Mulyono, Mulyono; Prasetyo, Totok; Hendrawati, Dwiana; Safarudin, Yanuar Mahfud; Alyasa, Moh. Fani
Jurnal Rekayasa Mesin Vol 17, No 1 (2022): Volume 17, Nomor 1, April 2022
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v17i1.3086

Abstract

Penelitian ini bertujuan melakukan kajian terhadap kinerja turbin angin poros horizontal tipe flat sudu banyak, dimana sudu yang digunakan merupakan penggabungan model tapper 4;5 yang dikembangkan Herlambang (2019) dan model sudu dengan sudut keluaran 25°  yang dikembangkan Sahid (2020). Penelitian diawali dengan membuat 3 model sudu kemudian dipasang pada sistem uji kinerja pembangkit, langkah selanjutnya adalah melakukan uji karakteristik efisiensi terhadap putaran. Hasil uji ketiga model dikaji dengan membandingkan efisiensi masing-masing model. Hasil menunjukkan bahwa Turbin angin poros horizontal tipe flat sudu banyak taper 4:5 dan sudut keluaran 25° menghasilkan Efisiensi pada kecepatan 5 m/s dan 7 m/s, yaitu sebesar 4,253 % dan 1,947 %. Terjadi peningkatan dari model sudu taper 4:5 pada kecepatan 5 m/s dan 7 m/s yaitu masing-masing sebesar 75,38 % dan 91,13 %. Peningkatan efisiensi dari model sudu sudut keluaran 25° pada kecepatan 5 m/s dan 7 m/s sebesar 151,63 % dan 68,26 %. Pada kecepatan 9 m/s model sudu sudut keluaran 25° memiliki efisensi tertinggi, yaitu sebesar 1,087 % sehingga model sudu taper 4:5 mengalami penurunan efisiensi sebesar 7,37 %. Oleh karena itu turbin angin poros horizontal tipe flat sudu banyak taper 4:5 dan sudut keluaran 25° adalah model sudu yang paling cocok digunakan pada kecepatan angin ≤ 7 m/s. Model model sudu sudut keluaran 25° cocok digunakan pada kecepatan 9 m/s.
PENERAPAN TEKNOLOGI BIODIGESTER SKALA RUMAH TANGGA SEBAGAI SARANA PENDUKUNG PRODUKSI SUSU KAMBING DI KUNCEN FARM MIJEN Roihatin, Anis; Aulia, Nur Fatowil; Mulyono, Mulyono; Sahid, Sahid; Hendrawati, Dwiana; Prasetyo, Totok; Supriyo, Supriyo; Safaruddin, Yanuar Mahfudz
Bangun Rekaprima Vol. 10 No. 1 (2024): April 2024
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/bangunrekaprima.v10i1.5492

Abstract

Biogas is an environmentally friendly alternative energy source that is widely developed in society. Livestock waste is a source of biogas that is easy to obtain and the installation of digestion is easy, making biogas used by the community as an alternative to LPG. Kuncen Farm is a livestock farmer group that has a business cultivating dairy goats, fattening goats (Jawarandu Goats) and breeding Etawa goats. So far, goat manure waste is still managed conventionally, where only organic fertilizer is used for community agricultural needs and only makes up 30-50% of the total manure waste. Goat waste that is not used ends up being simply collected, producing an unpleasant odor and disturbing the environment. Based on the problems faced by Kuncen Farm and the potential of goat manure waste as a source of biogas, the application of biodigester technology on a household scale is a solution to goat manure waste as well as being a supporting facility for goat milk production at Kuncen Farm. This biodigester technology is made from PE plastic and utilizes used items around the house that can be used, such as used bottles, used stoves, motorbike tire rubber, etc. The main product in the form of biogas is used as fuel in gas stoves for goat's milk production and the by-product can be used as liquid fertilizer or organic compost which has economic value. This biogas stove can replace LPG fuel for cooking goat's milk. Furthermore, this biodigester technology can be installed on each group member.
Community Empowerment through Eco-Crowdinvesting in Green Business for Sustainable and Eco-Friendly MSMEs Kurnianingsih; Prasetyo, Totok; Hendrawati, Dwiana; Lathief, Muttabik Fathul; Saddewisasi, Wyati; Sahid
Engagement: Jurnal Pengabdian Kepada Masyarakat Vol 8 No 1 (2024): May 2024
Publisher : Asosiasi Dosen Pengembang Masyarajat (ADPEMAS) Forum Komunikasi Dosen Peneliti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29062/engagement.v8i1.1617

