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Journal : Journal of Applied Engineering and Technological Science (JAETS)

The Development of Exhaust Fan Housing With Ceiling Mounting For High Rise Buildings by Using DFMA Agri Suwandi; Muhammad Pillar Rachmawanto; Wina Libyawati; Januar Parlaungan Siregar
Journal of Applied Engineering and Technological Science (JAETS) Vol. 4 No. 2 (2023): Journal of Applied Engineering and Technological Science (JAETS)
Publisher : Yayasan Riset dan Pengembangan Intelektual (YRPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37385/jaets.v4i2.1675

Abstract

Design for manufacturing and assembly (DFMA) is widely applied in many industries to optimize the manufacturing and assembly process at the early stage of design, with the aides of the CAD model. Many researchers apply the DFMA to increase assembly efficiency, by decreasing the number of parts from a product, decreasing the manufacturing cost, and reducing assembly time. Therefore, this research applies DFMA to develop exhaust fan housing with ceiling mounting for high rise building type with the same purpose, and at the same time to justify that the method can overcome the problem of assembly time in a production line. Both designs from before and after the application of DFMA, are being compared by using finite element simulation and experimental. The simulation employs stress analysis, to predict the strength of those designs. While the experimental uses a manufacturing cost survey, real assembly time survey and failure test to show the advantages of DFMA design results. The research result shows that the DFMA method can decrease the manufacturing cost by 0.44%, and the assembly time by up to 2%, and able to withstand the entire mass of the ceiling mounting fan.
The Impact of Modified Atmosphere Storage Treatment on Glucose Levels and Mass Transfer Coefficients: A Study Based on Fruit Skin Thickness Agri Suwandi; Wina Libyawati; Esti Mulatsari
Journal of Applied Engineering and Technological Science (JAETS) Vol. 5 No. 2 (2024): Journal of Applied Engineering and Technological Science (JAETS)
Publisher : Yayasan Riset dan Pengembangan Intelektual (YRPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37385/jaets.v5i2.3481

Abstract

Modified atmosphere storage (MAS) has been proven for decades able to decelerate the respirate rate of fruits. The sluggish respirate rate increases the shelf life of fruits. The after-effects of MAS treatment have been investigated from the installation design until gas composition in the storage, however the investigation about the correlation between the treatment level and the fruits characteristic is still limited on the flavor, color, and weight. Therefore, the research goal is to investigate the MAS treatment result based on skin thickness. A series of experiments with full factorial arrangement and three replications, is set in a storage installation.  Skin thickness is classified in to three levels, which are thin, medium, and thick. Each level is represented respectively by orange, banana, and watermelon. Both fruits with and without MAS treatment are quantified by measuring glucose level, to make a comparation.  The outcome of the research from measurement shows fruits which undergo MAS treatment have lower glucose levels than the ones without the treatment, but the weight remains the same.  The mass transfer coefficient with the thickness became a baseline for sudden exchange in the storage.