Design of Steam Production Facility Piping System at the Geothermal Power Plant System Case Study: Dieng Geothermal Power Plant

• Main Author: Setiadi, Farid
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/39268
• Institution: Institut Teknologi Bandung

Human needs for primary energy and electricity in Indonesia is increasing, while the source of the fuel used from fossil fuels reduced in number. Geothermal become one of alternative energy solutions that can be utilized for power plant generation. This final project conduct the design of steam production facility piping system at the geothermal power plant system Dieng PAD 29 and PAD 30. The design include hidraulic analysis, selection of pipe diameter, pipe material, and pipe thickness based on code ASME B31.1 power piping, and the last is stress analysys and integrity modelling of piping system. The results obtained from the hydraulic analysis in accordance with the criteria at PAD 29 to the tie-in PAD 7 at 12,91 bar, 191,3 ° C, 10,74 MW, and for PAD 30 to tie-in PAD 28 at 10,8 bar, 183,3 ° C, 24,3 MW. For the selection of pipe material selected ASTM A53 Grade B with the results of the prediction of corrosion on the pipe 2-phase, brine, and wet steam at 20 mpy, while to dry steam at 5 mpy. Integrity of the modified power piping systems are safe from various types of loads. The boundaries of the integrity on PAD 29 shows the system will fail if the well head moved up and down as far as 0,7 m or 0,4 m, the operating pressure up to 29 bar, hit by an earthquake up to 0,7 times from the acceleration of gravity, or when experiencing a wind load of 140 km / h. While the boundaries of the integrity on PAD 30 shows the system will fail if the well head moved up and down as far as 0,6 m or 0,3 m, the operating pressure up to 22 bar, hit by an earthquake up to 0,7 times from the acceleration of gravity, or when experiencing a wind load of 100 km / h.