Mahendra Satria Hadiningrat
[Orcid ID: 0000-0002-3709-8051], Department of Physics Education, Faculty of Education, Institut Teknologi dan Sains Nahdlatul Ulama [ITSNU] Pasuruan

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The utilization of microalgae as an agent for converting CO2 to O2 in a photosynthesis reactor to mitigate CO2 emissions Mahendra Satria Hadiningrat; Eggi Aunur Rofiq
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 7, No 1 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v7i1.9210

Abstract

A closed photobioreactor design has been fabricated, aiming to determine the basic concept for microalgae Chlorella Vulgaris development. This study employed a flat-plate type with dimensions of 16x20x25 cm with the effectiveness of 3000 ml culture media and two 20 Watt 220 Volt Tungsten Halogen lamps, which were placed on the right and left sides of the reactor with a light intensity of 1000 lux. This study employed two photobioreactors, type I without CO2 supply and type II with CO2 supply as much as 25%. The initial cell density of Chlorella Vulgaris culture was 14,694 x105 cells/ml; then observations were made every day using a Haemocytometer. O2 concentration data were collected every day 3 times with irradiation time of 1, 6, and 9 hours using the O2 gas sensor (KE-50 type). The determination of the O2 concentration value in the photobioreactor on the 3rd day was 0.69%
Fabrication of eco-friendly electric tricycles with solar panels for handicapped person Mahendra Satria Hadiningrat; Mayang Sari; Ninik Nigusti Ayu Sunardi
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 9, No 2 (2023)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v9i2.21321

Abstract

Solar energy is energy in the form of rays and heat from the sun. This energy can be harnessed using various technologies, such as solar panels. Solar panels consist of solar cells that convert light into electrical energy. The topic of this research is the use of solar panels for battery charging on electric tricycles. The process of developing an electric tricycle with solar power consists of several stages, from the preparation of the tricycle, the development design, and the manufacture of the solar panel frame and holder to the assembly and testing process. The result of this research is an electric tricycle uses a 48 Volt with two units solar panel 100 Wp, 7.2 Ah battery with a charging time of 1 hour 22 minutes, using a 350 Watt Brushless DC motor. The maximum speed of an electric tricycle with solar panels is as expected: a distance range of 45 km and a load of 120 kg (per person).