ENERGY STAT: MIRRORING SEVERAL OTHER SECTORS, LODGING FACILITIES SAW A
THREE-DECADE SPIKE IN ENERGY CONSUMPTION, ACCORDING TO THE DOE. PRE-1959
LODGING CONSUMED ABOUT 88.2 KBTU/SF, WHILE THOSE BUILT BETWEEN 1960-1989
USED ROUGHLY 111.5, AND STRUCTURES FROM 1990-2003 USED ABOUT 88.1.
ASHRAE’s Building Energy
Quotient (bEQ) program has
been updated to provide a clear-
er picture of a building’s true energy
use and allow more nimble comparisons
between energy consumption at various
types of buildings.
The bEQ program is a method of
rating and labeling buildings based on
energy use and offers two designations.
The As Designed label rates the expected
energy use under standardized conditions, independent of occupancy and
usage variables. The In Operation label
measures the building’s actual metered
energy use as influenced by the building’s occupancy, structure, and usage.
Changing is the program’s In Operation label calculations, which now rely
on actual metered energy use as informed by the building’s occupancy and
usage variables instead of the previous
methodology’s reliance on the ENERGY
STAR Portfolio Manager.
Rather than being limited to building types encompassed by the Portfolio
Manager, the bEQ program can provide
median energy use indices by climate
Updates to bEQ Program
zone for all building types covered in the
Commercial Building Energy Consumption Survey (CBECS). The updated bEQ
Workbooks also use methodology from
one of the informative appendices of
ASHRAE Standard 100, Energy Efficiency
in Existing Buildings.
“The new methodology allows greater
uniformity for many more available
building types, which should result
in better rating comparisons as those
buildings are now able to get a nor-
malized energy use index,” says Ross
Montgomery, bEQ Committee Chair. “In
addition, submission forms are easier
to use with more of the information
and calculation automated, as well as
expanded explanations, definitions, and
instructions to help better classify a
centers that comprise up to 95% of all
server energy usage.
The report points out issues such as the
fact that the average server operates at only
12-18% efficiency, underutilization of power
management software, and the estimated
20-30% of servers that remain plugged in
but are unused. The report also suggests
possible solutions to mitigate the effects of
increasing data center energy usage:
1) The adoption of a simplified server
utilization metric – One of the biggest obstacles to data center efficiency is
underutilization of servers. The report
recommends measuring the average
server utilization in central processing
units (CPU) as an affordable, understandable way to quickly produce opportunities
to save energy.
2) Increased disclosure of data center energy and carbon performance –
The release of data center energy consumption and performance statistics will
provide transparency and raise awareness, motivating stakeholders to take a
greater interest in not only the efficiency
of their IT department, but also the costs
associated with their data center usage.
3) Align incentives between decision
makers – A major hurdle to increasing
server efficiency is the breakdown of responsibility. The report suggests incorporating a single business model where IT
and facilities management work together,
share incentives, and implement common
charge-back mechanisms to help scale
virtualization, eliminate unused servers,
and utilize more efficient hardware.
With services such as cloud
computing, e-commerce, and
digital content gaining popular-
ity by the day, data centers are one of the
fastest-growing consumers of electricity
in developed countries.
The National Resource Defense
Council has created a report that shows
that American data centers are not only
consuming more energy but the amount
of power they waste is going up as well.
In 2013, data centers in the U.S. consumed around 91 billion k Wh of electricity and is projected to increase to 140
billion k Wh annually by 2020. The report
points out that the majority of energy usage is not in the large enterprise centers
commonly reported on by the media but
by small, medium, and corporate data
Data Centers Found Too Inefficient in the U.S.
Zero Net Energy
bEQ administered by ASHRAE
As Designed: Indicates the estimated energy consumption of this building as designed.
In Operation: Indicates the energy consumption of this building in actual use.
BUILDING ENERGY QUOTIENT
B A- A+