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All Journal Jurnal Teknik ITS Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Jurnal technoscientia JURNAL PENGABDIAN KEPADA MASYARAKAT EMITTER International Journal of Engineering Technology JURNAL SIMETRIK JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY INVOTEK: Jurnal Inovasi Vokasional dan Teknologi JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN JRST (Jurnal Riset Sains dan Teknologi) Jurnal Technopreneur (JTech) Prosiding Seminar Nasional Sains dan Teknologi Terapan Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Jurnal Elemen Jurnal Teknik Mesin Infotekmesin Jurnal Engine: Energi, Manufaktur, dan Material JURNAL TEKNOLOGI TECHNOSCIENTIA Prosiding SNAST Eksergi: Jurnal Teknik Energi Journal of Mechanical Engineering, Science, and Innovation Logic : Jurnal Rancang Bangun Dan Teknologi
Arrad Ghani Safitra
Politeknik Elektronika Negeri Surabaya
Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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Thermal Analysis of Solar Air Heater with Ventilator Turbine and Fins Safitra, Arrad Ghani; Diana, Lohdy; Agil, Denny Muhammad; Fareza, Julfan Hafiz; Arini, Nu Rhahida
EMITTER International Journal of Engineering Technology Vol 8 No 2 (2020)
Publisher : Politeknik Elektronika Negeri Surabaya (PENS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24003/emitter.v8i2.584

Abstract

Solar air heater (SAH) is a renewable energy application for the drying process. SAH has a challenge to produce high performance under uncertain weather. The performance of SAH can be enhanced by providing the absorber plate by adding the fins. This study aims to evaluate the thermal performance of SAH with rectangular fins SAH at low air velocity. This study compares the performance of SAH without fins and SAH with rectangular fins. Two variations of a tilt angle of SAH are 0° and 30° which are observed in this study. The SAH uses a ventilator turbine to suck air into the collector box. The air velocity is 0.01 m/s. The method is experimental. The SAH is tested under real condition from 9 a.m. to 4 p.m. The measurement tools consist of a pyranometer, an anemometer, a temperature sensor in the inlet section, 3 sensors in the absorber plate, a sensor in the outlet section, 6 temperature sensors in the drying cabinet. The result showed the thermal efficiency of SAH with rectangular fins is 29.67 % higher than SAH without fins at 0˚ tilt of angle at noon. The thermal efficiency of SAH with rectangular fins is 25.26 % higher than that of without fins at 30˚ tilt of angle at noon.
A NUMERICAL STUDY OF CORRUGATED SIERPINSKI CARPET ON SOLAR DRYER Lohdy Diana Diana; Arrad Ghani Safitra; Eli Novita Sari; Firman Yunan Saputra; Muhammad Yusuf Febrian Putra; Mutia Ayu Agustina; Ar Rayyan Ikhsan Syahputra
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 26 No. 1 (2026): March
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v26i1.71-78

Abstract

Solar dryers have problems with low heat transfer performance and uneven temperature distribution, resulting in low efficiency. The efficiency of solar dryers depends on the design of the absorber plate, namely how much it can absorb solar heat. This study applies a Siepinski carpet with a complex structure and large dimensions, resulting in iterations called fractals. This study aims to improve the efficiency of solar dryers as an alternative to the negative impact of falling tomato prices, to determine the effect of the Siepinski Carpet Corrugated fractal distance on the performance of solar dryers in terms of heat transfer, to compare corrugated absorber plates with 3 siepinski carpet corrugated based on variations in the fractal ratio (RF), namely the ratio of the fractal center distance to the fractal length RF = 1, RF = 0.75, and RF = 0.6, on the performance of solar dryers, as well as to determine the distribution of temperature, pressure, and air flow velocity in the collector using the Computational Fluid Dynamics (CFD) simulation method. This study used simulation methods that was conducted in a laboratory. In conclusion, the fractal ratio strongly influences airflow behavior and temperature distribution, where overly dense or overly open configurations enhance heat transfer, while intermediate obstruction can reduce thermal performance. Among the cases studied, RF = 1 and RF = 0.6 provide more effective and consistent heat transfer compared to RF = 0.75.
PENGARUH TURBULATOR PADA PENUKAR KALOR PIPA GANDA UNTUK APLIKASI SOLAR WATER HEATER Safitra, Arrad Ghani; Diana, Lohdy; Sholihah, Rif’atus
JURNAL SIMETRIK Vol 8 No 2 (2018): Jurnal Simetrik (Sipil, Mesin, Listrik)
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M) Politeknik Negeri Ambon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/js.v8i2.215

