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Visit us at
ACREX 2013
Stand No. N 3
7-9 March 2013
Bombay Exhibition
Centre Mumbai

4. ublisher’s Letter
D evelopments over the last decade in Heating, ventilation and Air conditioning
industry are phenomenal. There are far more advanced, energy efficient
and Green products available in market today for industrial as well as domestic
applications. An article 'A Brief Guide to HVAC Pre-planning' highlights HVAC
systems are major energy consumer in both industrial and domestic applications.
In process cooling an HVAC energy consumption may vary from 20% to 60% of
total energy consumption depending on process requirements.
A Direct Structure Cooling System in a building uses minimal energy, has zero
water loss and helps reduce global warming. It is also affordable, since it uses
simple local equipment, inexpensive materials and has near zero running cost,
thus becoming a sustainable solution. Overall, study on 'An Analysis Of Direct
Technologies, Structure Cooling' showed that even by introducing Direct Structure Cooling only
employed in at the roof, a large amount of heat could be prevented from reaching the
occupant, thus achieving their thermal comfort.
green building
Green building practices aim to reduce the environmental impact of buildings.
are constantly While the practices or technologies, employed in green building are constantly
evolving and may differ from region to region, fundamental principles persist
evolving from which the method is derived is discussed in 'Green Building and Renewable
reducing Environmental Impact.' Also worth reading is an interesting project on
Comfort Cooling at Patanjali Yogpith Trust, Haridwar that runs the ashram, to
install an evaporative cooling system in Yoga Hall.
Do visit us at ACREX 2013 during March 7-9, at Bombay Exhibition Centre,
Mumbai.
We express gratitude to our patrons, authors and well wishers who besides
providing overwhelming support are our partners on a long way.
Please do send your comments at pravita@charypublications.in
Pravita Iyer
Publisher & Director
4 January 2013
Publisher's Note.indd 4 1/16/2013 5:25:55 PM

6. C ONTENTS Vol 8 • No 10, January 2013
Energy Saving Opportunities in a Telecom industry to reduce
CO2 emission
Telecom operations encompass two major components. The first one is the data
centre and the second one is the transmission centre. In both operations,
computers and servers play the major role. Air conditioners are used to maintain
the inside working environment, and transformer, UPS, capacitors and other switch
gears are used to maintain & regulate the electricity supply. 22
Green Building & Renewables
Green building practices aim to reduce the environmental impact of buildings, so
the very first rule is: the greenest building is the building that doesn't get built. New
construction almost always degrades a building site, so not- building is preferable
to building. The second rule is: every building should be as small as possible. The
third rule is: do not contribute to sprawl (the tendency for cities to spread out in a
disordered fashion). No matter how much grass you put on your roof, no matter
how many energy-efficient windows, etc., you use, if you contribute to sprawl, you
26 have just defeated your purpose. Urban infill sites are preferable to suburban
"Greenfield" sites.
Articles
A Brief Guide to HVAC Project Pre-planning
Developments over the last decade in HVAC (Heating ventilation and Air
conditioning) industry are phenomenal. There are far more advanced, energy
efficient and Green products available in market today for industrial as well as
domestic applications.
30
Multi-effect Solar Absorption Chiller
The world has seen tremendous growth over the last decade and energy
requirements have soared consequently. It is no secret that the scarce energy
sources are depleting fast and therefore the increased demand is putting a thrust
on the prices of available energy sources, especially fossil fuel. It is only a matter
of time when the world will have to resort on to new energy alternatives. At the
same time, environmental concerns are gaining importance not only in theory but
practice. Thankfully, we have an unlimited source of energy, our Sun. Though there
38 are developments in other alternative energy options as well, solar energy looks to
be most promising and sustainable solution to our future needs.
Water Demand in Commercial Building
by AC System and Methodology for its reduction
The need to conserve water, its high scarcity and undependable supply in many
parts of the country has made MEP design engineers study each new building
project carefully to evaluate the possibility of maximum water savings. All the
Municipality norms, Eco Housing and green building guide lines also gives higher
priority to water efficient Building service features.
44
6 January 2013
Contents.indd 6 1/16/2013 5:54:34 PM

8. FOCUS ON
Cooling Technology, Green Building
and Renewable, Cooling Storage
... at a Glance
and Water Management
Large Manufacturers of HVAC Products
48 Comfort Cooling for 200,000 sq ft Yoga Hall
Baba Ramdev’s ashram in Hardwar called
need to come together and start School
for HVAC Equipment
........................ 56
Patanjali Yogpith is the spiritual destination
of large numbers of Indian and foreign
devotees. The Yoga Hall, where thousands
of people practice YOGA in the presence Direct Structure Cooling
of celebrated Yoga Guru – Baba Ramdev, - An Analysis
is a mammoth hall with an area of 200,000
sq ft, large enough to accommodate
........................ 58
30,000 persons. It is 115 meters wide, 165
meters long and 13 meters high.
Cooling Storage System for Load end
energy management
54 Wastewater Management
in Commercial Buildings
........................ 72
With rising urbanization & industrialization,
growing population & improving standard
of living, water demand & consumption is
Cooling of Electronics using Phase
increasing at a rapid rate. To add to it, the
fresh water supplies are themselves limited
by the nature and at the same time,
Change Materials
........................ 80
drought, depleting water table and
aquifers, deforestation, climate change
and pollution have disturbed the availability Feature_ Cost effective thermal insulation
patterns of potable water. solutions from The Supreme Industries
........................ 85
42 DEPARTMENTS
Lti Ventilatoren
'To be the first three ventilation PUBLISHER’S LETTER..................................................................... 04
product supplier in Indian
subcontinent' EDITORIAL......................................................................................10
Interviews
Gaurav Vasudev, NEWSLINE...................................................................................... 12
Country Head
COMPANY PROFILE........................................................................84
PRODUCT REVIEW..........................................................................86
50 IAI COLD CHAIN EXPO 2012...........................................................91
PRODUCT PROFILE.........................................................................98
The Supreme Industries Ltd
'Manufacturing unit in four PRODUCT FEATURE......................................................................100
locations'
INDEX TO ADVERTISERS...............................................................101
Atul Khanna,
General Manager COOLING MUSEUM......................................................................102
8 January 2013
Contents.indd 8 1/16/2013 5:54:38 PM

10. E
Editorial
Editorial
E ditorial
Publisher
Pravita Iyer
pravita@charypublications.in
Design & Production
Green Buildings for Sustainable Environment Sandeep Amte
Sachin Parbalkar
I
ndian Green Building Council aims to facilitate India to be one of the Editorial Co-ordinator
global leaders in sustainable built environment by 2025. And, for this to Nafisa Kaisar
happen Infrastructure development is expected to grow continuously. Accounts Department
Buildings are major consumers of energy, hence construction industry Dattakumar Barge
needs to promote in developing sustainable building technologies, Tejashree Zimal
incorporating the green building concept. The benefits of green buildings Advertising Department
include 20-30% energy savings and 30-50% water savings and this boosts Karan Singh
karan@coolingindia.in
marketability of the projects. Other benefits include day lighting utilization
to the maximum, good indoor environmental quality, material selection, and Subscription Department
Hemant Yelave
optimum utilization of natural resources. Deepali Chavan
Nafisa Khan
Green Building market is growing at a rate of 30-35% per year. Presently,
Editorial, Subscription &
there are about 1,745 eco-friendly building projects with over Advertisement Office
1.21 billion sq ft registered with the IGBC, which expects building footprint 311-312, Raikar Chambers, Govandi (E),
Mumbai 400 088.
