Studies of air-flow and temperature fields inside a passenger compartment for improving thermal comfort and saving energy. Part I: Test/numerical model and validation

Zhang, Huajun; Dai, Lan; Xu, Guoquan; Li, Yong; Chen, Wei; Tao, Wen‐Quan

doi:10.1016/j.applthermaleng.2008.10.005

Cited by 86 publications

(33 citation statements)

References 11 publications

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“…They proposed computational and empirical models for forecasting thermal comfort in the non-uniform transient environment of the passenger car. Studies of air-flow and temperature fields inside a passenger compartment for improving thermal comfort and saving energy was investigated by Zhang et al [6]. They investigated the influence of different factors on thermal comfort and energy consumption.…”

Section: Effect Of Dynamic Vents On the Thermal Comfort Of A Passengementioning

confidence: 99%

Effect of Dynamic Vents on the Thermal Comfort of a Passenger Car

Singh

Raut

Biswas

et al. 2015

SV-JME

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• CFD model is validated against experimentally measured data during the daytime.• Uniform temperature distribution during the when cooling is initiated is observed for a particular vent angle.• For the first 3 to 4 minutes the car air-conditioner should be operated at a high flow setting using the dynamic vents.• Results can be utilized to save energy without any changes in the air-conditioning unit.

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Section: Effect Of Dynamic Vents On the Thermal Comfort Of A Passengementioning

confidence: 99%

Effect of Dynamic Vents on the Thermal Comfort of a Passenger Car

Singh

Raut

Biswas

et al. 2015

SV-JME

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“…To investigate the heating performance, vehicle is driven along a pre-determined path in the lowest operating temperatures in field to simulate the extreme-low outer temperatures. Temperature inside the cabin is measured in four main areas: the cabin sensor at the middle of the cabin, the head and the knee as well as the foot of the passenger [6]. During this experiment, winter test preparations are completed before the test.…”

Section: Experimental Studymentioning

confidence: 99%

“…The paper ensures an overview of local microclimate parameters which HVAC system should achieve in a vehicle cabin in warm ambient, regarding thermal sensitivity of individual parts of human body obtained from empirical data. Zhang et al [6] used the CFD method to simulate three-dimensional temperature distributions and flow field in a car compartment with and without passengers. They validated their numerical model by comparing its results against the experimental data.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigations of Heating in a Bus Cabin Under Transient State Conditions

Ekici¹,

Güney²

2017

Computational Methods and Experimental Measurements XVIII

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This study carries out an experimental and numerical work in order to investigate the air flow and temperature fields inside a coach bus cabin. In addition to a real-world experiment, an existing bus heating system has been investigated computationally using a three-dimensional model consisting of one seating row with periodical and symmetrical boundary conditions (BCs) as required. The seats, without including passengers as has been the case in the experiments, are created with adiabatic BCs. The developed computational fluid dynamics (CFD) model is used in a transient analysis of heating by employing the "Boussinesq Approximation" for buoyancy-induced effects and incorporating the experimentally obtained BCs into the system. The model validation is performed by comparing model results against experimentally obtained ones for three regions, corresponding to head, knee, and foot level of passengers. The difference between the measured and the calculated temperatures is found to be less than around 3°C for the head and foot level, while it is 5°C for the knee level of the passenger for the transient heating simulation.

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“…Finally, for external correlations around the vehicle (car, bus or train), several authors (Fujita et al, 2001;Kataoka and Nakamura, 2001;Li and Sun, 2013;Mezrhab and Bouzidi, 2006;Zhang et al, 2009) use their own specific correlation in the general form of eq. (10) (with a, b and c constants).…”

Section: Convection Sub-modelmentioning

confidence: 99%

Cabin Thermal Needs: Modeling and Assumption Analysis

Brèque¹,

Nemer²

2017

Linköping Electronic Conference Proceedings

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Interest for cabin thermal needs has strongly increased for the past 10 years, particularly due to heating. Indeed, the development of electric and hybrid vehicles stressed the need to rethink the cabin thermal design and the HVAC, this high-consuming auxiliary, which can dramatically decrease the vehicle electric range. Thus, this paper presents a detailed transient and mono-zonal model of a car cabin in order to predict the thermal needs. The model is developed using the MODELICA language via the DYMOLA environment. It considers conduction, convection, radiation heat transfers as well as the HVAC and water vapor impacts. The different assumptions of the model are discussed and important considerations usually not discussed are highlighted. The thermal loads are also analyzed. Finally, the heating and cooling thermal needs are computed for steady state mode and for convergence mode as well as for varying recirculation ratios. This work is useful to better understand the whys and wherefores related to the cabin thermal needs.

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Studies of air-flow and temperature fields inside a passenger compartment for improving thermal comfort and saving energy. Part I: Test/numerical model and validation

Cited by 86 publications

References 11 publications

Effect of Dynamic Vents on the Thermal Comfort of a Passenger Car

Effect of Dynamic Vents on the Thermal Comfort of a Passenger Car

Experimental and Numerical Investigations of Heating in a Bus Cabin Under Transient State Conditions

Cabin Thermal Needs: Modeling and Assumption Analysis

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