Abstract

The COVID-19 pandemic, coupled with climate change repercussions, has gravely impacted global economies, notably the MSMEs in Kelurahan Meteseh. These MSMEs, which play key roles in local tourism and cuisine, struggle with energy and capital issues. This community service program addresses these challenges by implementing a green economic ecosystem for these SMEs, leveraging digital platforms, and promoting environmentally friendly business operations. Methodologically, the project encompassed preparation, technology deployment and installation, technology transfer, and mentoring. To address these issues, a community service program introduced Eco-Crowdinvesting green business technology with solar panels to help MSMEs recover sustainably. Solar panels and the Eco-Crowdinvesting platform reduce operational costs, improve finance, and strengthen MSMEs, making energy affordable for them. In line with national digital and green economy strategies, this program gives MSMEs access to solar power and an innovative financing platform, strengthening their economic resilience, promoting sustainable business practices, and increasing environmental awareness.
Desiminasi Teknologi Tepat Guna Pada Kelompok Tani Sumber Rejeki Purwosari Guna Menambah Nilai Manfaat Buah Sukun Apriandi, Nanang; Margana, Margana; Hendrawati, Dwiana; Widyaningsih, Wiwik Purwati; Prasetiyo, Budhi; Suwarti, Suwarti; Mulyono, Mulyono; Wahyono, Wahyono; Aulia, Nur Fatowil; Kristiawan, Timotius Anggit; Yanuar, Padang; An-Nizhami, Avicenna
Jurnal Pengabdian Masyarakat Bangsa Vol. 1 No. 10 (2023): Desember
Publisher : Amirul Bangun Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59837/jpmba.v1i10.575

Abstract

Peningkatan nilai manfaat dari buah sukun salah satunya adalah melalui proses diversifikasi buah sukun menjadi tepung sukun. Proses pengolahan daging buah sukun menjadi tepung sukun harus melalui beberapa tahapan proses, satu diantara sekian tahapan yang paling krusial adalah proses pengeringan daging buah sukun. Hal ini dikarenakan proses pengeringan, khusunya pada pengeringan konvensional, sangat dipengaruhi oleh kondisi cuaca. Tujuan dari kegiatan ini adalah desiminasi teknologi tepat guna (TTG) berupa alat pengering berbahan bakar liquefied petroleum gas (LPG) guna menjawab permasalahan pengeringan konvensional yang sangat rentan terhadap perubahan cuaca. Mitra yang dilibatkan di dalam kegiatan ini adalah Kelompok Tani Sumber Rejeki Purwosari yang beralamat di Dk. Kedungjangan, Kelurahan Purwosari, Kecamatan Mijen, Kota Semarang. Metode kegiatan yang diterapkan adalah pendekatan Participatory Rural Appraisal (PRA) dengan target utama proses alih teknologi alat pengering. Hasilnya, kegiatan ini memberikan gambaran dan pengetahuan baru terhadap mitra tentang bagaimana teknologi pengeringan, mulai dari tahapan perencanaan, pembuatan, uji kinerja, dan juga perawatan peralatan. Desiminisai TTG berupa alat pengering mampu menjawab tantangan pengeringan konvensional yang bergantung pada kondisi cuaca.
Pendampingan IPTEK Eduwisata Ramah Lingkungan dan Peningkatan Produktivitas UMKM/UMKMK Menuju Terbangunnya Kampung Tangguh Mangunharjo Kota Semarang Aji, Nurseno Bayu; Totok Prasetyo; Kurnianingsih; Dwiana Hendrawati; Sahid
Jurnal Abdimas Mandiri Vol. 8 No. 3
Publisher : UNIVERSITAS INDO GLOBAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36982/jam.v8i3.4576

