Q U A N T I I T E S P R E S E N T A T I O N
ARC5520 ENERGY AND ARCHITECTURE
O T T V C A L C U L A T I O N B A S E D B E I T
O N Ang Kee Yen GS 49912
Annie Cha GS 49707
Chan Ai Ying GS 49711
Chew Hong Lin GS 50008
Wong Kah Wei GS50112
ARC5520 ENERGY AND ARCHITECTURE
ELEVATION 1
3
4
Roof Plan
2
1
[North] Front Elevation
3
[East] Right Elevation
2
[South] Rear Elevation
4
[West] Left Elevation
ARC5520 ENERGY AND ARCHITECTURE
WWR CALCULATION
WWR Window Area Total Area
Vertical Shading Device
North | South WWR : 0.38 |0.37 Total Area : 658 m2 Window Area : 251.04 m2
W1
East| West WWR : 0.30 | 0.30 Total Area : 280 m2 Window Area : 84.72 m2
W2
W3
W4
ARC5520 ENERGY AND ARCHITECTURE
OTTV PROPOSAL
OTTV calculation is DEPENDENT on this input
CALCULATED OTTV 35.46
W/m2
SHOE BOX SHAPED BUILDING ASSUMED Total AC Floor Area
1880
m2
2
floors
Floors to Floor Height
3.5
m
Aspect Ratio
2.35
to 1
Building Orientation (Index)
1.0
No of Floors (Including Ground)
Building Orientation (Local North facing where?)
North
Floor Area per Floor (Roof Area)
940
m2
Building Length (Local North)
47
m
Building Width
20
m
Total Wall Area
938
m
Actual Faรงade Direction
North
South
East
West
Local North
Local South
Local East
Local West
Solar Correction Factor
0.9
0.92
1.23
0.94
WWR
0.38
0.37
0.30
0.30
Alpha (Color of opaque Wall)
0.35
0.35
0.7
0.35
U-value of Walls
0.80
0.80
0.80
0.80
U-value of Glazing
4.50
4.50
4.50
4.50
SC of glazing
0.60
0.60
0.45
0.45
Opaque Wall Area (m2)
202.76
204.20
97.64
97.64
Glazing Area (m2)
126.24
124.80
42.36
42.36
329
329
140
140
Descriptions
Total Wall Area (m2)
TOTAL
938
ARC5520 ENERGY AND ARCHITECTURE
OTTV PROPOSAL
EXTERNAL SHADING OF GLAZING
HORIZONTAL SHADING
North
South
East
West
Width of Horizontal Projection [HP]
0.60
0.60
0.60
0.60
Height of fenestration [Z]
2.60
2.60
1.20
1.20
Height of top of fenestration to bottom of projection (Y)
0.00
0.00
0.00
0.00
VERTICAL SHADING
North
South
East
West
Width of Vertical Projection [VP]
0.20
0.20
0.00
0.00
Length of fenestration [L]
0.30
0.30
0.00
0.00
SC R2
1.00
1.00
1.00
1.00
Horizontal + Vertical Shading (Eggcrate)
TRUE
TRUE
FALSE
FALSE
R1 (refer to MS1525)
0.23
0.23
0.50
0.50
R2 (refer to MS1525)
0.67
0.67
0.00
0.00
SC R1 + R2 combined
0.56
0.56
0.77
0.79
SC of External Shades
0.56
0.56
0.84
0.85
Total SC
0.34
0.34
0.38
0.38
OTTVi
35.2
34.8
41.1
32.0
11,567
11,457
5,761
4475
3.9
3.9
2.4
2.4
Estimated Glazing Length (m)
48.08
46.82
35.00
35.00
Area Daylight (m2)
187.53
182.60
84.00
84.00
Total Daylight Area (m2)
1017.53
6.88
m2
493.50
m2
COMBINED SHADING
OTTVi x Area
CALCULATION OF DAYLIGHT AREA
CALCULATION OF DAYLIGHT AREA Depth of Daylight Factor of 1.5% (m) from faรงade
Percentage of Possible Daylight Area (%) Skylight Area Total Daylight Area covered by skylight
54%
ARC5520 ENERGY AND ARCHITECTURE
COST CALCULATION (OTTV)
NORTH | SOUTH (WWR : 0.38 | 0.37) Total Area
EAST| WEST (WWR : 0.30 | 0.30) 658 m2
Total Area
280 m2
Glazing Area
251.04 m2
Glazing Area
84.72 m2
Wall Area
406.96 m2
Wall Area
195.28 m2
U VALUE OF GLAZING CALCULATION
U VALUE OF WALL CALCULATION Lightweight Block Wall
0.8
RM 15
AxB (RM)
North | South
251.04
0
0
2929
East | West
84.72
0
0
9033
TOTAL (RM)
AxB (RM)
North | South
406.96
15
6104
East | West
195.28
15
SC GLAZING CALCULATION
0
SHADING DEVICE CALCULATION (HP + VP)
Clear Evergreen
0.60 0.45
RM 0 RM 40
Shading Device ‘
Glazing Area [A]
Price (RM) [B]
AxB (RM)
North | South
251.04
0
0
East | West
84.72
40
3389 3389
/ m2 Price (RM) [B]
AxB (RM)
Vertical Shading
198.40
75
14880
Horizontal Shading
161.35
75
12101
359.75 TOTAL (RM)
U Value of Glazing Calculation
RM75
Area [A]
TOTAL (RM) TOTAL COST CALCULATION U Value of Wall Calculation
RM 0
Price (RM) [B]
Price (RM) [B]
TOTAL (RM)
4.5
Glazing Area [A]
Wall Area [A]
TOTAL (RM)
Single low-E glazing window
9033 0
SC Glazing Calculation
3389
Shading Device Calculation
26981
SUB TOTAL (OTTV)
39400
26981
ARC5520 ENERGY AND ARCHITECTURE
MATERIAL APPLICATION
(Presented products from green page)
Product A Thermoshield
✓ High insulation properties. ✓ Ability to counter ‘radiant heat’ transfer. ✓ Unlike other coatings, it contains ceramic particles. These particles are the heat dissipating elements that give it the ability to save on cooling cost. It is applied to yield a tough, water tight, roof membrane. ✓ Corrosion prevention.
