An Optimal Window Position in External Walls, of Different Materials and Construction Designs, in Relation to Critical Surface Temperature

2016 ◽  
Vol 820 ◽  
pp. 230-235
Author(s):  
Boris Vavrovič ◽  
Rastislav Menďan
Keyword(s):  
Surface Temperature ◽  
Contact Area ◽  
Critical Surface ◽  
External Wall ◽  
Article Analysis ◽  
Window Position ◽  
Optimal Window

In article analysis of optimal window position in external wall of different properties is provided, considering the highest surface temperature in contact area of window and its reveal.

Optimal Localisation of Window in External Wall of Different Material and Construction Design Considering Linear Loss Coefficient

2016 ◽  
Vol 820 ◽  
pp. 177-182
Author(s):  
Rastislav Menďan ◽  
Boris Vavrovič
Keyword(s):  
Loss Coefficient ◽  
External Wall ◽  
Construction Design ◽  
Window Position ◽  
Linear Loss ◽  
Optimal Window

The goal of the article is contribution to the topics analysing the optimal window position in external wall in order to get minimal value of linear loss coefficient.

scholarly journals Thermal Behavior and Measures to Prevent Condensation of a Newly Developed External Wall Panel

2019 ◽  
Vol 11 (3) ◽  
pp. 912 ◽  
Author(s):  
Goopyo Hong ◽  
Suk-Won Lee ◽  
Ji-Yeon Kang ◽  
Hyung-Geun Kim
Keyword(s):  
Surface Temperature ◽  
Thermal Performance ◽  
Simulation Analysis ◽  
Thermal Characteristics ◽  
Weather Conditions ◽  
Building Envelope ◽  
Unsteady State ◽  
Wall Panel ◽  
External Wall ◽  
Thermal Transmittance

An external wall panel (EWP) as a novel alternative to provide spatial flexibility and improve the performance of external walls was developed. The purpose of this study was to analyze the thermal performance of this EWP. A simulation analysis was carried out to scrutinize whether it was vulnerable to condensation, considering South Korea’s weather conditions, and find countermeasures to prevent this. Results indicated that the indoor surface temperature with the measures of added insulation materials and an inserted thermal-breaker was over 16.5 °C and that these methods could prevent condensation. In addition, this study assessed unsteady-state thermal characteristics, linear thermal transmittance, and the effective thermal transmittance of EWP. Effective thermal transmittance was estimated in consideration of the heat transmittance of EWP and the linear thermal transmittance of its slabs and its connection parts. The thermal characteristics of the building envelope are needed to analyze effective thermal transmittance and linear thermal transmittance-associated thermal bridges.

Plane-Contact Problem of Thermoelasticity During Quasi-Stationary Heat Generation on the Contact Surfaces

1965 ◽  
Vol 87 (4) ◽  
pp. 811-817 ◽  
Author(s):  
M. V. Korovchinski
Keyword(s):  
Contact Problem ◽  
Surface Temperature ◽  
Heat Generation ◽  
Contact Area ◽  
Singular Equation ◽  
Stationary Heat ◽  
Plane Contact ◽  
Heat Expansion ◽  
Contact Surfaces ◽  
Maximum Temperatures

When determining the surface temperature on the contact of two rubbing bodies employing the widely used method offered by Block, it is assumed that the distribution of pressure in the contact area remains similar to the distribution when the heat generation caused by friction is absent. But actually, if there is even a slightly noticeable heat generation on the surfaces of the contact, a local bulging appears near the contact area owing to the heat expansion of the rubbing bodies. This bulging changes the curve and consequently the law of distribution of pressure as compared to that of Hertz. The latter in its turn leads to alteration of maximum temperatures as compared to the universally adopted values. This paper deals with the composition and then with the solution of the basic integral-differential singular equation for distribution of pressures across the contact strip for the case of two contacting cylinders with parallel axes; the distribution of surface temperature is then found.

Numerical Investigation of the Limiting Sliding Condition of Polyoxymethylene with Various Sliding Geometry

2011 ◽  
Vol 222 ◽  
pp. 247-250
Author(s):  
Youhei Takagi ◽  
Akihiro Sone ◽  
Kensaku Mizoguchi ◽  
Yasunori Okano ◽  
Ryo Okuizumi ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Contact Area ◽  
Wear Test ◽  
Sliding Velocity ◽  
Simulation Code ◽  
Different Shapes ◽  
Simulation Results ◽  
Limiting Velocity ◽  
Exact Temperature ◽  
Peak Value

A numerical simulation code was developed for estimating the surface temperature of POM wear test with different shapes. By using the developed code, the effect of sliding geometry with various contact areas on the surface temperature was numerically investigated. The simulation results show that the limiting sliding velocity depends on contact area and reaches a peak value at a certain geometry. It was also found that the simulation code leads an exact prediction of limiting velocity in the range of small contact area. This is important since the exact temperature measurement is very difficult in this range.

Mathematical Model of the Part Surface Temperature Field

2008 ◽  
Vol 373-374 ◽  
pp. 539-542
Author(s):  
Jian Hua Du ◽  
Gui Min Liu ◽  
Wen Zheng Han
Keyword(s):  
Mathematical Model ◽  
Temperature Field ◽  
Surface Temperature ◽  
Contact Area ◽  
Contact Temperature ◽  
Real Contact Area ◽  
Friction Heat ◽  
Real Contact ◽  
Local Contact ◽  
Friction Plate

Research on the simulation and calculation of the temperature field of friction plate in brake is one of the main references for constructing a frictional material couple. The friction heat generates on the real contact area, so the distribution of the friction heat is asymmetry and localized. In this study, the effects of real contact area on the surface temperature were investigated. Then the mathematical model of the two-dimensional unsteady temperature field of local contact area is presented. The simulation of the model for Cu-based wet friction plate indicates that the local contact has an essential influence on the surface temperature and the maximal contact temperature; the mathematic model of local contact temperature field can be used to predict the critical sliding velocity and allowable rate of energy absorbed.

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