Science – Society – Technology
Table 1 Component specification of the demonstration plant
From: Making use of geothermal brine in Indonesia: binary demonstration power plant Lahendong/Pangolombian
Component | Description |
|---|---|
Primary heat exchanger | 2 × Shell-and-tube heat exchanger with brine on the tube side and hot water (HW) on the shell-side; 2xAFT-types in series, heat transfer area: 2 × 310 m2, Thermal capacity = 2 × 2250 kW Heat transfer rate = 1100 W m−2 K−1, LMTD = 7.1 K Each vessel with 2 passes on shell and tube side Tube design: OD = 19.05 mm, Thickness = 1.65 mm, Length: = 6.1 m, Pitch = 28.575, Tube pattern:90, Number = 2 × 860 Shell side design: cross baffles, Cut = 21.2%, Spacing = 598 mm, Number = 9 (each pass) Design data tube side: flow rate = 35 kg/s, inlet temperature = 172.5 °C, outlet temperature = 142.5, pressure drop = 12 kPa Design data shell side: flow rate = 35 kg/s, inlet temperature = 135 °C, outlet temperature = 165 °C, pressure drop = 23 kPa |
Evaporator/preheater | Shell-and-tube heat exchanger with hot water on the tube side and working fluid on the shell-side; staggered arrangement |
Recuperator | Shell-and-tube heat exchanger with finned tubes: working fluid vapor on the shell-side and liquid on the tube side |
Condenser | Shell-and-tube heat exchanger with working fluid on the shell-side and cooling water (CW) on the tube side |
Dry cooler | Horizontal tube bundle with finned tubes, cooling water flow inside the tubes and forced air flow across the tube bundle; forced air flow by means of variable speed fans Heat exchange surface: 6 × 2999.8 m2 Surface reserve: 26% Thermal capacity: 6 × 583.0 kW Design data air-side: Volume flow rate = 6× 157,127 m3/h, Inlet temperature = 30 °C, Outlet temperature = 43 °C Design data tube-side: Volume flow rate = 6 × 50.7 m3/h, Inlet temperature = 49 °C, Outlet temperature = 39 °C, Pressure loss = 0.28 bar Heat transfer coefficient: 36.52 W m−2 K−1 Electrical power consumption: 6 × 5.88 kW |
Turbogenerator | Hermetic turbogenerator with radial-inflow, nozzle stage and axial outflow; rotational speed 12,000 rpm |
Working fluid pump | Magnetically coupled centrifugal pumps; two pumps in parallel, head = 214 m, flow rate = 2 × 26 m3/h |
Hot water pump | Variable speed centrifugal pump: Head = 25 m, flow rate = 150 m3/h |
Cooling water pump | Variable speed centrifugal pump: Head = 16 m, flow rate = 370 m3/h |