Austral Corrects Erroneous Analysis on Fast-Track Project with CAESAR II

 World’s first facility combining solar energy with conventional gas generation

Austral Diseños Industriales (Austral) provided the engineering and analysis for an innovative US$441 million project. The integrated solar combined cycle (ISCC) plant in Hassi R’mel, Algeria, is the world’s first facility combining solar energy with conventional gas generation. The 170 megawatt (Mw) power plant includes 20 Mw solar fields added to the 150 Mw from gas and steam turbines to produce energy for export to Europe via undersea cables.

The project included the HRSG boilers and air condenser and uses a hot oil fluid (HTF) plant to exchange energy with water to generate steam of 160,000 Kg/h at 92 bar pressure at 370°C. The solar field contains 183,000 m2 of mirrors and ASTM A106 Grade B pipe in varying diameters with temperatures of 400°C and 115 bar pressure.

With a short 33-month project schedule and construction already in process, Austral had few possibilities to change the design. A major challenge came when it discovered the previous stress analysis was erroneous because the system had been analyzed as independent pipes and the connections with the equipment analyzed as anchor points without movement and without consideration of the maximum loads over nozzles.

Using CAESAR II for stress analysis, Austral was able to show the client the system’s complexity and how it all works together. Austral included the initial model’s problems and the needed changes, correcting these problems to guarantee a safe startup and operation. The team used the Isogen module built into CAESAR II to automatically produce the isometric drawings and then produced the calculation deliverables.

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