| Title | Predicting FCDS and Power Plant Chemistry of the Different Power Plants in the Leyte Geothermal Power Plant |
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| Authors | AT.N. Salazar, R.R. Villa Jr., and E.H. Alcober |
| Year | 1997 |
| Conference | PNOC-EDC Geothermal Conference |
| Keywords | |
| Abstract | Two new power plants were installed in Malitbog and Upper Mahiao sectors of Leyte Geothermal Power Project in 1996. Three more will be commissioned in Mahanagdong A & B and South Sambaloran sectors in1997 bringing the total power output of the entire field to about 650 MWe. These forthcoming operations entail massive extraction of fluids which, consequently, will generate waste brines and condensates. It is there fore, essential to predict the chemistry of the fluids from each power plant and fluid collection and disposal System FCDS prior to commercial operation in order to formulate field-wide management schemes. Each FCDS and power plants has exclusive features. Upper Mahiao's Ormat power plant utilizes a geothermal combined cycle unit (GCCU) consisting of a back pressure turbine and binary cycle units (OECs). This will be supplied with steam porn a single-stage flash FCDS at 1.2 MPa separation pressure.121alitbog and South Sambaloran power plants have an integrated bottoming cycle plant, while Mahanagdong A & B power plant include a topping cycle plant upstream of their respective condensing turbines. Mahanagdong will utilize two-stage flash FCDS. The first flashing happens at 1.2 MPa which will run the topping cycle plant at 1.2 MPa . The brines will be flashed further at 0.7 MPa to supply the low pressure condensing turbines together with the topping cycle exhaust steam. All the physical and chemical data used in the simulation process were taken from the results of the medium-term discharge (MTD) testing of all production wells. The table below summarizes the results of the simulation: |