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Energy analysis of active photovoltaic cooling system using water flow Kristi, Ant. Ardath; Susanto, Erwin; Risdiyanto, Agus; Junaedi, Agus; Darussalam, Rudi; Rachman, Noviadi Arief; Fudholi, Ahmad
International Journal of Electrical and Computer Engineering (IJECE) Vol 15, No 1: February 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v15i1.pp1-14

Abstract

An active water-cooling system is one of several technologies that has been proven to be able to reduce heat losses and increase electrical energy in photovoltaic (PV) module. This research discusses a comparative experimental study of three pump activation controls in cooling of PV module with the aim of evaluating specifically the PV output power, net energy gain, water flow rate, and module temperature reduction. The three pump activation controls being compared are continuously active during the test, active based on setpoint temperature, and active by controlling the pump voltage using pulse width modulation (PWM) control in adjusting water flow rate smoothly. The results show that controlling the pump voltage using PWM in the PV cooling process produces energy of 437.95 Wh, slightly lower than the others and the average module cooling temperature is 35.24 °C, higher of 1-3 °C than the others. Nevertheless, PWM control of cooling pump has resulted the percentage of net energy gain of 9.94%, greater than other controls, and with an average flow rate of 2.17 L/min, more efficient than the others. Thus, this control is quite effective as it can produce higher net PV energy yield and lower water consumption.
The effect of Problem-based Learning (PBL) with mockup media in learning programmable logic controller Suhanto, Suhanto; Mustaji, Mustaji; Rifai, Moch.; Moonlight, Lady Silk; Soleh, Asep Muhamad; Fudholi, Ahmad
Jurnal Pendidikan Vokasi Vol 14, No 1 (2024): February
Publisher : ADGVI & Graduate School of Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jpv.v14i1.64622

Abstract

This research aims to (1) examine the differences in learning outcomes of programmable logic controllers between cadets who use problem-based learning strategies assisted by mockup media and problem-based learning strategies, (2) examine the differences in learning outcomes of programmable logic controllers between cadets who have high and low initial abilities, and (3) examine the interaction effect between learning strategies and initial abilities on learning outcomes of programmable logic controllers. This research uses a 2 x 2 factorial design with the object of research being the 3rd-semester airport electrical engineering study program students at Aviation Polytechnic Surabaya. The sample of this research includes 47 students of the TLB 11 AB class as the experimental group of problem-based learning strategy assisted by mockup media and 46 students of the TLB 12AB class as the control group of problem-based learning strategy. A learning outcomes test collected the data on learning outcomes in the form of multiple choice. Learning outcomes data were analyzed using two-tailed ANOVA (analysis of variance). The results showed that there is a significant difference in learning outcomes of the programmable logic controller between cadets who learn using problem-based learning assisted by mockup media and problem-based learning, there is a significant difference in learning outcomes of the programmable logic controller between cadets who have high and low initial abilities, there is no interaction effect between learning strategies and cadets' initial abilities on learning outcomes of the programmable logic controller. This research can contribute to improving students' understanding and skills in the field of PLC. Through practical experience and relevant projects, students can develop a deeper understanding of PLC concepts and improve their technical skills in designing, implementing, and solving problems related to PLC systems.
PERISTIWA PERANG BADAR: PERTEMPURAN BERSEJARAH YANG MENGUBAH ARAH PERADABAN ISLAM sa'adah, Nila; rifa'i, Muhammad; Fudholi, Ahmad; Azizatun Nikmah, Nur Sani; Kurniawan, Syamsul
PENDIDIKAN SAINS DAN TEKNOLOGI Vol 12 No 2 (2025)
Publisher : STKIP PGRI Situbondo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47668/edusaintek.v12i2.1549

