Research on Self-adaption Model of Cooling Intensity for Construction Vehicle Based on CFD and ε-NTU

Abstract

To improve the stability of power take-off and energy conservation of cooling system, it is essential to investigate a control model of cooling system for the working engine under varied ambient temperature. A Double-drum roller from a manufacturer in China was employed as the research basis for a self-adaption model of cooling intensity. At first, a numerical investigation was performed on its engine cabin, and the results were experimentally validated. Secondly, a self-adaption model based on ε-NTU method was solved with the combination of Ferrari and Shengjin methods, and finally presented in terms of heat transfer rate, fan rotation speed and ambient temperature. At last, under a constant heat flux of the radiator, the numerical results and predicted outcomes were compared at −30°C and 20°C to confirm the accuracy of that model. The results stated that the maximum error between experimental data and simulation results is 7.89%, which validates the correctness of the implemented numerical analysis. The Ferrari and Shengjin methods are eligible to solve the derived model, which is shown with heat transfer rate, fan rotation speed and ambient temperature. The deviation between numerical results and estimated values are 0.8°C at 20°C and 0.75°C at −30°C, respectively. The conclusions of this work could provide a theory basis and reference for the relative research on the self-adaption model of cooling intensity for construction vehicles.