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应用Airpak软件建立了燃气辐射供暖系统的地铁机车停车库温度场数学模型。通过对典型稳态阶段进行全尺寸模拟,并与实测数据进行对比,验证了模型的正确性。通过对既有策略的调研与分析,结合车库实际使用情况,提出了“轨道优先级”策略,并对两种策略下的车库温度场进行模拟,结果表明,两种策略均满足室内温度设计要求,并且针对停放不同数量机车的情况,“轨道优先级”策略下的工作区竖直方向上的温度梯度比既有策略低6%~18%,温度分布更合理。通过计算典型供暖日两种策略下的燃烧器逐时能耗,得到“轨道优先级”策略比既有策略耗气量节省116m3/d,节能率达7.0%。因此,“轨道优先级”策略从实用、节能、经济角度均是可行的,可为同类型采用燃气辐射供暖系统进行分区供热的机车库的运行策略提供参考。
Airpak software was used to establish the mathematical model of the temperature field in the underground locomotive garage of a gas radiant heating system. Through the full-scale simulation of the typical steady-state stage and comparison with the measured data, the correctness of the model is verified. Based on the investigation and analysis of the existing strategies and the actual usage of the garage, a “track priority” strategy was proposed and the garage temperature field under the two strategies was simulated. The results show that both strategies satisfy the indoor temperature And the temperature gradient in the vertical direction of the working area under the “track priority” strategy is 6% ~ 18% lower than that of the existing strategy and the temperature distribution is more reasonable for the parking of different numbers of locomotives. By calculating the hourly energy consumption of the burner under the two typical heating days, the “orbit priority” strategy can save 116m3 / d of air consumption and the energy saving rate of 7.0% compared with the existing strategy. Therefore, the “orbit priority” strategy is practicable, energy-saving and economical. It can provide reference for the operation strategy of the same kind of garage with district radiant heating system using gas radiant heating system.