The document discusses case studies of energy-efficient buildings, focusing primarily on ITC Green Centre in Gurgaon and CSR House in Australia. ITC Green Centre employs features like an 'L' shape design, double-glazed windows, and advanced daylight control systems to enhance natural lighting and reduce energy consumption. CSR House emphasizes effective insulation, ventilation, and intelligent lighting controls to achieve high energy efficiency, aiming for an 8-star rating in thermal comfort.

1. ASSIGNMENTON
CASE STUDIES OF ENERGY EFFICIENT
BUILDINGS
SUBMITTED BY –
SAHIL KAUNDAL
11613
B.ARCH. 4thYear
SUBMITTED TO –
AR. SANJAY BHANDARI
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2. ECBC Complaint Building, ITC Green Centre, Gurgaon
General Information: Client:ITC Green centreCity:GurgaonClimate:CompositeOperational schedule–10 hours, 5 working days in a weekArea of the building:15,799m² (out of which 9294 m² - conditioned area, 6505 m² -non-conditioned area)
Building Design Features:
•‘L’ shape design with main entrance towards north
•Longer axes along NE and NW directions
•By ‘L’ shape configuration, the width of the floor Plate is reduced for the same amount of floor plate area thereby allowing natural light to penetrate deep into the interior spaces.
•It ensures that part of the façade is always shaded
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3. ITC Green Centre, GurgaonWalls -
Walls of air-conditioned zones in all blocks –230mm AAC block with 70mm stone cladding and 12.5 mm plaster insideRoof-
120mm RCC roof with 76mm ISO board on interior sideWindows -
•Double glazing window (6-12- 6)
•Glass on north orientation has a lighter light transmission
•The glazing for the building has been designed to maximize the effect of natural light, largely eliminating the need for artificial light during day time.
•The high performance window glass, while allowing light inside, does not allow heat and also keeps office cool from inside during the day decreasing the load on HVAC systems.
•Higher light Transmission Glass on North orientation for better day light integration
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4. ITC Green Centre, GurgaonDaylight Controls-
•Switch off daylight sensors with Philips make (model no. LRI 1430/00 ENEC)
•Daylight controls switch off lights when daylight is sufficient, reducing the energy consumption of the buildingLighting system -
Luminaires used –mostly CFLs and T5 lamps in mirror optic fixtures, 36W fluorescent lamps and magnetic ballasts are used in storages, electrical and mechanical rooms
•LPD –7.2W/m2
•
•The LPD (7.2W/m2) is less than the max allowed LPD of ECBC (10.8W/m2) which is very good.
•According to Energy Star, CFLs provide the same amount of light as an ordinary bulb using 75% less energy
•T5 lights have higher efficiency and system miniaturization with daylight life about 18000 hours as compared to 8000 hours of standard fluorescent lamps
•Good natural light available in office spaces
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5. CSR HOUSE, NSW(AUSTRALIA)
CSR is Australasia’s leading building products supplier,
driving innovation in the building and construction industry
through continued investment in research and development
to further improve building systems and solutions. This
investment helps designers, builders and trades overcome
the day-to-day challenges they face in design offices and on
sites all around Australia and New Zealand.
CSR House-
The primary aim of the CSR House
project was to design
and build an attractive 8 Star energy
efficient home as
inexpensively as possible.
Thermal Comfort Star Ratings-
Heating and cooling energy makes up around
40% of the overall
energy use in a home – the biggest home
energy requirement by far.
• Adequate levels of
insulation in walls,
ceilings and floors
• Draft proofing the
building envelope
• Effective ventilation to
control internal
temperatures and air
quality
Good Energy
Efficient Design-
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6. CSR HOUSE, NSW(AUSTRALIA)
Whole of house energy
While heating and cooling energy use is the biggest
home energy cost, there are other areas where
significant savings can be made. In the CSR House,
our approach was to start with the building fabric, then
look at appliances, followed by solar energy.
Water Heating-
Hills Solar gas boosted,
evacuated tube system
because of its higher level of
solar efficiency regardless of
orientation.
Intelligent Lighting and Controls-
Philips LED and compact fluorescent lighting to maximise
energy savings and help to create a flexible and more
comfortable living environment. All lights are surface
mounted to minimise ceiling air leakage.
A lighting automation system is installed to control the
lighting and air conditioning for optimal energy management.
The system can be accessed remotely via computer or
smartphone.
Standby Power-
7
The little LED lights in your entertainment systems
and appliances also contribute to a home’s total
energy use. Simply turning the power off at the wall
switch can save on power bills.
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