of about 2 billion sq ft by 2015. Also, it is estimated that by 2015, the market Tel. : 4017 3300 / 4017 3333
potential for green building products and technologies in India will be about Fax : 022 - 4017 3301
$100 billion. In this direction, Ministry of New and Renewable Energy in Europe Office
association with The Energy and Resources Institute developed the GRIHA Jan Van Ophemstraat 1 Bus 2
3200 Aarschot, Belgium.
rating system to promote the green building concept. The system rates Preety Malik +32 483 310450
buildings on a 1-5 star scale, with 5 stars signifying the most energy-efficient Jacques Vriamont +32 477 945293
Email: eusales@charypublications.in
green buildings.
Rs. 70/- Per Copy
Rs. 800/- Annual Subscription
IGBC has licensed LEED Green Building Standard from the U.S. Green
Building Council. Tamil Nadu Government in consonance with plans to build Disclaimer: Chary Publications does
not take responsibility for claims made
solar powered green houses for rural poor, allotted Rs 1,080 Crore for by advertisers relating to ownership,
patents, and use of trademarks,
construction of 60,000 houses. Green building movement in India was copyrights and such other rights. While
sparked by the first Platinum Green Building in India; CII-Sohrabji Godrej all efforts have been made to ensure
the accuracy of the information in this
Green Business Centre in Hyderabad as per the LEED Rating system that magazine, opinions expressed and
put India on the global map of green building movement. IGBC Green images are those of the authors, and
do not necessarily reflect the views/
Homes Rating System is designed for rating new residential buildings such collection of the owner, publisher, editor
or the editorial team. Chary Publications
as individual homes, existing residential buildings which retrofit and shall not be held responsible/ liable for
redesigned and high rise apartments in accordance with IGBC criteria. any consequences; in the event, such
claims are found - not to be true. All
objections, disputes, differences, claims
Green building movements certainly progress with government initiatives to and proceedings are subject to Mumbai
jurisdiction only.
encourage sustainability in the society. The exclusive planning, technology
Printed by Pravita Iyer and Published
and design creativity will obviously ensure the efficient use of resources by Pravita Iyer on behalf of Chary
and energy, lowers environmental impact of building, overcomes the Publications Pvt Ltd., and Printed
at Print Tech, C-18, Royal Industrial
challenge of climate change, improves employees productivity and Estate, Naigaum Cross Road, Wadala,
contributes to better quality of life. Mumbai 400 031 and Published at 312,
Raikar Chambers, Govandi (East),
Mumbai 400 088.
Gopal Krishna Anand Editor: Gopal Krishna Anand
10 January 2013
Editorial.indd 10 1/16/2013 5:29:33 PM

12. News
Alfa Laval acquires Danfoss acquires full ownership of Danfoss Turbocor
leading provider of niche Compressors
heat transfer products
D anfoss acquired full ownership of the joint
venture company Danfoss Turbocor
A world leader in heat transfer,
centrifugal separation and fluid
handling – has acquired the
Compressors, in which Danfoss has had a 50
percent owner’s share since 2004. The company
develops, produces and markets high efficiency
US-based company Air Cooled
variable speed compressors in the capacity range of 75-200 ton per unit which
Exchangers, LLC (ACE), a leading
are primarily used in very large commercial air-conditioning applications.
manufacturer of custom-engineered
Ricardo Schneider, CEO, Danfoss Turbocor Compressors commented, “We
air-cooled heat exchangers, used to
believe that Danfoss is the ideal single owner of this business because Danfoss
cool air, natural gas, oil and water in
is a global compressor manufacturer, a well-respected leader in our industry
the natural gas market as well as
and committed to the long- term success of our business and our customers’
other energy-related end markets.
businesses. Danfoss Turbocor is a strong link in the Danfoss strategy to
Lars Renström, President and CEO
differentiate by innovation with variable speed high efficiency compressors. We
of the Alfa Laval Group, comments,
are delighted to become 100 percent part of Danfoss, which will support
“The acquisition of ACE brings a new
Danfoss Turbocor in executing our ambitious plans”. Danfoss Commercial
product range into our heat transfer
Compressors already has a strong position in the market for residential and
offering, at a time when demand for
commercial compressors, where the Danfoss inverter scroll compressor range
air-cooled heat exchangers is
is used in applications including rooftops, data centers, chillers, VRF. Acquisition
accelerating - especially in the
of Danfoss Turbocor is set to secure company’s leading position in variable
natural gas industry. Together, Alfa
speed compressor technology and thereby give the Danfoss Group decisive
Laval’s overall position is further
strategic advantages in the global air-conditioning and refrigeration market.
strengthened, and we’re even better
According to Arup Majumdar, VP marketing, strategy & inverter scrolls of
positioned to serve the energy-
Danfoss Commercial Compressors, the development of large capacity variable
related industries.” ACE is expected
speed compressors addresses a global demand for more energy- efficient
to generate sales of approximately
solutions for cooling and heating.
