Experimental Investigation of Thermal Performance in a Vehicle Cabin Test Setup With Pcm in the Roof

Frontiers in Automobile and Mechanical Engineering

Purusothaman, M.^1 ; Kota, Saichand^1 ; Sam Cornilius, C.^1 ; Siva, R.^1

School of Mechanical Engineering, Sathyabama University, Chennai, Tamilnadu

600119, India^1

关键词: Damage properties;    Experimental and numerical analysis;    Experimental investigations;    External convection;    Interior conditions;    Interior temperature;    Thermal condition;    Thermal Performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/197/1/012073/pdf
DOI  :  10.1088/1757-899X/197/1/012073

来源: IOP

【 摘 要 】

Heat flow from the roof with radiation through glass windows obviously high level that contributes to the total heat gained of a vehicle cabin. The cabin temperature of closed stationary vehicles in direct sunlight can quickly rise to a very level that may damage property and harm children or pets left in the vehicle. The problem that is faced by many car users today is very hot interior after certain minutes or hours of parking in open or un-shaded parking area. The heat accumulated inside the vehicle with undesired temperature rise would cause the parts of the car's interior to degrade. Even the passengers are affected with the thermal condition inside the vehicle itself. The passenger has to wait for a certain time before getting into the car to cool down the interior condition either by lowering down the window or switching on the air conditioner at high speed that really affect the fuel consumption. A new roofing structure to improve its total thermal resistance is developed. Its uses phase change material properties to trap the heat from solar radiation and then release it back to the outer atmosphere by external convection when the vehicle is in use or during the nocturnal cycle. Phase change material, which has become an attractive means to store. Thermal energy, which has a wide range of applications, has been used. Phase change material has a high heat of fusion which is able to store and release large amount of energy. This PCM has been insulated in the roof of the vehicle to arrest the heat entering into the vehicle cabin. Experimental and numerical analyses have been conducted to compare the thermal performance of the new roofing structure and the normal roofing. By this experiment, the cooling process of the cabin could be much lower. The experimental investigation revealed that, on a hot day, the interior temperature of the vehicles cabin was approximately 22°Ce higher than the ambient temperature. The results show that the new roofing structure could effectively reduce the inlet of heat from the roof into the cabin. As a result, the interior temperature of the cabin could be much lower.