DriSteem Vapor-Logic Spécifications télécharger pdf (Page 12)

Page 12 • DRI-STEEM Vapormist humidifier

Drip-free dispersion basics

Guaranteed non-wetting distances

Using data collected in our on-site test lab, we have developed

guaranteed steam absorption (non-wetting) distances. Performance

charts allow you to confidently choose equipment that will

accommodate any application.

Dry steam

Adding humidification to an airstream without creating wetness

in the duct system is critical for the maintenance of a healthy

environment. Wet areas in ducts are a threat to the health of

building occupants since they moisten dust on duct floors, creating

ideal breeding grounds for disease-producing microbes. In addition,

water accumulating in ducts can drip and cause building damage.

Steam exits drip-free through tubelets

All DRI-STEEM evaporative dispersion tube units discharge steam

through thermal-resin tubelets fitted into dispersion tubes. These

tubelets extend from the center of the tube, where the steam is

driest, through the tube wall, to the duct airstream. In essence,

the tubelets provide a temperature-neutral exit tunnel for steam,

allowing steam to cross over lower-temperature metal without

condensing or dripping. Each tubelet contains a calibrated orifice

sized for steam capacity. These tubelets are a DRI-STEEM exclusive,

and are essential for drip-free steam dispersion.

Condensate drains away

Some condensation is inevitable in steam dispersion, but through

careful design, condensate can be controlled and directed away

from where it can cause problems.

For example, the Ultra-sorb dispersion panel has a unique double-

header design that uses gravity to remove condensate. Steam enters

the supply header, exits through the tubelets, and condensate drains

out the return header. In the Rapid-sorb dispersion unit, steam

enters one end of a single bottom header with velocities carefully

managed so that condensate is not pushed out into the air along

with the steam; it drains out at the opposite end of the header.

Reduce condensate, wasted energy with high-efficiency tubes

To significantly reduce condensate and wasted energy, use

DRI-STEEM’s high-efficiency tubes, which reduce dispersion-

generated condensate and wasted energy by up to 85%. See

“High-efficiency Tube option” on Page 13.

mc_042610_1630

DRI-STEEM’s unique tubelets extend into the

center of the tube so only the driest steam is

discharged into the air.

Figure 12-2:

DRI-STEEM tubelets

Figure 12-1:

DRI-STEEM dispersion tubes

OM-150a

DRI-STEEM’s dispersion tubes are fitted with

one or two rows of closely-spaced thermal-

resin tubelets to evenly disperse steam across

the airstream.

Tubelet

Air ﬂow

Condensate

Steam

Calibrated

oriﬁce

mc_042610_1550

mc_042610_1555

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 23 24

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