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Journal : Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering)

UJI KINERJA DAN KELAYAKAN FINANSIAL PENGERING PATI SAGU TIPE PNEUMATIC CONVEYING RING DRYER Abadi Jading; Paulus Payung; Eduard Fransisco Tethool
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 10, No 2 (2021): Juni
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v10i2.228-238

Abstract

Sago starch drying in remote areas or difficult to reach transportation requires artificial dryers to increase the quantity and quality of the dry sago starch. The purpose of this study was to test performance, and analyze the economic value of biomass powered pneumatic conveying ring dryer (PCRD) for drying sago starch for small scale commercial. This research was conducted in two stages, namely performance testing and financial analysis. Small scale (mini) PCRD has been created for drying sago starch with a capacity of 160 kg of dry sago starch per day. The resulting moisture content varies according to variations in temperature and initial moisture content of sago starch and has met the Indonesia National Standard (SNI) No. 3729 regarding the maximum water content of sago starch (13%), except at temperature variations of 50oC and 75oC with an initial moisture content of 41% that did not meet the SNI, which was greater than 13% (14.27% and 13.23%). The drying efficiency varies between 7.339% to 9.689%. Likewise, the yield of dry sago starch that was produced varied between 65% and 73%. PCRD is very feasible to be developed into a commercial scale sago starch dryer with a Pay back value of 2.66 years to return the initial capital of Rp. 186,879,200. Keywords: drying, financial analysis, PCRD, sago starch
Analysis of Air Distribution in a Double Tube Model Heat Exchanger System using Computational Fluid Dynamic (CFD) Reniana, Reniana; Darma, Darma; Payung, Paulus
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 13 No. 3 (2024): September 2024
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v13i3.763-771

Abstract

The double-tube model heat exchanger has a construction of three tube cylinders arranged into one. This model of heat exchanger has a fairly simple construction, making it easier to manufacture and speeding up the manufacturing process. Computational Fluid Dynamics (CFD) is software that can be used to optimize the design and performance evaluation process as well as to speed up the process and minimize costs in tool development because it can represent phenomena that occur in a system. This research aims to analyze air distribution in a double tube model heat exchanger system using CFD analysis and to validate the analysis results with experiments. Based on the research results, a double tube model heat exchanger has been created with an average performance of output temperature and air velocity reaching 97.8oC and 10.4 m/s at a coconut shell fuel consumption of 0.24 kg/minute. The results of evaluating experimental data with simulations obtained RMSE values between 59.33 – 71.69, and MAPE values between 26.26 – 32.93. Meanwhile, the results of the Paired Sample T-Test show that there is no real difference between experimental data and simulation data with an R-value of 0.875 – 0.964. CFD analysis in this research can be used as a reference in the optimization process and development of heat exchangers, especially double-tube models. Keywords: CFD, Design, Double-Tube. Heat Exchanger, Simulation,