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MSK. Tony SU.
Dosen Jurusan Teknik Mesin, Fakultas Teknik, Universitas Diponegoro
Mechanical Engineering

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ANALISA EFISIENSI EXERGI BOILER DI PLTU UNIT 3 PT. INDONESIA POWER SEMARANG – JAWA TENGAH Musanta H. Ginting; MSK. Tony SU.; Khoiri Rozi
JURNAL TEKNIK MESIN Vol 1, No 4 (2013): VOLUME 1, NOMOR 4, OKTOBER 2013
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

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Abstract

In this paper, thermodynamic analysis in boiler which placed in Steam Power Plant (PLTU) Unit 3 UBP Semarang and has 200 MW capacities is presented. Thermodynamic analysis used in this paper is exergy analysis. Exergy analysis has function to identify the used of real energy or the quality result of the actual energy consumption and the real lost of energy as result from irreversible process. Exergy can have destruction from irreversible processes and the heat movement to environment. Boiler is the biggest source of exergy destruction in a Steam Power Plant’s system, so there is a big opportunity to increase the efficiency in performance. Therefore the bigger efficiency in boiler’s performance, the lower production cost for fuel consumption in industry. The average score of exergy efficiency and energy efficiency in boiler are each 71, 84% and 72, 40%. Research has resulted that heat exchanger gives the biggest contribution to the exergy destruction’s rate, that is 12, 02 % and combuster also gives contribution to the exergy destruction’s rate in the amount of 8,45 %. Therefore the total of exergy destruction’s rate in boiler is 83,771 MW from the entry exergy which is 409, 3061 MW. Other important point is the air temperature. It has became factor which affects the score of exergy destruction rate and exergy efficiency in combustor, while steam mass flow rate and generator output power are factors which influence the score variation of efficiency of total exergy, efficiency of total energy, the rate of total destruction, efficiency of heat exchanger exergy and the destruction of heat exchanger exergy rate.
ANALISA PENGARUH JARAK CHOKE BEAN TERHADAP LAJU EROSI ALIRAN DUA FASA STEAM-SOLID DI DALAM ELBOW PADA PIPA VERTIKAL INJEKTOR UAP PT. CHEVRON PACIFIC INDONESIA (CPI) MENGGUNAKAN CFD Abrorul Fuady R.; MSK. Tony SU.; Eflita Yohana
JURNAL TEKNIK MESIN Vol 1, No 4 (2013): VOLUME 1, NOMOR 4, OKTOBER 2013
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1031.655 KB)

Abstract

Choke bean is essentially needed on hydrocarbon production system. The main function of this tool is to restrain and regulate flow rate of fluids in the pipe through a hole of the choke bean known as orifice. The use of the choke bean is very risky because of the relatively high velocity fluid that comes out of the choke due to the narrowing of the flow. High velocity may cause huge turbulence which affects the rate of erosion in the elbow. The purpose of this study is to determine the effect of distance variations of the choke bean with the elbow; and velocity of the fluid toward the erosion rate in the elbow using CFD. Distance variations of the choke bean  with elbow  are 12 in (0,3048 m), 24 in (0,6096 m)  and 36 in (0,9144 m) . Variations of the fluid velocity are 15,99 m/s, 22,39 m/s and 28,78 m/s. Simulation results shows that the greater the distance between the choke bean with the elbow causes a decrease in the erosion rate. The increased fluid velocity affects to the increasing the erosion rate.
Co-Authors Abrorul Fuady R. Eflita Yohana Khoiri Rozi Musanta H. Ginting