Modelling of Car Cabin Thermal Behaviour during Cool Down, Using an Advanced CFD/Thermal Approach

Piovano, Andrea Alessandro; Lorefice, L.; Scantamburlo, Giuseppe

doi:10.4271/2016-01-0213

Cited by 13 publications

(7 citation statements)

References 4 publications

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“…Although less computational demanding compared to the 3D CFD approach, the main drawback of the 1D modelling is the considerable number of assumptions and simplifications that need to be made. On the other hand, the 3D CFD [170,171] modelling accounts for complex flow structures and the interaction of detailed pressure, temperature and velocity fields. The 1D modelling can be set up to run in real-time, or even faster than real-time, whereas in the case of 3D CFD, the models tend to run many times slower than real-time.…”

Section: Thermal Fluids Modellingmentioning

confidence: 99%

Modelling and Co-simulation of hybrid vehicles: A thermal management perspective

Yuan

Fletcher

Ahmedov

et al. 2020

Applied Thermal Engineering

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Section: Thermal Fluids Modellingmentioning

confidence: 99%

Modelling and Co-simulation of hybrid vehicles: A thermal management perspective

Yuan

Fletcher

Ahmedov

et al. 2020

Applied Thermal Engineering

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“…They observed that the incident solar radiation through glass inside passenger cabin is higher which leads to increase in temperature of passenger cabin. Piovano, A. et al [6] developed an advanced methodology to predict the cabin cool-down test of car. They tried to catch the correct heat transfer between the outside environment and the internal cabin with a thermal tool, together with an internal flows CFD simulation by focusing the attention on the fluid dynamics and thermo dynamics aspects of the cool-down physics.…”

Section: Literature Surveymentioning

confidence: 99%

“…These simulations can take a huge amount of computational resources and time, and requires exact geometrical data of vehicle exterior which is not available in early stages of vehicle design. [6] This simulation method, tested in environments characterized by non-uniform and variable temperature conditions on road test or static test, is not valid for HVAC cool-down performance validation as per industry standards. Some researchers performed steady state simulation which cannot represent actual case.…”

Section: Literature Surveymentioning

confidence: 99%

Prediction of HAVC Cool-Down Performance inside a Minibus Passenger Cabin Using CFD and Its Experimental Validation.

Mhetre¹,

Sathyanarayan²,

Diwan³

et al. 2019

SMSJ

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Now with more time spent by people while travelling and increasing mobility, providing passengers with a thermally comfortable experience are one of the important targets of any bus manufacturer. Conversely, comprehensive assessment through Climatic Wind Tunnel testing is costly and not possible during early stages of vehicle design. The aim of this work has been to develop a simplified simulation methodology to model the Minibus passenger cabin for cool down test. This study presents a methodology for predicting Heating, Ventilation and Air Conditioning (HVAC) cool-down performance inside Minibus cabin using Computational Fluid Dynamics (CFD) simulation to revise the HVAC duct design and parametric optimization in order to ensure thermal comfort of occupant. Heat Load is calculated analytically and has been considered in the CFD model and occupant heat load is considered as per ASHRAE standard. CFD simulation predicted the temperature and velocity distribution inside passenger cabin. Simulated cool-down results were found to be in good agreement with the experimental results. CFD cool-down prediction is useful in order to reduce time and costs related to climatic wind tunnel and road tests. Validated CFD model is used to study the effect of air flow on cool-down performance.

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“…Refrigerant and airflow rates are, in turn, determined by vehicle velocity and compressor speed. In any system optimization, it is essential to perform a comprehensive search of the variable design space to locate the optimum solution (Piovano et al 2016). The performance of the concerned product can be empowered faster by inducing a power packed computational fluid dynamics (CFD) tool named ANSYS Fluent software respectively.…”

Section: Selected Papers From International Conference On Newer Technmentioning

confidence: 99%

An Investigation of Air Flow and Thermal Comfort of Modified Conventional Car Cabin Using Computerized Fluid Dynamics

2018

JAFM

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Air conditioning is widely used in many areas to reduce the heat and humidity of the work place and to maintain a room temperature for thermal stability and physical ability to perform various tasks. Computational Fluid Dynamics (CFD) is based on the numerical solutions of the fundamental governing equations of fluid dynamics namely the continuity, momentum and energy equations. Computerized fluent mechanics is one of the increasing paradigm in the air flow simulation in vehicle designs. The design optimization of vehicle can offer better efficiency in cabin surface as well as aerodynamic. In vehicles, air conditioning tends to offer efficient thermal conditioning and air circulation inside the cabin for passenger comfort from different climate variation. Almost all the automobiles available in the market are fitted with airconditioning systems. The manufacturers focus clearly on the AC system for a wide variety of climates. As technology advances, AC system is also adhering major advancements. In general, automobile airconditioning systems are designed to provide comfort for the driver and the passengers during a journey. The conventional electrical-driven compression systems are widely used in almost all of the automobiles today. An air-conditioner is operated to make a hot and humid passenger compartment a more comfortable environment. However, with the improvement in vehicle fuel economy, the allowable power consumption for the air-conditioner has been decreasing, in relation to the overall power consumption of the vehicle. The internal temperature-humidity conditions are an essential factor for the comfort and health of passengers, and also for the safety of drivers. In this research, the air conditioning inside vehicle cabin is analyzed. The objective of the research is to develop an air depression design inside the top surfaces of the rear cabin. The optimal flow of air inside cabin increases the thermal comfort of the vehicle. The proposed cabin depression design inside the rear top surfaces are analyzed under thermal variation and airflow circulation inside the cabin. The Ansys fluent tool is utilized in this paper to evaluate the variation of air flow and the temperature inside the passenger vehicle cabin respectively. From the research analysis, the proposed evaluation of the depression design is more optimal for air conditioning in budgetary small passenger vehicles.

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Modelling of Car Cabin Thermal Behaviour during Cool Down, Using an Advanced CFD/Thermal Approach

Cited by 13 publications

References 4 publications

Modelling and Co-simulation of hybrid vehicles: A thermal management perspective

Modelling and Co-simulation of hybrid vehicles: A thermal management perspective

Prediction of HAVC Cool-Down Performance inside a Minibus Passenger Cabin Using CFD and Its Experimental Validation.

An Investigation of Air Flow and Thermal Comfort of Modified Conventional Car Cabin Using Computerized Fluid Dynamics

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