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All Journal Jurnal Agroteknos Taman Cendekia : Jurnal Pendidikan Ke-SD-an JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN INOVTEK POLBENG Dinasti International Journal of Management Science JTTM: Jurnal Terapan Teknik Mesin Journal of Educational Sciences Tsaqofah: Jurnal Penelitian Guru Indonesia YASIN: Jurnal Pendidikan dan Sosial Budaya ANWARUL: Jurnal Pendidikan dan Dakwah Jurnal Manajemen Sistem Informasi Jurnal Polimesin TANJAK : Jurnal Pengabdian Kepada Masyarakat
Irwan Kurniawan
Indonesian Center for Earthquake Engineering
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The Influence of the Project Citizen Model on Elementary School Students' Critical Thinking Skills Kurniawan, Irwan; Cathrin, Shely
Journal of Educational Sciences Vol. 10 No. 1 (2026): Journal of Educational Sciences
Publisher : FKIP - Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jes.10.1.p.432-443

Abstract

This study aims to analyze the influence of the Project Citizen model on the critical thinking skills of elementary school students. The main problem in learning Civic Education in elementary schools is the low critical thinking skills of students due to the dominance of conventional approaches that focus on one-way learning. This study uses a quantitative approach with a quasi-experimental design, involving two groups: an experimental class that applies the Project Citizen model and a control class that uses conventional learning. The research instrument is a test. The results of the analysis show that the average pre-test score of 50.48 increased to 74.04 in the post-test after the implementation of Project Citizen. The independent t-test showed a significance value of 0.019 <0.05, which means there is a significant influence between the implementation of the Project Citizen model on improving students' critical thinking skills. In addition, the implementation of this model also increases participation and effective communication between students. Thus, Project Citizen is proven to be effective in developing the critical thinking skills of elementary school students, and is relevant to be applied in Pancasila Education learning that emphasizes the formation of democratic and reflective characters.
THERMAL AND ENERGY ANALYSIS OF AN ICE-MAKING MACHINE USING AN OUTDOOR AC REFRIGERATION SYSTEM Teguh Setyawan, Reinaldi; Kurniawan, Irwan; Umira, Siti
Jurnal Dinamika Vokasional Teknik Mesin Vol. 10 No. 2 (2025)
Publisher : Department of Mechanical Engineering Education

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Abstract

This study investigates the thermal and energy performance of a custom designed ice maker that utilizes a modified outdoor air conditioning (AC) unit as its primary refrigeration system. The objective is to evaluate the feasibility, efficiency, and operational stability of using a household AC condenser unit for small scale ice production, particularly in areas with limited access to commercial ice making equipment. The experimental setup was tested over an 8 hour operation period, with parameters such as input water temperature, ice formation temperature, freezing time, power consumption, Coefficient of Performance (COP), and system efficiency being measured and analyzed. The results show that the system was capable of producing 6.5 kg of ice, with a measured actual COP of 3.05 and an efficiency of 67.78%. Although minor deviations were observed from the design specifications, the overall performance remained within acceptable limits. These findings suggest that repurposing outdoor AC units can provide a cost effective and energy efficient alternative for localized ice production.
Implementasi dan Evaluasi Pembelajaran Daring di SDN Perumnas 9 Tangerang Magdalena, Ina; Kurniawan, Irwan; Rahmayani, Lusy Nur
YASIN Vol 2 No 1 (2022): FEBRUARI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (351.303 KB) | DOI: 10.58578/yasin.v2i1.219

Abstract

This study aims to determine the implementation and evaluation of online learning at SDN Perumnas 9 Tangerang. This type of research is a qualitative descriptive research. The research method used in collecting information is by using observation. The results showed that online learning at SDN Perumnas 9 Tangerang mostly used the WA group application as a medium in providing learning materials and the Quizizz application as a learning evaluation medium. There are several shortcomings in this online learning, such as not all students have Android phones, the background and characteristics of children are different, so it is necessary to evaluate learning as a benchmark for the success of learning. Based on the results of research conducted, online learning is not the best learning method because it is still less effective and difficult to do. Teachers cannot directly assess the development of students. The teacher also cannot see whether the students have understood or not the material that has been delivered.
Experimental study of pressure effects on the thermal performance of trap pipes in a horizontal water-tube boiler Kurniawan, Irwan; Burhan Hafid; Jumarizan; Maksum
JTTM : Jurnal Terapan Teknik Mesin Vol 7 No 2 (2026): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v7i2.2281

Abstract

Boiler systems are widely used in industrial processes to convert fuel energy into thermal energy in the form of steam. Improving boiler thermal performance is essential to reduce fuel consumption, operating costs, and energy losses. One approach to enhance energy utilization is the recovery of residual heat from flue gases. In water-tube boilers, additional heat recovery components such as trap pipes can be installed along the flue gas path to capture unused thermal energy before it is discharged through the exhaust system. However, the thermal contribution of trap pipes in small-scale boilers operating at relatively low pressures has not been widely investigated. This study aims to experimentally evaluate the influence of operating pressure on the thermal performance of trap pipes installed in a horizontal water-tube boiler system. The experimental setup consists of a boiler with a water capacity of 588 liters fueled by waste oil. The trap pipe assembly includes 30 tubes with an outer diameter of 27 mm and a length of 398 mm, providing a total effective heat transfer area of 1.013 m². Experiments were conducted at operating pressures of 1, 2, 3, and 4 bar under steady-state conditions. Thermal performance was assessed using energy balance analysis to determine trap pipe efficiency, surface heat flux, and total heat loss. The results indicate that increasing operating pressure enhances the heat recovery capability of the trap pipe system. Trap pipe efficiency increased from 2.54% at 1 bar to 3.95% at 4 bar, while the surface heat flux showed a slight rise from approximately 16.75 kW/m² to 16.90 kW/m². Despite this improvement, total heat loss increased significantly with pressure due to higher fuel consumption and greater temperature gradients. These findings suggest that pressure elevation improves local heat transfer but also intensifies energy dissipation, indicating a thermodynamic trade-off in boiler operation
Co-Authors Azzami, Abdulloh Burhan Hafid Daito, Apollo Ery Muthoriq, Ery Firlyansyah, Hilda Fitriah, Hasanah Gunawan Gunawan Hairullah Hairullah, Hairullah Hakim, Apriman Imran Imran Istiqomah , Lailatul Jayanti, Tarisa Jumarizan Magdalena, Ina MAKSUM Martianis, Erwen Mujoko, Bejo Murdani Murdani, Murdani Pratiwi, Annisa Dwi Rahmayani, Lusy Nur Reinaldi Teguh Setyawan Setiawan Assegaf Shely Cathrin Tajul Arifin Teguh Setyawan, Reinaldi Umira, Siti Yuliyani, Tika Yusuf, Dewi Nurhayati