Abstract

Pertempuran Badar adalah peristiwa penting dalam sejarah awal Islam yang memiliki karakter kompleks dan dampak luas terhadap dinamika sosial-keagamaan. Peristiwa ini terjadi pada tanggal 17 Ramadan tahun ke-2 Hijriah (13 Maret 624 Masehi) dan menjadi salah satu momen paling berpengaruh dalam pembentukan identitas komunitas Muslim. Penelitian ini mengadopsi pendekatan interdisipliner untuk mengeksplorasi aspek-aspek utama dari pertempuran tersebut, meliputi konteks sosial-politik, taktik militer, serta dampak psikologis dari konfrontasi antara 313 pejuang Muslim melawan 1.000 pasukan Quraisy. Dengan menggunakan metode kualitatif dan analisis sejarah kritis, penelitian ini berupaya memahami bagaimana Nabi Muhammad secara cerdas menggabungkan elemen spiritual dengan strategi militer. Beliau mampu mengubah kekurangan jumlah menjadi keunggulan strategis yang menentukan kemenangan. Temuan penelitian menunjukkan bahwa Pertempuran Badar tidak hanya sekadar peristiwa militer, melainkan juga katalis untuk transformasi sosial yang lebih besar. Pertempuran ini membantu membentuk ulang identitas kolektif umat Muslim, mengintegrasikan nilai-nilai kesetaraan, persatuan antar-suku, dan dedikasi spiritual sebagai fondasi komunitas. Selain itu, Pertempuran Badar meruntuhkan struktur sosial tradisional yang berbasis hierarki dan menggantikannya dengan sistem yang lebih egaliter. Signifikansi penelitian ini terletak pada kemampuannya untuk melampaui interpretasi sederhana terkait pertempuran tersebut, dengan menawarkan perspektif multidimensional yang lebih mendalam. Studi ini memberikan pemahaman yang lebih luas mengenai dinamika konflik, kepemimpinan yang visioner, serta pembentukan identitas keagamaan pada masa awal Islam.
PERFORMANCE OF LOW-COST SOLAR WATER HEATER Ridwan, Abrar; Abdurrahman, Ridwan; Fudholi, Ahmad
JURNAL SURYA TEKNIKA Vol. 9 No. 1 (2022): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v9i1.3761

Abstract

This study investigated the performance of a low-cost solar water heater (SWH). The SWH consists of a solar collector with a simple flat plate thermosiphon and water tank. The solar collector has, a glass cover, painted black on an aluminium absorber plate, water pipes and the sides insulated. During the testing process, the temperatures in the SWH were recorded at 1-second intervals by using Advantech Software DAQ Navi Data Logger, which is connected to a laptop via USB-4718, 8-Channel Thermocouple Input Module. The results that the efficiency of the solar collector ranged from 5% to 23%, with an average of 16% at water flow rate of 0.0019 kg/s. In addition, the time required by low-cost SWH to heat the water in a tank of 20 liters to reach its maximum temperature of 48.3°C is 8 hours 36 minutes
Photovoltaic thermal (PVT) air collector with monofacial and bifacial solar cells: a review Fudholi, Ahmad; Mustapha, Muslizainun; Taslim, Ivan; Aliyah, Fitrotun; Gani Koto, Arthur; Sopian, Kamaruzzaman
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 10, No 4: December 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (369.742 KB) | DOI: 10.11591/ijpeds.v10.i4.pp2021-2028

