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Simulation of Cooling System for ER24PC Locomotive Diesel Engine and Investigation of the Effect of Ambient Condition on the Cooling System Performance

Niroomand, Reza | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44341 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Saeedi, Mohammad Hassan; Kazemzadeh Hannani, Siamak
  7. Abstract:
  8. Nowadays, computer simulations have an important role in the investigation of the thermal performance of the systems. In this thesis, a software program was developed for simulation of cooling system of an ER24PC Locomotive diesel engine. For this purpose, the C + + programming language is applied. One of the most important components in the cooling system is the radiator. In order to model the radiator, a relationship must be used to determine the heat transfer coefficient for coolant side and air side of the radiator. This relationship can be based on experimental, analytical, or numerical solutions. Offset strip fins are used in radiator of ER24PC locomotives. With application of numerical simulation in these structures, more details of fluid flow such as vortex shedding phenomenon in offset strip fins can be simulated. The result of radiator modeling shows that in order to lose a specific amount of heat in a same condition, replacing the offset strip fins with simple fins increases the volume of the radiator by 2.3 times. Noting that the Locomotives traverse different climate zones, the effect of environmental conditions on the thermal performance of the cooling system is essential. Using the developed software, the temperatures of inlet and outlet of the coolant fluid of the radiator, and the radiator coolant or air fluid temperature distributions can be determined. The ambient temperature, the altitude above sea level, the thermal resistance of the fouling on the air side, and the amount of heat that must be rejected by the cooling system, including its parameters, are discussed. Finally, with considering the influence of each parameter on the thermal performance of the cooling system, a general relationship for prediction of coolant temperature is offered
  9. Keywords:
  10. Simulation ; Cooling System ; Radiators ; Vortex Shedding ; Offset Strip Fins

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