Numerical heat transfer analysis and development of a heat removal system for an unshaded parked car in sunny day: compu
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Numerical heat transfer analysis and development of a heat removal system for an unshaded parked car in sunny day: computational fluid dynamics study Vishal Shankar Rath1 · S. Senthilkumar2 · Dewanshu Deep2 Received: 25 January 2020 / Accepted: 3 September 2020 © Akadémiai Kiadó, Budapest, Hungary 2020
Abstract Increase in air temperature inside a parked car cabin causes negative impacts such as low thermal comfort, health risk for the passengers/pets inside the cabin, increased fuel consumption due to higher air-conditioning requirements. The present project focuses on methods to reduce the cabin temperatures for a car parked in unshaded condition. CFD analyses along with experimental validation have been performed with the use of different proposed cabin temperature control methods such as use of electrochromic tint on windshield, use of inlet and outlet vents, lowering of windows and combinations of these. Commercial CFD package ANSYS Fluent has been utilized to develop a numerical model for car cabin temperature distribution assessment when a parked car is subjected to solar load at different locations inside the cabin such as dashboard, seats and boot. A solar surface to surface radiation model is used in conjunction with solar calculator to capture the solar radiation that included change in position of the sun. A 5:1 scale down model of car cabin has been used for experimental validation with the help of help of PT-100 resistance thermometers. Good reduction in cabin temperatures has been observed for all the proposed cooling methods with 14 °C reduction for the combined tint, vents and lowered windows case. Keywords Car cabin · Solar load · Heat removal system · Tint · Vents · Numerical
Introduction Regulation of the cabin temperature in automobiles is a major factor in determining the overall comfort of a passenger. The air-conditioning systems presently in use are not very efficient and add a significant load on the vehicle power source. The temperature inside the vehicle cabin will be higher than the outside environment temperature in parked conditions due to solar radiative effects. The increased air temperatures inside car cabins, especially when parked under intense solar radiation, poses several threats such as: health risk for the passengers and low thermal comfort, * S. Senthilkumar [email protected] 1
Department of Automobile Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Chennai, Tamil Nadu 600062, India
Department of Aerospace Engineering, SRM Institute of Science and Technology, Kattankulathur, Kanchipuram, Chennai, Tamil Nadu 603203, India
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impact on the quality and durability of cabin materials like plastics, foams or artificial leather, rubber, synthetic fibre, etc., and increased fuel consumption. [1] Booth et al. [2] have carried out a study on the circumstances of child fatalities due to children left in parked cars, known as Motor vehicle-related child hyperthermia fatalities (MVRCHF). Two hundred and thirty one fatalities in
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