SEK 350 million in 2012, with
profitability well above the average
for the Alfa Laval Group. The intention Trane Interactive Solutions: range of interactive Split Air
is to integrate Air Cooled Exchangers, Conditioners and interactive Electronic Lock
LLC into Alfa Laval’s Energy &
Environment segment, within the
Process Technology division. The I ngersoll Rand has recently ventured into the Indian
market with “Trane Interactive Solutions” which offer
the range of interactive Split Air Conditioners and
company was acquired on
December 31, 2012. interactive Electronic Lock, targeted towards the
premium segment. The products can interact with
Mitsubishi Electric shows each other through a new generation wireless
what Renewables can technology called Zig Bee, allowing two-way
Achieve communications between multiple devices and a single controller. Trane
interactive controller, therefore allows the consumer to control the Trane
M itsubishi Electric is using its
presence at Ecobuild (ExCel,
London, March 5–7) to highlight real
interactive AC and the interactive Lock together, without having to be in their
direct line of sight. India is the first market, outside of the US market, for
Ingersoll Rand to launch the brand “Trane”. Powered with Zig Bee technology,
world building projects that are using Trane interactive solutions are one of its kind solutions for any market in the
existing renewable technologies to world. These devices are also a first in the home automation segment, where
improve energy performance and the AC and the lock interact with each other and can be controlled with a single
lower both carbon emissions and in interactive controller. The products bring in simpler yet technologically evolved
many cases, energy bills. The levels of interactivity, control, customization and operation for modern living.
company’s stand details the They create home environments which promise new levels of comfort, efficiency
improvements made in both new and security. The wireless protocols and technologies used in these products
build and retro-fit projects in domestic essentially use very low power and are very reliable. These are also very safe
and commercial settings, through and simple to use. The Trane 3 star 1.0 ton AC is priced at Rs 37,000, 1.5 ton at
energy saving equipment and 42,000; and the 5 star 1.0 tons would cost Rs 42,300 and 1.5 ton Rs 52,500. The
renewable technology such as the main door electronic mortise lock is priced at Rs 24,500. The Trane Interactive
award-winning Ecodan air source products are aimed at providing high degree of convenience, comfort and
heat pump. control that one always needs and make everyday living simple & intuitive.
12 January 2013
Newslines.indd 12 1/16/2013 6:26:00 PM

14. News
Emerson Climate Sea Trials proving Value of Carrier Transicold’s Efficient
Technologies launches NaturaLINE Natural Refrigerant Container System
HVAC Check & Charge Carrier Transicold reports smooth sailing for its new
E merson Climate Technologies,
Inc., a business of Emerson has
launched a new mobile application
NaturaLINE unit, the world’s first natural refrigerant
container refrigeration system, which has been
successfully navigating a rigorous sea trial program
designed to help HVAC contractors throughout 2012. Carrier Transicold helps improve global transport and
upgrade their old sliding cardboard shipping temperature control with a complete line of equipment for refrigerated
refrigerant charge calculators. The trucks, trailers and containers, and is a part of UTC Climate, Controls & Security,
new HVAC Check & Charge provides a unit of United Technologies Corp. The NaturaLINE units have been performing
an on-site refrigerant charge at predicted levels during sea trials, proving the practicality of a natural
calculator for air conditioning refrigerant-based system for high-efficiency marine applications. To date,
applications. The application allows NaturaLINE sea trial units have logged hundreds of thousands of nautical miles
contractors to easily calculate correct and tens of thousands of service hours for customers, successfully delivering a
system refrigerant charge for R-22 or wide spectrum of products, including Caribbean-grown bananas, Belgian beer,
R-410A. Contractors can simply European wines, cookie dough, ice cream, meats and cheeses. The units have
choose subcooling, superheat, or been operating over temperature set points ranging from -22 degrees Celsius
airflow and enter the specified to 13 degrees Celsius on Atlantic and Pacific routes ranging from four to 29
system temperatures along with the days. More sea trial units will be deployed over the next several months. Using
latent and sensible environmental carbon dioxide as its refrigerant, the NaturaLINE unit can help alleviate container
loads. These values are then used to shipping industry concerns about the use of conventional synthetic refrigerants,
determine the proper system charge which have higher global warming potential (GWP). Combined with its
and whether the charge amount outstanding energy efficiency, the NaturaLINE unit is proving itself to be the
needs to be altered based on these most environmentally sound alternative available for overseas shipping of
conditions. frozen and refrigerated goods. It also has been validated by UL Environment as
having a 95 percent recyclability rate, joining Carrier’s PrimeLINE unit as the
ASHRAE seeks Input on only container refrigeration units to achieve recyclability validation.
Revisions to Data Centers
in 90.1 Energy Standard Glass industry releases new evidences of glazing benefits
E nergy Standard for Buildings
Except Low-Rise Residential
to sustainable buildings
Buildings, is open for advisory public
review from Jan. 4-Feb. 3, 2013. The G lass for Europe releases new
evidences of glazing benefits to
sustainable buildings. The latter were
addendum proposes changes to
definitions for computer rooms and gathered by David Strong Consulting in
data centers in Standard 90.1 to a recent study on the distinctive benefits of glazing, which highlights the
create a distinction between facilities socio-economic contributions of glazed areas to sustainability in the built
covered by 90.1 and those which are environment. “Getting daylight into buildings is a key element of sustainable
intended to be under the scope of building design. It not only saves energy but it greatly enhances the health,
ASHRAE Standard 90.4P Energy , happiness and well-being of occupants”, explained David Strong after
Standard for Data Centers and having analysed the positive impact of daylight in healthcare, educational
Telecommunications Buildings, buildings, workplace, retails buildings and living places. “Glass is unique
proposed by ASHRAE in late 2012. among building materials because of its ability to transmit daylight and
The definition proposed for computer sunlight and to provide a view to the outside world. Therefore, glass
rooms more closely aligns with influences the interior quality of buildings in many more ways than does any
ASHRAE Standard 100, Energy other construction material” said Rick Wilberforce, Chairman of the External
Efficiency in Existing Buildings, and Relations Committee of Glass for Europe. At a time when focus on
the U.S. Energy Information sustainable building design is growing, Glass for Europe firmly believes that
Administration’s Commercial Building policy-makers and architects need to be aware of the socio-economic
Energy Consumption Survey aspects of sustainability linked to the provision of daylight into buildings and
(CBECS). In addition, the definition is its benefits to occupants as a way to ensure that new buildings are truly
consistent with Uptime Institutes’ “Tier sustainable. “The incredible advances in glass making technologies in the
Standard: Topology” and the last quarter of a century have given architects a whole pallet of products,
Telecommunications Industry which can be net contributors of energy to buildings. It means architects
Association ANSI/TIA-942 class rating now have freedom of design in the amount of glazing in the facades that was
for low-risk Tier I data centers. never previously possible”, added Rick Wilberforce.
