an najah national university building engineering department potential energy glazing...
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An Najah National University Building Engineering Department Potential Energy glazing Technologies For Highly Glazed Buildings in Palestine Prepared by : Fuad Mutasim Baba Murad Ribhi Bsharat Wala' Hasan Omar Supervised by: Dr. Sameh Monna. - PowerPoint PPT PresentationTRANSCRIPT
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An Najah National UniversityBuilding Engineering Department
Potential Energy glazing Technologies
For Highly Glazed Buildings in Palestine
Prepared by: Fuad Mutasim BabaMurad Ribhi Bsharat Wala' Hasan Omar
Supervised by:
Dr. Sameh Monna
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Project ContentWhy did we choose this project ?
What are the types of facade used?
What are the strategies for improving indoor environment in
such buildings ?
What are the effects of each type of facade on Indoor
Environment?
What are the Glass facade Construction and other elements?
What are the effects of each type of facade on the cost?
What is our Future work?
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Why did we choose this project ?
Architects, designers, owner, and consultant tend to use large glazing
area today more than ever before by using Single skin façade.
Without consider the impact of this type of facade on:
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Environmental Impact
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Structural System
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Mechanical and Electrical System
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Project Cost
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Architecture Design
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Project Location
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Location analysis
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Site Plan
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Traditional Facade
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Single Skin Facade
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Double Skin Facade
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ElevationsTraditional Facade
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ElevationsSingle Skin Facade
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ElevationsDouble Skin Facade
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Environmental Analysis
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Environmental Analysis
• Heating and cooling loads • Natural Ventilation• Daylight• Acoustics
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Heating and cooling loads We used Design builder which is a simulation software for thermal analysis which is based on Energy Plus software.
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Heating and cooling loadsTraditional façade
There are two condition in this case * Un-insulated Building with double clear glass.
* Insulated building with Low emissive glass.
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Thermal properties for Un- insulated building
The Heat transfer coefficient
U for wall=1.5 W/m2.K
The layer of wall in Un-insulated building by Design builder Software
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Thermal properties for Un- insulated building
The Heat transfer coefficient
U for wall=2.66 W/m2.K
Double Clear Glass
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Cooling loads for Un- insulated building
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Cooling loads for Un- insulated building
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Cooling loads for Un- insulated building
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Cooling loads for Un- insulated building
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Heating loads for Un- insulated building
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Heating loads for Un- insulated building
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Insulated building (Traditional Façade)with Low emissive glass
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Thermal properties for Insulated building
The Heat transfer coefficient
U for wall=0.49 W/m2.K
The layer of wall in Un-insulated building by Design builder Software
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Thermal properties for Insulated building
The Heat transfer coefficient
U for wall=1.49 W/m2.K
Low emissive glass
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Cooling loads forinsulated building
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Cooling loads forinsulated building
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Heating loads forinsulated building
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Heating loads forinsulated building
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Heating and cooling loadsSingle skin(glass) façade
There are two condition in this case * Double clear glass
* Low emissive glass
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Single skin(glass) façade Double clear glass
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Thermal properties for Single Skin Façade
The Heat transfer coefficient
U for wall=2.66 W/m2.K
Double Clear Glass
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Cooling Load For Single Skin FaçadeDouble Clear Glass
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Cooling Load For Single Skin FaçadeDouble Clear Glass
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Heating Load For Single Skin FaçadeDouble Clear Glass
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Heating Load For Single Skin FaçadeDouble Clear Glass
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Single skin(glass) façade Low Emissive Glass
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Thermal properties for Single skin(glass) façade
The Heat transfer coefficient
U for wall=1.49 W/m2.K
Low emissive glass
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Cooling Load For Single Skin FaçadeLow Emissive Glass
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Cooling Load For Single Skin FaçadeLow Emissive Glass
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Heating Load For Single Skin FaçadeLow Emissive Glass
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Heating Load For Single Skin FaçadeLow Emissive Glass
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Heating and cooling loadsDouble skin(glass) façade
There are four system for double skin façade, Box Window Facade,
Shaft Box Façade,
Multi Storey Façade, and Corridor Façade (With cavity 60 cm)
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Heating and cooling loadsDouble skin(glass) façade
There are two condition in this case * Double clear glass
* Low emissive glass
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Double skin(glass) façade Double Clear Glass
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Thermal properties for Double Skin Façade
The Heat transfer coefficient
U for wall=2.66 W/m2.K
Double Clear Glass in internal facade
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Thermal properties for Double Skin Façade
The Heat transfer coefficient
U for wall=5.77 W/m2.K
Single Clear Glass in external facade
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Cooling Load For Double Skin FaçadeDouble Clear Glass
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Heating Load For Double Skin FaçadeDouble Clear Glass
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Double skin(glass) façade Low Emissive Glass
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Thermal properties for Double skin(glass) façade
The Heat transfer coefficient
U for wall=1.49 W/m2.K
Low emissive glass
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Thermal properties for Single skin(glass) façade
The Heat transfer coefficient
U for wall=5.77 W/m2.K
Low emissive glass in External
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Cooling Load For Double Skin FaçadeLow Emissive Glass
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Heating Load For Double Skin FaçadeLow Emissive Glass
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Natural Ventilation
The target of working double skin facade makes air flow and ventilation through the building.
To achieve that we distribute the vents as:
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Vents distribution To make air flow in the cavity between the double skin façade.
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Vents distribution To make air flow through each floor
Vents in the partition wall in floor
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Natural Ventilation
The target of working double skin facade makes air flow and ventilation through the building.
To achieve that we distribute the vents as:
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Vents distribution To make air flow in the cavity between the double skin façade.
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Vents distribution To make air flow through each floor
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CFDAir flow through building
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CFDAir flow through building
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Air flow makes :
• Natural ventilation.