Abstract

Photovoltaic thermal (PVT) collectors directly convert solar radiation into electrical and thermal energy. A PVT collector combines the functions of a PV panel and a flat plate solar collector. The development of PVT air collectors is a very promising research area. At present, PVT air collectors are used in solar drying and solar air heaters. On the basis of existing literature, most PVT air collectors were built by using monofacial PV modules. The bifacial PV modules had two active surfaces that could capture solar radiation with its front and rear surfaces. Additional sunlight absorption through both surfaces resulted in an enhanced electrical power generation compared with the conventional monofacial PV. Therefore, bifacial PVT was considered to be useful and attractive due to its potential of enhancing overall system performances, including energy and exergy efficiencies. Findings of this review indicated that PVT air collector with bifacial solar cell produced a larger amount of electrical energy, which was approximately 40% higher than a monofacial PVT. The energy and exergy efficiencies of PVT air collector with monofacial solar cells range from 27% to 94% and from 4% to 18%, respectively. For bifacial PVT, the energy and exergy efficiencies of PVT air collector range from 28% to 67% and from 8.2% to 8.4%, respectively.
Efficiency and energy modelling for PVT air collector with extended heat transfer area: a review Fudholi, Ahmad; Fazleena Musthafa, Mariyam; Taslim, Ivan; Ayu Indrianti, Merita; Noviantari Manyoe, Intan; Yusof Othman, Mohd
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 10, No 4: December 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (337.126 KB) | DOI: 10.11591/ijpeds.v10.i4.pp2029-2036

Abstract

Solar energy is renewable and environment friendly and has been widely used in electricity generation and thermal energy through photovoltaic thermal (PVT) system. This system is beneficial in terms of maximum energy generation and cost of usage. The growing concern on energy sources and their usage has increased the significance and demand for PVT collectors. A PVT air collector consists of a PV panel and a thermal collector system. In PVT air collector, electricity and thermal energy are generated simultaneously. This review focuses on efficiency and energy modelling for PVT air collector with extended heat transfer area. Findings of this review indicated that PVT air collector with extended heat transfer area produced PVT efficiency higher than conventional PVT air collector. The thermal efficiency of PVT air collector for with and without extended heat transfer area are 21-83% and 12-70%, respectively, which the improvement of thermal efficiency is 15.7-42.8%.
Heat transfer and efficiency of dual channel PVT air collector: a review Fudholi, Ahmad; Zohri, Muhammad; Taslim, Ivan; Aliyah, Fitrotun; Gani Koto, Arthur
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 10, No 4: December 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v10.i4.pp2037-2045

Abstract

Solar energy is free, renewable and environment friendly and has been widely used in electricity generation and thermal energy through photovoltaic thermal (PVT) system. A PVT collector is a combination of a PV panel and a thermal collector in a single unit to simultaneously generate electricity and thermal energy. In this review, mathematical models for dual channel PVT air collectors is presented. This review presents various research and development, as well as heat transfer and thermal modelling of dual channel PVT air collectors. Moreover, various mathematical models that evaluate the performances base on energy and exergy analysis of dual channel PVT air collectors are presented. Energy balance is the basic concept in developing the mathematical models. Generally, steady-state one-dimensional linear first-order differential equations were reported for solution of mathematical model. Energy and exergy efficiencies of dual channel PVT air collectors were 22.5%–67% and 3.9%-58%, respectively.
Enhancing Collaborative Teaching Through Developing Website-Based Learning Materials for Lecturers at Makassar Aviation Polytechnic Sukarwoto; Rifai, Moch.; Fudholi, Ahmad; Rusman, Rusman; Prasetyo, Heru; Burhanuddin, Fachrurrazi
Elinvo (Electronics, Informatics, and Vocational Education) Vol. 10 No. 1 (2025): May 2025 (In Press)
Publisher : Department of Electronic and Informatic Engineering Education, Faculty of Engineering, UNY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/elinvo.v10i1.77716

