Investigations for the Thermal Influence of Glass Patterns on the Building Envelope

Advances in Mechanical Engineering

Hao-Hu

Chen³

et al. 2015

Self Cite

Excessive solar energy can significantly increase interior temperatures and yield great energy demands for air conditioning. Whereas reducing energy consumptions is very crucial today, this article employs patterned glass technology which incorporates linear patterns throughout the exterior surface of glass to attenuate the solar effect on the interior thermal field based on theoretical and experimental studies. By periodically imposing linearly three-dimensional patterns over the outer surface of window glass, the analytical results indicate that the interior solar heat is able to be reduced, as the surface patterns increase the incident angle and/or decrease the solar energy loading on the patterned glass material. Moreover, the interior solar heat can be strongly affected by the pattern design. According to thermally measured results, the trapezoidal patterned glass having 3-mm-top-edged patterned members yields lower temperature on the interior surface of glass comparing with that for the trapezoidal patterns having 6-mm-top edges. Therefore, making the least non-sloped feature or flat plane appearing on the patterned glass helps decrease the interior temperature resulting from solar energy.

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reducing interior temperature resulting from solar energy using three-dimensional surface patterns

Advances in Mechanical Engineering

Hao-Hu

Chen³

et al. 2015

Self Cite

“…It supports the modeling results provided by Lin et al's work. 2 According to the incident angles expressed in Tables 1 and 2, one can find that the roof linearly patterned glass over the left-and right-edged areas of the surface pattern are loaded by solar radiation as long as u 1 is in the ranges of 0 and p 2 u pb and u pb and p, respectively, instead of 0 and p for the traditional flat glass. Moreover, while the incident angle of the patterned glass on the left edge of surface pattern can be smaller than that of the traditional flat glass during solar orientation u 1 coincident with the direction between 0 and p/2 2 u pb , the incident angle of the linearly patterned glass on the left edge of surface pattern is greater than that of the traditional flat glass as the solar radiation varying from u 1 .…”

Section: Theoretical Incident Angles For Roof Linearly Patterned and Traditional Flat Glassmentioning

confidence: 98%

“…The linearly patterned glass with various patterned shape, patterned spacing, and patterned angle is not involved in Lin et al's study. Numerical analysis related to linearly patterned glass was provided by Lin et al 2 Lin et al utilized computational fluid dynamics (CFD) technique to evaluate the thermal performance of the roof linearly patterned glass under solar radiation at noon. Based on Lin et al's analytical results, as the linearly patterned glass is applied on the roof and vertically solar loaded, the interior thermal energy due to solar radiation can be reduced.…”

Section: Introductionmentioning

confidence: 99%

Attenuation of glazing energy using linear patterns on the glass surface

Advances in Mechanical Engineering

Chen²,

Hao-Hu

et al. 2015

Self Cite

Glazing energy resulting from solar radiation can be the main source to vary the thermal field inside of a building. As the glass material is loaded by intensive solar radiation, the glazing energy, greatly induced, will result in the drastic increase in interior temperatures and yield the energy demand for air conditioning loads. Reducing energy consumption is imperative; therefore, this article presents the patterned glass technology which incorporates linearly and uniaxially symmetric patterns throughout the exterior surface of glass to attenuate the solar energy entering indoors. By imposing the patterns over the glass surface, the glazing energy can be reduced due to the increase in the incident angle and the decrease in the solar energy loading on the glass. The thermal performance of the linearly patterned glass is evaluated by computational fluid dynamics technique. Based on computational fluid dynamics-evaluated results, as the patterned glass is applied on the window opening, the interior solar heat is able to be decreased. Moreover, the glazing energy can be strongly associated with the pattern design. Increasing the patterned angle and decreasing the patterned space help reduce solar effect on the interior temperatures.

“…Air conditioning with the high energy-consuming is the main way to adjust the indoor environment. Owing to energy efficiency and zone temperature control, variable air volume (VAV) air condition system has been widely used [1,2]. To achieve energy-saving, adjustable system and ensure safe maintain of the VAV system, some groups have carried out a few studies on the VAV system control including fresh air regulating, supply air temperature optimization, energy analysis, zone temperature control and so on [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

An Investigation and Analysis on Indoor Environment of Typical Office with Self-Regulation Inlets VAV System

et al. 2014

AMR

Indoor environment of VAV system was paid more increasing attention, besides the energy saving, zone temperature control of VAV system. In this paper, using in-site testing and analysis, some experiments were conducted on indoor environment of the typical office with self-regulating inlet VAV system. The results showed the temperature and relative humidity of the selected office were in the range of 22.8 °C~24.5°C and 27.0%~35.0%, respectively. The maximum volume of total supply airflow is 816 m3/h, while the minimum one is 557 m3/h. The concentration of carbon dioxide ranged from 0.0596% to 0.0873% (v/v). The calculated maximum value of temperature uniformity coefficient was 0.026 that indicated the distribution of indoor air is uniformity. So this VAV system used in the office building provided a good indoor environment to meet the satisfaction of the office staff.