CaseStudy-DeepakKumar

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Case Studies: Energy efficient buildings

Space Matrix Design consultants, BangaloreBEE - Empanelled architects

CASESTUDIES Energy efficient buildings

Deepak Kumar. C

Team Lead, Green Cell.

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Case Studies: Energy efficient buildings

rowthout of natures scale to protect us

N

A

T

U

RE

NTUR

NA

T

U

R

E

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Case Studies: Energy efficient buildings

INFOSYS Mysore

Architect: Hafeez contractor, Mumbai

Energy consultancy: Mc D Berl and Spacematrix, Bangalore.

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Case Studies: Energy efficient buildings

Building orientation

As the best orientation the face of the building should face north. As the building is in Lshape, a wing of the building falls in best orientation category while the other part of L is

worst oriented,

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Case Studies: Energy efficient buildings

Faade shading analysis

Conclusion:Window width 3900mm

Window height 1250mm

External light shelves or projection 700mm, same as thickness of cavity wall

Translucent PVB Laminate glass

Solar Pergolas 150mm wide, 450 angles, 150 mm C/C, 6 nos. after external light shelves

of 700 mmVertical fins of translucent PVB Laminate glass 750 mm, 4 numbers

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Case Studies: Energy efficient buildings

Visual discomfort glare analysis North - south

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Case Studies: Energy efficient buildings

Visual discomfort glare analysis East - West

Day Light Analysis- North and South Orientation

Case1:Visible reflectance of internal 600 mm and external light

shelves of 700 mm with normal concrete projection

without high visible reflective cladding or high albedo

coat 30%

Ceiling visible reflectance 75%Visual Light Transmittance for both light window and

vision window 63%

Lux level to be achieved 450 Lux

Light power density 8 W/m2 (this is as per analysis

provided by Infosys).

Case2:Visible reflectance of internal 600 mm and external light

shelves of 700 mm with concrete projection with high

visible reflective cladding or high albedo coat 70%

Ceiling visible reflectance 75%

Visual Light Transmittance for both light window and

vision window 63%

Lux level to be achieved 450 Lux

Light power density 8 W/m2 (this is as per analysis

provided by Infosys)

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Case Studies: Energy efficient buildings

Floor plate daylight analysis

Meeting and Conferences to be controlled with occupancy sensors. All lights will be ON if in use. No

daylight integration considered.

668 m2 per floor (70% of total carpet area per floor) in each wing is daylite out of 929 m2 of office

area.

19% of office space is meeting and conference facilities. This is controlled by only occupancysensor and not considered for daylight integration.

11% of office space is not daylite as it does not have external vision window or light window.

Annaul average operational saving of 35% electricity consumption.

Daylite areas Daylite areas Daylite areas

Daylite areas

Daylite areas Daylite areas

Daylite areas

Daylite areas

NO Daylight

ONLY Occupancy control

NO daylight considered

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Case Studies: Energy efficient buildings

RNS auditorium Bangalore

Building faade:

All-round corridors and faade shading by aluminum box sections on

south-west and North-East faade.

70% of wall area has wooden paneling, which helps in reducing heatloads.

Artificial lighting:

Energy efficient general lighting fixtures with high lumen output 2 ft T8

18W lamps and with mercury content of 2-3 mg.

Micro CFL accent lighting.

Light power density (LPD): 10 W/m2 (ECBC

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Case Studies: Energy efficient buildings

Auditorium used 80% for marriages (High Latent load).

Conventional case: 100 TR.

Proposed case cooling: 75 TR (25 TR: 3 numbers).

10% saving by shading and roof insulation.

Bangalore winter evening temperatures go down to 18 21

deg C.

Thermostat control to open up 100% fresh air dampers when

temperature drops below 19 deg C indoor temp 24 deg C.

CO2 control (500 ppm inside outside diff, ASHRAE 62) to take

care of fluctuating occupancy of marriage halls by optimizing

fresh air intake. Savings of 23%. Total Annual energy saving of 30 40%.

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Case Studies: Energy efficient buildings

Zed AC

Air filtering

Evaporative cooling

with water

Latent cooling with

chilled water

100%

Fresh Air

Intelligent

Control

Built-inconnections

Eco friendly, 100% fresh air, low- energy air

conditioning systems.

Runs at 1.5 times the efficiency of the regular splitunit and saves up to 50% of monthly power bills.

Zed

AC

Conventional

AC

Power

Consumption

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Case Studies: Energy efficient buildings

Energy Management

Power consumption

T zed homes Conventional homes

2000 Sft Flat 2400 kwhrs or units

per year

5000 units per year

3000 Sft Villa 5000 kwhrs or units

per year

8000 units per year

AC Energy Efficiency Ratio

(EER)

ZED AC EER -12

Conventional EER 8

ZED AC Seasonal EER (SEER) 30

Conventional SEER-15

150 % efficient

200 % efficient

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Case Studies: Energy efficient buildings

Site area 65340 sft and builtup area of 95,000 sft

The campus accommodates48 homes to an acre (19homes/ Ha)

The entire campus has a

gross density of 230ppa (92PPHa)

Planned to cater for water and power autonomy

No import of water

No export of waste

No fossil fuel for power

No terracotta and burnt clay

No toxic chemicals - for paints and waterproofing

No ACs. Passive coolingwith geothermal earth air tunnels and Wind stacks

6600 LEDsfor all campus lighting

or 400 units /day

or 150,000 units/year

or Rs.7.5 lacs/year

35000 ltrs of watergrown on campus /day -----

equivalent to fifteen 20 ltrs water

cans / home / day

76 lacltrs water saving/ annum

equivalent to 1000 water

tankers

Earth Air Tunnel Cooling