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PENGARUH PEMELIHARAAN OVERHAUL TURBOCHARGER TERHADAP KINERJA MESIN UNIT VII PLTD AMPENAN Redaksi Tim Jurnal
JURNAL POWERPLANT Vol 5 No 1 (2017): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (791.882 KB) | DOI: 10.33322/powerplant.v5i1.110

Abstract

Increasing number of Indonesian population and unequal distribution of population with higher densities only on certain islands rather than outside the islands, appropriate development strategies are needed in providing need for electrical resilience for the population. Frequent interactions with fuel - powered engines such as diesel engines and human resource readiness probably are reasons for government choice in using diesel powered engines (very big and medium sized diesel engines) to provide electricity on small islands and remote islands. Availability of electrical energy will create a conducive investment climate and improve welfare of the population. Lombok West Nusa Tenggara is one of small islands in Indonesia. In the area, electricity need is generated by PLTD Ampenan. One of the Ampenan diesel engines in unit VII is New Sulzer 12 ZAV 40 S equipped with double turbocharger type VTR 354. To maintain its performance, overhauls done routinely. Overhaul is a procedure performed to restore engine performance to factory standard specification value and give second age with condition worn or defective components refer to reusable parts instructions according to factory standards. This research focuses on the state of the diesel engine as a prime mover of generator before and after its turbocharger overhaul. And also, things about turbocharger overhaul and its effect on the engine.
PENGEMBANGAN MODEL PEMBELAJARAN BERBASIS TUTORIAL BAGI MAHASISWA TEKNIK MESIN STT PLN Redaksi Tim Jurnal
JURNAL POWERPLANT Vol 5 No 1 (2017): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (563.785 KB) | DOI: 10.33322/powerplant.v5i1.111

Abstract

Tutorial method is a way of delivering learning materials that have been developed in the form of modules for students to learn independently. Students can consult about the problems and progress encountered periodically. Many limitations teacher, in choosing the right method of teaching cause lecturer difficult to realize the demands of the students in this teach. Acceleration we can see at universities around us, still very much a lecturer who uses teaching methods in a conventional way, such as lectures, notes, summarizes and etc. Research aims to determine the effectiveness of the use of the tutorial method of teaching in the department of mechanical engineering. This study uses research and development (Research and Development), the stage of preliminary studies carried out by applying a qualitative descriptive approach. The development phase is done by trial limited to the conventional model of teaching faculty by applying experimental methods (Single One Shot Case Study) After no improvement on the limited test then continued with a broader test of the experimental method in the form of groups (one group pretest-posttest). The latter is a tutorial teaching model validation methods eksprimen. The result of research shows that tutorial teaching methods more effective than the old teaching methods, both on the speed aspect of students' understanding of the lecture material, creativity, and student results.
PENGUKURAN SUHU PEMBAKARAN DI DALAM BOILER: PIROMETER AKUISTIK VS PIROMETER INFARED Redaksi Tim Jurnal
JURNAL POWERPLANT Vol 5 No 1 (2017): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (818.702 KB) | DOI: 10.33322/powerplant.v5i1.112

Abstract

Pirometer akuistik adalah salah satu jenis alat ukur suhu yang non-intrusive dan andal untuk digunakan didaerah yang memiliki temperatur yang tinggi, korosif dan kotor dibandingkan denganalat ukur jenis contact measurement. Dalam tulisan ini akan dibandingkan hasil pengukuran temperatur di daerah furnace exit gas temperatur (FEGT) dengan menggunakan pirometer akuistik(PA) dan pirometer infrared (IR) di boiler unit # 4 PLTU Suralaya. Hasil komparasi menunjukkan bahwa perbedaan pengukuran temperatur dengan menggunakan PA adalah 56°C atau 5%,
PERANCANGAN BOILER DENGAN MEMANFAATKAN SAMPAH KERING UNTUK BAHAN BAKAR PLTU MINI 3 kW STT-PLN Redaksi Tim Jurnal
JURNAL POWERPLANT Vol 5 No 1 (2017): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1496.895 KB) | DOI: 10.33322/powerplant.v5i1.113