Abstract

This study aims to develop a website-based Learning Material Collaboration System (LMCS) for lecturers at Makassar Aviation Polytechnic. The system is designed to facilitate online collaboration in preparing teaching materials, ultimately enhancing the overall quality of learning using the waterfall method. Currently, teaching materials at the institution are independently prepared by the lecturers responsible for their respective courses, which results in non-standardized materials and limited collaboration between lecturers, practitioners, and cadets. The resulting materials are more comprehensive and sustainable through collaborative efforts in preparing teaching materials. The application requires lecturers to create an account, ensuring only authorized individuals can contribute and compile the teaching materials. This study proposes a collaborative platform that allows teaching materials to be prepared online to improve the effectiveness of learning and the quality of teaching materials. The LMCS application was tested to evaluate its reliability, efficiency, and effectiveness. The test results showed that the application effectively supported the collaboration of teaching materials, although some obstacles remained in managing cadet groups. Based on usability testing conducted with 10 participants, the application was user-friendly, with most testers successfully completing nearly all tasks. Analysis of the questionnaire using a Likert scale revealed positive user feedback, with the ease of use aspect scoring 82.6% and usability achieving a high score of 87.3%. Users felt that the application accelerated and facilitated the collaboration of teaching materials among lecturers and improved operational efficiency. However, for further development, training on the application and improvements to the user interface (UI/UX) are needed to ensure optimal use by all levels of users. The results of this study are expected to contribute to improving the quality of teaching materials and institutional accreditation at Makassar Aviation Polytechnic.
Morphological characteristics and electrical properties analysis of silica based on river and coastal iron sand Meiliyadi, Lalu Ahmad Didik; Wahyudi, Muh.; Damayanti, Isniwana; Fudholi, Ahmad
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 11 No 1 (2022): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v11i1.12390

Abstract

This study aims to analyze silica's morphological characteristics and electrical properties based on the river and coastal sand. Iron samples were taken from Sompang river sand, East Lombok and Coastal Sand from Gading, Mataram City. The silica was synthesized using the sol-gel method with a sintering temperature variation of 100 to 175 ℃. Morphological characteristics samples analysis was done using SEM-EDX. The electrical properties of iron sand included measuring the dielectric constant using the parallel plate method. Furthermore, the resistivity was measured using the two-point probe method. In the silica-based on river sand sample, the resistivity value was inversely proportional to the sintering temperature. In contrast, the resistivity value of silica based on the coastal sand sample was directly proportional to the sintering temperature. Silica-based on river sand has a resistivity of about 7.1'104 Wm at a sintering temperature of 100℃ and 3.5'104 Wm at a sintering temperature of 175℃. Silica-based on river sand has a resistivity of about 1.8'104 Wm at a sintering temperature of 100℃ and 7.1'104 Wm at 175℃. This research is a preliminary study on the electrical properties of natural sand-based silica to improve understanding of the physical properties of silica to be used in technological applications, such as sensors. Furthermore, the dielectric constant value in the river sand sample was directly proportional to the sintering temperature. However, the dielectric constant in the coastal sand sample was inversely proportional to the sintering temperature. Silica-based on river sand has a dielectric constant of about 1.02'102 at a sintering temperature of 100℃ and 1.18'102 at 175℃. Silica-based on coastal sand has a dielectric constant of about 1.97'102 at a sintering temperature of 100℃ and 1.15'102 at 175℃.
Pico hydro propeller turbine prototype experimental study for very low head applications Subekti, Ridwan Arief; Mohd-Zawawi, Fazila; Ismail, Kamarulafizam; Ishak, Iskandar Shah; Sudibyo, Henny; Susatyo, Anjar; Pikra, Ghalya; Radiansah, Yadi; Aziz, Amiral; Fudholi, Ahmad
Journal of Mechatronics, Electrical Power, and Vehicular Technology Vol 16, No 1 (2025)
Publisher : National Research and Innovation Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/j.mev.2025.1111

