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energy efficient buildings
Hiren Bhagat
Environmental Design Solutions Pvt. Ltd [EDS]Associate Director
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Simulation tools for building
es gn
Advanced com uter tools exist to model whole
building and building systems Computer simulation models are most commonly
used for optimizing:
Concept Design
Interior Lighting
Energy
HVAC Design
Simulation is key to integrated design
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Integrated Design for Sustainability
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Optimize
Concept Design
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Optimize Concept Design
SITE Insolation
Analysis Identifying heat islands,
potentials for mutual
shading,
zoning possibilities and
built forms.
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Optimize Concept Design
NORTH
from the existing
site.EASTWEST
NORTH
SOUTH
EAST
Study Building
WEST
SOUTHLEGEND
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F
B
G
A
N N
A BF
G
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Optimize
Faade Systems
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Fa ade insolationDue to variant solar Insolation
,
faade can be designed fordifferent specifications from
bottom to top.
-
or Double Glazing can be
indentified based on he
insolations on the faade.
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Faade insolation
Fenestration area and
percentage Vision Area V/S
pan re rea.
occupied spaces.
Organization of air conditioned
and non air conditioned zones.
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Envelope Material Selection
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Wall Window Ratio:
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Optimize
Day-lighting
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Shading Design Options
Shaded Time Zone
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Daylight Factor
Without Overhang
May 11, 2010 23
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Daylight Factor
With Overhang
May 11, 2010 25
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Optimize
Interior Lighting
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Optimize Interior Lighting
Daylight Controls
regulate the level of illumination
provided by electric lights in response to
a sensing device (photocell orp o osensor a mon ors e er e
total/available light level in the space
Control module that then switches ordims the electric lighting to maintain the
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energy use.
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Optimize Interior Lighting
Integrated Lighting design
and is turned off or dimmed first
C receives the least daylightmaintain wall brightness
An integrated electric lighting scheme should deliver electric
light to the same surfaces as the daylight in order to minimize
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c anges n room sur ace r g ness
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Energy Modeling &
AnalysisSimulation of
ECMs
Develo in
Thermal
Specification
Glazing Analysis
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na ys s o a ous ng comp ex
1. Actual Buildin 2. Simulation Input
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333. ECM Analysis 4. Output/Results
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nergy na ys s
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p m z ng g az ng area
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Note: South Orientation, Double Green Glass, Warm Coastal Climate
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ass e ec on na ys s
HVAC Energy/Cost
Glazing Type
ota
Energy Use(kWh)
nergy
Cost(Rs/Yr)#
avings
over BaseCase (%)
ncrementa
Cost of Glass(Rs)
imp e
PaybackPeriod (Yrs)
Antelio Emerald 4,534,687 22673435 - - -
Deep green-ST408 4,075,159 20375795 10% 3899091 1.7
Aquamarine-ST420 4,204,361 21021805 7% 3899091 2.4
Blue Green-ST436 4,325,001 21625005 5% 3899091 3.7
- , , .
Single-ST436 4,428,799 22143995 2% 2042381 3.9
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Energy analysis
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Energy analysis results for an office building
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nergy av ngs na ys s esu s
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Weather
Building SimulationSimulation tool
description outputs- physical data- design parameters
- energy consumption (MWh)
- energy demands (kW)
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- environmental conditions
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E - 1 0NERGY
-ESP-rSolar-5
Building Energy
E-20-II & HAP
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TRACE 600
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es gn Evaluation of s stem
type options
System Sizing
Controls
Optimization
n egra e u ng
Management System
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