April 2012

Bonus Report: Rotating Equipment

Use better designed turboexpanders to handle flashing fluids

New models eliminate vibration problems and improve process reliability

Kaupert, K., Energent

Millions of dollars or euros in revenue are creatively found by clever process engineers through flashing liquid turbines. These turbines convert a liquid into a vapor for hydrocarbon processes. A flashing liquid turbine generates electricity and concurrently removes heat from the process fluid. For simple electric-power-generation applications, the obvious benefit of a flashing liquid turbine is generating power on a turbine shaft while a liquid is flashing. This power can be used to drive a generator. Examples of this case include waste-heat-recovery systems and geothermal plants where the so-called triangular power cycle approaches an ideal power cycle for sensible heat sources.1 B

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