Water Cooled Duct

Gas Turbine Test Rigs often are integrated with exhaust cooling ducts so that the hot gas stream can be safely released. The ducts are cooled by water circulating in an outer jacket, and water sprayed directly into the flow stream cools the exhaust gas. The ducts and water jackets are designed and certified to the applicable Pressure vessel jurisdiction, eg the ASME Code, CR/PED (Europe) or SELO (China). The design incorporates allowance for thermal expansion differential between the duct and the jacket and controlled water flow gaps to control water flow and temperature of the inner wall.

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