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Ecodry Comparison Charts
www.frigel.com
Comparison with
Cooling Tower
Page 2 of 4 | Ecodry Comparison Chart – Comparison with Cooling Tower
Comparison with Cooling Tower
Ecodry System v. Cooling Tower Circuit
Cooling Tower Circuit
Ecodry System
Open System
Max Temperature: 28/30°C (82/86°F)
for both Oil and Molds
Method of Heat Rejection:
Water Evaporation
Close System (Ecodry + Microgel + Turbogel)
Main Circuit Temp: 32/35°C (90/95°F)
Point-to-Point Process Cooling Units
One or Two Flexible and Precise Temperatures
to each Mold from -5 to 90°C (25 to 195 °F)
and one or two customized pumps
for each mold
Method of Heat Rejection:
Dry Air Convection for Main Circuit and
Compressor for Molds (when required)
Page 3 of 4 | Ecodry Comparison Chart – Comparison with Cooling Tower
Comparison with Cooling Tower
Cooling Tower Disadvantages
Water Quality
• Poor Quality of Water to Process
• Permanent Contamination
• Solids, Gases, Algae
• High risk of Bacterial contamination (i.e.
Legionella)
• Scale Accumulation
• Permanent Oxidation
• Reduced Heat transfer Efficiency and
Performance due to Fouling and scaling
• Winter Icing
Productivity
• Lack of flexibility and precision in temperature
control.
• Impossible to cool the water below Wet Bulb
Temperature
• Variable water flow to molds, highly affected by
the other users.
• Contamination and Scale Accumulation inside
Molds Cooling Channels and TCU’s (when
used), provoking clogging and reduced heat
transfer efficiency with frequent need of
mechanical scale removal.
• Frequent downtimes
• Higher cooling Cycle Times due to High and
Variable delta T on molds and reduced heat
transfer efficiency.
Ecodry System Advantages
Water Quality
• Excellent quality of water, almost
maintenance-free.
• No scale accumulation on heat-exchangers
and circuits – constant efficiency
• No chemicals consumption and/or disposal.
• No risks of bacterial infections or
contamination
• Available in “Self Draining” configuration,
that can work in ANY climate with no use of
Glycol
Productivity
• Possibility of searching and repeating the
optimum cooling conditions for each mold.
Complete independence of setting.
• Precise automatic control of the mold
temperature.
• Cooling conditions (temperature AND flow)
permanently stable and under control for
each mold.
• High cooling efficiency with low delta T of
the process fluid through the
mold with Lower Cycle Times
• A much higher quality of molded parts. Less
scraps.
• Communication interfaces available with
process machines.
Page 4 of 4 | Ecodry Comparison Chart – Comparison with Cooling Tower
Comparison with Cooling Tower
Running costs
• Continuous Water Consumption
• Increasing Costs for Water
• Ongoing Water Treatment and
Chemical Consumption & Disposal
• Increasingly Stricter Laws and Regulations
• Periodic Heat Exchanger Maintenance
• High risk of damages due to corrosion,
oxidation and frequent mechanical scale
removal
• High water pressure drops across the main
water pipe-work.
Installation
• Complicated and costly Initial Installation for
centralized pump-tank groups
• Complicated and costly Expansions
Running costs
• Negligible Water Consumption
• No Chemicals Consumption & Disposal
• No Maintenance (Higher Uptime)
• Clean and safe molds, thanks to the use of
clean “closed circuit” water
• Low Pressure Drops across the main water
pipeworks
• High and constant Flow through the molds
often allows higher fluid
temperature, reducing the risk of mold
sweating and reducing energy consumption
• Free-Cooling Opportunities as a standard
feature
• Lower Energy Consumption
Installation
• Simple, quick and inexpensive
installation. No need for intricate central
pumping groups.
• No need for main pipeworks insulation
• Modular concept “Easy to expand”