Abstract

There is a lot of untapped potential for low-head and very low-head (VLH) hydroelectric power in Indonesia. The challenge in developing VLH is that the locations are very difficult to access by vehicle. One example is in the interior of South Kalimantan Province, where it takes more than 12 hours to reach the location on foot. This paper discusses an experimental study of a pico hydro propeller turbine prototype for VLH applications which is suitable for use in remote areas of Indonesia. Its design is simple and lightweight, and it is made from PVC. The turbine's specifications include a power output of 250 W with a net head of 1.53 m. The turbine was designed with four different runner models, including variations in the number of blades and their geometric shapes. The runner models are type 1 and 2 with five and four blades, respectively, and type 3 (in a shallow configuration) and type 4 (in a steep configuration) with 3 blades. The generator used was a DC, 36 V, with a maximum power of 500 W, 2,500 rpm, and 1 phase. An AC lamp was used as the generator load, so an inverter from DC to AC was used in this test. The propeller turbine was tested in the laboratory. The experiments were conducted at various flow rates by adjusting the rotational speed of the supply pump and the electrical load using incandescent lamps. The test results are presented as graphs showing the relationship between flow rate and rotational speed, hydraulic and electrical power, and efficiency. The experimental results indicate that the turbine with a type 3 runner model featuring three blades in a gentle slope configuration has the highest efficiency, approximately 72.5 %.
Co-Authors - Andasuryani Abrar Ridwan Abu Bakarr Momodu Bangura Achmad, Alamsyah Adnan Ibrahim Agus Junaedi Agus Risdiyanto Agus Risdiyanto Ahmad Fazlizan Abdullah Ahmad Rajani Ahmad Rajani Ahmad Rajani Ahmad, Nasarudin Ahmed Mohamed Omer Abdulmula Ahyar Ahmad Amanda Halim Amiral Aziz Andri Joko Purwanto Andri Setiawan Anjar Susatyo Anjar Susatyo Ant. Ardath Kristi Ant. Ardath Kristi Anwar Anwar Anwar Muqorobin Apriwandi . Ari Pani Desvina Ari Pani Desvina Arief Sudarmaji Arief Wisaksono Arifin, Muhammad Subhan Asep Rachmat, Asep Awaludin Martin Azizatun Nikmah, Nur Sani Bahtiar Bahtiar Bahtiar, Bahtiar Bambang Susanto Bambang, Muhammad Refo Bangura, Abu Bakarr Momodu Budi Prawara Budi Prawara Burhanuddin, Fachrurrazi Chan Hoy Yen Cheku Nurul Aisyah Chitraningrum, Nidya Cintopa Satria Adepradana Cipta Endyana Dalila Mat Said Dalmasius Ganjar Subagio Damawidjaya Biksono Damayanti, Isniwana Darussalam, Rudi David Setiawan Desy Kartina Devita Utami Mardiani Dewi Jannati, Eidelwei Dian Andriani Erie Martides Erman Taer Erwin Susanto Faisal Mahfud Fazleena Musthafa, Mariyam Fikri Nur Rohman Fitrotun Aliyah Galih R, Sayid Ghalya Pikra Goh Li Jin Hadi Sirad, Mochammad Apriyadi Hajar Mawaddah Hanny Hafiar Hardani, H Harjono P. Santosa Harningsih Karim Hartono Hartono Hartono Hartono Haryadi Haryadi Hasna Rifdah Khairunnisa Hasnah Natsir Hazim Moria Haznan Abimanyu Haznan Abimanyu Hendri