14 January 2013
Newslines.indd 14 1/16/2013 6:26:02 PM

16. News
ACREX India 2013 Eaton-Williams targets energy efficiencies at Data Centre
March 7-9, Mumbai World 2013
T he theme "Dedicated to an eco-
friendly environment" of ACREX
India 2013 offers a perfect platform
E aton-Williams is a recognised solutions provider when it comes
to reducing energy usage. Its award winning products deliver
an integrated, efficient and reliable approach to managing heat in
for Air Conditioning, Refrigeration datacentres. With a focus on energy efficient cooling solutions
and allied Building Services such as Eaton-Williams exhibits at Data Centre World 2013 will include a
Electrical, Lighting, Plumbing and range of Rear Door Heat Exchangers capable of delivering up to
Water Treatment, Fire and Safety, 55kW of cooling with 100% heat rejection at source; the CD6
Automation and Fenestration, to cooling distribution unit that can be connected up to 12 rear door
showcase technologically heat exchangers and deliver up to 260kW of cooling; and the new
innovative, Environmental Friendly FleXaire close control system. FleXaire delivers precision air control
& Energy saving and sustainable in data centres and any other environment where temperature
products & services to meet the control is critical. Efficient use of humidification technology in data
ever growing, demanding market of centres can help reduce static electrical discharges that can damage servers and
India. The 14th edition of ACREX IT equipment. Installing VapaWall in an air handling unit can provide efficient and
India to be held from March 7-9, effective humidity control with the benefit of free cooling, depending on the
2013 at Mumbai organized by Indian application. Floor grilles can determine the effectiveness of air distribution in data
Society of Heating, Refrigerating centres. Colman's fan assisted floor grille tackles hot spots by delivering cool air to
and Air Conditioning Engineers the rack where it is most needed. It replaces standard 600mm x 600mm floor tiles
(ISHRAE) with the professional and is fitted with a 230V supply as standard, offering simple plug and play
expertise of UBM India, aims to connectivity. Eaton-Williams Service (EWS) will be advising on maximising
surpass the expectations of the efficiencies of HVAC equipment. Savings of 20% or more can be achieved using its
previous shows and set new diagnostics and optimising tool kit as part of a comprehensive maintenance
precedents and standards for all programme. Eaton-Williams, a global, diversified company whose many market-
such future Exhibitions. Concurrent leading brands deliver broad capabilities and a wide array of innovative, technology-
Workshops, Seminars and driven products and solutions for lifestyle improvement at home and at work.
Interactive Panel Discussions
ACREX India 2013, while providing
the right platform for companies to GEA Refrigeration North America to introduce Bock piston
showcase their products, will also compressors
be a very educative and informative
event with series of technical
workshops, seminars and interactive G EA Refrigeration Technologies will introduce its GEA
Bock piston compressors to the United States and
Canadian markets at the 2013 AHR Expo, Jan. 28 – 30, in
panel discussions held concurrently
with the exhibition. Dallas. With this addition, GEA Refrigeration North America
can now offer piston and screw compressors from 5 to 6100
Systemair increases CFM using various refrigerants including R-134a, R-404a,
ownership in HSK, Turkey CO2, NH3 and others. GEA Bock’s diverse offering from 5 to
approximately 200 CFM is ideal for various applications in
S ystemair AB acquired 70 percent
of the shares of the Turkish
company HSK, the Turkey's leading
the cooling and refrigeration industry. GEA Bock compressors
can be found in bus and train cooling systems, refrigerated transport vehicles,
manufacturer of air handling units. supermarket refrigeration systems, comfort air conditioning and marine
Systemair acquired a further 20 refrigeration applications, to name a few. GEA Bock compressors are
percent of the shares in HSK on manufactured in Germany and will be sold in the United States and Canada
December 21. "We are pleased for the through GEA Refrigeration North America, Inc. GEA Bock compressors such as
opportunity to increase our ownership this GEA Bock F18 model, offer displacements up to approximately 200 CFM.
and that the founding family will They are now available in the USA and Canada. GEA Group Aktiengesellschaft,
remain with 10 percent ownership in one of the largest suppliers of process technology and components for the food
order to maintain continuity and to and energy industries, achieved consolidated revenues in excess of EUR 5.4
participate in the continued billion in 2011. Dr Helmut Schmale, CFO of GEA Group, estimated the group’s
expansion" says Gerald Engström, order intake for fiscal year 2012, subject to the final audit, to be approximately
Systemair's President and CEO. The EUR 5.9 billion at an investor conference in New York on January 15, 2013. This
business has changed its name to represents a year-on-year increase of 5 percent and is thus in line with
Systemair-HSK and a merger with expectations. GEA will issue preliminary key figures for fiscal 2012 and the
Systemair's previous sales company outlook for 2013 at the annual financial press conference in Düsseldorf on
in Turkey has begun. February 6, 2013.
16 January 2013
Newslines.indd 16 1/16/2013 6:26:04 PM

18. News
High Performance Building Solutions drive Efficiency and
CSR Activity of Shravan Engg
Savings for Unique Needs of Financial Institutions
D Jayakuamar (Ramesh), MD of
Shravan Engineering Enterprises
Pvt Ltd, is one of the trustees of F inancial institutions handle critical data every day,
data that requires specialized environments to
Swami Vivekananda Rural Community ensure that information is processed without interruption.
