The influence of different orientations and ventilation cases on temperature distribution of the car cabin in the hot soak

Chen, Suifan; Du, Binbin; Li, Qipeng; Duan, Xue

doi:10.1016/j.csite.2022.102401

Cited by 7 publications

(3 citation statements)

References 23 publications

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“…Computational fluid dynamics methods were used for the experiments. The Reynolds number in the cabin of an automobile is relatively small, and the air can be regarded as steady-state turbulence, the flow of fluids in nature needs to obey the three laws of fluid dynamics [4].…”

Section: Methodsmentioning

confidence: 99%

“…To guarantee the precision of the computations while minimizing processing time, an optimal mesh size was determined that balances accuracy and efficiency. Additionally, a mesh independence verification was conducted to ensure that the chosen mesh configuration would provide a suitable simulation environment [4]. The overall grid cell size of the cabin is set to 25 mm, curvature capture and capture proximity are turned on, and all other settings are left at default values.…”

Section: Mesh Segmentation and Validationmentioning

confidence: 99%

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Numerical simulation of hot soak in cabin based on ventilation strategy

Chen,

2024

J. Phys.: Conf. Ser.

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To address the issue of excessive heat within the vehicle’s cabin, this study employs transient simulation methods to explore and analyze how various ventilation tactics and parameters influence the cabin’s temperature distribution and air quality. Findings indicate that the optimal thermal comfort and air quality conditions are achieved through the implementation of a top ventilation strategy. Specifically, with an air supply velocity of 3 m/s, a supply air temperature of 19°C, and an airflow direction of 15°, the air age at the driver’s breathing zone is measured at 18.92 seconds, while it stands at 20.35 seconds at the child passenger’s breathing zone. This ventilation setup achieves an air exchange efficiency of up to 80.1%, nearly complete pollutant removal efficiency, and places the thermal comfort at monitored human body points within a range deemed satisfactory or comfortable. Overall, this configuration yields the most favorable conditions for the comfort of the driver and passengers compared to other scenarios examined.

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Section: Methodsmentioning

confidence: 99%

Section: Mesh Segmentation and Validationmentioning

confidence: 99%

Numerical simulation of hot soak in cabin based on ventilation strategy

Chen,

2024

J. Phys.: Conf. Ser.

Self Cite

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“…Suifan Chen analyzed the effects of four ventilation conditions on the driver and rear occupant. The results showed that when the vehicle is parked outdoors facing east at 14:00, the heat load of the driver and rear occupant is the lowest, and the temperature around the driver is about 52 • C. Meanwhile, roof ventilation is an effective and energy-saving cooling method for both the driver and the passenger [12]. Garrett J.…”

Section: Introductionmentioning

confidence: 99%

A Study of Passenger Car Cabin Pre-Ventilation under the Sun

Zhang,

Li,

Liu

et al. 2023

Energies

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With the increasing intelligence of automobiles, vehicle pre-ventilation can be better controlled. In summer, cars parked in the open air are directly exposed to sunlight; thus, a high-temperature environment is formed in the occupant cabin, which seriously affects the passengers and driver’s riding and driving experience. Meanwhile, lowering the temperature of the passenger compartment from a very high temperature to a comfortable temperature consumes a lot of energy. Therefore, it is increasingly important to study the pre-ventilation of the cabin in order to improve the thermal comfort of the occupant cabin and reduce energy consumption. In this paper, a new theoretical model of a cabin temperature control system is proposed. To support the theoretical model, an outdoor parking temperature rise test was carried out. Environmental parameters were obtained and used as the boundary conditions of the subsequent simulation. Based on the mechanism of the cabin temperature rise, the convective heat transfer coefficient on the body surface, the equivalent heat transfer model of the cabin, the solar radiation model and the physical properties of the air, a computational simulation of the temperature rise in the occupant cabin was carried out, and a simulation of the temperature rise in the occupant cabin exposure was studied. The simulation results were compared with the experimental findings to verify the accuracy of the simulation, which provided a reference for the design of the pre-cooling function of the occupant cabin. This study revealed that the pre-ventilation model developed reduces the vehicle cabin temperature through optimal control of air supply volumes and air supply angles. Furthermore, the developed pre-ventilation model is capable of reducing energy consumption, thereby reducing greenhouse gas emissions.

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