Abstract

Program "Kampung Tangguh" yang digagas oleh Pemerintah Kota Semarang di Kelurahan Mangunharjo bertujuan untuk mengatasi tantangan utama yang dihadapi oleh masyarakat setempat, yaitu: (1) menurunnya tingkat ekonomi masyarakat yang lahan tambaknya tak bisa digunakan lagi akibat rob banjir; (2) pengelolaan UMKM terkait manajemen, proses produksi, dan pengembangan pasar. Kelurahan Mangunharjo memiliki berbagai potensi yang dapat dimanfaatkan, diantaranya: (1) memiliki lahan milik Pemerintah yang luas, (2) hasil laut atau tambak yang melimpah, dan (3) terdapat UMKM dengan berbagai bidang usaha. Program ini berupaya memanfaatkan potensi tersebut dengan memperkenalkan Pembangkit Listrik Tenaga Surya (PLTS) dan Cold Storage. Dengan adanya PLTS, pasokan listrik yang stabil dapat dijamin, sehingga kualitas dan kuantitas produk yang disimpan oleh UMKM dapat ditingkatkan secara signifikan. Di sisi lain, strategi pemasaran berbasis internet diterapkan untuk memperluas jangkauan pasar produk UMKM, yang diharapkan dapat meningkatkan pendapatan dan keberlanjutan ekonomi mereka. Matching Fund 2023 mendukung implementasi tahap awal dari program ini, yang difokuskan pada penerapan teknologi PLTS berbasis IoT dan kecerdasan buatan yang diharapkan dapat meningkatkan kapasitas produksi UMKM, serta penyediaan alat produksi yang tepat guna bagi UMKM di Mangunharjo. Dengan dilaksanakannya pengabdian ini berhasil mengurangi biaya listrik produksi hingga 50% dan meningkatan kualitas penyimpanan produk yang dihasilkan dapat ditingkatkan hingga kapasitas 1,5-2 ton per harinya.
Performance Enhancement of 100WP Monocrystalline Solar Panel using Mirror Reflectors Dionova, Brainvendra Widi; Rahmanda, Ibnu Dwi; Putri, Arisa Olivia; Eteruddin, Hamzah; Pratama, Legenda Prameswono; Hendrawati, Dwiana; Abdulrazaq, Mohammed N.
Jurnal Edukasi Elektro Vol. 9 No. 2 (2025): Jurnal Edukasi Elektro Volume 9, No. 2, November 2025
Publisher : DPTE FT UNY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jee.v9i2.85796

Abstract

This research analyzes how the reflection of sunlight intensity affects the power generated by a 100WP monocrystalline solar panel with the addition of various reflector tilt angles. An experimental method was used to conduct this analysis by comparing three tests: a solar panel without a reflector, with a 60° angled reflector, and with a 75° angled reflector. Data was collected at one-hour intervals from 09:00 to 16:00 WIB, measuring parameters such as temperature, intensity, voltage, current, and power. The results showed that the addition of a flat mirror reflector significantly improved the performance of the solar panel. With a 75° tilt angle, the total power generated was 373.32W, compared to the total power generated at 60° of 366.93W and without a reflector of 208.62W. The highest power peak was achieved at 13:00 WIB with the 75° reflector at 69.31W. This research demonstrates that a reflector tilt angle of 75° is the most optimal for increasing the efficiency of monocrystalline solar panels as it distributes sunlight more evenly across the panel surface. The recommendation for future research is the utilization of software-based simulations and IoT integration for real-time monitoring, to strengthen experimental data validation and expand the application of this technology at both industrial and household scales.
EVALUASI KINERJA AIR-COOLED WATER CHILLER DENGAN KAPASITAS 594 kW Laksana, Kurnia Adam; Aulia, Nur Fatowil; Hendrawati, Dwiana
Eksergi Vol. 17 No. 3 (2021): SEPTEMBER 2021
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (580.066 KB) | DOI: 10.32497/eksergi.v17i3.2982

Abstract

Kinerja mesin Air-Cooled Water Chiller (ACWC) harus memenuhi standar SNI 03-6390-2020, yaitu minimal COP 3 dan konsumsi energy minimal 1,172 kW/TR. Untuk pemenuhan standar tersebut, dilakukan evaluasi kinerja terhadap ACWC kapasitas 594 kW. Tahap awal evaluasi adalah pengukuran temperatur (input dan output) air di evaporator dan daya listrik pada kompresor pada mesin chiller. Pengambilan data dilakukan untuk sekali siklus dan temperatur output air antara 11oC -15oC. Dengan perhitungan diperoleh beban pendinginan (Net Refrigeration Capacity) sebesar 97,003 TRatau 341,158 kW, daya kompresor sebesr 212,483 kW, konsumsi energi 2,203 (kW/TR) dan COP sebesar 1,605. Tahapan selanjutnya adalah membandingkan COP aktual dan konsumsi energi sesuai standar. Hasil analisis menunjukan bahwa rata-rata COP dari 7 siklus sebesar 2,203, sedangkan konsumsi energi adalah 2,203 kW/TR. Nilai COP tidak memenuhi standar diakibatkan mesin chiller bekerja dengan beban 57,43% dari kapasitas pabrikan.
Evaluation Of Refrigerating Load And Air Flow Performance In Air Conditioning Unit at Hospital Z Aulia, Nur Fatowil; Hendrawati, Dwiana; Hanif, Muhammad; Mei H, Baktiyar; Hamim S, Ahmad; Sumarno, F. Gatot; Surindra, M. Denny
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.v19i01.4253

