OTTV & BEIT Application

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