Collaborative control of temperature and velocity fields inside refrigerated transportation carriages on highways

Based on the coordinated control of temperature and velocity fields inside refrigerated transportation carriages on highways, starting from the energy conservation synergy equation and turbulent kinetic energy equation, the air parameters of heat transfer working fluid are set to explore the synergy of velocity and pressure fields. For the purpose of evaluating temperature uniformity, this study qualitatively verifies the simulation and diffusion of three fields along the longitudinal section inside the refrigerated compartment, and divides the heat transfer and low resistance performance of the uniform flow plate with circular holes, elliptical holes, and regular hexagonal holes into numerical simulation comparisons and analyses. After the intake duct of the refrigerated compartment is equipped with an elliptical hole intake baffle, the maximum temperature that deviates along the width of the compartment during the full load process decreases from 2.53 ℃ to 1.27 ℃, and the temperature scale difference decreases from 0.642 ℃ to 0.332 ℃. The effect explains that the flow resistance of the inlet duct is relatively small, which effectively reduces the pump power consumption of the refrigeration unit. The temperature diffusion is stable and even, and there is good synergy among the rate field, temperature gradient field, and pressure gradient field.

The cooling capacity generated by the refrigeration unit of the road refrigerated transport vehicle is rotated by the axial flow fan, forming a circulating flow along the intake duct, interior of the compartment, and return air duct from the front to the rear of the vehicle. The parameters of cooling rate and pressure generally decrease from the front to the rear of the vehicle, while the density tends to settle from top to bottom. By analyzing the effect of the single uniform flow plate structure on heat transfer and flow resistance in the inlet duct, the comprehensive performance of the inlet duct plate side can be accurately shaped to a certain extent. In the process of refrigerated transportation, adopting an inlet with average heat transfer enhancement and high efficiency and low resistance, analyzing and comparing the airflow orifice plate structure with practical application value, can effectively reduce energy consumption from an engineering perspective, save transportation costs per unit mileage, and improve the economic efficiency of refrigerated vehicles.

Therefore, it is not only necessary to consider the impact of different structural characteristics of a single intake orifice plate on heat transfer performance from a micro perspective, but also to weigh its impact on the actual diffusion of cold flow through the intake duct from a macro perspective. This article analyzes the influence of the orifice structure of the differential inlet on its heat transfer efficiency and inlet wall resistance, based on the other flow characteristics of the fluid, namely the change of Reynolds number within certain limitations. By improving the synergy of the three fields inside the refrigerated transportation carriage, the pump power consumed by the refrigeration unit can be effectively reduced, and the refrigeration efficiency and temperature uniformity during the refrigerated transportation process can be improved.