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Sistem Pengukuran Defleksi Crankshaft Dengan Visualisasi Pola Defleksi Eko Supriyanto; Susilo Adi Widyanto; Sahrijal Purba; Ariyana Dwiputra Nugraha; Meiri Triani; Rasgianti Rasgianti; Ruly Sitanggang; Nur Cahyo
ROTASI Vol 24, No 2 (2022): VOLUME 24, NOMOR 2, APRIL 2022
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.24.2.27-36

Abstract

The crankshaft is one of the main components of a combustion engine. Due to the engine's operating conditions and operation time, the crankshaft alignment may deviate to a particular value that should not exceed the standard limit. When the deviation value has exceeded the limit, the crankshaft will fail. In this research, the design of the crankshaft deflection measurement system was carried out with the visualization of the deflection pattern. The method is done by measuring five positions of the axial deviation between the web surfaces on each piston using a digital dial indicator. Measurement data at each point is then sent and stored in the control panel device wirelessly. Furthermore, the complete measurement data is taken, processed, and displayed in the developed software application to visually display the crankshaft deflection pattern. The test results show that the accuracy of the measuring instrument is 0.001 mm, where this value has met the prerequisites for testing the crankshaft deflection, which is 0.12 mm.
Simulasi Karakteristik Co-Firing Batubara - Sekam Padi pada PLTU Batubara Pulverized Coal Kapasitas 400 MWe Nur Cahyo; Ruly Bayu Sitanggang; Meiri Triani; Rasgianti Rasgianti; Eko Supriyanto; Paryanto Paryanto
ROTASI Vol 24, No 2 (2022): VOLUME 24, NOMOR 2, APRIL 2022
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.24.2.43-53

Abstract

A study on co-firing using coal and rice husk biomass has been carried out on a pulverized coal power plant with a capacity of 400 MWe by varying the co-firing biomass ratio from 0 to 50%. The mixing of coal fuel and rice husk biomass in the model is carried out before entering the pulverizer/mill. After the model iteration shows convergence, the output simulation is validated by comparing the simulation output value with the design and actual parameter values. The evaluation is carried out by comparing the simulation results of baseline conditions with co-firing conditions on the parameters of performance, power output, equipment condition, energy consumption itself, and the impact on emission products. The addition of 1% of the co-firing ratio using rice husks showed a decrease in the boiler efficiency (HHV) by 3.19%. Net plant heat rate and SFC increased by 5.22% and 2.53%. Gross output power decreased by 2.53%. ESP power consumption and total auxiliary power increased by 220% and 17.25%. Furthermore, co-firing using risk husk also reduces SO2 emission and increases the particulate rate.
Co-Authors Ariyana Dwiputra Nugraha Eko Supriyanto Eko Supriyanto Meiri Triani Nur Cahyo Nur Cahyo Paryanto Ruly Bayu Sitanggang Ruly Sitanggang Sahrijal Purba Susilo Adi Widyanto