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All Journal Jurnal Pendidikan Teknologi dan Kejuruan Teknomekanik
Budi Syahri
Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri Padang, Padang, INDONESIA
Education Engineering Mechanical Engineering

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Comparison of variation in the building shapes and the window-to-wall ratio by concerning energy consumption for thermal comfort and lighting Andre Kurniawan; Remon Lapisa; Muhammad Yasep Setiawan; Bulkia Rahim; Budi Syahri
Teknomekanik Vol. 6 No. 2 (2023): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v6i2.27972

Abstract

Currently, an influential factor contributing to thermal comfort home design is the incorporation of energy-efficient passive design principles. It is exemplified by strategic window placement, the utilization of thermally efficient materials, and effective insulation. It exerts a substantial influence on thermal comfort and electrical consumption. This paper examines the effect of building shape and window-to-wall ratio (WWR) on thermal comfort and lighting energy consumption in residential houses in tropical climates. The lighting electricity and the adaptive thermal discomfort hours of 30 different models of houses were obtained using OpenStudio and EnergyPlus simulation software. The models were developed for three building shapes (square, rectangle, and L-shaped), and each model was varied in five models of window-to-wall ratios. Results indicate that the square-shaped model with a WWR of 10% will provide the lowest energy consumption in thermal comfort had 420.45 kWh/m2. On the other side, the lowest energy consumption in lighting is the square-shaped model with a WWR of 50% had 507.95 kWh/m2. Thus, the recommendation is to use the square-shaped house that represents the most efficient air conditioning system while the other WWR set also produce the most natural luminaire. It is because the percentage of WWR increased will result in more energy consumption in air cooling but slightly lower energy consumption in lighting. However, when considering aesthetics and freshness, the WWR of the 50% model will offer a better deal.
Perceived effectiveness of component-linked QR code learning media for learning lathe machine components in vocational high schools Ferdhio Surya Muzakki; Eko Indrawan; Budi Syahri
Jurnal Pendidikan Teknologi Kejuruan Vol 9 No 3 (2026): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jptk.v9i3.52023

Abstract

Vocational machining education requires learning resources that can connect theoretical explanations with direct interaction with industrial equipment. However, students in lathe-machining courses often struggle to identify machine components, understand their functions, and relate components to appropriate operating procedures and safety practices. This study aims to develop and evaluate a component-linked Quick Response (QR) Code learning media system that provides contextual digital information directly through physical lathe components. This study employed a Research and Development (R&D) approach based on the ADDIE framework. The study was conducted at SMK Negeri 5 Padang, Indonesia, involving 74 Grade XI Machining Engineering students. Data were collected through content and media-design expert appraisal, student-response questionnaires, and teacher interviews. The results showed that the developed QR Code learning media achieved very good feasibility ratings from experts, with mean scores of 3.57 for content quality and 3.67 for media-design quality. Student responses produced an overall mean score of 66.78, classified as good, with 89.18% of students providing positive evaluations. Teacher perspectives indicated that the media supported independent access to information, increased student engagement, and facilitated understanding of lathe-component functions and operations during practical activities. The study contributes a physical–digital learning model that integrates QR Code technology with authentic vocational equipment and provides preliminary evidence for further experimental investigations of learning effectiveness.
Co-Authors Andre Kurniawan Bulkia Rahim Eko Indrawan Ferdhio Surya Muzakki Muhammad Yasep Setiawan Remon Lapisa