TY  - EJOU
AU  - Li, Shuang 
AU  - He, Suoying 
AU  - Cheng, Shen 
AU  - Wu, Jiarui 
AU  - Meng, Ruiting 

TI  - Experimental and Numerical Simulation Research on Aerodynamic Field of Integrated Exhaust End of Natural Gas Distributed Energy Station
T2  - Energy Engineering

PY  - 2025
VL  - 122
IS  - 6
SN  - 1546-0118

AB  - In view of the situation of multi-temperature, multi-medium and multi-discharge equipment on the integrated exhaust end platform of a natural gas distributed energy station, which is compact in layout, mutual influence, complex aerodynamic field and complex heat and mass transfer field, the temperature field and aerodynamic field of the platform were comprehensively studied through field experiments and numerical simulation. The research results show that the high temperature flue gas discharged from the chimney is hindered by the chimney cap and returns downward. The noise reduction walls around the chimney make the top of the platform pressurized under the crosswind, as a result, the inlet air temperature of each cooling equipment is generally higher than the ambient temperature, and the cooling efficiency is extremely low. According to the numerical simulation results, the effect of hot gas recirculation is intensified by the ambient crosswind. With the increase of the ambient crosswind, the flue gases coverage expands. The influence of ambient crosswind on inlet air temperature first increases and then decreases within the range of 1–8 m/s, showing a nearly normal distribution. Secondly, this study innovatively designed a new V-shaped chimney cap, compared with the A-shaped chimney cap, the new chimney cap effectively reduces its own obstruction to the smoke and changes the flow path of the smoke. After the smoke rises for a certain distance, the smoke returns downward, which effectively reduces the temperature of the smoke and thus reduces its impact on the air inlet of the cooling equipment. On-site measurement found that the cooling efficiency of various cooling equipment has increased by an average of 27.3% compared to before the renovation, and centrifuge’s refrigeration capacity increased by 0.78 GJ/h.
KW  - Complex flow field; cross-flow cooling tower; hot gas recirculation; ambient crosswind; chimney cap reconfiguration design

DO  - 10.32604/ee.2025.062216