the secret of ee facades - ksg.com.my · üproper commissioning. source : uk energy efficiency best...
TRANSCRIPT
The Secret of Energy Efficient
FA˙ ADES
fenestra.com.my
DEFINITION OF A GREEN BUILDING
A building that meets codes and saves ENERGY
Source : Architecture 2030
U.S. Energy Consumption by Sector
Source : Architecture 2030
Architecture is the big Consumer
ü PROPER COMMISSIONING
Source : UK Energy Efficiency Best Practice Program Energy Consumption Guide 19: Energy Use in Offices
1ST LAW OF THERMODYNAMICSenergy is neither created nor destroyed
Air conditioning load is due to lighting, equipment, peopleand heat gained through the facade
people
FACADE
equipment
lighting
Sources of Building Heat Load
7.3%5.5%
9.1%
10.9%
21.8%
45.5%
Fan energy
Misc loads
ventilation
Plug load
Lighting
façade
The biggest cost items are typically SUPERSTRUCTURE, FACADES and MEP SERVICES
USELESSGLASS !
J ☺
ü LIMIT THE GLAZING AREA TO 30 35%ü USE HIGH PERFORMANCE GLASS
How efficient is your façade?
OTTVOverall Thermal Transfer Value
WATTS PER M2
OTTV x skin area =
HEAT (Watts)
glass conduction
wall conduction
glasssolar
5%
10% -20%80%
α (1 WWR)Uw + (WWR)Uf + ( x CF x WWR x SC)15 6 194
OTTV Simplified Formula
WALL WINDOW SOLAR GAIN THROUGH GLASS
Orientation of Buildings
α (1 WWR)Uw + (WWR)Uf + ( x CF x WWR x SC)15 6 194
OTTV Simplified Formula
WALL WINDOW SOLAR GAIN THROUGH GLASS
The Window Wall Ratio
Window WallRatio
FacadeArea
WWR - Window / Wall Ratio (%)11 13 15 17 19 21 23 25 27 29
OTTV 36 39 44 47 51 55 59 63 67 71
RNC
OTTV vs WWR and SC
Window / Wall Ratio (%)11 13 15 17 19 21 23 25 27 29
OTTV 36 39 44 47 51 55 59 63 67 71
Glass Shading Coefficient0.35 0.45 0.55 0.65 0.70 0.75 0.80 0.85 0.90 0.95
OTTV 37 42 48 53 55 58 60 63 66 68
Design Assumptions
WWR = 25 %Glazing SC = 0.85Glazing U-Value = 5.7 W/m2 KWall U-Value = 3.2 W/m2 KOTTV = 63 W/m2
Target OTTV2
RNC EE CRITERIA Points
EE1 : Minimum EE PerformanceEE2 : Renewable EnergyEE3 : Advanced EE Performance
based on OTTV + RTTVEE4 : Home Office + ConnectivityEE5 : Sustainable Maintenance
35
10
23
RNC
EE1 : MINIMUM EEPERFORMANCE
INTENT
Establishing minimum EE performance to reduce energy consumption in buildings, thus reducing carbon dioxide emission to the atmosphere.