Maja Saputra Herawati Budiastuti Hernimawati Hernimawati Heru Prasetyo Husam Abdulrasool Hasan Indah Raya Intan Noviantari Manyoe Irfandi, Rizal Irfansyah, Ade Ishak, Iskandar Shah Ismail, Kamarulafizam Isniwana Damayanti Ivan Taslim Izza Anshory Jalal Assadeg Jamaaluddin Jayawarsa, A.A. Ketut Julnaidi, Julnaidi Junaedi, Agus Kadek Heri Sanjaya Kamaruzzaman Sopian Kamaruzzaman Sopian Kamaruzzaman Sopian Kamaruzzaman Sopian Kamaruzzaman Sopian Khairiah, Khairiah Kholidil Amin Komarudin, Udin Koswara, Engkos Koto, Arthur Gani Kristi, Ant. Ardath Lady Silk Moonlight Lalu Ahmad Didik Meiliyadi Lalu Darmawan Bakti, Lalu Darmawan Lia Afriyanti Nasution Lim Chin Haw M. Khadafi Somwong Majid Khan Bin Majahar Ali Majid Khan Bin Majahar Ali Majid Khan Majahar Ali Mardiansah, Fajril Mariyam Fazleena Musthafa Mariyam Fazleena Musthafa Mat Said, Dalila Merita Ayu Indrianti Moch. Rifai Mohammad Hossein Yazdi Mohd Awang Kechik Mohd Hafidz Ruslan Mohd Hafidz Ruslan Mohd Hafidz Ruslan Mohd Yusof Othman Mohd-Zawawi, Fazila Mohd. Tahir Ismail Muh. Wahyudi Muhammad Zohri Muhammad Zohri Muhammad Zohri Muhammad Zohri Muhammad Zohri Muhammad Zohri Muhammad Zohri, Muhammad Muhammad Zurhalki Mukhtar Mukhtar Mulianti Muslizainun Mustapha Mustaji Mustaji, Mustaji Mustapha, Muslizainun Nasarudin Ahmad Naseem Akhtar Nilofar Asim Nira Aulia Hanifah Nofialdi, Nofialdi Noorden, Zulkarnain Ahmad Novi Yanti Noviadi A. Rachman Noviadi Arief Rachman Novita Vindri Harini Nugroho, Muhammad Very Nur Farhana Mohd Razali Nur Farhana Mohd Razali Nurato Nurato Nurul Shahirah Binti Rukman Nurul Shahirah Binti Rukman Nurul Shahirah Binti Rukman Nurul Shahirah Rukman Nurul Syakirah Nazri PERDANA PUTERA Pierre Damien Uwitije Pola Risma Prakoso, Aji Putro Prastawa, Andhika Prastowo , Ari Agung Putri Adia Utari Putri, Rahma Lia Putu Yudhistira Budhi Setiawan Radiansah, Yadi Rahmadeni Rahmadeni Rajani, Ahmad Rakhmad Indra Pramana RD Kusumanto Rezavidi, Arya Ridho Hantoro Ridho Hantoro Ridwan Abdurrahman Ridwan Arief Subekti Ridwan Arief Subekti Ridwan Arief Subekti Ridwan Arief Subekti rifa'i, Muhammad Rifai, Moch. Rika Taslim Rudi Darussalam Rusdianasari Rusdianasari Rusdianasari Rusdianasari Rusman Rusman Sa'adah, Nila Saefudin, Deny Bayu Sakuraba, Takahiro Saleem H. Zaidi Santi Santi Santosa Santosa Sapari, Norazliani MD Saprizal Hadisaputra Sastra Kusuma Wijaya Satibi Satibi Setiyo Setiyo Sevia Mahdaliza Idrus Sofyan Sofyan Sohif Mat Sohrab Mirsaeidi Soleh, Asep Muhamad Sopian, Kamaruzzaman Sri Aulia Novita Sri Aulia Novita Stephen Phillips Subagyo Subagyo Subakir Salnus Sudibyo, Henny sudirman palaloi sudrajat sudrajat Suhanto, Suhanto Sukarwoto Surya Dailiati Susatyo, Anjar Syamsul Kurniawan Tinton Dwi Atmaja Tinton Dwi Atmaja Tinton Dwi Atmaja Tresna Dewi Tri Suyono Uce Lestari Uce Lestari Usman Usman Uwitije, Pierre Damien Wahid, Mazlan Abdul Wahyudi, Muh. Wan Nurlaila Mat Desa Wan Nurlaila Yusra Mat Desa Wirawan Piseno Yasin, Mohd Fairus Mohd Yendra, Rado Yurni Oktarina Yusof Othman, Mohd Yuyun Suprapto Zahira Yaakob Zainal Ahnur Zauhari, Azi Zeki Ahmed Darwish Zulfatri Aini