ASHRAE Journal - May 2014 - 23

Technical FeaTure
Fea

properly designed, is more efficient than VAV cooling. This comparison, based on actual measurements
instead of simulations, is more reliable and accurate
than studies that use energy modeling software.
The building has been awarded a LEED India Platinum
rating. Those in India looking for guidance on low
energy buildings visit it frequently. The building also
was featured in the Best Practices Guide for High
Performance Office Buildings in India published by the
Lawrence Berkeley National Lab.
One of the more exciting stories of the building was
when a large software company from Silicon Valley came
to visit. They wanted to see a large-scale radiant building
in a challenging climate with software engineer employees. The SDB-1 building was one of only a handful of
buildings in the U.S., Europe and Asia that they visited.
Based on the visit and some other research, they decided
to proceed with radiant cooling in
their own building. It is indeed a
surprise when a U.S. company visits
India for validation of innovative
ideas and technologies.
Infosys has found and proved to
itself that radiant cooling improves
comfort, lowers HVAC energy use
and saves HVAC construction costs.
Infosys has combined the radiant
energy savings with better building
envelopes and lighting to produce
buildings that use 60% to 70% less
energy than the generation of buildings from just five years ago.
As a result of the SDB-1 building,
Infosys has transformed its building standards. It is now completing
more than 2 million ft2 (185 806 m2)
of radiantly cooled buildings. Most
of those use the in-slab system, but
they also have a 500,000 ft2 (46 452
m2) building with radiant panels.
They have started to use the medium
temperature chilled water design in
these buildings.
A new campus in Pune has a
central plant with two different
chilled water temperatures distributed throughout the campus. That

table 1 Cost comparison of conventional & radiant cooling system.
VaV

Radiant

ChilleR

3,145,200

3,145,200

Cooling toweR

1,306,400

1,306,400

hVaC low side woRks

22,839,000

15,310,000

ahUs, doas, hRw

5,118,200

2,878,900

Radiant piping, aCCessoRies,
installation, etC.

0

9,075,800

bUilding aUtomation system

6,184,000

6,584,000

total Cost (in RUpees)

38,592,800

38,300,300

aRea (m 2)

11 600

11 600

RUpees/m 2

3,327

3,302

hVaC system Cost $/ft 2

$5.15/ft 2

$5.11/ft 2

www.info.hotims.com/49804-21

M ay 2 0 1 4

ashrae.org

ASHRAE JouRnAl

23



ASHRAE Journal - May 2014

Table of Contents for the Digital Edition of ASHRAE Journal - May 2014

Contents
ASHRAE Journal - May 2014 - BB1
ASHRAE Journal - May 2014 - BB2
ASHRAE Journal - May 2014 - Cover1
ASHRAE Journal - May 2014 - Cover2
ASHRAE Journal - May 2014 - 1
ASHRAE Journal - May 2014 - 2
ASHRAE Journal - May 2014 - Contents
ASHRAE Journal - May 2014 - 4
ASHRAE Journal - May 2014 - 5
ASHRAE Journal - May 2014 - 6
ASHRAE Journal - May 2014 - 7
ASHRAE Journal - May 2014 - 8
ASHRAE Journal - May 2014 - 9
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ASHRAE Journal - May 2014 - 12
ASHRAE Journal - May 2014 - 13
ASHRAE Journal - May 2014 - 14
ASHRAE Journal - May 2014 - 15
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ASHRAE Journal - May 2014 - 17
ASHRAE Journal - May 2014 - 18
ASHRAE Journal - May 2014 - 19
ASHRAE Journal - May 2014 - 20
ASHRAE Journal - May 2014 - 21
ASHRAE Journal - May 2014 - 22
ASHRAE Journal - May 2014 - 23
ASHRAE Journal - May 2014 - 24
ASHRAE Journal - May 2014 - 25
ASHRAE Journal - May 2014 - 26
ASHRAE Journal - May 2014 - 27
ASHRAE Journal - May 2014 - 28
ASHRAE Journal - May 2014 - 29
ASHRAE Journal - May 2014 - 30
ASHRAE Journal - May 2014 - 31
ASHRAE Journal - May 2014 - 32
ASHRAE Journal - May 2014 - 33
ASHRAE Journal - May 2014 - 34
ASHRAE Journal - May 2014 - 35
ASHRAE Journal - May 2014 - 36
ASHRAE Journal - May 2014 - 37
ASHRAE Journal - May 2014 - 38
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ASHRAE Journal - May 2014 - 43
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ASHRAE Journal - May 2014 - 103
ASHRAE Journal - May 2014 - 104
ASHRAE Journal - May 2014 - Cover3
ASHRAE Journal - May 2014 - Cover4
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