• Air flow dynamics will create air movement in the room which will distribute comfort to all places in the building.
• Air flow effect in cooling and heating load results.
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Daylight Analysis
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Daylight Analysis
The analysis is made on 3 cases for each type (Traditional , Single skin façade and Double skin façade.
Cases used in Daylight Analysis
First case Second Case Third case
Type of glass Shading Type of glass Shading Type of glass Shading
Clr Dbl glazed
(U = 0.49, SHGC = 0.76,
VT =0.81)
No shading
Dbl glazed- low E glass (U =0.25,
SHGC =0.39, VT =
0.7)
No shading
Dbl glazed- low E glass (U =0.25, SHGC =0.39, VT =
0.7)
Shutters 50 cm depth, distance
between them 30 cm 60%
reflection
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Daylight Analysis
Every value of daylight factor will be represented by a specific color which expresses a certain situation .
The indicator and interpretation for each color for office building
Interpretation Performance indicator
Unacceptable +20%Unacceptable 18-20%Unacceptable 16-18%Unacceptable 14-16%Unacceptable 12-14%Unacceptable 10-12%Unacceptable, it causes an uncomfortable reaction to the eyes. 8-10%
Acceptable for conference room and drawing offices. 6-8%
Preferable large potential for daylight utilization, and ideal for paper work. 4-6%
Acceptable small potential for daylight utilization. 2-4%Unacceptably dark negligible potential for daylight utilization. 0-2%
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Daylight AnalysisDaylight factor for office 2
Third case Second case First case
3.43% 5.08% 5.72% Traditional
8.1% 9.29% 10.57% Single skin
7.05% 8.54% 12.02% Double skin
Although the window wall ratio in Single skin (90.2%) which is less than Double skin (96%) but the daylight
factor in double skin was better than Single skin.
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Acoustics
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Sources of noise1- External noise that come from
the main street.2- Noise transmission between
room through air vents.
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External Noise 1. STC (sound transmission class)
for double skin > 50 dB
2. STC for single skin Requires solution !
No problem
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Many solutions can be used to reduce the noise among them the use of barriers that prevent the transmission of sound for example:
Ventilated façade panel
Internal Noise
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Structural Design
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Structural Design
Glass Facade Construction
Traditional Building Elements Design
This part contains -:
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Glass Facade Construction
Design the components of building to limit deformation and make it
suitable for the deflection capacity of the rubber.
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Glass Facade Construction
Design the rubber around the frame to resist the maximum deformation
in the building.
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Glass Facade Construction
All glass that was used in this project contains laminated technology glass, which has outstanding safety properties.
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Glass Facade Construction details
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Glass Facade Construction details
Horizontal partition with hole
Outgoing air opening at the
top.
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Traditional Building Elements Design
Codes:• ACI -318-08: for reinforced concrete
structural design.• UBC -97: for earthquake load
computations.• ASCE for loads 07 (2005)
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Data Input
Element Dimensions/thicknessOne way ribbed slab 30 cmMain beams 30cm width x 60cm depth
Other main beams 30cm width x 50cm depth / 20cm width x 60cm depthSecondary beams 30cm width x 30cm depth
All columns 45cm x 45cm /45cm x 65cm /65cm x 65cm
Bracing (stone wall) 150cm x 20cmShear wall 30cm / 20cm
fc = 28 MPa For column, footings fc = 25 MPa For beams, slabs and shear
Fy = 420 MPa
Dead load = 3 kN/m2, Live load = 2.5 kN/m2
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3D SAP model
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Model Validation
1) Compatibility of structural
elements.
2) Global Equilibrium.
3) Local Equilibrium (Internal forces).
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Compatibility check
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Equilibrium check
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Internal force check
% difference SAP Manual Location Number
30.83 21.411 14.809 2nd Floor 2nd Floor slab
29.5 18.215 12.841 3rd Floor 3rd Floor slab
30.44 266.7 383.431 2nd floor Beam 15
35.43 89.866 139.192 3rd floor Beam 220.82 156.96 124.276 GF Column 276.87 973.78 906.874 2nd floor Column 8
All % difference are less than 50%
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Dynamic analysis
Response spectra method
The soil is soft lime stone “Sc”
Cv= 0.32
Ca= 0.24
R = 5.5
T(manual) = 0.4867 sec
T(SAP)= 0.536 sec
( with modal mass participation ratio =0.9)
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Slab Design
Section in slab at middle
Section in slab at support
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Beams Design
Cross Section
Longitudinal Section
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Columns Design
Cross Section
Longitudinal Section
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Footings Design
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Tie beams Design
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Shear wall & Wall footing Design
Shear wall details
Wall footing detail
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Stairs Design
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Mechanical Design
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Mechanical Design
-Elevator Design
- Water Supply Design
-Sanitation Design
- Fire protection design
This part contains -:
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Elevator Design• The recommended interval for the elevators 30-
39 s • The estimated population of the building
10 m2/person • Then the estimated population of the building
286.64 Person• The value of Handing Capacity (H.C) of elevator
system=Pop*PHC= 37.26 per/5min PHC is = 0.13
Design Conditions
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Elevator Design• The best number for this building is 2
elevators (Motor driven elevator).• The Car Capacity is 2500 Ib with Minimum Car
Speed is 350 feet per minute.• The elevator dimensions are (2.2, 2.4 m) and with 2.5 m/sec
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Water Supply Design We have two water networks :
1. One for the cold water (Blue Line) comes from the tanks.
2. The other for hot water (Red line) comes from the Solar water heating
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Water Supply Design We have 4 water tanks of
2m3 (each) and 4 Solar
water heaters each one
consists of 2 collectors.