dhe-tm 6 lw day 1 endekatan konsep hemat energi - jatmika adi(1)
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Pendekatan Konsep Hemat Energi
pada Proses Pelaksanaan Desain
Gedung Baru
Jatmika Adi Suryabrata,
Dept. of Architecture, Gadjah Mada University
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Typical energy consumption for large office: Hawaii
Around 50% to 70% of
energy consumption in
typical office building
goes to HVAC and lighting
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Breakdown cooling loads: dominated by external heat gain
60%
3%
6%
23%
8%
Windows
Walls
Lighting
Equipment
Occupancy
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Thermal Comfort Basics:
M Rd Cv Cd = S
Rd
Rd
Rd
CdCd
Rd
Cv
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Olgyay s bioclimatic chart, modified for warm climates
Bioclimatic ChartApproximate of tropical climates
SNI: 25C
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Orientation & solar heat gain
Horizontal
roof
Vertical
South
Vertical
East & West
Vertical
North
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Building Form & Orientation: FISIP UIN Jakarta
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Building Form & Orientation: FISIP UIN Jakarta
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Building Form & Orientation: Gedung Menteri, Kementrian PU
Originalblock plan:
Larger area of the building is
orientedto east and west
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Original building form Modified building form
Modified Building form:
1. Reduced surface exposure of the working spaces to east and west sun
2. Narrow building form improve daylight performance
Building Form & Orientation: Gedung Menteri, Kementrian PU
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Light shelf better daylight distribution
Return air
Gedung Menteri, Kementrian PU: Lightshelves & thermal insulation
thermal insulation
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Gedung Menteri, Kementrian PU: Mockup Lightshelves
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Gedung Menteri, Kementrian PU: Daylight performance
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An example of daylighting with lightshelves: D3 Faculty of Economics, UGM
Room width 8 m, an average of 200 lux is obtained at the center of the room with
all draperies are closed.
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Common problem in Jakarta: curtain glass wall with closed vertical blinds
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Horizontal blinds & lightshelves for better daylight control anddistribution
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Gedung Menteri, Kementrian PU: Image impressions
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Sun shading & double facades: an example (WS Atkins Architects)
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Integrated vertical transportation: discourage using elevator/lift
Gedung Menteri PU, Jakarta FISIP-UIN, Jakarta
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Olgyay s bioclimatic chart, modified for warm climates
Bioclimatic Chart: Increasing heat loss through convection
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Air speed required to offset temperature increase(Marc E. Fountain and Mward A. Arens, Ph.D)
Occupants can offset an increased thermostat setting of 4.7F (2.6C)
by providing 160 fpm (0.8 m/s) of low-cost air flow from circulator fans
and enjoy normal comfort while saving air conditioning operating cost.
On the basis of the Exeloncorp (2005) recommendation, an increase in
the thermostat setting of 4.7F would provide cooling energy savings
from 14% to 19% (Dr. Richard Aynsley)
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Combination of ceiling fan and Air Conditioning: Dept of Arch, UGM
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Automatic control & sensors for effective energy management
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Radiant cooling system:
Reduce MRT to compensate for higher temperature setting
M Rd Cv Cd = S
Rd
RdRd
CdCd
Rd
Cv
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2nd floor
chiller and
HVAC
equipments
Concrete Core
TemperatureControl
Much more
efficient
Than
conventional
HVAC
Austrian embassy, Jakarta: Radiant Cooling System
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Brick Wall
Insulation
Window with
double-glazing
Brick Wall
Insulation
Austrian embassy, Jakarta: high performance insulation
Wood
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High performance thermal insulation for the entire building
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Austrian embassy, Jakarta: Front elevation
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Energy Efficient lighting design: select the appropriate luminaire
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Energy Efficient lighting design: create brighter interior surfaces with up
lighting & wall washer
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Energy Efficient lighting design: task and general lighting
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Owner
requirements
Integrated Design
Team
Monitoring:
Design phase
Construction phase
Operational
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Thank you