College (SVRCC), Tamil Nadu. SVRCC If a data center goes down for even 15 minutes, an
is a four-year old community college organization could lose millions of dollars in information. Data centers have
founded and managed by Sadguru Sri significant and specialized cooling needs in order to handle the heat loads
Gnanananda Seva Trust, associated with computational processes. Hot spots and inadequate cooling can
Keezhputhupattu village near cause costly disruptions and are daily concerns. Mission critical operations are
Puducherry. The college is offering happening at financial institutions 24/7, with increased demands on thermal
One year full time Diploma course in management, airflow, cooling and humidity control. Reliable, efficient and capable
Refrigeration & Air conditioning heating, ventilation and air conditioning (HVAC) systems are critical to achieving
Mechanism. Every year about 25 optimal performance. Server density continues to increase to meet the demands
students are completing the Course of global organizations and their data storage requirements. The Department of
and placed in various companies in Energy estimates that cooling and humidification control accounts for 40 to 60
the RAC industry. The courses are percent of a data center’s physical operating costs, making efficiency a primary
recognised by the Tamil Nadu Open concern. Financial institutions and data centers are growing and consolidating
University. For the last two years some rapidly and depend on uninterrupted operations to move at the speed of the
of the students are awarded Gold global economy. By taking a systems approach, Trane helps financial institutions
Medal for their best performance by understand how the requirements of financial data processing impact building
the University. The College is selected performance as well as how to manage downtime and keep systems running
as model community college and 24/7. By tying all of the building systems together, Trane can help financial
every year teachers & beginners from institutions increase their efficiency while saving dollars. Systems like the Tracer
various parts of India and abroad are XT help data centers manage risk. By combining building controls system with
sent for training to SRVCC, Pondicherry. GE Intelligent Platforms’ Proficy Software platform, building operators can
Our Industry can approach the College visualize, analyze, model, monitor and diagnose systems.
for selecting right candidate with best
attitude for placement in their
organisation & get benefitted. Free ASHRAE Session at AHR Expo focuses on Acoustics
Buildings Directive:
Member States miss to
D esigning HVAC systems with good acoustic performance
can be a challenge, Miller-Klein said. “This session
addresses three common issues to improve acumen for
stimulate the economy sound and vibration, including the idiosyncrasies of selecting
fans that optimize acoustic and energy performance for
T he multiple benefits of investing in
energy efficient new and existing
buildings, generates govt. income
improved system design and the physics of sound that
explains the performance and limitations of silencers and acoustic louvers.” The
through increased economic activity 2013 Winter Conference runs Jan. 26-30 at the Sheraton Dallas. The International
and creation of local jobs. Moreover, it Air-Conditioning, Heating, Refrigerating Expo, held in conjunction with the Winter
makes buildings future-proof, reduces Conference, runs Jan. 28-30 at the Dallas Convention Center. The noise produced
energy bills and lowers CO2 emissions by a fan depends not only on its duty point but also on its type and size. For a
& EU’s dependency on fossil fuel given duty point a fan that is the wrong type and/or the wrong size can be as
imports. Still 19 Member States have much as 30 dB louder than the optimum selection. This presentation will show
not fully implemented Energy examples of quiet and noisy fan selections and offer simple guidelines for
Performance of Buildings Directive selecting fans to minimize excessive fan noise. HVAC silencers or sound
adopted in 2002 & recast in 2010. attenuators are used on many different types of HVAC equipment. Silencer
Commission launched infringement manufacturers have various models designed to meet specific dynamic insertion
procedures for non-communication in loss and static pressure drop requirements. A properly selected silencer can
Sept. 2012 against 24 Member States reduce noise levels significantly across the entire frequency spectrum. However,
that did not declare full transposition if a silencer is improperly selected, issues in acoustic performance, pressure drop
at that time. Since then, four more and self-noise may arise. The silencer itself may even become another noise
countries sent their notification of source! This presentation will explain silencer definitions, testing procedures and
transposition. Eight countries have how to properly select silencers to ensure the maximum performance is gained
not submitted any declaration while without disrupting the HVAC system. Understanding how noise can be an
eleven others have partially annoyance and what the goal criteria sounds like gives you, the designer and
implemented the directive. contractor the tools to be successful on the acoustic front.
18 January 2013
Newslines.indd 18 1/16/2013 6:26:11 PM

20. News
Emerson Climate Technologies releases a List of the Top
GEA Refrigeration
10 States to work in HVACR
Technologies at Chillventa
Rossija
H VACR contractors looking for plentiful job opportunities,
should head for the Golden Coast or the Buckeye State,
G EA Refrigeration Technologies
will present its optimized,
energy-efficient GEA Bock
according to a list of top states to work in HVACR complied
by Emerson Climate Technologies, a business segment of
Emerson. One of the key challenges facing the HVACR
compressors at Moscow's industry is a shortage of qualified technicians. Emerson created the list after
Chillventa Rossija (February 5–7, talking to contractors and HVACR students and instructors about what motivates
2013). These innovative products young people to pursue careers in this industry. According to Air Conditioning,
are fully in line with motto of Heating and Refrigeration Institute (AHRI), an estimated additional 57,000 skilled
the trade fair: “Environmental workers are needed each year to work in the HVACR industry. Bob Labbett, Vice
Protection and Energy Efficiency.” President, Marketing, Distribution Services, Emerson Climate Technologies said,
The new 8-cylinder GEA Bock F18 “This list is an interesting way to draw attention to the important issue facing our
and the GEA Bock HG88e will be industry-recruiting talented people from across the country to take the place of an
on display. New GEA Bock aging workforce.” Emerson’s top 10 ranking draws on HVACR salary and
mexxFlow valve system will be employment data from the U.S. Department of Labor; trade school locations
employed for the first time in the recognized by the Partnership for Air-Conditioning, Heating, Refrigeration
new F18 compressor. This system Accreditation; heating and cooling degree days calculated at DegreeDays.net;
introduces a double ring fin design residential home values from the U.S. Census, and certified contractors by state
for the valve plate with perfected from North American Technician Excellence (NATE). Emerson Climate
flow technology, in combination Technologies Top 10 States to Work in HVACR are California, Ohio, Florida, Texas,
with a cylinder head especially Illinois, New York, Pennsylvania, New Jersey, North Carolina and Georgia. “Illinois
designed and fitted to the is a great state to work in the HVAC/R trade. Commercial refrigeration service is
valve plate. GEA has improved in high demand due to all the businesses related to food service and the
efficiency over compressors restaurants in the Chicago area. We stay busy year round thanks to Chicago's
with conventional valve plate extreme weather conditions,” said Mitch Byrne of Northeast Cooling LLC.
technology by about 15 per cent.
