Numerical Simulation of Cabin Truck Thermal Comfort

2002 ◽  
Author(s):  
C. R. Siqueira ◽  
M. Jokuszies ◽  
M. R. Lima ◽  
P. Vatavuk
Keyword(s):  
Numerical Simulation ◽  
Thermal Comfort

Numerical Simulation of Thermal Comfort Performance in a Room with Different Insulating Materials Using Computational Fluid Dynamics

2015 ◽  
Vol 650 ◽  
pp. 29-37
Author(s):  
A. Aravind Kumar ◽  
B. Nagesh Babu ◽  
S. Somya
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Computational Fluid Dynamics ◽  
Thermal Comfort ◽  
Ambient Air ◽  
Expanded Polystyrene ◽  
Temperature Cycle ◽  
Fine Grid ◽  
Insulating Materials ◽  
Thermal Insulating

Numerical simulation studies are carried out for improvement of energy efficiency in a room by with different thermal insulating materials using computational fluid dynamics (CFD). The study considered various building insulating materials (BIM’s) such as: (a) Expanded Polystyrene (EPS) (b) Fiber Glass (Resin bonded (RB)-Glass wool) (c) Polyurethane Foam (PUF) and (d) Cement Plaster (CP) along with composite bricklayer combination. A multi-physical 3D model room of size 2.6 m × 2.6 m × 2.6 m is created to analyze the performance of different insulating materials using CFD simulations. The experimental data of 24 hr temperature cycle of the ambient air is used for the analysis of performance of thermal comfort inside the room with the incorporation of different thickness of the insulating materials. The thickness of insulation 0.03, 0.1, 0.2 and 0.3 m is applied on interior side of walls and roof of the building. The study performed with different grid sensitiveness for coarse, medium and fine meshes for the improvement in the accuracy of the results. The fine grid mesh analysis is chosen to carry the further studies to compare the insulated and non-insulated condition for the thermal behavior inside the room. The result shows that the thermal conductivity and heat capacity of insulated walls are very important to be taken into account for carrying out detailed thermal analysis of buildings. The studies are carried out using commercial CFD tool of ANSYS CFX 15.0. The results of comparison shows that it is possible to maintain needed thermal comfort conditions in the room while reducing the total energy consumptions at the same time by appropriate use of BIM’s.

Research on the Effect of Natural Ventilation on Buses in Summer Based on CFD Numerical Simulation Method

2011 ◽  
Vol 361-363 ◽  
pp. 1056-1060 ◽  
Author(s):  
Bao Lin ◽  
Xue Ting Wang ◽  
Xiao Hu
Keyword(s):  
Numerical Simulation ◽  
Thermal Comfort ◽  
Natural Ventilation ◽  
Thermal Environment ◽  
Air Flow ◽  
Cost Effective ◽  
Simulation Method ◽  
Computational Domain ◽  
Cfd Numerical Simulation ◽  
Different Parts

Because of the relatively narrow space and high density distribution of the passengers, the bus interior environment deteriorates in summer. Natural ventilating introduces a fresh natural freeze, provides the bus interior with appropriate distribution of air supply temperature and velocity field. Making good use of natural ventilation is an operating strategy ideal for improving passengers’ satisfaction, which is considered as an environmental friendly and cost effective approach. Based on CFD numerical simulation, with a whole-domain approach, this paper predicts air flow and thermal comfort in naturally ventilated bus. The outside and inside airflow is modelled simultaneously and within the same computational domain. The thermal environment in different parts of the bus interior is compared. Different vehicle velocities and conditions of windows are taken into account, analysis are made regarding to the effect of both of them on the interior thermal comfort. The result shows, air disturbance at the bus rear parts are intenser than the other parts with better thermal satisfaction; the quality of air flow in different parts makes the temperature difference in bus achieve as high as 3°C; the use of roof openings distributes the temperature more evenly.

scholarly journals A predictive model of thermal conductivity of plain woven fabrics

2017 ◽  
Vol 21 (4) ◽  
pp. 1627-1632 ◽  
Author(s):  
Jia-Jia Wu ◽  
Hong Tang ◽  
Yu-Xuan Wu
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Numerical Simulation ◽  
Heat Flux ◽  
Thermal Comfort ◽  
Cell Model ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Unit Cell Model ◽  
Fabric Structure

This paper proposes an effective method to predict the thermal conductivity of plain woven blended fabric to optimize woven fabric structure, and to evaluate thermal comfort. The unit cell model of fabric is established for numerical simulation of heat transfer through thickness. The thermal conductivity of blended yarns is calculated by a series model. The temperature and heat flux distributions are verified experimentally.

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