REQUIREMENT Points
Meet MS 1525:2007 specifications: § OTTV 2
§ RTTV 2
AND§ Roof U values
2K for lightweight roofs2K for heavyweight roofs
3
ROOF WEIGHT GROUPlightweight roof = < 50 kg/m2
heavyweight roof = > 50 kg/m2
RNC
EE3 : ADVANCED EE PERFORMANCE
INTENT
Enhance building to provide thermally comfortable environment to reduce the use of air-conditioning
REQUIREMENT Points
§ OTTV 2, Roof U values 2K (lightwt), 2K (heavywt)
§ OTTV 2, Roof U values2K (lightwt), 2K (heavywt)
§ OTTV 2, Roof U values 2K (lightwt), 2K (heavywt)
§ OTTV 2, Roof U values 2K (lightwt), 2K (heavywt)
§ OTTV 2, Roof U values 2K (lightwt), 2K
(heavywt)
2
4
6
8
10
RNC
EE3 : ADVANCED EE PERFORMANCE
Window / Wall Ratio (%)11 13 15 17 19 21 23 25 27 29
OTTV 36 39 44 47 51 55 59 63 67 71
Glass Shading Coefficient0.35 0.45 0.55 0.65 0.70 0.75 0.80 0.85 0.90 0.95
OTTV 37 42 48 53 55 58 60 63 66 68
Design to MS 1525:2007
WWR = 25 %Glazing SC = 0.60Glazing U-Value = 5.7 W/m2 KWall U-Value = 3.2 W/m2 KOTTV = 50 W/m2
Target OTTV2 - 2 points2 - 4 points2 - 6 points2 - 8 points2 - 10 points
RNC
EE1 : MINIMUM EE PERFORMANCE
ROOF U VALUE CALCULATIONS
123
4,5
6
123
4
Target Roof U Value2K
RNC
EE3 : ADVANCED EEPERFORMANCE
ROOF U VALUE CALCULATIONS+2
points
+6points
+10 points
+4 points
+8 points
Sound insulation does not work when the air gap is small, say 6 mm
Increase air gap = 20 to 100 mm
DGUdouble glazed unit
COST OF OPERATING AN OFFICE BUILDING
Element RM per m2
Construction Cost
Retrofit of the building - every 10 years
Electricity
Maintenance
Opex (Insurance/rates/ etc)
Salaries
Total
COST OF OPERATING AN OFFICE BUILDING
Element RM per m2
Construction Cost 3,850Retrofit of the building - every 10 years
Electricity
Maintenance
Opex (Insurance/rates/ etc)
Salaries
Total
COST OF OPERATING AN OFFICE BUILDING
Element RM per m2
Construction Cost 3,850Retrofit of the building - every 10 years 550Electricity
Maintenance
Opex (Insurance/rates/ etc)
Salaries
Total
COST OF OPERATING AN OFFICE BUILDING
Element RM per m2
Construction Cost 3,850Retrofit of the building - every 10 years 550Electricity - 250 kwhr/m2-year @ RM 0.39 98Maintenance
Opex (Insurance/rates/ etc)
Salaries
Total
COST OF OPERATING AN OFFICE BUILDING
Element RM per m2
Construction Cost 3,850Retrofit of the building - every 10 years 550Electricity - 250 kwhr/m2-year @ RM 0.39 98Maintenance 75Opex (Insurance/rates/ etc)
Salaries
Total
COST OF OPERATING AN OFFICE BUILDING
Element RM per m2
Construction Cost 3,850Retrofit of the building - every 10 years 550Electricity - 250 kwhr/m2-year @ RM 0.39 98Maintenance 75Opex (Insurance/rates/ etc) 120Salaries
Total
COST OF OPERATING AN OFFICE BUILDING
Element RM per m2
Construction Cost 3,850Retrofit of the building - every 10 years 550Electricity - 250 kwhr/m2-year @ RM 0.39 98Maintenance 75Opex (Insurance/rates/ etc) 120
SalariesAverage salary say RM 3,500 per month
Average salary per annum RM 42,000
Occupancy 1 person per 10 m2
Total
COST OF OPERATING AN OFFICE BUILDING
Element RM per m2
Construction Cost 3,850Retrofit of the building - every 10 years 550Electricity - 250 kwhr/m2-year @ RM 0.39 98Maintenance 75Opex (Insurance/rates/ etc) 120
SalariesAverage salary say RM 3,500 per month
Average salary per annum RM 42,000
Occupancy 1 person per 10 m2
4,200
Total
COST OF OPERATING AN OFFICE BUILDING
Element RM per m2
Construction Cost 3,850Retrofit of the building - every 10 years 550Electricity - 250 kwhr/m2-year @ RM 0.39 98Maintenance 75Opex (Insurance/rates/ etc) 120
SalariesAverage salary say RM 3,500 per month
Average salary per annum RM 42,000
Occupancy 1 person per 10 m2
4,200
Total 8,893
COST OF OPERATING AN OFFICE BUILDING
Element RM per m2
Construction Cost 3,850Retrofit of the building - every 10 years 550Electricity - 250 kwhr/m2-year @ RM 0.39 98Maintenance 75Opex (Insurance/rates/ etc) 120
SalariesAverage salary say RM 3,500 per month
Average salary per annum RM 42,000
Occupancy 1 person per 10 m2
4,200
Total 8,893
Assume inflation at 2.5% per annum
50 YEAR LIFE CYCLE COST OF OFFICE BUILDING
THANK YOU
Fenestra Malaysia Sdn BhdJ-5-12 Solaris Mont Kiara
2 Jalan Solaris50480 Kuala Lumpur
T +603 6205 1288F +603 6205 1289E [email protected]