Evaluation of furnace efficiency

Abstract

Furnaces and fired heaters provide the energy associated with running hydrocarbon processes and chemical plants. In this project the suitable and best way to gain high efficiency of the furnace has been determined by manipulating the parameters that affect in efficiency of the furnace (excess air, pre-heating, stack temperature, and the effect of the presence of the nitrogen to the furnace efficiency). Aspen exchanger design and rating V8.8 (EDR) was used to design fired heater and using the results in aspen HYSYS V8.8 todetermine the effect of these parameters consequently obtaining the best effective way for high efficiency which represent in reducing the percent of nitrogen. This project also includes controlling and monitoring three major parameters: (Fuel gas/fuel oil pressure, Excess air and Furnace draft fan), and using excel sheets for estimating the Cost of the furnace.