Product B Solatube
✓ Capture sunlight using rooftop dome and evenly dispersed into interior space. ✓ Combines daylighting and ventilation into one attractive fixture, leaving the rooms humidity-free ✓ Additional of solar panel could be added to power the light during night
ARC5520 ENERGY AND ARCHITECTURE
COST CALCULATION (RTTV) CALCULATION OF THERMOSHIELD’S U-VALUE Total Roof Area = 940m² Area covered per drum = 32m² Total no. of drum used = 940/32 = 30 drum THERMOSHIELD PAINT ON ROOF 1 Drum = RM 1600
TOTAL
No. of drum [A]
Price (RM) [B]
AxB (RM)
30
1600
48000
TOTAL COST CALCULATION TOTAL (RM) THERMOSHIELD PAINT ON ROOF
48000
SUB TOTAL (RTTV)
48000
Reduction of 49.5% from the original metal roofing temperature (from 68.9°C to 34.8°C)
U-value = 1/R U-value of thermoshield = (1/2.1)+(1/4.2)+(1/6.3) = 0.87
ARC5520 ENERGY AND ARCHITECTURE
CALCULATION OF SOLATUBE DAYLIGHTING 47 m Location of Solatube Sky Vault on above (740mm diameter )
Total Skylight Area = π x 0.37^2 x 16nos. = 6.88 m2
5.25 m
10.5 m
5.25 m
Floor area gain daylighting after installed Solatube Sky Vault
FIRST FLOOR PLAN
Total Floor Area Gained Daylighting from Solatube = 10.5m x 47m = 493.5m2 Percentage of total Floor Area Gained Daylighting Solatube Spacing Calculation 1.5 MH
= 1.5 x 3.5 m = 5.25 m
= 493.5m2/1880m2 x 100% = 26.25%
ARC5520 ENERGY AND ARCHITECTURE
COST CALCULATION (Lighting Power)
Percentage of AC Floor Area using Daylight = 54% = 1015.2 m2
LIGHT SENSOR RM5 per m2
TOTAL
Area [A]
Price (RM) [B]
AxB (RM)
1015.2
5
5076
Total number of Solatube (SKY Vault) used = 16 nos. SOLATUBE (SKY VAULT) RM4000 each
TOTAL
Total no. use [A]
Price (RM) [B]
AxB (RM)
16
4000
64000
TOTAL COST CALCULATION TOTAL (RM) LIGHT SENSOR
5076
SOLATUBE (SKY VAULT)
64000
SUB TOTAL (Lighting Power)
69076
ARC5520 ENERGY AND ARCHITECTURE
COST IMPLICATION, PAYBACK & ROI Total Capital Cost of Improvement TOTAL (RM)
OTTV
39,400
RTTV
48,000
LIGHTING POWER
69,076
GRAND TOTAL
156,476
BUILDING
BEI for AC Floor Area (kWh/m2/year)
Baseline Building
244.4
Proposed Building
173.2
BEI Saved:
71.2
SAVINGS
BEI Saved (kWh/m2/year)
Energy Saved (MWh/year)
TNB Charges
Estimated Cost Savings (RM/year)
71.2
133.9
0.36
48,210
Capital Cost of improvement
RM 156,476
Estimated Cost Saving
RM 48,210
Simple Payback (years)
Estimated Cost Saving Capital Cost of Improvement TOTAL PROFIT
3.2 years Estimated Cost Saving per Year [A]
Period (years) [B]
(RM)
48,210
10
482,100
-
-
156,476 325,624
In 10 years, Total Profit = RM 325,624 Profit per Year = RM 32,562.40 ROI = [ Profit per year / Capital Cost of Improvement ] x 100% = [ RM 32,562. 40 / RM 156,476 ] x 100% = 20.8%
ARC5520 ENERGY AND ARCHITECTURE
CONCLUSION
Total predicted energy saving of 29%
Total saving of 134MWh/year Total predicted savings for building is RM48,210/year Total investment cost of RM 156,476 Simple Payback of 3.2 years only
Modification to reduce BEI ✓ Reduced WWR value ✓ Reduced number of floors ✓ Design of fins that also aesthetic-value added ✓ Shading Coefficient (SC) Glazing on east & west ✓ Application of green product to reduce RTTV by using Thermoshield ✓ Application of green product to reduce lighting energy consumption by using Solatube CALCULATED BEI
BASELINE
244 kWh/m2/year
PROPOSED
173 kWh/m2/year