1. SILICON VALLEY TECH
COMPANY ROLLS OUT
ASPENAIR TO NORTH
AMERICAN LOCATIONS
AFTER INDEPENDENT
PG&E STUDY
On behalf of PG&E, Alternative Energy Systems
Consulting (AESC) conducted an independent study
to project the results of proposed energy efficiency
measures, including installing AspenAir low pressure
filters. 8 of 35 HVAC units were monitored around the
clock to collect comprehensive data trends of
the units’ pre-installation performance. Collected
data was used to estimate energy savings stemming
from the reduction in pressure drop due to AspenAir
filters. The substantially reduced fan energy cost was
enough for this technology company to initiate
projects throughout their North American Facilities.
A technology company based in Milpitas, CA was looking for ways to
reduce costly energy and operational expenses. As they examined the
major sources of their costs, they identified HVAC as a primary oppor-tunity.
They engaged with an independent project manager at PG&E
to set up an experiment that would test their existing HVAC energy
load. Monitoring was put into place on 8 of 35 HVAC units and data
was collected during the 16 hours per day of operation.
After 6 weeks of data collection, the project manager concluded that
implementing the proposed measures could reduce the amount of
energy required to move air across filter bays by 80%. To compensate
for static pressure fluctuations associated with the filter change, static
pressure controls, coupled with VFDs on supply fans, should be incor-porated.
The engineering behind this idea is simple: with AspenAir fil-ters
installed, each unit provides more air flow and therefore, the speed
of the fans could be reduced, in accordance with the fan affinity laws.
The results were exactly what the company was looking for; they are
now planning to install AspenAir filters at their remaining North
American locations as a result of this independent study.
INDUSTRY Technology
COMPANY • $1.7B
Revenue
• 4,900
Employees
SITE
INFORMATION
• 2 sites:
65,000 sq ft /
70,000 sq ft
• Tested
8 of 35
representa-tive
units
• Test period:
6 weeks
• 16 hours/day
of operation
121,200 kWh Energy Reduction
13.8 kW Demand Decrease
75% Replacement Reduction
< 1 Year Payback
* Project based upon AESC/PG&E study