Increase the heat sink area of ​​the radiator by increasing the size of the radiator core. Key Points 2: Change the radiator from the original three-row pipe to four-row pipe, and reduce the height of the radiator by 70mm to increase the radiator area by 21%. While lowering the height of the radiator, the area of ​​heat dissipation can be significantly increased, which is conducive to improving the passing of the entire vehicle, and does not involve changes in the layout of the entire vehicle. Under the same usage conditions, the heat dissipation of the radiator is only 7.5% higher than that of the original radiator, but the wind resistance is increased by 45% to 60%, and the cooling effect is not improved obviously. At the same time, due to structural changes in the radiator, manufacturing costs have increased substantially, and economic efficiency has also been poor. Therefore, Option 2 is not feasible. Change the original copper heat sink to aluminum heat sink Solution 3 Highlights: The heat sink has the same dimensions, replace the original copper radiator with an aluminum radiator, thicken the heat sink (by), and widen it appropriately. The spacing of the heat fins achieves the effect of increasing the heat dissipation area without increasing the wind resistance. It is possible to maintain the same dimensions of the radiator without affecting the layout of the entire vehicle. Only through the change of the material and the improvement of the internal structure, the heat radiation area of ​​the radiator is significantly increased, the heat dissipation is increased, and the problem of high water temperature is solved. At the same time, since the price of aluminum is lower than that of copper, the weight is reduced by 25% to 40%. Therefore, this solution can reduce manufacturing costs and improve economic efficiency.
Through in-depth discussion, demonstration and comparison of the feasibility and economy of each scheme, an improved scheme for replacing the original copper radiator with an aluminum radiator was finalized. After the pilot prototype and test plan of the radiator sample are determined, according to the thermal performance requirements of the Xichai engine and the comparison of the size of the heat dissipation area of ​​the Jiefang company and Liuzhou radiator, and combining with the components associated with the water tank as much as possible to reduce the company’s Based on the principles of management and production impact, several high-horsepower engine tanks (1301020-L01,) with different horsepower segments were designed, prototypes were prototyped, and wind tunnel laboratory tests were performed on the prototypes.
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