Abstract

Boiler is a heat exchanger that serves to evaporate boiler feed water to produce dry steam to drive the turbines in order to produce electricity. The fuels used in this study are dry wastes such as paper, plastic, and wood. The process of designing this boiler is carried out so that the use of diesel to generate steam on energy conversion practicum/experiment in STT-PLN is no longer needed. Instead, they can use dry waste as fuel to produce steam which later will drive the turbines. The residue of burning waste process in the form of ashes is approximately 0.053% of the weight or volume of dry waste before burnt. The calculation conducted on this works is to determine the design of evaporator and economizer pipe. The calculation is also adjusted to the generated steam needed in order to spin the turbines. The pressure produced from this boiler design should be 2.9 bar and for the amount of steam was 21 kg / hour. As a result, the calculation of evaporator surface area is 8,83 m2, result simulation HTRI 8.95m2 with 88 pipes and 1500 mm for each pipe, while the heated surface area for economizer is 0,46 m2 result simulation HTRI 0,45 m2 with 18 pipes and 400 mm long for each pipe.
UJI PRESTASI DAN EMISI DIESEL BERBAHAN BAKAR MINYAK NABATI MURNI UNTUK PEMBANGKITAN DAYA DI DAERAH TERPENCIL Redaksi Tim Jurnal
JURNAL POWERPLANT Vol 5 No 1 (2017): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (467.159 KB) | DOI: 10.33322/powerplant.v5i1.115

Abstract

Pure Plant Oil (PPO) such as Pure Coconut Oil (PCO) and Pure Palm Oil (PPaO) could be a solution for electricity problem in remote areas in Indonesia. PCO and PPaO can be used as a fuel for diesel engine to produce electricity. This paper will compare and analyze the performance and emissions of the diesel power plant fueled with diesel fuel, PCO, and PPaO. For performance parameter, brake specific fuel consumption and thermal efficiency of diesel engine by using PPaO and PCO are higher than the diesel fuel, but the brake specific energy consumption are lower than the diesel fuel. That means diesel engine will be more efficient and have lower operational cost by using PPaO and PCO. For the emission parameters, CO2, CO, and CH emissions from PPaO and PCO are higher compared to diesel fuel. That means PPO have higher carbon emission than just using conventional diesel fuel. But, there are highly significant difference of less NOX emissions by using PCO and PPaO compared to the diesel fuel. That means it will be better using PPO because diesel engine has lack of high NOX emissions. These differences of diesel engine performance and emissions by PPaO, PCO, and diesel fuel are caused by the fuel characteristic differences such as cetane number, calorific value, and viscosity.
ANALISA EFISIENSI BOILER DENGAN METODE HEAT LOSS SEBELUM DAN SESUDAH OVERHAUL PT. INDONESIA POWER UBP PLTU LONTAR UNIT 3 Redaksi Tim Jurnal
JURNAL POWERPLANT Vol 4 No 4 (2017): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (23.464 KB)

Abstract

One of the main components of the power plant is boiler. Boiler efficiency is very influential on the plant thermal efficiency. To maintain the efficiency of the boiler according to the design need to do maintenance activities, including overhaul. Sankey diagram to do with lack of analysis of the efficiency of the boiler. In this paper to analyze the efficiency of boiler power plant Banten 3 Lontar method of heat loss and Sankey diagram. The results of analysis of boiler efficiency before overhaul 82.78 and after overhaul 83.80%. Compared with the standard design of a drop in efficiency of the boiler before overhaul 10.:38% and 10.18% after overhaul activities. There are three elements to the largest percentage of heat loss which affects the efficiency of boilers that heat loss due to dry flue gas (6.01% -6.11%), heat loss moister fuels (4.9% -5.1%), and loss of heat due to the combustion of hydrogen (3.9% -5.0%). Also from the analysis obtained there are three elements that influence fuel to the formation of heat loss which affects the efficiency of the boiler, this is carbon (46% -52%), humadity moister (27% -33%) and oxygen (11% -13%). Maintenance and overhaul activities significantly affect the boiler efficiency.
ANALISIS KEKUATAN PIPA GLASS-FIBER REINFORCED EPOXY TERHADAP BEBAN IMPAK, BEBAN TEKUK, DAN BEBAN TEKAN DI JOB PERTAMINA-PETROCHINA EAST JAVA Redaksi Tim Jurnal
JURNAL POWERPLANT Vol 4 No 4 (2017): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (23.464 KB)

Abstract

This study aims to determine the strength of the pipe Glass-fiber Reinforced Epoxy due to impact load, bending load, compression load and be able to analyze the failure potential of the shear stress on the pipe inner wall due to the fluid flow in it. Some test has been done, there are impact test with notched Charpy method (ISO 179-10), 3-point bending test (ASTM D 790-15), and the compression test (ASTM D 695-15). Volume fraction of Glass-fiber Reinforced Epoxy pipe for the Glass-fiber (E-glass) is ± 72.85% and for the Epoxy (Bisphenol A) is ± 27.15%. The orientation angle is 54.75 (continued) and the pipe was made by the helical filament winding method. The test results showed the impact strength is 190.10 ± 20.95 kJ / m2, the bending strength is 115.16 ± 5.50 N / mm2, and the compression strength is 259.48 ± 11.85 N / mm2. It is much larger than the calculation of shear stress on the wall of the pipe that assumed. In other word the pipe is safe from failure potential of the shear stress on the pipe inner wall due to the fluid flow in it.
ANALISIS PERFORMA KONDENSOR DI PT. INDONESIA POWER UJP PLTU LONTAR BANTEN UNIT 2 Redaksi Tim Jurnal
JURNAL POWERPLANT Vol 4 No 4 (2017): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (23.464 KB)

