PEMODELAN SISTEM TURBIN GAS PADA APLIKASI ENHANCED OIL RECOVERY (EOR) INJEKSI UAP

• Main Authors: , FENDY SATYA ARISTA, , Dr. Ing. Sihana
• Format: Theses and Dissertations NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2014
• Subjects: ETD
• Online Access: https://repository.ugm.ac.id/129311/; http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=69701
• Institution: Universitas Gadjah Mada

Enhanced Oil Recovery (EOR) is an oil recovery method that involves the injection of fluid which does not originally exist in the reservoir. One of the EOR methods is steam flooding EOR that uses water vapor as the working fluid. Water vapor is formed from pure water that heated inside Once Through Steam Generator (OTSG). The efficiency of OTSG can be improved by using heat from another system. A system that dissipates a lot of heat is gas turbine. Combined cycle between OTSG and gas turbine can be applied because temperature of gas turbine exhaust gas is still above 500oC. Modeling begins with understanding the process that happened in gas turbine. Normalized equation is formulated to simplify the analysis of system response. Model equations are formed into 3 dynamic equations that consist of combustion gas mass flow rate, combustion gas temperature, and shaft rotational speed. The dynamic responses are obtained by changing torque load, OTSG back pressure, and fuel mass flow rate as the system input variables. The characteristic of responses are obtained from the simulation. System responses of gas turbine can be approximated by using first order dynamic model equations. Time constant of shaft rotational speed response is 19.17 s for load torque change, 17.35 s for back pressure change, and 18.27 s for fuel mass flow rate change. Time constant of exhaust gas temperature response is 0.93 s for fuel mass flow rate change