This means that F18 achieves new
levels of efficiency ratings for this UK-GBC member homebuilders demonstrate consistent
compressor type. improvement in sustainability performance
Integrating Boiler/Burner
Controls into Building A ccording to the results of the 2012
NextGeneration benchmark, The Berkeley
Group is the UK’s most sustainable
Management Systems homebuilder, with Crest Nicholson maintaining
last year’s second position. The
B ryan Steam LLC introduces its
new Universal Communication
Gateway, an external, high
NextGeneration benchmark annually ranks
the top 25 UK homebuilders’ performance in
performance, low cost building delivering sustainable homes and brings together homebuilders with
automation multi-protocol gateway government, investors, industry experts and leaders to share best practice
for integrating boiler/burner controls in sustainability. The comprehensive benchmark exercise takes over six
into building management systems. months to complete and assesses those developers responsible for
This gateway is preprogrammed to constructing over 60% of new homes in the UK each year with a combined
support BACnet, Metasys, LonWorks construction value of £5 billion. Homebuilders are assessed based on their
and Modbus protocols. No own sustainability performance as a company, including Governance and
additional software, downloads or Risk Management and the amount of energy consumed in their offices and
programming required at the job onsite, as well as the sustainability of the homes and communities they
site and common data points create. Paul King, UK Green Building Council CEO, commented: "It's great
are preconfigured at the factory. to see the latest NextGen benchmarking study of house-builders
Everything is included within a 10” x launched today. In times when industry leadership on sustainability is more
12” x 6” NEMA Type 1 control panel important than ever, the report highlights the progress of our leading
with connections for 120 Vac and house-builders who have taken some great strides over recent years, and
device communication cable. The who recognise that sustainability is inseparable from good quality and
gateway also offers bi-directional customer satisfaction. Congratulations to Berkeley who have come top
data flow between devices on once again, but also to all the developers for taking part and continuing to
selected points. raise the bar."
20 January 2013
Newslines.indd 20 1/15/2013 2:54:13 PM

22. Case Study
Energy Saving
Opportunities Telecom operations encompass two major
components. The first one is the data centre
in a Telecom and the second one is the transmission centre.
In both operations, computers and servers
industry to play the major role. Air conditioners are used
to maintain the inside working environment,
reduce CO2 and transformer, UPS, capacitors and other
switch gears are used to maintain & regulate
emission the electricity supply.
A Case Study
T
he power consumption of the main campus has three buildings housing customer
telecom equipment are in watt and service centre, two GSM Data centre and these
the power consumption by utilities buildings are supplied with 11 KV HT supply through a
are in kilo-watt. In most cases a 500 kVA transformer and the standard operating
scientific approach is missing to identify voltage is 415 V. Engineering services and Ware house
energy saving measures. Therefore, a close are in a single compound and electricity is supplied
look at these utilities is inevitable in the through LT connection. The other two transmission
present scenario of acute energy shortage. centers receive supply through a HT line having
An energy audit conducted in a telecom separate connection through a 200 kVA and 315 kVA
company showed electricity saving transformers. The major load connected in all the
potential of 178.456 MWh per annum & buildings are air conditioners and lighting. The energy
the estimated CO2 emission saving is distribution in main campus is shown in Table 1.
192.73 tonn per annum. The main campus has almost 90% of the electrical
The company is located in an African load is of non IT equipments mainly air conditioners
Island and the spectrum of services and lighting. Therefore the energy audit was focused
provided, covers Fixed line telephony, to identify opportunities to reduce energy consumed
GSM mobile, Plug and Play Internet, by non-IT equipment. The non-IT load distribution in
Broadband, Mobile Data Services and the main campus is shown in Table 2. The distribution
Value Added services. Another specialized shows that the air conditioners contribute nearly
area of the company’s service spectrum 78% of the utility load and then lighting. In this
is remote location based services for article we present the energy saving opportunities
sectors like shipping. The company has identified in air conditioners.
administrative building, technical
engineering centre, commercial centre Mathematical Models
for customer service, GSM Data centre, To generalise the analysis so that similar industries
two transmission centers and one ware can adopt the same methodology, the following
house. The major utilities installed are mathematical equations were used in the energy
Transformers, HVAC and lighting. The performance analysis:
22 January 2013
Energy Saving Opportunities in a Telecom industry to reduce CO2 emission.indd 22 1/14/2013 12:40:32 PM

23. Case Study
Category Telecom house % (20 hrs per day considered in this calculated at 2.65 and the standard
(Main Campus) Share report) value is 2.00. The Data Centre
IT equipment 19.63 10.45 Dy = No of days in the year ‘y’. (300 Infrastructure Efficiency (DCIE) is
Loads days for office and 365 days for data calculated at 38% and the standard
Non IT 168.25 89.55 centre). value is 50%. It shows that there
equipments Annual Energy Saving exists significant scope to improve
Total 187.88 100 AES = PEC - EEC the data centre efficiency by
Where: introducing energy efficient servers,
Table 1: Energy distribution in
main campus AES = Annual energy saving resizing of HVAC systems and proper
PEC = Present Energy consumption designing of UPS systems.
Category kW % share EEC = Expected Energy Consumption
Lighting 21.3 10.95 after implementing energy saving Study on HVAC system
IT Equipments 22.07 11.35 measures A detailed measurement was
Air conditioners 151.15 77.70
Annual Cost Saving in SR taken in all air conditioner which
ACS = AES ) CE were working during the study
Total 194.52 100.00
Where, period. The various electrical
Table 2: Non-IT load distribution in Main
ACS = Annual Cost Saving in INR parameters measured in few selected
campus of the company
AES = Annual Energy Saving in kWh. air conditioners are listed in Table 3.
Power Usage Effectiveness (PUE) CE = Cost of Energy in INR/kWh
PUE is defined as the ratio of the (the cost of energy is considered as Recommendations
total power to run the data center SR 4.00 in this report). It is observed from Table 3 that
facility to the total power drawn by Return on Investment (ROI) the packaged air conditioners
all IT equipment. installed are working at its full load.
ROI = C b + Tr + Tax + IC These Air conditioner are more than
PUE = Total Facility Power/ where, ACS 10 years old and it has single
IT Equipment Power
I = Investment in SR compressor of 55 HP each (41 kW).
