POWER-GEN Asia 2018

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Beneficial Integration of Industrial Gas Turbine Based CCPP in a LNG Storage and Re-Gasification Process (Room Garuda 12, 1st Floor)

This paper describes different technical solutions for integration of LNG re-gasification process in the industrial gas turbine based CCPP and the resulting benefits for plant efficiency and operational flexibility. The example for one possible solution is the already realized project “Delimara”, Malta. In 2013 the government of Malta has adopted a new energy policy. It was decided to drive investment in new electricity generation with state-of-the-art-technology and to reduce the use of fuel oil by conversion of a 150 MW diesel power plant. Thus, the Maltese utility Enemalta has tendered a project involving LNG storage, re-gasification and a power plant. The project was awarded to ElectroGas Malta with GEM Holdings (a group of Maltese companies), Socar Trading and Siemens Project Ventures as shareholders. ElectroGas Malta will operate, maintain and provide fuel for the complete plant throughout the duration of the Power Purchase (PPA) and Gas Supply Agreements (GSA). It will supply natural gas as re-gasified LNG which shall be imported via a new receiving and storage facility. The selected technical solution involves the Siemens Combined Cycle Power Plant (CCPP) SCC-800 3x1C (3xSGT-800 gas turbines, 3xheat recovery steam generators and 1xSST-900 condensing steam turbine) with an output of 205 MWel. This solution allows for flexible, high efficiency load following while, at the same time, providing high availability. The plant will be integrated into the storage and re-gasification process. In order to increase the plant’s overall capacity at higher ambient temperatures, the gas turbine inlet air will be cooled using “waste cold” from the LNG re-gasification plant. We will explain how a solution based on an industrial CCPP using LNG will contribute to meeting the Maltese energy targets. For this solution Siemens is not only the turnkey supplier of the power plant but also an important partner on the financing side, a vital element to making the project viable.