products make use of the desirable properties of water, one of natureís
most abundant cooling media, to provide cooling solutions for air-conditioning,
industrial processes, power generation and refrigeration. In most
areas of the world, water is abundant and inexpensive, and its "latent
heat", or ability to reject or absorb large quantities of heat through
evaporation (latent heat of vaporization) or freezing (latent heat
of fusion) make it ideal for these applications:
BACís cooling towers, closed-circuit fluid coolers and evaporative
condensers make use of evaporative cooling. That is what makes you
feel cool when you climb out of a swimming pool or the ocean on
a breezy day. Evaporation from the water on your skin pulls heat
from your body and makes you feel colder than the surrounding air.
The same thing is true in one of our evaporative cooling products.
The evaporative cooling principle makes it possible to cool or condense
to a lower temperature than simple dry-air cooling, so you save
on space, equipment cost, and energy consumption. No wonder evaporative
cooling is the first choice at most central chiller plants and industrial
cooling installations around the world!
Ice Thermal Storage:
Ice thermal storage uses the latent heat of fusion of water to "store"
thermal energy as ice. The advantage of this "thermal storage" is
the fact that electrical energy can be used during off-peak periods
to provide cooling during peak periods. In other words, the operator
of an ice thermal storage system can run chillers to generate cooling
effect during periods when energy is inexpensive (usually at night),
and use the ice to provide cooling for the building system during
the peak periods (usually during the day). This is called "demand-shifting,"
and in many cases utilities will provide economic incentives for
owners to install ice thermal storage systems to shift the electrical
demand from peak periods to off-peak periods.
In addition to savings from incentives and off-peak energy consumption,
other significant first cost advantages are realized from thermal
storage using ice. Cooling with ice allows systems to operate with
36įF cooling water and a cooling range up to 20įF, so piping and
pump sizes can be reduced compared with conventional systems. Designing
around low temperature air distribution means that ductwork sizes
can also be reduced.
Research and Development at BAC:
Research and development for BACís evaporative cooling and thermal
storage products are conducted at BACís 25,000 square foot test facility
in Jessup, MD, one of the most advanced in the industry. Here, BAC
engineers and technicians can simulate the broad range of environmental
and system operating conditions encountered by our products in actual
use. After new concepts are screened by computer modeling, tests are
conducted on equipment ranging in size from small prototype modules
up through full-scale field-erected cooling towers.
addition to thermal testing in controlled-environment test chambers,
a wide range of material and component development activities are
conducted, including fan development, static and dynamic stress evaluations,
accelerated aging and corrosion testing, hydraulic tests and wind
tunnel tests. Dozens of patents and a complete line of evaporative
cooling and thermal storage products have resulted from this state-of-the-art
its founding in 1938, Baltimore Aircoil Company has specialized in
the design and manufacture of evaporative cooling and heat transfer
equipment, and has become a world leader in this field. BACís continuing
program of research and development has produced many innovations
which have evolved to become the standards of the industry.