Analysis of Steam Power Plant at Kaduna Refining and Petrochemical Company from Exergetic Perspective

Abstract

This study presents the exergetic analysis of steam power plant at kaduna refining and petrochemical company limited. The aim of this research is to analyze the system components separately, and to identify and quantify the sites having the largest exergy losses. The performance of the plant was established and detailed break-up of exergy destruction of the considered plant has been presented. Computer softwares (ASPEN HYSYS, AUTOCAD and MICROSOFT EXCEL) were used for the simulation and calculation of properties that include stream enthalpy and entropy using the flow rate, working temperature and pressure of each equipment gotten from the company, at an assumed dead state temperature of 25ºC at pressure of 101KPa. The analysis shows that The total exergy destroyed in the system is 209000kW, which makes about 18% of the total exergy entering the system The site having the largest exergy destruction was found to be in the boiler, having a 20000KW destroyed with a percentage performance loss of 36%, followed by the condenser, with 5880KW destroyed and percentage performance loss of 6%.Where as other equipments have total exergy efficiency of 2%. At end of this study, it can be suggested that the air for combustion should be properly preheated and the boilers should be properly lagged to avoid work loss. Analysis should be done periodically for each unit of the plant as a performance test; this will be helpful for maintenance and replacement decisions.