24 | Page Journal of Advanced & Applied Sciences (JAAS) Volume 03, Issue 01, Pages 24-31, 2015 ISSN: 2289-6260 Efficiency Improvement of Warri Refining and Petrochemical Company Gas Turbine Plant through Waste Heat Recovery Albert Obanor a , Gregory Dolor b , Henry Egware c* , Sufianu Aliu d acd Department of Mechanical Engineering, University of Benin, P.M.B 1154, Benin City, Nigeria b Department of Mechanical Engineering, Delta State Polytechnic, Otefe – Oghara, Delta State, Nigeria * Corresponding author. Tel.: +2348028938141; E-mail address: henryegware@yahoo.com c* , aiobanor@yahoo.com a , dolorakpog@yahoo.com b , sufianu.aliu@uniben.edu d A b s t r a c t Keywords: Efficiency, Heat Recovery, Cogeneration, Gas Turbine. The efficiency of Warri Refining and Petrochemical Company (WRPC) Gas Turbine Plant was revealed as 6.83% and 76.95% of fuel input was being lost through flue gases as waste heat by a previous study. To improve the performance of the plant, the waste heat must be utilized. Analysis of the utilization of waste heat by incorporating a Heat Recovery Steam Generator (HRSG) for combined Heat Power (CHP) system in WRPC Gas Turbine plant was carried out in this paper. Performance data was obtained from the existing WRPC Gas Turbine Plant and a model of the cogeneration plant was used for the study. Preliminary analysis results revealed the addition of 4.158MW for electricity power and 7.722MW for thermal process while the efficiency increased from 6.83% for simple gas cycle to 18.91% for the combined Heat Power system. In addition, the fuel saving per annum for using the proposed model is ₦1.071 billion ($5.786 million). Therefore utilizing the waste heat from the plant by incorporating HRSG for cogeneration system improves efficiency and reduces local environmental pollution, making it an attractive investment option for energy utilities managers. Accepted:28 February2015 © Academic Research Online Publisher. All rights reserved. Nomenclature Cp, a, exh, Specific heat capacity at constant pressure of air, exhaust gas, oil & water (kJ/kgK) CF Cost of Fuel FS Fuel Saving LF Load Factor h Specific enthalpy (kJ/kg) LHV Lower heating value (kJ/kg) MSCF Mass per Therm ṁ Mass flow rate (kg/s) OT Operational Time p Pressure (bar) P Power (MW) Q Heat supplied/removed rate (MW) s Specific entropy (kJ/kgK) t Temperature ( 0 C) T Absolute temperature (K) ɳm Mechanical efficiency ɳg Generator efficiency ɳo Gas Turbine Power Plant efficiency ɳoverall Overall combined cycle efficiency vf Specific Volume of Water