Article Per Year (5 Year)
p-Index From 2021 - 2026
1.99
P-Index
This Author published in this journals
All Journal Rekayasa Mesin FLYWHEEL : Jurnal Teknik Mesin Untirta JURNAL PENGABDIAN KEPADA MASYARAKAT JURNAL SIMETRIK JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN Prosiding Seminar Nasional Sains dan Teknologi Terapan Journal of Renewable Energy and Mechanics Infotekmesin Jurnal Engine: Energi, Manufaktur, dan Material Prosiding SNAST
Lohdy Diana
Politeknik Elektronika Negeri Surabaya
Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation

Published : 14 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 14 Documents
Search

 1   2 
EXPERIMENTAL STUDY OF THE EFFECT OF PLATE CURVES ON SOLAR STOVE Lohdy Diana; Arrad Ghani Safitra; Agung Dwi Cahyo
Jurnal Dinamika Vokasional Teknik Mesin Vol. 8 No. 1 (2023)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v8i1.53487

Abstract

In the midst of various other energy needs, cooking has received special attention in energy consumption due to the scarcity of fuel for cooking which is currently commonly used by the community. The scarcity is directly proportional to the increase in fuel prices. Currently, many alternative energies are being developed, one of which is cooking using solar power. In this study, an experimental study of the effect of the number of plate bends on the solar cooker carried out. This study aims to determine the effect of the number of curvatures of the plate on the performance of a solar cooker. The number of curved aluminum plates in the solar cooker was expected to be able to expand the area of absorption of solar heat, thereby increasing the temperature of the air inside the solar cooker. The solar cooker also adds an absorbent plate in the shape of a flower-like arc. Variations in the number of arches to be studied are 6, 8, and 12 arches. The method used in this study is an experiment in actual conditions. Research result show solar stoves with 12 curved walls have a higher temperature increase and heat absorption compared to 6 and 8 arches. This is because 12 arches have a wider solar heat absorption area.
EXPERIMENTAL STUDY OF REFRIGERANT REPLACEMENT FROM R-22 TO R-290 HYDROCARBON IN DOMESTIC AC Arrad Ghani Safitra; Prima Dewi Permatasari; Teguh Hady Ariwibowo; Lohdy Diana; Nabila Haninda Az Zahra; Lovyta Putri Adianti
Jurnal Dinamika Vokasional Teknik Mesin Vol. 8 No. 1 (2023)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v8i1.65204

Abstract

Most of the refrigerant used in split-type AC machines is HCFC type R-22, which can potentially damage the ozone layer and global warming. Musicool-22 is a trade name for the hydrocarbon refrigerant R-290, an alternative refrigerant that can replace R-22. Tests were carried out on the test equipment by comparing R-22 and Musicool-22 with the same variation of thermal load. Based on the test, the performance of the two working fluids can be determined by determining the coefficient of performance (COP) and comparing it with various cooling loads. In addition, it is proven that using Musicool-22 can save electrical energy and the power value of the compressor. The data measured are temperature, pressure, voltage, and electric current. Based on the results of calculations carried out by changing R-22 to Musicool-22, it shows that the COP value increases. The highest COP of R-22 is 2.45 at an 80-Watt load, and Musicool-22 is 4.21 at a 320-Watt load. The application of Musicool-22 can save electrical energy by 15.40%. Moreover, it saved electricity usage costs of IDR 44,450.53 per month.
Studi Eksperimen Pengaruh Bentuk Saluran Pada Corrugated Collector Terhadap Performa Pengering Tomat Tenaga Surya Arrad Ghani Safitra; Lohdy Diana; Farida Gamar; Novita Astin; Diki Candra Kusuma; Rio Bagus Sasongko
Infotekmesin Vol 17 No 1 (2026): Infotekmesin: Januari 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v17i1.3094

Abstract

Solar Air Heaters (SAHs) are a strategic solution to mitigate post-harvest losses of horticultural commodities caused by inefficient conventional drying. This study aims to analyze the effect of serpentine absorber channel geometries integrated with Fresnel lenses on collector thermal performance and drying effectiveness. The experimental method involved testing three absorber channel cross-sections—triangular, rectangular, and trapezoidal—under outdoor conditions. The results indicate that the trapezoidal design offers superior thermal performance compared to other variations. The trapezoidal collector produced a maximum outlet air temperature of 88.5°C, a useful heat gain of 1,744.49 Watts, and a thermal efficiency of 50%. Application to tomato drying demonstrated that the system reduced drying time by half compared to open sun drying and significantly lowered product moisture content. This study concludes that integrating a trapezoidal absorber with a Fresnel lens effectively enhances the performance of active solar drying systems.
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 Achmad Bahrul Ulum Achmad Setiyawan Agung Dwi Cahyo Ahmad Taufiqurrahman Azhar Arrad Ghani Safitra Arrad Ghani Safitra Diki Candra Kusuma Erik Tridianto Fara Nabilah Sakina Farida Gamar Faris Hilmi Kurniawan Febrian Kusumawardani Fifi Hesty Sholihah Firdaus Fhudoli Putra Habibatu Nihayah Joke Pratilastiarso Lovyta Putri Adianti Muhammad Farid Irfianto Muhammad Nabiel Ariansyah Nabila Haninda Az Zahra Nabila Haninda Azzahra Naili Husna Dewi Naja Imama Mufidah Novita Astin Nu Rhahida Arini Prima Dewi Permatasari Rif’atus Sholihah Rijalulakbar Dewantoro Rio Bagus Sasongko Teguh Hady Ariwibowo Wahyu Nur Fadilah