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GAS REGULATOR SEAT TEMPERATURE DURING GAS TURBINE START-UP

Pressure regulators are to be employed at a gas-fired power station to reduce upstream gas pressures from a maximum of 15 MPa to approximately 3.5 MPa. Due to the Joule-Thompson effect, the resulting gas temperature drops could be in the region of 55°C. The dew-point temperature of the hydrocarbons (gas) flowing through is -15°C and the minimum ambient temperature of the area is -6°C. Thus the regulators could potentially be subjected to gas at -61°C at start-up. According to the valve manufacturer, temperatures as low as -20°C can be tolerated for some time, provided that condensation does not occur.

“Anyone familiar with transient heat transfer of flow systems with complicated geometries will tell you that such an analysis would be beyond the capability of most engineering houses. Flownex® enabled me to obtain reliable ball-park results in a matter of a few hours. When the potential cost of equipment failure is tens of millions of dollars, this is an amazing result which highlights the incredible power and flexibility of Flownex®.”
Gasco PTY LTDHannes van der Walt | Senior Thermal & Process Engineer

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