passive solar design and energy efficiency in...
TRANSCRIPT
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PASSIVE SOLAR DESIGN and
ENERGY EFFICIENCY In Buildings
By:
Professor Emeritus Dato’ Ar. Dr. Elias @ Ilias Salleh Solar Energy Research Institute Universiti Kebangsaan Malaysia
16 October 2013
QAST 2013 Conference Dinner Talk
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THE MESSAGE
“ ENERGY EFFICIENCY IN BUILDINGS
SHOULD START WITH
EXPLOITING ALL PASSIVE SOLAR DESIGN POSSIBILITIES
AT THE DESIGN STAGE “
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GREEN BUILDING INITIATIVES IN MALAYSIA
GREEN PASS – CIDB PENARAFAN HIJAU (pH JKR) - JKR GREEN RE - REHDA PASSIVE HOUSE (PASSIVHAUS) ?
GBI
MALAYSIA GREEN BUILDING CONFEDERATION
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ENERGY EFFICIENCY IN GBI SYSTEM: GBI POINTS ALLOCATION
CRITERIA
RESIDENTIAL
NON RESIDENTIAL
EE ENERGY EFFICIENCY 23 35
EQ ENVIRONMENTAL QUALITY 12 21
SM SITE & MANAGEMENT 33 16
MR MATERIAL & RESOURCE 12 11
WE WATER EFFICIENCY 12 10
IN INNOVATION 8 7
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BEI - BUILDING ENERGY INDEX
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MS 1525:2007 - CONTENTS Clause 0 Introduction 1 Scope 2 Referenced Documents 3 Definitions 4 Architectural and Passive Design Strategy 5 Building Envelope 6 Lighting 7 Electric Power and Distribution 8 Air-Conditioning and Mechanical Ventilation System 9 Energy Management Control System 10 Building Energy Simulation Method
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MS 1525:2007 (revised 2013) 4.2 Passive Design Strategy The basic approach towards good passive design is to orientate, to shade, to insulate, to ventilate and to daylit buildings. (efficiently ?)
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PASSIVE SOLAR DESIGN Passive solar design is design that takes advantage of natural climate and energy to maintain indoor environmental comfort
Components
• Locality • Climate • Environmental Comfort
• Daylighting • Passive Cooling • Passive Heating
Bioclimatic Design Passive Solar Systems +
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PASSIVE SOLAR DESIGN Basic strategies
• ORIENTATION • SHADING • INSULATION • VENTILATION • Passive Solar Systems
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ORIENTATION WHERE IS THE SUN ?
ALT = ALTITUDE ANGLE AZI = AZIMUTH ANGLE
KUALA LUMPUR
NEW YORK
SYDNEY
WHERE IS THE WIND ?
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Solar Chart superimposed by Shadow Angle Protractor
SHADING
WHAT ANGLES ?
VSA VERTICAL SHADOW ANGLE
HSA
HORIZONTAL SHADOW ANGLE
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Model 1 Model 2 Model 3
SOLAR GAIN REDUCTION THROUGH SHADING
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INSULATION
WHAT R-Value ? WHAT U-Value ? WHAT E-Value ?
R-value is just a measure of heat transfer by conduction
Surface Emittance ChartBlack Body, 1
Emittance of Aluminum Paint, 0.5
Emittance of Common Building Materials, 0.9
Emittance of an Aluminum Coating, 0.22
< 0.1 = Radiant Barrier, 0.1
Foil Radiant Barrier, 0.030
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
0 = No Radiation and 1 = Black Body or Maximum Radiant Heat Transfer
Em
ittan
ce 0
to 1
.0
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VENTILATION
WHAT AIR CHANGE RATE ? WHAT AIR VELOCITY ?
LANCHESTER LIBRARY, COVENTRY
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Passive Solar System
DAYLIGHTING SIDE WINDOWS, HIGH WINDOWS, PIPED DAYLIGHT
GREENHOUSE SPACE HEATING
NIGHT VENTILATION STRUCTURAL COOLING, ROOF POND
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“ ENERGY EFFICIENCY IN BUILDINGS
SHOULD START WITH EXPLOITING ALL PASSIVE SOLAR DESIGN POSSIBILITIES
AT THE DESIGN STAGE “
(Use of Simulation Techniques)
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TROPICAL PASSIVHAUS ?
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THANK YOU !