Heat Exchanger Network Retrofit Design for Energy Recovery in Petroleum Refinery Distillation Processes

Abstract

Petroleum refinery distillation processes consume substantial amounts of thermal energy, making energy recovery and process integration essential for improving operational efficiency and reducing environmental impact. This study presents a heat exchanger network retrofit design for energy recovery in refinery distillation systems under varying process operating conditions. The proposed retrofit framework integrates pinch analysis, process integration techniques, thermal performance evaluation, and heat recovery optimization to enhance energy utilization and minimize utility consumption within refinery operations. A comprehensive analytical and simulation-based investigation was conducted to evaluate the influence of stream temperature profiles, heat exchanger configuration, flow arrangement, heat transfer coefficients, and process constraints on overall network performance and energy savings. Existing heat exchanger networks were analyzed to identify thermal inefficiencies, heat recovery opportunities, and potential retrofit modifications for improved process integration. Results demonstrated that optimized heat exchanger network retrofit significantly reduces external heating and cooling utility requirements while improving thermal efficiency and process sustainability. The study further revealed that strategic integration of process streams and enhanced heat recovery pathways contribute to reduced fuel consumption, lower greenhouse gas emissions, and improved refinery operating economics. Comparative analysis indicated substantial improvements in energy recovery efficiency and reduced operational costs compared to conventional refinery heat management practices.