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”