The Greener Closed-Loop System0 pages

The Greener Closed-Loop System
Cooling tower heat exchanger systems beat closed-circuit cooling towers for economy and efficiency!
Certain processes require a closed-loop, whereby

Cooling Tower Heat Exchanger System vs. Closed Circuit Cooling Tower

the process water for cooling does not come in

Cost for typical installation
Conditions: 330 GPM, 102°F EW, 90°F LW, 78°F WB

contact with the atmospheric air. This prevents
the cooling water from picking up particles that
may not get filtered or even dissolved gases.

Closed-Circuit Cooling Tower

Closed-loop cooling requires more energy and has

Total HP

42

higher initial and life-cycle costs than an open cooling

Materials

Galvanized Steel

tower, but provides an added protection to expensive
processes or chillers being cooled.
Costs
For closed-circuit cooling, Delta recommends a
cooling tower plus a plate heat exchanger system.

$38,520 (including
closed-circuit cooling
tower, basin heater,
spray pump and control
panel

Cooling Tower Heat Exchanger Sys.

17.5
HDPE Cooling Tower
Stainless Steel Exchanger
$25,980 (including cooling
tower, basin heater, skid
mounted heat exchanger with
spray pump and control panel

The skid-mounted plate heat exchanger provides a closedcircuit on the hot side of the heat exchanger. The noncorroding Delta cooling tower feeds the cold side of the
plate heat exchanger.
The advantages of this system over a closed-circuit cooling
tower (usually galvanized sheet steel and galvanized steel
coil inside a cooling tower box) are:
•

Cost - Typically Costs Less to purchase & operate

•

HP - Less Total HP required, Green solution

•

ASHRAE 90.1 Performance requirements for heat
rejection equipment show closed-circuit cooling towers
use 2.5 x more HP

•

Warranty - Delta cooling tower has 15-Year casing
warranty versus 1-Year on galvanized steel

•

Expandability – Heat Exchanger can handle future
load increase by adding plates

•

Maintenance – Heat Exchanger has Stainless Steel plates
and is much more accessible than coil for easy cleaning

•

Weight – Delta tower is 3-7 times less weight saving rigging
and structure costs

•

Install Flexibility - Heat Exchanger skid can be placed
indoors without need to maintain Glycol solutions
necessary with outdoor coil

•

Water treatment - Easier and much less risk with
Engineered Plastic Cooling Tower

•

Replacement Cost - Galvanized steel coil replacement
cost (labor and material) often exceeds initial unit cost of
Closed Circuit Cooling Tower

•

Downtime – Delta system prevents costly downtime.
Corrosion is only delayed with galvanizing and wet/dry
operation, chemicals, PH fluctuations, salts and other
atmospheric conditions can lead to premature failure

Delta Cooling Towers, Inc.
Phone: 973-586-2201 – Fax: 973-586-2243
www.deltacooling.com