glaze

Slide 1: 

Al Kiyadi Presentation of: Economy Comparing in Glaze System Done by: Mohammed Ali Al-Kiyadi King Faisal University College of Architecture and Planning Department of Building Science & Technology Graduate Program First Semester 1427 H / 2006 –S

Objective : 

Al Kiyadi Objective This paper presents a dynamic thermal study to show estimated energy cost for four different building constructed by: 1- Single Clear Claze. 2- Clear Double Pane Low-E Glaze. 3-Tinted Double Pane Low-E Glaze. 4-Double Glazing Façade (Low-E)

Slide 3: 

Al Kiyadi Introduction Adding an additional pane of glass to a window creates a trapped air space. Double-paned windows usually have U-values of 0.55 or lower. The Low-E coating is usually placed on the surface of one of the panes adjacent to the trapped air space. The Double Skin Façade is a system consisting of two glass skins placed in such a way that air flows in the intermediate cavity.

Slide 4: 

Al Kiyadi Low Emissivity glass concept keep heat outside during summer and inside during winter A virtually invisible coating made from a semi-conductor or metal The Low-E coating is usually placed on the surface of one of the panes adjacent to the trapped air space. This Low-E coating serves to absorb and reflect radiant heat and ultraviolet rays.

Advantages of Low-E Windows : 

Al Kiyadi Advantages of Low-E Windows Reduced fading of carpets, drapes and furniture Reduced mildew and deterioration of the window frame Increased comfort near windows Lower energy bills for years to come

Slide 6: 

Al Kiyadi Double Glaze Facade concept The Double Skin Façade is a system consisting of two glass skins placed in such a way that air flows in the intermediate cavity. Double-skin façades work as deflection systems, which make better use of natural light. Also, they could reduce light, heating, cooling loads and air change consumption which reduce the energy consumption

Slide 7: 

Al Kiyadi Advantages of Double glaze Acoustic insulation Reduced internal noise Thermal insulation Night time ventilation Energy savings and reduced educed environmental impacts Natural ventilation Thermal comfort

Slide 8: 

Al Kiyadi Higher construction costs Reduction of r rentable office space Additional maintenance and operational costs Overheating problems Increased air flow velocity  inside the cavity Increased construction weight the rooms. Disadvantages of Double glaze

Slide 9: 

Al Kiyadi Building Modeling (Heed Software)

Modeling Orientation : 

Al Kiyadi Modeling Orientation

Windows Surface Area : 

Al Kiyadi Windows Surface Area

Light Control : 

Al Kiyadi Light Control

Internal Loads : 

Al Kiyadi Internal Loads

Heating and cooling : 

Al Kiyadi Heating and cooling

Case #1 : 

Al Kiyadi Case #1

Construction Cost of Case # 1 : 

Al Kiyadi Construction Cost of Case # 1 Cost of Building Construction Building= 1,273,140. Cost of the glass construction= (80+40)x3000= 360,000 Total Construction Cost= 1,633,140

Electric Charge : 

Al Kiyadi Electric Charge

Case #2 : 

Al Kiyadi Case #2

Construction Cost of Case # 2 : 

Al Kiyadi Construction Cost of Case # 2 Cost of Building Construction Building= 1,273,140. Cost of the glass construction= (240+40)x3000= 840000 Total Construction Cost= 2,113,140

Electric Charge : 

Al Kiyadi Electric Charge

Payback Period Case #2 (compared with Case #1) : 

Al Kiyadi Payback Period Case #2 (compared with Case #1) Given: Initial cost P(x) = 2,113,140 S.R. Diff. of Case #1 = 480,050 S.R. Annual Cost (Electric) = 26607.075 S.R. Annual net Benefit = 39,465.975 – 26607.75 = 12,858.9 Payback Period = Initial cost/ Annual net Benefit = 480,050/12,858.9= 17.3 year

Case #3 : 

Al Kiyadi Case #3

Construction Cost of Case # 3 : 

Al Kiyadi Construction Cost of Case # 3 Cost of Building Construction Building= 1,273,140. Cost of the glass construction= (260+40)x3000= 900,000 Total Construction Cost= 2,173,140

Electric Charge : 

Al Kiyadi Electric Charge

Payback Period Case #2 (compared with Case #1) : 

Al Kiyadi Payback Period Case #2 (compared with Case #1) Given: Initial cost P(x) = 2,218,140 S.R. Diff. of Case #1 = 585,000 S.R Annual Cost (Electric) = 14,060.575 S.R. Annual net Benefit = 39,465.975 – 19,606.578 = 20,405.382 Payback Period = Initial cost/ Annual net Benefit = 540,000/ 20,405.382 = 26.45 year