Operation optimization for gas-fired infrared radiant heating system based on CFD

Develops the mathematical model for the temperature field of the subway locomotive garage with gas-fired infrared radiant heating system by Airpak software. Through the full-scale model simulation in the typical stationary phase and contrast with the measured data, verifies the accuracy of the model. Through the survey and analysis of existing operation strategy, and combined with the actual use situation, presents the “track priority” strategy. The established mathematical model is used for these two strategies. The results show that both of the strategies meet the design requirements. In “track priority” strategy, the vertical temperature gradient in workspace is 6%~18% lower than that with the existing strategy when there are different quantities of locomotives, so the temperature distribution is more reasonable. By calculating the hourly energy consumption of the burner under the two strategies in typical heating day, the “track priority” strategy saves gas by 116 m3/d, which has the overall energy-saving rate 7.0%. So the “track priority” strategy is feasible from the perspectives of application, energy saving and economy, which can also provide references for operation strategy of the same type of locomotive garage with gas-fired infrared heating system.