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Inert Gas Axial Flow Analysis on Thermal System with Natural Convection Condition Rio Anshari; Mairizwan Mairizwan; Fandi Oktasendra; Debi Rianto; Zulhendra Zulhendra
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 24 No. 01 (2023): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol24-iss01/338


The Fukushima nuclear accident in 2011 became the basis for consideration of the use of gas as a coolant in nuclear reactors. This is because the convection rate of gas flow in the cooling channel can occur naturally due to differences in density and does not require the help of a pumps for the circulation of the coolant. This study aims to analyze how the flow pattern of an inert gas on a vertical-axial reference by natural convection in a thermal system. The focus of this research is to study the flow parameters of the coolant with a gas phase. This research is an experimental study. The analysis was carried out using a descriptive approach and computer simulation-assisted numerical analysis methods. The results showed that the distribution and variation of heat was radially dominant in the middle so that the coolant channel wall received less heat load. The magnitude of the pressure drop along the vertical-axial channel shows a homogeneous pattern and decreases radially from center to edge. These results indicate the use of inert gas as a coolant can be considered as an alternative coolant in heat systems that do not depend on pumps in operating conditions.
Analisis Kebutuhan Pengembangan Bahan Ajar Digital Fisika Berbasis Project Based Learning Terintegrasi Pendekatan STEM Selma Riyasni; Intan Purnama Yani; Widia Kemala Sari; Zulhendra Zulhendra
Journal on Education Vol 6 No 1 (2023): Journal On Education: Volume 6 Nomor 1 Tahun 2023
Publisher : Departement of Mathematics Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joe.v6i1.3775


21st century learning is suggested to be based on information and communication technology, for example using digital teaching materials. The learning model used is an innovative learning model that improves students' 21st century skills such as project based learning which is also suggested in the independent curriculum. The use of project based learning learning models is considered effective if it integrates the STEM approach. The initial step in developing STEM-integrated PjBL-based digital teaching materials is to conduct an analysis of the needs of teachers and students. The purpose of this study is to describe the results of the analysis of the needs for the development of digital teaching materials based on the integrated PjBL learning model with the STEM approach. The subjects of this study were 22 physics teachers and 50 students of SMAN 2 Bukittinggi. Data collection through questionnaires, then analyzed to obtain conclusions. The conclusions from this study show 1) learning still does not use digital teaching materials, 2) it is necessary to develop teaching materials based on the PjBL learning model that is integrated with STEM to assist student project assignments.