ASME U Stamped HP Evaporator Shell & Tube Heat Exchanger for Geothermal ORC Duty
This is a heavy-duty HP (High-Pressure) Evaporator engineered for a 28 MW geothermal Organic Rankine Cycle (ORC) power plant. The unit transfers heat from geothermal brine to the organic working fluid n-Butane C.G. on the shell side, vaporizing it ahead of the turbine. The exchanger is ASME Section VIII Div.1 + TEMA coded and ASME U-Stamp certified, designed for high-pressure, high-temperature geothermal service with full corrosion allowance on both sides.
| Parameter | Shell Side | Tube Side |
|---|---|---|
| Fluid | n-Butane C.G. | Brine |
| Design Pressure | 42 bar | 32 bar |
| Design Temperature | 200 °C | 220 °C |
| Operating Temperature | 140 °C | 150 °C |
| Metal Temperature (Tubesheet) | 165 °C | – |
| Corrosion Allowance | 1.587 mm | 1.587 mm |
| Number of Passes | 1 | 2 |
| Joint Efficiency (X-Ray) | 1.0 / 100% | 1.0 / 100% |
| Component | Material Grade |
|---|---|
| Shell & Cover | SA-516 Gr.70 |
| Channel | SA-516 Gr.70 + SS 316L cladding (3 mm min.) |
| Tube Bundle | UNS S31803 / 2205 (Duplex Stainless Steel) |
| Tubesheet | SA-266 Gr.2N + SS 316L weld overlay (0.10 mm min.) |
| Bolting | SA-193 B8/B8M / SA-194 Gr.8M |
| Gaskets | Kamprofile 316L + Graphite |
| Baffles & Supports | Carbon Steel (C.S.) |