Standard Good Better Cb = Basic Cost of the equipment The inside temperature at data
2.0 1.4 1.1 Tr = Cost of Transportation centre was measured at 22. These
Tax = Govt. Tax & Duty Air conditioner could be replaced
An average data center has a IC = Installation and commissioning with variable refrigerant Flow (VRF)
PUE of 2.0; however, several recent cost split air conditioners of 25 HP each
super-efficient data centers have ACS = Annual cost saving. (18.5kW*2). The new air conditioners
been known to achieve a PUE as low The basic cost of system/ will have intelligent controllers to
as 1.1. equipment is considered in this ensure optimum use of the
Data Centre Infrastructure Efficiency study. compressor as per data centre
(DCIE) Estimation of CO2 emission internal environment. The new
It is defined as the ratio of the The corresponding CO2 emission energy efficient air conditioners will
total power drawn by all IT is estimated using the eqn.(4) have an energy efficiency ratio (EER)
equipment to the total power to run n >9. The estimated energy saving
the data center facility, or the inverse CO2 Emission = / ESi * EF would be 20%. Therefore the energy
of the PUE: i= 1 saving by replacing the existing
Where, ESi energy source i packaged air conditioner with new
DCiE = 1/ PUE = IT/ Equipment Power Total
electricity or fuel wood/Briquette energy efficient Variable Refrigerant
Facility Power
and EF is Emission Factor for the fuel Flow (VRF) Air conditioners having
Standard Good Better type. EFe = 1.08 tCO2/ MWh. For split compressors would be 87600
0.50 0.70 0.9 diesel based power generation the kWh/annum. The cost reduction
emission factor is 0.85 tCO2/ MWh would be INR 14.72 lakh per annum.
Energy consumed by HVAC systems EFe is emission factor for electricity The approximate cost of new air
AECac = / ac = 1 n ) kWac ) h d ) D y
n use. (Source: Central Electricity
Authority, Govt. of India).
conditioner would be INR 10.5 lakhs
for two units. The ROI would be 9
Where, months.
AECac = Annual Energy consumption Energy Performance Analysis The other split air conditioners
by HVAC system It is observed from Table 2 that are of 24000 BTU and are operated
n = Number of HVAC systems power consumption is maximum for with single phase supply. Those air
kWac = Active power consumed by air conditioners at 78% followed by conditioners installed in 2009 which
each HVAC system IT equipment and Lighting. The are less than five years old are
hd = No of hours operation per day Power Usage Effectiveness (PUE) is working in good condition. The other
January 2013 23
Energy Saving Opportunities in a Telecom industry to reduce CO2 emission.indd 23 1/14/2013 12:40:34 PM

24. Case Study
saving along with economic benefits
Location A (A) Pf (a) kVA (T) kW (T)
by replacing old air conditioner for
Main campus Packaged Air conditioners-1, 67.40 0.58 79.89 45.9 presented in Table 4.
Make: ACSON, 144000 BTU, 3 phase The study shows that air
conditioners are the main
Main campus Packaged. Air conditioner-2, 64.17 0.60 72.64 43.46
Make: ACSON, 144000 BTU, 3 phase contributors for the energy
consumption of telecom Industries.
Main campus, split Air conditioner-1, 7.03 - - 1.55 In the present case the energy
Make: ACSON, 1602 W/24000 BTU, single phase saving potential comes to a tune of
Main campus, split Air conditioner -2, 7.3 - - 1.48 178.456 MWh of the total energy
Make: Carrier, 1602 W/24000 BTU, single phase consumption and the expected CO2
emission is 192.73 tonne per annum.
Table 3: Power measurement in Air conditioners
Therefore installing star rated energy
A-Current in Ampere; pf-Power factor; kVA-Kilovoltampere; kW-Kilowatt; a-Average of all 3φ; T-Total of all 3φ efficient air conditioners with
Variable Refrigerant Flow (VRF) and
air conditioners more than five years measurement made, it is presumed replacing air conditioners which are
old should be replaced with STAR that about 78% of energy (kW) is more than five years old will certainly
rated energy efficient units. Further, consumed by air conditioners. The bring down the energy consumption
in one of the Carrier make air estimated energy consumption and in telecom Industries.
Building Present Air % Reduction Reduction in Cost reduction/ Investment ROI
conditionerconsumption in in kWh/Annum CO2 emission, Annum (INR) (Months)
kWh/Annum (75% of Total) (20%) tonn/annum (INR)
Engineering service centre 12097.56 2419.51 2.61 40852.52 88241.44 25
Main Campus 129874.25 25974.85 28.05 438575.12 1030651.58 28
Office building 740940.00 148188.00 160.04 1251048.04 2652221.84 25
Transmission centre-1 9369.75 1873.95 2.02 31640.91 60434.14 22
Total 892281.57 178456.31 1755299.00 3816724.74 26
Table 4: Energy Savings and economic benefits identified in air conditioners
conditioner the fan runs continuously
irrespective of the compressor ❁
operation and consumes 172 W that Preethiya T is Electronics and Communication Engineer from PTR
leads to power wastage. The College of Engineering and Technology, Madurai and Master of
estimated annual energy loss due to Engineering in Computer and Communication from, PSNA College of
the redundant running of this fan Engineering and Technology, Dindugul. Presently she is working as
for 8 hrs a day comes to 502 kWh Assistant Professor (Gr-II) in the ECE Department of Kalasalingam
per annum. The financial loss is University, Tamilnadu. She has four years teaching experience. Her
estimated at INR 8540 per annum. fields of interest are wireless sensor networks and energy management.
By changing this with new star rated
air conditioner the total redundant Aneesh is bachelor in Electronics and Communication Engineering from
running time of the fan will be Trivandrum University. Presently he is working with Triassic Solutions
eliminated in addition to the 20% Pvt. Ltd as Chief Technical Officer. He has 20 years of industrial
energy saving due to energy efficient experience. His field of interest is developing soft ware, net working and
compressor in the new air conditioner. design of intelligent controllers and energy management.
It is recommended to go for
Variable Refrigerant Flow (VRF) M T Sambandam is Mechanical Engineer from Thiagarajar College of
based air conditioners which reduce Engineering & MTech from School of Energy, Bharathidasan University,
energy consumption by 20%. We Trichirappalli. Presently working as Asst. Professor (Senior Grade) with
suggest replacing all split air Kalasalingam Centre of Excellence for Energy Studies and Research,
conditioners which are more Kalasalingam University. He has 15 years of industrial & 11 years of
than five years old with new teaching experience. He is a certified energy auditor by BEE, Govt. of
generation star rated (VRF) based India & conducted 300 plus energy audits in various types of industries.
air conditioners. As per the
24 January 2013
Energy Saving Opportunities in a Telecom industry to reduce CO2 emission.indd 24 1/14/2013 12:40:35 PM

26. Gree n Building
Green
Building
& Renewables
Reducing environmental impact
Green building practices aim to reduce the environmental impact of buildings, so the very
first rule is: the greenest building is the building that doesn't get built. New construction almost
always degrades a building site, so not- building is preferable to building. The second rule is:
every building should be as small as possible. The third rule is: do not contribute to sprawl (the
tendency for cities to spread out in a disordered fashion). No matter how much grass you put
on your roof, no matter how many energy-efficient windows, etc., you use, if you contribute
to sprawl, you have just defeated your purpose. Urban infill sites are preferable to suburban
"Greenfield" sites.
