Larsen & Tubro CCPP — Konaseema HRSG Project

Larsen & Toubro Limited (L&T) is the EPC for two gas-based combined cycle power plants, at Vemagiri and Konaseema in Andhra Pradesh, India, on a turnkey basis. The power block for Konaseema includes two 140-megawatt gas turbine generators, two triple-pressure heat recovery steam generators connected with a bypass arrangement for flue gas, and a steam turbine generator in a 2-2-1 configuration.

For quick release of engineering outputs for manufacturing, the L&T design team opted to work in parallel on all fronts, including structures, equipment (exchangers, steam drums, etc), piping, and so on. Since the teams worked at two locations, it was critical that the structural and equipment designs could be integrated on a single platform, and for this purpose L&T used AutoPLANT 3D.

The piping engineering team used the 3D model to lay out pipes and valves. Cable trays were taken up for layout in 3D after the piping was substantially completed.

L&T used AutoPLANT 3D to detail most components and ensure that layouts were free of interference. It shared the 3D model with the site team using the AutoPLANT Explorer .NWD export file format. This eased site construction and resolution of discrepancies.

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