Packaged Cooling Systems
— Closed-Circuit Cooling Systems

Closed-Circuit Cooling Systems
Closed-Circuit Cooling Systems

Closed-Circuit Cooling Systems

Certain processes require a closed-loop, whereby the process water for cooling does not come in contact with the atmospheric air. This prevents the cooling water from picking up particles that may not get filtered or even dissolved gases.

A diagram of how a closed loop system works.  A blue line, representing cold water runs from the induced draft cooling tower into the booster pump, into the plate and frame heat exchanger into the compressor or heat source.  A red line, representing hot water leaves the compressor or heat source and goes into the process loop booster pump, back into the plate and frame heat exchanger and finally enters back into the cooling tower.

Certain processes require a closed-loop, whereby the process water for cooling does not come in contact with the atmospheric air. This prevents the cooling water from picking up particles that may not get filtered or even dissolved gases. Closed-loop cooling requires more energy and has higher initial and life-cycle costs than an open cooling tower, but provides an added protection to expensive processes or chillers being cooled.

For closed-circuit cooling, Delta recommends a cooling tower plus a plate heat exchanger system. The skid-mounted plate heat exchanger provides a closed-circuit on the hot side of the heat exchanger. The non-corroding 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 20-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
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The Most Durable Corrosion-Proof Cooling Towers Available
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Corrosion Proof & Seamless Cooling

Delta Cooling Towers contain one piece, shell or casing, eliminating issues with seams, welds, and patches. Because they are rust and corrosion proof, Delta’s Cooling Tower Systems endure longer lifecycles.

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Low Maintenance
and 20-Year Warranty

Our overall maintenance is minimal and the tower shell does not require preventive maintenance which lowers cost and expensive downtime. The benefits are extraordinary!

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Save
H2O

Water chemistries and engineered plastic cooling towers combined translate into an extremely effective solution to water conservation as well as cost savings.

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Low Sound &
Other Special Options

The noise pollution of commercial HVAC equipment has become an increasingly unwanted problem for communities. Delta Cooling Towers are unrivaled among other manufacturers in providing solutions.

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Made in
USA

The term “Made in the USA” speaks of quality, excellent craftsmanship, and a superior product. Delta ranks as the technology leader among cooling towers manufacturers in USA!

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From our low maintenance design to our manufacturing process to excellent customer service, we're sure you'll be pleased with our superior cooling towers, every step of the way. Get a quote