DESIGN OF BRINE INJECTION PIPELINE AT ULUBELU GEOTHERMAL POWER PLANT SYSTEM CLUSTER E TO CLUSTER R1 AND R2

• Main Author: Maximilian S. Wongkar, Marvin
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/68807
• Institution: Institut Teknologi Bandung

Geothermal potential as the largest alternative energy source in Indonesia reaches 23.9 Giga Watt (GW). However, the utilization of this energy is only 8.9% or 2,130.6 MW. This has prompted the government through the Ministry of Energy and Mineral Resources to target an increase in geothermal utilization to 16.8% or 7,241.5 MW by 2025. The utilization of geothermal energy can be maximized by increasing the construction of qualified geothermal power plant facilities. In this undergraduate thesis, a brine piping system design was carried out at the Ulubelu Geothermal Power Plant Cluster E to Cluster R1 and R2. This design includes hydraulic analysis, selection of diameter, pipe material, pipe thickness, analysis of potential silica scalinh, selection of pipe insulation, analysis of maximum span distance and expansion loop. The piping system is also tested against sustain loads, thermal expansion loads, earthquake occasional loads, and wind occasional loads based on the ASME B31.1 Power Piping code. The piping system modeling and loading simulation were carried out using Bentley AutoPIPE software. Based on the analysis, it is concluded that the brine piping system has an NPS 20 Schedule Standard diameter with API 5L Grade B carbon steel material. The piping system uses calcium silicate insulation with a thickness of 65 mm. The stresses that occur in the piping system have met the safe criteria of ASME B31.1 in the two models made, namely the initial modeling with a maximum stress value of 132,3 MPa (0.94) due to occasional earthquake loads and the modified modeling with a maximum stress value of 159,4 MPa (0.90) due to thermal expansion. The parameter study shows that the piping system will fail if the earthquake reaches 0.50 gravitational acceleration and a wind speed of 400 km/hour.