 Retro-fit
wet sections are an easy and cost effective way to add cooling to an existing
ventilation system or supplemental cooling to an existing air handling system
is by installing an evaporative wet section on the fresh air intake. Installing
a wet section on an existing ventilation system is a very easy retro-fit
in most cases. After determining the airflow of the system in CFM ( cubic
feet per minute ) the wet section can be properly sized so that air speed
across the media is in the 500 FPM ( feet per minute ) range. If the size
of the wet section turns out to be larger than the existing intake duct
we can supply transitional ducting to connect the two. After the physical
installation is complete the only things left to do are supply water to
the float valve connection and power to the pump. The pump can be controlled
in a number of ways including a simple on off switch or thermostatically
to come on at a given temperature. The addition of a MegEvap wet section
transforms a system that delivers hot dirty air to the space into one that
supplies cool clean air. Because the only power required to operate the
wet section is what it takes to run the pump (usually fractional horsepower
) cost of operation is extremely low.
 Supplemental
cooling on an existing air handler is another application for a retro-fit
wet section. This can be a very cost effective installation on a system
that uses a large amount of fresh air because of process requirements such
as purging fumes or contaminants or in agricultural applications such as
mushroom farms and citrus degreening. When it is undesirable to run the
evaporative wet section at the same time as the existing cooling coil face
and bypass dampers can be installed to bypass air around the evaporative
section when the cooling coil is active. When the compressor shuts down
(direct expansion system) or the chilled water valve closes incoming air
is again directed through the wet section reducing the temperature of the
outside air entering the space and lengthening the off cycles of the existing
system and in turn saving energy. Savings increase when conditions are such
that the evaporative section can carry the entire cooling load which can
be the case for many hours of the day. Another benefit of adding a wet section
to an existing system is added air filtration. The air passing through the
evaporative media is exposed to thousands of square feet of wet surface
which traps contaminants much like an insect on fly paper. Because of the
self cleaning design of the media we use the contaminants are washed into
the sump where they are periodically flushed. The wet media will effectively
filter dust, smoke, pollen, spores and other particulates, it will even
reduce VOCs ( volatile organic compounds ) such as CO, CO2 and NOX gases
resulting in improved air quality. Another benefit to the filtering effect
is increased life of downstream filters further reducing operating costs.
Because of the low first cost, savings in operating costs, ease of maintenance
and years of benefit, adding a MegEvap wet section to your existing ventilation
or air handling system is a sound investment.
- All stainless steel construction.
- 12" rigid media.
- Integral sump, make-up valve, recirculation pump, distribution system,
flow control, and bleed-off valve to help reduce scaling.
Call for pricing and delivery options at (435) 743-5561 or email inquiry to info@megevap.com.
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