Numerical Simulation of the Thermal Performance of Solarwall

2011 ◽  
Author(s):  
Gao Lixin ◽  
Fang Xiumu
Keyword(s):  
Numerical Simulation ◽  
Thermal Performance

Numerical Simulation of the Thermal Performance of a Nanofluid-Filled Heat Pipe

2015 ◽  
Vol 37 (2) ◽  
pp. 220-231 ◽  
Author(s):  
Mohammad Hasan Shojaeefard ◽  
Javad Zare ◽  
Mojtaba Tahani
Keyword(s):  
Numerical Simulation ◽  
Heat Pipe ◽  
Thermal Performance

scholarly journals Influence of the Coating System on the Acoustic, Thermal and Luminous Performance of Brazilian Buildings

Designs ◽  
2020 ◽  
Vol 4 (3) ◽  
pp. 34
Author(s):  
Pedro F. Gois ◽  
Ângelo J. Costa e Silva ◽  
João M. P. Q. Delgado ◽  
António C. Azevedo ◽  
Ana S. Guimarães ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Numerical Simulations ◽  
Thermal Performance ◽  
Reference Model ◽  
Coating System ◽  
Structural Element ◽  
Acoustic Performance ◽  
Extensive Numerical Simulation ◽  
Coating Layers ◽  
Floor System

This work presents an extensive numerical simulation to analyze the influence of the coating layers on the performance of construction systems, in order to make the constructions projects feasible, not only economically but also technically. Through numerical simulations based on a defined reference model, the present work studied the influence of different layers of floor, roof and internal and external wall systems, on the acoustic, thermal, and luminous performance of buildings in Brazil. The results showed the materials and elements with the greatest influence on: lighting performance are the internal finishes of the environment and the type of glass used in the external windows. On thermal performance, all elements of the roofing system and façades, especially an absence of external cladding and the use of thermal blankets on the roof, have greater influence. The acoustic performance of the façade function on the external windows and acoustic performance of the floor system are mainly influenced by the thickness of the structural element and the use of a ceiling and acoustic blanket; acoustic performance of internal walls is affected by typology of the structured element of the wall and thickness.

scholarly journals Use of experimental and numerical simulation methods for rational design of the air cooling apparatus for lubrication systems of compressors

2020 ◽  
Vol 65 (2) ◽  
pp. 215-223
Author(s):  
M. V. Gureev ◽  
I. I. Khabibullin ◽  
A. N. Skrypnik ◽  
G. S. Marshalova ◽  
I. A. Popov ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Heat Exchange ◽  
Thermal Performance ◽  
Rational Design ◽  
Computational Time ◽  
Computational Techniques ◽  
Air Cooling ◽  
Simulation Methods ◽  
Oil Cooler ◽  
Numerical Simulation Methods

The objective of the present work was to study heat and hydraulic parameters of an air cooling apparatus of oil (ACAO), whose geometry of its flow-through part is changed to decrease hydraulic losses in its air conduit and to increase the cooling efficiency of oil. Using numerical simulation methods of heat transfer, we have developed and tested the computational techniques applied in a wide class of heat exchange apparatuses, including those consisting of the sections of finned flat tubes manufactured by extrusion with subsequent deforming cutting. We have proposed to make a finned part of a heat-exchange surface in the form of porous inserts. This has allowed us to reduce numerical simulation equipment requirements and to decrease computational time. Predicted results well agree with experimental data; their analysis shows that the calculated value of thermal performance of the oil cooler due to the revealed construction drawbacks of the air conduit is by 19 % less than that of the designed one. Based on the results of the numerical simulation studies, a number of recommendations have been made how to improve the layout inside the air cooling apparatus for oil in order to enhance its thermal performance and aerodynamic quality. In particular, we have proposed to mount new fan blades to enhance its performance; to change the construction of the air outlet valve by taking away a baffle that partially overshadows the exit area of the bottom fan; to modify the shape of the bottom collector of the oil cooler in order to make a uniform velocity profile at the entrance of cooling sections. Connecting in series heat exchange sections may be a perspective engineering decision. The outcomes of all proposed engineering decisions can be assessed by numerical simulation methods that will allow us not to design expensive equipment.

scholarly journals Premium jet cooling with two ribs over flat plate utilizing nanofluid mixed convection

2017 ◽  
Vol 21 (2) ◽  
pp. 963-976 ◽  
Author(s):  
Wael El-Maghlany ◽  
Mohamed Teamah ◽  
A.E. Kabeel ◽  
Ahmed Hanafy
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Mixed Convection ◽  
Flat Plate ◽  
Heat Transfer Rate ◽  
Thermal Performance ◽  
Transfer Rate ◽  
Richardson Number ◽  
Volume Fraction ◽  
Solid Volume Fraction

In this study, a numerical simulation of the thermal performance of two ribs mounted over a horizontal flat plate and cooled by Cu-water nanofluid is performed. The plate is heated and maintained at a constant temperature and cooled by mixed convection of laminar flow at a relatively low temperature. The top wall is considered as an adiabatic condition. The effects of related parameters such as Richardson number (0.01 ? Ri ? 10), the solid volume fraction (0.01 ? ? ? 0.06), the distance ratio between the two ribs (d/W = 5, 10, and 15), and the rib height ratio (b/W = 1, 2, and 3) on the ribs thermal performance are studied. The numerical simulation results indicate that the heat transfer rate is significantly affected by the distance and the rib height. The heat transfer rate is improved by increasing the nanoparticles volume fraction. The influence of the solid volume fraction with the increase of heat transfer is more noticeable for lower values of the Richardson number. The numerical results are summarized in the effect of pertinent parameters on the average Nusselt number with the assistance of both streamlines and isothermal ones. Throughout the study, the Grashof and Prandtl numbers, for pure water are kept constant at 103 and 6.2, respectively. The numerical work was displayed out using, an in-house computational fluid dynamic code written in FORTRAN, which discretizes non-dimensional forms of the governing equations using the finite volume method and solves the resulting system of equations using Gauss-Seidal method utilizing a tri diagonal matrix algorithm.

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