Analysis of Exergy Efficiency and Influencing Factors of Tube Heating Furnace in Oilfield Enterprises

Abstract In the energy consumption of surface engineering systems in oilfield enterprises, heating furnaces account for a significant proportion. Therefore, it is necessary to analyze and study their operational performance. This article conducts an exergy analysis of tubular heating furnaces from the perspective of energy quality. First, an exergy balance model and exergy analysis evaluation criteria are established for the energy system of the heating furnace. Then, the internal and external exergy losses in the heating furnace's energy system are comprehensively considered to identify weak points in the energy system and reflect the utilization of energy quality. The exergy analysis results show that the highest proportion of exergy losses in the heating furnace system is attributed to the heat transfer process. The excess air coefficient, exhaust temperature, and outer surface temperature of the furnace are inversely proportional to exergy efficiency. Based on the static exergy analysis results, measures to improve the exergy efficiency of the heating furnace are proposed: controlling the excess air coefficient within a reasonable range, reducing the exhaust temperature, and lowering outer surface temperature of the furnace. These measures can effectively enhance the energy utilization level of the tubular heating furnace and provide reference and assistance in meeting emission reduction requirements.