B
uildings account for a large environmental, economic, and social using packed gravel or permeable
amount of land. According benefits. However, modern concrete instead of conventional
to the National Resources sustainability initiatives call for an concrete or asphalt to enhance
Inventory, approximately integrated and synergistic design to replenishment of ground water.
107 million acres (430,000 km2) of both new construction and in the While the practices, or
land in the United States are retrofitting of existing structures. technologies, employed in green
developed. An International Also known as sustainable design, building are constantly evolving and
publication release estimates that this approach integrates the building may differ from region to region,
existing buildings are responsible for life-cycle with each green practice fundamental principles persist from
more than 40% of the world’s total employed with a design-purpose to which the method is derived: Sitting
primary energy consumption and for create a synergy among the practices and Structure Design Efficiency,
24% of global carbon dioxide used. Energy Efficiency, Water Efficiency,
emissions. Green building brings together a Materials Efficiency, Indoor
vast array of practices, techniques, Environmental Quality Enhancement,
Goals of Green Building and skills to reduce and ultimately Operations and Maintenance
The concept of sustainable eliminate the impacts of buildings on Optimization, and Waste and Toxics
development can be traced to the the environment and human health. Reduction. The essence of green
energy (especially fossil oil) crisis It often emphasizes taking advantage building is an optimization of one or
and the environment pollution of renewable resources, e.g., using more of these principles. Also, with
concern in the 1970s. The green sunlight through passive solar, active the proper synergistic design,
building movement in the U.S. solar, and photovoltaic techniques individual green building technologies
originated from the need and desire and using plants and trees through may work together to produce a
for more energy efficient and green roofs, rain gardens, and greater cumulative effect.
environmentally friendly construction reduction of rainwater run-off. Many On the aesthetic side of green
practices. There are a number of other techniques are used, such as architecture or sustainable design is
motives for building green, including using wood as a building material, or the philosophy of designing a
26 January 2013
Green Building & Renuables.indd 26 1/15/2013 11:48:10 AM

27. building that is in harmony with the state of California also included LCA energy has assumed much greater
Gree n Building
natural features and resources as a voluntary measure in its 2010 importance – and may make up as
surrounding the site. There are draft Green Building Standards much as 30% of the overall life cycle
several key steps in designing Code. energy consumption. Studies such
sustainable buildings: specify 'green' Although LCA is often perceived as the U.S. LCI Database Project
building materials from local sources, as overly complex and time show buildings built primarily with
reduce loads, optimize systems, and consuming for regular use by design wood will have a lower embodied
generate on-site renewable energy. professionals, research organizations energy than those built primarily
such as BRE in the UK and the with brick, concrete or steel.
Life Cycle Assessment (LCA) Athena Sustainable Materials To reduce operating energy use,
A life cycle assessment (LCA) can Institute in North America are designers use details that reduce air
help avoid a narrow outlook on working to make it more accessible. leakage through the building
environmental, social and economic In the UK, the BRE Green Guide envelope (the barrier between
concerns by assessing a full range of to Specifications offers ratings for conditioned and unconditioned
impacts associated with all cradle- 1,500 building materials based on space). They also specify high-
to-grave stages of a process: from LCA. performance windows and extra
extraction of raw materials through In North America, the ATHENA insulation in walls, ceilings, and
materials processing, manufacture, EcoCalculator for Assemblies floors. Another strategy, passive
distribution, use, repair and provides LCA results for several solar building design, is often
maintenance, and disposal or hundred common building assembles implemented in low-energy homes.
recycling. Impacts taken into account based on data generated by its more Designers orient windows and walls
include (among others) embodied complex parent software, the and place awnings, porches, and
energy, global warming potential, ATHENA Impact Estimator for trees to shade windows and roofs
resource use, air pollution, water Buildings. (The EcoCalculator is during the summer while maximizing
pollution, and waste. available free at www.athenasmi. solar gain in the winter. In addition,
In terms of green building, the org.) Athena software tools are effective window placement (day
last few years have seen a shift especially useful early in the design lighting) can provide more natural
away from a prescriptive approach, process when material choices have light and lessen the need for electric
which assumes that certain far-reaching implications for overall lighting during the day. Solar water
prescribed practices are better for environmental impact. They allow heating further reduces energy
the environment, toward the designers to experiment with costs.
scientific evaluation of actual different material mixes to achieve Onsite generation of renewable
performance through LCA. the most effective combination. energy through solar power, wind
Although LCA is widely recognized A more product-oriented tool is power, hydro power, or biomass
as the best way to evaluate the the BEES (Building for Environmental can significantly reduce the
environmental impacts of buildings & Economic Sustainability) software, environmental impact of the building.
(ISO 14040 provides a recognized which combines environmental Power generation is generally the
LCA methodology), it is not yet a measures with economic indicators most expensive feature to add to a
consistent requirement of green to provide a final rating. Particularly building.
building rating systems and codes, useful at the specification and
despite the fact that embodied procurement stage of a project, Water efficiency
energy and other life cycle impacts BEES 4.0 includes data on 230 Reducing water consumption and
are critical to the design products (including generic and protecting water quality are key
of environmentally responsible manufacturer brands) such as siding objectives in sustainable building.
buildings. and sheathing. One critical issue of water
In North America, LCA is consumption is that in many areas,
rewarded to some extent in the Energy efficiency the demands on the supplying
Green Globes rating system, and is Green buildings often include aquifer exceed its ability to replenish
part of the new American National measures to reduce energy itself. To the maximum extent
Standard based on Green Globes, consumption – both the embodied feasible, facilities should increase
ANSI/GBI 01-2010: Green Building energy required to extract, process, their dependence on water that is
Protocol for Commercial Buildings. transport and install building collected, used, purified, and reused
LCA is also included as a pilot credit materials and operating energy to on-site. The protection and
in the LEED system, though a provide services such as heating and conservation of water throughout
decision has not been made as to power for equipment. the life of a building may be
whether it will be incorporated fully As high-performance buildings accomplished by designing for dual
into the next major revision. The use less operating energy, embodied plumbing that recycles water in toilet
January 2013 27
Green Building & Renuables.indd 27 1/15/2013 11:48:10 AM