Abstract

Penukar kalor pipa ganda adalah peralatan yang digunakan untuk menukarkan kalor antara fluida panas dan fluida dingin menggunakan dua pipa konsentrik. Pada penelitian ini penukar kalor pipa ganda digunakan pada aplikasi pemanas air tenaga surya menggunakan dua fluida yang berbeda. Tujuan dari penelitian ini adalah untuk mengetahui performa terbaik dari penambahan turbulator pada pipa bagian dalam penukar kalor pipa ganda. Turbulator berfungsi untuk meningkatkan turbulensi aliran sehingga akan meningkatkan perpindahan panas. Penelitian dilakukan dengan menggunakan peralatan pemanas air tenaga surya yang sudah ditambah dengan penukar kalor pipa ganda. Pada pipa bagian dalam diberi variasi turbulator bentuk twisted tape full swirl dan twisted tape full swirl wire coil kemudian dialiri fluida oli yang dipanaskan melalui kolektor surya, sedangkan pada pipa bagian luar dialiri fluida air. Pengujian dilakukan di luar ruangan pada kondisi langit cerah dari pukul 10:00 sampai dengan pukul 15:00. Berdasarkan hasil pengujian pada semua variasi pada saat pukul 12:00 dengan intensitas radiasi matahari 789 W/m2, performa terbaik diperoleh pada variasi menggunakan turbulator bentuk twisted tape full swirl wire coil yaitu efektifitas sebesar 0.51, NTU 0.73, dengan peningkatan tempetatur fluida air 3°C.
Electrical Energy Saving Analysis in Educational Buildings Using CLTD and ECI Methods Arrad Ghani Safitra; Lohdy Diana; Lovyta Putri Adianti; Naja Imama Mufidah
Infotekmesin Vol 17 No 2 (2026): Infotekmesin: Juli 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/

Abstract

An energy audit is a systematic assessment conducted to evaluate energy consumption and identify opportunities for improving energy efficiency in buildings. This study evaluates electrical energy consumption in three computer laboratories of the D3 PENS Building using the Energy Consumption Intensity (ECI) and Cooling Load Temperature Difference (CLTD) methods. The analysis was conducted based on measurements of room dimensions, indoor environmental conditions, electrical energy consumption, and cooling loads. The ECI values obtained for laboratories JJ-204, JJ-101, and JJ-310 were 24.44, 18.17, and 19.91 kWh/m²/month, respectively, indicating relatively high energy consumption. The CLTD analysis indicated that the cooling load was affected by external and internal heat gains, particularly those generated by occupants and computer equipment. The combined application of CLTD and ECI provides an assessment of the relationship between cooling load and electrical energy consumption. Energy conservation measures were proposed through operational adjustments, air-conditioning maintenance, and refrigerant replacement. The replacement of R-22 with MC-22 was estimated to reduce electricity consumption by 15.40%, corresponding to potential monthly savings of IDR 476,887.95. The study was limited to three computer laboratories under normal operating conditions and did not involve dynamic building energy simulation.
Co-Authors Elby , Alvin Christian Abdul Aziz Achmad Bahrul Ulum Achmad Setiyawan Agam Sulistyo Aghist Fitrony, Muhammad Agil, Denny Muhammad Agung Dwi Cahyo Ahmad Taufiqurrahman Azhar Aji, Pandu Gautama Amalia, Rif?ah Amalia, Rif?ah Amelia, Firyal Nisa Apriani Rosnauli S Ar Rayyan Ikhsan Syahputra Aribowo, Teguh Hady Aribowo, Teguh Hady Arifin P. P., Moch. Denis Arini, Nu Rhahida Ary Bachtiar Khrisna Putra Ary Bachtiar Khrisna Putra Dewi, Naili Husna Diana, Lohdy Eky Novianarenti Eli Novita Sari Eny Kusumawati Erik Tridianto Erik Tridianto Erlinda Ningsih, Erlinda Fareza, Julfan Hafiz Fauziyyah, Inas Nabilah Fifi Hesty Sholihah Firman Yunan Saputra G. P., Hendrik Elvian Haidar Fakr, Muhammad Hendrik Elvian G. P. Heroe Poernomo Hidayatullah, Muhammad Muslih Ikhsan Baihaqi Imaniah Sriwijayasih Inas Nabilah F Islam, Saiful Ismah, Paradya Nabilah Joke Pratilastiarso Julianto, Mochammad Arief Julianto, Mochammad Arief Kurnia Devi Ariswanda Lohdy Diana Lohdy Diana Diana Lovyta Putri Adianti Moch. Denis Arifin P. P. Mochammad Denis Arifin Pratama Putra Mohammad Basuki Rahmat Muhammad Nabiel Ariansyah Muhammad Yusuf Febrian Putra Mutia Ayu Agustina Nabila Haninda Az Zahra Nabila Haninda Azzahra Naili Husna Dewi Naja Imama Mufidah Nur Hidayat Prasetyo, Muhammad Fandi Setiawan Cahyono Pratilastiarso, Joke Prima Dewi Permatasari Priyambodo Nur Ardi Nugroho Puspitasari, Susi Puspitasari, Susi Putra, Firdaus Fhudoli Qurniawan Zen Al Faris Radina Anggun Nurisma Rif’atus Sholihah Rijalulakbar Dewantoro Rini Indarti Rio Adi Kristian Riyantoni, Ricko Guntur Saputra, Firman Yunan Setyo Nugroho Setyo Nugroho Setyo Nugroho Sholihah, Rif’atus Syahputra, Ar Rayyan Ikhsan Syariful Hadi, Muhammad Teguh Hady Ariwibowo