Cooling system for a vehicle

Abstract

Disclosed is a cooling system for a vehicle, in which coolant coolant, a blend of an antifreezing solution and water flowed into a radiator generates turbulent flow when a vehicle is in a state of a critical driving mode of a vehicle for example, a hill-climbing mode, thereby enhancing heat radiating performance and reducing pressure drop amount at the same time.

1 . A cooling system for a vehicle, in which coolant, a blend of an antifreezing solution and water which passed through an engine by a pump flows through a pair of tanks and a radiator including a header at one side coupled with the tank at one side to which the coolant is supplied, heat exchange tubes which is structurally fastened to and communicated with the header at one end portion thereof, a header at the other side coupled with the tank at the other side which is structurally fastened to and communicated with the other end portion of the heat exchange tubes to discharge the coolant to the engine, and fins fixedly brazed between the heat exchange tubes,
 wherein the cooling system includes a thermostat for adjusting opening/shutting depending on the temperature of the mixed solution which passed through the engine to prevent overheating of the engine and cause the mixed solution to be flowed into the radiator in a flow rate of 60 to 80 L/min when the engine is operated in a high rpm and in less flow rate when the engine is not operated in the high rpm,   the radiator has a core width of 12 to 15 mm, a distance between outmost tubes of 300 to 600 mm, a tube outer width (Th) of 1.7 to 1.9 mm, and a tube material thickness (Tth) of 0.15 to 0.24 mm, and the tube is made of aluminum material, and   the mixed ratio of the antifreezing solution and water in the coolant is 1:1, and the flow of the coolant is a completely developed turbulent flow region having a Reynolds number of 2,100 or more when the flow rate is 60 to 80 L/min and a transition from laminar flow to turbulent flow at a flow rate of 40 L/min or less.   
   
   
       2 . The cooling system as set forth in  claim 1 , wherein, when the flow rate of the coolant is in the range of to 80 L/min and the temperature thereof is 100° C., the flow of the coolant has a Reynolds number of 2,100 or more, a transition from laminar flow to turbulent flow occurs at a flow rate of 40 L/min or less. 
   
   
       3 . The cooling system as set forth in  claim 1 , wherein Fh the height of the fin is in the range of 5.3 to 5.8 mm. 
   
   
       4 . The cooling system as set forth in  claim 1 , wherein the thickness of the fin is in the range of 0.05 to 0.06 mm. 
   
   
       5 . The cooling system as set forth in  claim 1 , wherein the heat exchange tube is a flat type with no dimple in an interior thereof. 
   
   
       6 . The cooling system as set forth in  claim 1 , wherein the radiator is a cross flow type.