Heat dissipation performance study of electric locomotive storage cooling tower under tunnel heat damage environment
Inview of the heat damage environment in plateau tunnels along a railway in western China,a phase change cold storage cooling tower and its operation scheme for electric locomotive were proposed.Cold-storage and cold-release processes of this cooling tower were simulated,its cooling performance was analyzed and the structure of the heat exchanger was optimized.The results show that when the heat exchanger is running for cold storage,compared with the finless structure,the phase change cold-storage time of the structure with fins on the air side and the structure with fins on the both sides of the shell is shortened from 113 min to 80 min and 47 min,respectively.When the heat exchanger is running for cold-release,the cooling medium(ethylene glycol aqueous solution)is cooled by the phase change cold storage heat exchanger and the effective cooling time(while the outlet temperature of the cooling medium is less than 55℃)of the structure with 8 mm spacing fins on the heat transfer pipeline is extended from 1.5 min(for the finless structure)to 16 min,exceeding the designed requirements(14 min),which solves the heat dissipation problem of locomotive cooling tower.
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