PDO Pumps Energy Saving Journey

Abstract Petroleum Development Oman (PDO) purpose is to "build a sustainable and low-carbon future to maximise value for Oman". In line with this, the Rotating Equipment function has begun an energy efficiency journey by saving electrical power, reducing fuel gas consumption and cutting Greenhouse Gas (GHG) emissions, thereby also reducing Operating expenditure (OPEX) and its Unit Operating Cost (UOC). A study has been initiated to look for energy efficiency opportunities by checking the running parameters of equipment units compared to their design as some pieces of equipment are running inefficiently due to overdesign or process conditions have changed over the years. The study usually starts by analysing the losses from a machine using main parameters such as suction/ discharge pressure, flow, speed and efficiency. A forecast reaching 20 years ahead is included in this study to understand the required hydraulics in the future and the design required to accommodate the peak condition. After then verifying a technical proposal, a study is then undertaken to explore the best approach to re-rate the equipment by trimming the impellers, change or de-stage them, in the case of multistage machines. To date, PDO has completed the re-rating of 20 pumps with a total yearly power saving of 7.4 MW, which is the equivalent of US$2.9 million per year and 38,000 Tonnes of CO2 emissions annually, the equivalent of US$2.3 million per year. Currently, we are executing five projects and four feasibility studies to verify the extent of such attractive savings. In this paper we will showcase the journey of PDO's pumps energy savings.