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Komarudin Komarudin
Institut Sains dan Teknologi Nasional Jakarta
Electrical & Electronics Engineering Engineering

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ANALISA RENCANA INVESTASI PADA PENGEMBANGAN LINTASAN PRODUKSI NEW MODEL CRANK CASE TIPE SPORT DI PT XYZ Komarudin Komarudin; Purwi Timur Iswari; Ryani Dhyan Parashakti
Bina Teknika Vol 16, No 2 (2020): Bina Teknika
Publisher : Faculty of Engineering UPN "Veteran" Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54378/bt.v16i2.2161

Abstract

XYZ Company is currently planning the production machining line for crank case new model sports type of 2200 units / day. There are two alternative investment plan that is manual and automation to get the best alternative in terms of finance .Analysis tool used is the Net Present Value (NPV), Internal Rate of Return (IRR) and Payback Period (PBP) as the basis for determining which alternative is chosen. Sensitivity analysis is used to determine which is the most sensitive variable to the NPV .Both alternatives feasible to be realized, but the automation system was chosen because of the analysis results is greater than the value of the manual system with an IRR of 57.52% (IRR > MARR), which MARR 7.88% and a NPV of USD 299 002 634 271 (NPV > 0), and payback of 1 years for 0,27 month, which is faster than the economic life of the machine that 8 years. Total interest rate is the most sensitive factor in changing the NPV
Pengujian Pengaruh Ketinggian Weir pada Koefisien Discharge dari Weirmeter Sharp-Crested V-Notch 90o Komarudin Komarudin; Djoko Suprijatmono; Gennady Chitra Pati
Bina Teknika Vol 15, No 1 (2019): Bina Teknika
Publisher : Faculty of Engineering UPN "Veteran" Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (777.444 KB) | DOI: 10.54378/bt.v15i1.886

Abstract

Weirmeter is a discharge gauge on an open-channel flow that is usually applied to dams and rivers. In each weirmeter there is a discharge coefficient (Cd), which is the coefficient multiplied by the theoretical discharge to obtain the actual discharge because the pressure difference and flow velocity are neglected. The Cd is directly proportional to the discharge. The actual debit measurement results do not approximate the result (the multiplication of the theoretical debit with Cd). This difference may be due to unequal Cd values for each weir dimension, one of which is the weir height (P). Therefore it is necessary to test the weirmeter with P varies in order to know the pattern and the value of Cd. The tested weirmeter is sharp-crested v-notch 90o with a length of 200 cm and a width of 35.5 cm. P used is 20.3 cm; 21.3 cm; and 22.3 cm. From the test, the Cd value is inversely proportional to P although some of these test results are far from the theory because it requires a 90% confidence interval on the Student distribution (t distribution). The value of Cd in weirmeter used is 0.6996 for P 20.3 cm; 0.6657 for P 21.3 cm; and 0.5781 for P 22.3 cm.
STUDI PERFORMANSI ECONOMIZER JENIS ALIRAN SILANG UNTUK PROSES DEGREASING DI PT. X PLANT KARAWANG Komarudin Komarudin; Reza Rahmaputra
Bina Teknika Vol 14, No 2 (2018): Bina Teknika
Publisher : Faculty of Engineering UPN "Veteran" Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1167.237 KB) | DOI: 10.54378/bt.v14i2.334

Abstract

Economizer is Heat Exchanger with Crossflow type that have function as reheater the  water to degreasing process. System of Economizer had operated continuously for 7 years. So from this condition Effectiveness and Temperature possibility Can’t achieve the Requirement. Degreasing Process is a part of Painting process in Vehicle manufacturing that have function to degrease the oil, dust and etc.  A decrease in the effectiveness of this, we need recalculation and compare  with design condition to get better effectiveness. Analysis will be refer to fluid flow, overall heat transfer coefficient (U), and Efffectiveness of Economizer it self. Based on result of Calculation and Experiment, the flow of fluid is turbulent flow with Reynold number 12002.14 (Max Condition). Overall heat transfer coefficient (U) is 16.18 W/mK, while the design condition is 48 W/m.K also for Effectiveness is 32.16% and the design condition is 50%. This calculation Proved decreasing of that the performance of economizer. It is caused by scaling of the inner pipe with ratio 2.26%. Scaling will be reduce thermal conductivity of the pipe and also gradient of Temperature.
Co-Authors Djoko Suprijatmono Gennady Chitra Pati Purwi Timur Iswari Reza Rahmaputra Ryani Dhyan Parashakti