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All Journal Journal of Environmental Engineering & Waste Management Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mechatronics) Indonesian Journal of Computing, Engineering, and Design
Tetuko Kurniawan
President University
Arts Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Software for Auto-Generating Electrode Block Order Sheet: Study Case in Mold Machining Workshop Tetuko Kurniawan; Yosep Purnama
Journal of Mechanical Engineering and Mechatronics Vol 1, No 02 (2016): Journal of Mechanical Engineering and Mechatronics
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (705.236 KB) | DOI: 10.33021/jmem.v1i02.97

Abstract

In a mold manufacturing process, few to hundreds electrode is required for the EDM process. The electrode production is time consuming and it prone to errors when it comes to creating Electrode Block Order Sheet. New software was developed to create automated process to generated Electrode Block Order Sheet that reduce the time consumption and eliminate human errors during the process. By the application of the software, time consumption to create Electrode Block Order Sheet is reduced by 80% and human error involved in the process is eliminated.Keywords. EDM, mold, software, automation, electrode, manufacture
Performance Optimization of Power Plant Waste Heat Using H2O-LiBr Absorption Refrigerant System Lydia Anggraini; Annisa Nur Wahyuni; Rendi Hernawan; Tetuko Kurniawan
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 4 No. 1 (2022): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (585.782 KB) | DOI: 10.35806/ijoced.v4i1.243

Abstract

This paper examines the use of waste energy in a 3x1 MW Gas Engine Power Plant (GEPP) on Bawean Island, Indonesia. The feasibility method uses water-lithium bromide (H2O-LiBr) technology as absorption refrigeration technology. In addition, bananas are also used for cold storage to overcome waste energy utilization. The cold storage is placed in the 300 m3 area with a 100 kg load capacity for a banana with a temperature of 5oC, 85% humidity, 24 hours of operation, 1292 W cooling load, and 371 TR. This system is used because it utilizes a cheap energy source that dissipates heat from gas and has no ecological hazards, such as ozone layer depletion and global warming. The exhaust gas temperature is 500oC. Moreover, cooling loads for cold storage, which are used with thermodynamic models, and consistent fluid properties, performance, and size of cold storage were also investigated. The results obtained show that higher cold storage output comes from internal factors as compared to external factors. In addition, the absorption refrigerant with Tevaporation is 5oC, capacity 403 TR and Qabsorption is 984 kW, Qgenerator is 1066 kW, Qevaporation is 1411 kW, Qcondenser is 1493 kW, with an absorption coefficient of performance (COP) of 1.32 and power consumption of 158,25 kW. Furthermore, after calculations, analysis, and field experiments, it shows that the internal factor of the cooling load is higher than the external factor sourced from bananas in the cold storage. This phenomenon occurs probably due to the product being refrigerated, following the soar cooling capacity. Thus, the waste energy in PLTGU 3x1 MW has tried to be utilized by the refrigerant absorption system.
WASTEWATER SLUDGE AS AN ALTERNATIVE ENERGY RESOURCE: A REVIEW Tetuko Kurniawan; Rijal Hakiki; Filson Maratur Sidjabat
Journal of Environmental Engineering and Waste Management Vol 3, No 1 (2018)
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (372.355 KB) | DOI: 10.33021/jenv.v3i1.396

Abstract

In recent years, concerns regarding to wastewater sludge disposal have increased globally. Production of sludge has increased recently due to the growth of population. Wastewater sludge classified as a hazardous substance, it is not easy to dispose because of certain treatment is required. Typically, sludge is treated at secured landfill which its limited in availability and expensive. On the other hand, wastewater sludge originated from biological treatment contains organic substance that can be converted into alternative energy resources. A technology is needed that is able to reduce the volume of sludge and convert sludge into energy source. We present an overview of various technologies that can be used for conversion of sludge into energy resources. Those technologies are anaerobic digestion, pelletization, combustion, pyrolysis and gasification. Progress and challenges of each technology is presented in detail. A summary of sludge characteristic originated from different source will be discussed as well. Emissions and residues that determines the environmental impact is also considered. Referring to some previous research, it known that wastewater sludge, as unwanted product, has the potential to become future energy resource. This potential can only be used properly if the method of conversion are effective and efficient.
Co-Authors Annisa Nur Wahyuni Filson Maratur Sidjabat Lydia Anggraini Rendi Hernawan Rijal Hakiki Yosep Purnama