Optimization of Heat Recovery System Based on Different Types of Finned Tube Heat Exchangers

In order to enhance the heat recovery efficiency and net energy consumption ratio of the run-around heat recovery system applied in gas and oil field and other buildings, this study replaces the conventional heat exchangers with wavy fin tube heat exchangers, slotted fin tube heat exchangers, and fin tube heat exchangers equipped with longitudinal vortex generators.The coupling simulation model of the run-around heat recovery system is established using MATLAB and FLUENT. The coupling model is utilized to simulate and calculate the heat recovery rate and net energy consumption ratio of the heat recovery system with different types of heat exchangers in various seasons, as well as at different temperatures during winter in a hot summer and cold winter region (Wuhan). The simulation results demonstrate a significant enhancement in the heat recovery rate and net energy consumption ratio of the heat recovery system when replacing the conventional heat exchanger with a finned tube heat exchanger incorporating corrugated fins, slotted fins, and longitudinal vortex generators .Among them, the heat recovery rate of the finned tube heat exchanger with slits exhibits the highest increase, while the net energy consumption ratio of the finned tube heat exchanger with longitudinal vortex generator demonstrates the most significant enhancement.The utilization of a finned tube heat exchanger with a complex structure can enhance the optimization of the run-around heat recovery system. However, when considering the overall energy consumption reduction capability of the entire system, it is essential to account for the increased energy consumption associated with its complex structure.