Abstract

This research was conducted to evaluate air conditioning systems in pharmaceutical warehouses against the ANSI/ASHRAE/ASHE ventilation standards 170 ”“ 2008 and SNI-03-6572-2001. The method used is to calculate the cooling load on the FCU (Fan Coil Unit) using the CLTD (Cooling Load Temperature Difference) method and calculate the External Static Pressure on the ducting system. The analysis is carried out by comparing the results of calculating the FCU requirements with the actual specifications that have been implemented. Furthermore, the measurement results of the existing room air condition are compared with the standards for pharmaceutical warehouse applications. The calculation results show that the pharmaceutical warehouse has a cooling load of 47,472.72 Btu/hr, and has an external static pressure of 123 Pa. While the selected FCU (Fan Coil Unit) has a capacity of 78,771 Btu/hr and a maximum external static pressure of 130 Pa with a rated airflow of 4000 m3/hr. After 9 years of use, it is known that the rated airflow has decreased by around 37% of the FCU capacity. Existing room air conditions obtained the extreme temperature and RH of 23.36 °C and 72%, respectively.
Design and Simulation of Asynchronous Buck Converter using Fuzzy Logic Controller (FLC) Hutagalung, Nirmalasari; Dionova, Brainvendra Widi; Hendrawati, Dwiana
Eksergi Vol. 20 No. 02 (2024): MAY 2024
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v20i02.5804

Abstract

Currently, Indonesia's energy is running out andhas received serious attention so the Government targets thatby 2050 the role of renewable energy will be at least 31%. Thisencourages the production of various alternative energysources that are environmentally friendly and available, suchas solar power plants. However, solar intensity and a dynamicenvironment strongly influence the output power generated bysolar panels. So in this research, an asynchronous buckconverter design using MPPT will be made to track themaximum power point of solar panels with the fuzzy logiccontroller method which will be applied to Monocrystallinesolar panels with a capacity of 300WP. Fuzzy MPPT will adjustthe duty cycle by PWM Arduino Nano on the asynchronousbuck converter to keep reaching the maximum power point.The results show that the developed system can increase powerconversion efficiency and maintain output voltage stabilityunder various operational conditions. The implementation ofFLC as MPPT on Asynchronous Buck Converter successfullyoptimizes the power absorbed from solar panels, thussupporting the reduction of electrical energy consumption fromPLN in the Jakarta Global University student associationsecretariat building. This implementation is expected to be areference for the implementation of a smarter and moresustainable energy management system in the future.
Co-Authors - Sahid, - . Sahid . Suwarti A.A. Ketut Agung Cahyawan W AA Sudharmawan, AA Abdulrazaq, Mohammed N. Adi Soeprijanto Agus Hendroyono Agus Hendroyono, Agus Aji, Ferro Alyasa, Moh. Fani Aminuyati An Nizhami, Avicenna Anis Roihatin Annisa Dewi Agustin Arisa Olivia Putri Aulia, Nur Fatowil Brainvendra Widi Dionova Budhi Prasetiyo Budhi Prasetyo Dina Mariani Efendi, Erwan Tri F. Gatot Sumarno, F. Gatot Fachry Abda El Rahman Ferandez, Aggie Brenda Hamim S, Ahmad Hamzah Eteruddin Hermawan, Baktiyar Mei Hutagalung, Nirmalasari Kurnianingsih Kurniawan Aldy Kusuma Kusuma Dewi, Astrie Laksana, Kurnia Adam Lathief, Muttabik Fathul Legenda Prameswono Pratama Machrus Ali Mei H, Baktiyar Mochamad Ashari Mochammad Denny Surindra Muhammad Hanif Mulyono Mulyono Mulyono Mulyono Nanang Apriandi Nur Fatowil Aulia Nurin Hamdani, Chalidia Nurrohmah, Hidayatul Nurseno Bayu Aji, Nurseno Bayu Padang Yanuar Rahmanda, Ibnu Dwi Ravy, Javier Umar Saddewisasi, Wyati Safaruddin, Yanuar Mahfudz Safarudin, Yanuar Mahfud Sahid Sahid Sahid Samaratungga, Langga Soedibyo Soedibyo Sudjito Soeparman Sudjito Sudjito Supriyo Supriyo Suwarti Suwarti Suwarti Suwarti Suwarti Suwarti Timotius Anggit Kristiawan Totok Prasetyo Totok Prasetyo Wahyono Wahyono Wahyono Wahyono Wardhana, Asepta Surya Wigiantoro Wigiantoro Wiwik Purwati Widyaningsih Yanuar Mahfudz Safarudin Yusuf Dewantoro Herlambang Zahro, Nabila Aida Az