DriSteem® High-Pressure System

Overnight Expert Evaporative cooling and humidification

High-pressure pump station

PRODUCT DESCRIPTION• High-quality, industrial-grade cooling and

humidification system

TECHNOLOGY• High-pressure pump – Propels purified, unheated water to each nozzle • Advanced nozzle technology – Disperses ultra-fine droplets (90% are 10 microns

or less) that quickly absorb in warm air-handler airstreams or open spaces

• Wide capacity – 250 to 5500 lbs/hr (113 to 2495 kg/h) per system – Install multiple systems for higher capacities • Zoning capability – Supply multiple airstreams, with differing needs, with

a single high-pressure system

BENEFITS• Cooling and humidification energy savings – Uses heat present in air to evaporate dispersed water – Twelve pounds of dispersed water equals about one

ton of cooling• Green/sustainable technology – 1 LEED credit for cooling load reduction and innovation – Utility rebate potential• Low maintenance – Water-lubricated pump: No maintenance until 8,000

hours (vs. competing oil-lubricated pump at 500 hours) – Stainless steel dispersion nozzles and manifolds

require no regular maintenance • Tight control/quick response time – Advanced Vapor-logic® controller – Response time as short as one second – View or change settings using intuitive web interface

or easy-to-use keypad and display – Interoperability with multiple building management

systems via Modbus and optional BACnet® or LonTalk®

• Complete solution including water treatment – System includes reverse-osmosis hyperfiltration,

particulate filtering, dechlorination, and duplex water softening

– Eliminates white dust fallout and bacteria/virus proliferation

– Perfect for demanding applications that require clean water

APPLICATION FIT: PARAMETERS Q&AQ Does application require humidification and/or cooling?A This system does well with either; ideal where both are

required

Q What is the capacity range?A Best fit is 250 to 5500 lbs/hr

Q Is it a duct or area-type application?A Each is treated differently; contact DriSteem for more

details

Q How much outside air?A The more the better, but we can still look at a smaller %

Q How many zones are there?A Maximum recommended number of zones = 10

APPLICATION FIT: TYPICAL TARGET MARKETS• Data centers (cooling and/or humidification) – Primary concern is energy usage. Key measure is

Power Usage Effectiveness (PUE) = total power / IT equipment power

– Year-round cooling requirement = excellent fit• Comfort humidification• Government, universities and labs• Industrial • Possible exception:

Some states prohibit the use of adiabatic technology in health care facilities

8 Humidified zones: one, two, or three stages per zone

1 Municipal water inlet

2 Dechlorinator 3 Duplex water softener

1 Water enters system from municipal water supply

2 Dechlorinator (wall-mounted on smaller models)

3 Duplex water softener

4 RO station with particulate filter and RO membranes

5 Pressurized RO holding tank

6 High-pressure pump station:

All-stainless-steel axial-piston high-pressure pump delivers purified, high-pressure water to atomizing nozzles

Vapor-logic controller optimizes absorption in multiple humidification zones

7 Main water line feeds network of high-pressure, stainless-steel piping

8 Humidified zones: purified, ultra-fine water droplets exit micro-turbine nozzles and disperse in AHUs, ducts, and/or open spaces

9 Final evaporation media installed downstream of AHU heating coil prevents downstream wetting

Zone 1 control cabinet

To solenoid valves

To network

A COMPLETE EVAPORATIVE COOLING AND HUMIDIFICATION SYSTEM THAT INCLUDES WATER TREATMENT

Zone 1

DriSteem® High-Pressure System

4 RO station:• Particulate filter• RO membranes

6 High-pressure pump station:• High-pressure stainless steel pump• Vapor-logic controller

7 Main water line

5 Pressurized RO holding tank

Zone 2 control cabinet

Zone 3 control cabinet

Zone n control cabinet

To network To network To network

To solenoid valves To solenoid valves To solenoid valves

Zone 2 Zone 3 Zone n

Sequence of operation

DriSteem CorporationA subsidiary of Research Products CorporationAn ISO 9001:2000 certified company

U.S. Headquarters:14949 Technology DriveEden Prairie, MN 55344800-328-4447 or 952-949-2415952-229-3200 (fax)

European office:Marc Briers Grote Hellekensstraat 54 b B-3520 Zonhoven Belgium +3211823595 (voice) +3211817948 (fax) E-mail: marc.briers@dristeem.com

www.dristeem.com

© 2013 Research Products CorporationForm No. OE-HPS-0813

CUSTOMER Q&A / POSSIBLE OBJECTIONSQ Is this technology capable of tight control, and can it

meet a strict specification like ours?A Yes. DriSteem High-Pressure Systems are installed in

a variety of demanding applications. The advanced Vapor-logic controller ensures tight control with a response time as short as one second. DriSteem engineers will provide evaporation efficiency and psychrometric charts specific to your application to verify that the system meets your performance criteria.

Q What about wetting?A Nozzles create ultra-fine particles (90% are less than

10 microns) that are easily absorbed into the air. DriSteem’s experts will help you properly size and design the system for your specific application to mitigate wetting. For AHU applications, DriSteem also provides final evaporation media (a mist eliminator).

COMPARISON TO OTHER ADIABATIC TECHNOLOGIES • Compressed air/water: Combines water and

compressed air to create small water droplets. This method uses more energy than a high-pressure system and requires both air and water supplies.

• Wetted media: Water saturates a large absorbent material/filter and remains until it evaporates into an airstream. This technology has a delayed control response and requires regular media/filter changeout.

• Centrifugal (spinning disk) and ultrasonic (vibrating disk): These technologies are limited in their range of applications because of low capacity.

COMPETITION

Meefog • Market leader• Technology: High-pressure water with impaction pin

nozzle• #1 in turbine inlet cooling • Strong in data center • Strengths – Low energy usage and small droplet size (same as

DriSteem’s High-Pressure System)• Weaknesses – Higher maintenance (due to oil-lubricated pump) – Controllability

Nortec • Technologies: High-pressure, wetted media, and

compressed air and water• Agriculture, printing• Strengths – Range of technologies – Established in HVAC • Weaknesses – Higher energy usage (compressed-air/water units) – Higher maintenance (high-pressure system uses oil-

lubricated pump) – Service issuesMunters • Technology: Wetted media • Data center presence• Strengths – Low energy usage – Simple, easy to understand • Weaknesses – Regular media replacement required – Delayed controlOther competitors • Many small players that are not significant • Capacity ranges are too small to compete

SPECIFIABLE DIFFERENCES (DRISTEEM VS. COMPETITORS)• DriSteem evaporation efficiency charts for specific

applications. (Meefog provides only one data point.)• 8000 hours minimum before DriSteem maintenance

check. (Meefog/Nortec oil-based pumps require maintenance check every 500 hours with oil change.)

• Tight control/response time using DriSteem's advanced Vapor-logic controller: Response time as short as one second. (Munters has delayed control; Meefog uses an off-the-shelf controller with 30-second resolution.)