Waste Heat Recovery From Gas Turbines

Abstract In accordance with the corporate drive towards sustainability & 2030 strategy to reduce Green House Gases (GHG) intensity by 25%, ADNOC Gas Processing strives for energy efficiency improvement in its existing and future assets. With the current focus on Waste Heat Recovery (WHR), ADNOC Gas Processing is looking into energy saving opportunities to improve operational efficiency and reduce fuel gas consumption. This paper presents a comprehensive technical assessment including cost benefit analyses of recovering waste heat from mechanical drive gas turbines for energy savings. Earlier a high- level technical assessment was carried out to assess the potential of recovering waste heat from different heat sources across ADNOC Gas Processing plants. Recovering waste heat from mechanical drive gas turbines indicated promising results. Accordingly, a detailed feasibility study was carried out to evaluate several options to recover energy from gas turbines exhaust. The feasibility study addressed three options of recovering energy from gas turbines exhaust; generating superheated steam, generating power and combined solution of steam & power. The options were assessed in terms of technical feasibility and commercial viability. The waste heat recovery potential was assessed for design as well as actual operating data.