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All Journal JURNAL PENDIDIKAN TAMBUSAI International Journal of Innovation in Mechanical Engineering and Advanced Materials Greenation International Journal of Engineering Science
Prumanto, Denny
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Aerospace Engineering Automotive Engineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Journal : Greenation International Journal of Engineering Science

 1 
Utilization of Heat Compressor in The Air Conditioning of The Ahu Direct Expantion System for Class 100,000 Cleanroom Rooms Laksono, Agung; Prumanto, Denny; Simbolon, Amri; Komarudin, Komarudin
Greenation International Journal of Engineering Science Vol. 3 No. 4 (2025): (GIJES) Greenation International Journal of Engineering Science (December 2025
Publisher : Greenation Research & Yayasan Global Resarch National

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/gijes.v3i4.692

Abstract

Currently, the demand for cleanrooms is quite high. With the growth of the food industry, medical equipment, and hospitals, the need for these spaces has become increasingly important. Cleanroom classifications are regulated in various literature, such as ISO, SNI, NFPA, and others. In ISO 14644-1, cleanroom classification is divided into several categories: Class 100,000 (ISO 8), Class 10,000 (ISO 7), Class 1,000 (ISO 6), and Class 100 (ISO 5). The differences between these classifications lie in temperature, humidity, air changes per hour, particle quality, and airflow distribution.To maintain humidity, electric heaters are generally used as equipment. The energy requirement is quite high, and in an AHU system, this device creates an additional heat load because it generates the full sensible load. In this study, the use of a heat compressor or heat recovery unit could be an option for maintaining humidity in a room conditioned by an HVAC system. The flow rate of the high-temperature, high-pressure refrigerant will be regulated using a solenoid valve triggered by a humidity sensor. A defrost mechanism will be implemented within the heat recovery coil to prevent freezing within the system. The results of this study state that the energy required for a cleanroom AHU system that uses heat recovery for air humidity conditioning is more efficient than using an electric heater.
Validation of Plastic Waste Pyrolysis Prototype Design Based on Used Oil Burner with A Simple Condensation System Using Software Laiya, Moh Risman Nabuah; Prumanto, Denny; Komarudin, Komarudin
Greenation International Journal of Engineering Science Vol. 3 No. 4 (2025): (GIJES) Greenation International Journal of Engineering Science (December 2025
Publisher : Greenation Research & Yayasan Global Resarch National

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/gijes.v3i4.729

Abstract

Plastic waste is a serious environmental problem because it is difficult to decompose and its volume continues to increase. One potential solution is pyrolysis technology, a thermal decomposition process at high temperatures in the absence of oxygen that produces oil, gas, and solid residue. This study aims to validate the performance of simulation software in designing a prototype pyrolysis machine using a used oil burner with a simple condensation system through design, simulation, and experimental testing. A three-dimensional model was created using SolidWorks, while temperature distribution analysis was performed using ANSYS. The prototype was designed to process approximately 2 kg of PP and PET plastic at 300–500°C. Parameters analyzed included reactor temperature distribution, condenser temperature drop, and heating and cooling system performance. Both simulation and experimental results demonstrated good performance. The used oil burner produced stable heat, and the condensation system effectively converted steam to oil, demonstrating the prototype's potential for development into an efficient and economical small-scale pyrolysis machine.
Design of Practical Tools for Achievement of ¾ PK Split AC Cooling System Laboratory Scale Dian Nusantara University Diamond, Anggananda; Komarudin; Prumanto, Denny; Isman, Taufik Nur; Luthfi, Ilham Syawwal
Greenation International Journal of Engineering Science Vol. 4 No. 1 (2026): (GIJES) Greenation International Journal of Engineering Science (March - May 20
Publisher : Greenation Research & Yayasan Global Resarch National

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/gijes.v4i1.817

Abstract

This design aims to design and build a laboratory-scale refrigeration test tool that can be used to test the performance of a cooling system under various operational conditions.The design process for this test equipment involves several stages, from requirements analysis and mechanical and electronic design to fabrication and testing. Some of the features implemented in this equipment include precise temperature control, a digital monitoring system, and the ability to test various types of refrigeration systems. The expected outcome of this test equipment is the ability to provide accurate data on refrigeration system performance, which can then be used to improve energy efficiency and cooling system performance in industrial applications.
Analysis of Material Thickness Effect on Die Clearance in Deep Drawing Process of Inner Body Components Komarudin; Siagian, Jacky Mianda; Isman, Taufik Nur; Prumanto, Denny; Pradana, Bintang Ady
Greenation International Journal of Engineering Science Vol. 4 No. 1 (2026): (GIJES) Greenation International Journal of Engineering Science (March - May 20
Publisher : Greenation Research & Yayasan Global Resarch National

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/gijes.v4i1.818

Abstract

This study investigates the effect of material thickness on die clearance in the deep drawing process of automotive inner body components. In sheet metal forming, improper parameter selection frequently leads to defects such as wrinkling, burr formation, and fracture, which reduce product quality and production efficiency. Despite extensive studies on stamping processes, the interaction between material thickness and optimal die clearance remains a critical issue in industrial applications. An experimental approach was conducted using a material thickness of 0.8 mm under controlled process conditions. Key parameters, including cutting force, stripping force, drawing force, springback, and material elongation, were measured and analyzed. The results indicate that the optimal die clearance lies within the range of −0.06 mm to +0.11 mm. At this condition, the cutting force reached 39,424 Kgf, while stripping and drawing forces were recorded at 1,971.2 Kgf and 5,708.8 Kgf/mm², respectively. The springback value was measured at 1.8 N/mm², and material elongation reached 3.67 mm. The findings demonstrate that die clearance must be carefully adjusted according to material thickness to ensure stable material flow and minimize defect formation. The novelty of this study lies in the experimental determination of a practical clearance range under actual production conditions. This research provides valuable insights for optimizing die design and improving manufacturing performance.
Characteristics of Series and Parallel Centrifugal Pumps Saputro, Andrian; Prumanto, Denny; Ramadhan, Muhammad Sheva
Greenation International Journal of Engineering Science Vol. 4 No. 1 (2026): (GIJES) Greenation International Journal of Engineering Science (March - May 20
Publisher : Greenation Research & Yayasan Global Resarch National

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/gijes.v4i1.862

Abstract

A pump is a device used to lift fluids from a lower surface to a higher surface and to move fluids from low pressure to higher pressure. One such device is a centrifugal pump, a dynamic pressure pump widely used to move fluids with high head. The fluids that can be moved are incompressible fluids. In specific applications, pumps can be used to move substances like this centrifugal pump, this is done so that we can use the tool.
Co-Authors Chairat, Arief Suardi Nur Diamond, Anggananda Isman, Taufik Nur Komarudin Komarudin Komarudin Kusuma, Hernandito Rahmat Laiya, Moh Risman Nabuah Laksono, Agung Luthfi, Ilham Syawwal Nurato Pradana, Bintang Ady Priyanto, Arief Ramadhan, Muhammad Sheva Saputro, Andrian Siagian, Jacky Mianda Simbolon, Amri Suhita, Delphima Wiga Ariani Wiwit Suprihatiningsih