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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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