Abstract

Steam Power Plant Lontar Bantam is built on an area of 94 hectares with a capacity of three generating units where each unit is 315 MW, bringing the total power capacity of 945 MW of electricity generated. The electric power generated Lontar Steam Power will be channeled through the 150 kV transmission lines along the 22 kilometers to the substation Teluk Naga and along the 22 kilometers to the new substation Tangerang. Working from the condenser has an influence on the performance rankine cycle. Condenser otherwise good performance when the heat transfer process that occurs in the condenser is progressing well. Heat transfer process is influenced by several things such as cleanliness tube, the amount of refrigerant flowing water, cooling water inlet temperature. The performance of the condenser is calculated at the time before overhaul and after overhaul. Condition after overhaul should be better than before the overhaul, if there is a decrease in performance then you can add what steps can be done to overcome it. In this study to calculate the performance of the condenser using a standard ASME PTC 12.2 – 2010 (Revision Of PTC 12.2–1998 (R2007) Steam Surface Condensers and in research condenser performance results after the overhaul is better than the performance of the condenser before overhaul.
PENGARUH BEBAN PENDINGIN TERHADAP KINERJA MESIN PENDINGIN DENGAN REFRIGERANT R134a DAN MC134 Redaksi Tim Jurnal
JURNAL POWERPLANT Vol 4 No 4 (2017): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (23.464 KB)

Abstract

Direct replacement method refrigerant in the engine manifold coolant HFC R134a with hydrocarbon widely developed. Retrofit refrigerant in cooling machine is not known with certainty the optimal pressure on the compressor, resulting in evaporation temperature and shows the performance of air conditioner. This study aims to determine the effect on the performance of the cooling load of air conditioner using refrigerant R134a and MC 134 on the filling pressure of the refrigerant which is optimal. The parameters were observed in this study was the effect of optimal pressure on kompessor, temperature condenser, evaporator temperature, the cooling load on the performance of refrigeration. Experimental research is still done on a laboratory scale. The result showed that if the cooling load increases will take effect on increasing the amount of heat absorbed by the evaporator, the evaporator heat discharged, reduced compressor work, the mass of refrigerant in the system and COP decreased. The use of hydrocarbon refrigerant MC 134 positive impact of heat absorbed the increase in the evaporator, the heat rise in dumped konsendor, COP system, the mass of refrigerant circulating in the system is reduced and the compressor work will decrease. Retrofit refrigerant hydrocarbon refrigerant R134a with MC 134 is worth considering for a vapor compression refrigeration system.
PENGARUH PENGGUNAAN LSHX TERHADAP PERFORMA MESIN PENDINGIN DENGAN LAJU ALIRAN MASSA YANG SAMA PADA KONDISI TRANSIENT Redaksi Tim Jurnal
JURNAL POWERPLANT Vol 4 No 4 (2017): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (23.464 KB)

Abstract

There are three things that affect the development of of vapor compression refrigeration system : energy saving, non-ODP and non-GWP refrigerant charges. Keep in mind that the effect on GWP refrigerant and ODP substances occurs only when the substance is released into the atmosphere due to leakage in the refrigeration machine or replacement and recycling of refrigerant. Vapor compression refrigeration system is still used, as well as the type of refrigerant used predominantly of HCFC R22 and HFC R404A environmentally damaging and is scheduled to be removed. So to find an alternative refrigerant that is environmentally friendly and has a good refrigeration capacity such as by adding LSHX technology (Liquid Suction Heat Exchanger). LSHX technology is the use of heat exchanger equipment between the liquid line out the condenser and compressor inlet suction line. The present experimental used three refrigerant different i.e HFC R404A, as a comparison used to replace HCFC R22 and for replacement synthetic refrigerant used hydrocarbon R290 in the vapor compression refrigeration system with LSHX In transient conditions until steady conditions. The refrigeration system was charged with 2 kg of mass, 27oC ambient temperature, and for the calculation using software REFPROP 6. This research conducted in Refrigeration Workshop (Bengkel Pendingin) STT-PLN Jakarta. The results obtained showed the effect LSHX with same mass flow rate, trend the steady state temperature of evaporation HCFC R22 decreased of -16,7oC be -18,2oC, HFC R404A of -19,9oC be -22,2oC and HC R290 of -24,2oC be -27,6oC. Increase the COP, for HCFC R22 from 3,29 to 3,39, HFC R404A from 2,76 to 2,85 and HC R290 from 3,43 to 3,50.
Co-Authors Abdul Haris Ahmad Yani Beni Saputra