Specifications
Specification Value
MH Fluid Cooler —
Specifications: Base
9
1.0 Base:
1.1 Provide an induced-draft, crossflow-type,
factory assembled, galvanized steel,
closed circuit fluid cooler. Unit shall con-
sist of _____ cell(s), as shown on plans.
The limiting overall dimensions of the
fluid cooler shall be _____ wide, _____
long, and _____ high to the top of the
fan guard. Total operating horsepower of
all fans shall not exceed _____ hp. Fluid
cooler shall be similar and equal in all
respects to Marley Model _______.
2.0 Thermal Performance:
2.1 Water as the heat transfer fluid.
The fluid cooler shall be capable of
cooling _____ gpm of water from _____
°F to _____ °F at a design entering air
wet-bulb temperature of _____ °F. Coil
pressure drop shall not exceed _____
psi. The thermal performance rating shall
be Certified by the Cooling Technology
Institute.
2.1 Aqueous glycol solution as the heat
transfer fluid.
The fluid cooler shall be capable of cool-
ing _____ gpm of _____% by volume
ethylene/propylene glycol solution from
_____ °F to _____ °F at a design entering
air wet-bulb temperature of _____ °F. Coil
pressure drop shall not exceed _____
psi. The thermal performance rating shall
be Certified by the Cooling Technology
Institute.
2.2 The closed circuit cooling fluid cooler
shall be capable of a minimum _____
gpm/hp efficiency per ASHRAE
Standard 90.1.
2.3 Heat loss from the fluid cooler shall be
limited to ____ Btu/h for the standard
fluid cooler/fluid cooler with positive clo-
sure dampers/fluid cooler with positive
closure dampers and insulation, based on
50°F inlet fluid temperature and -10°F
ambient temperature with 45 mph wind
and fan(s) and pump(s) off.
■ Your specification base establishes the type, configuration, base material, and
physical limitations of the fluid cooler to be quoted. During the planning and lay-
out stages of your project, you will have focused your attention on a fluid cooler
selection that fits your space allotment, and whose power usage is acceptable.
Limitations on physical size and total operating horsepower avoid the introduc-
tion of unforeseen operational and site-related influences. Specifying the num-
ber of cells, and the maximum fan hp/cell will work to your advantage.
The benefit of crossflow fluid coolers is that they are inherently easy to operate,
access, and maintain. Unlike counterflow fluid coolers, crossflow fluid cool-
ers have a spacious plenum between banks of fill for easy access to all of the
tower’s internal components, and the water distribution system is adjacent to
the fan deck.
■ CTI Certification means that the fluid cooler has been tested under operat-
ing conditions and found to perform as rated by the manufacturer under those
circumstances. It assures the buyer that the tower is not intentionally or inad-
vertently undersized by the manufacturer. The MH Fluid Cooler has been tested
and performance certified with water, ethylene glycol solutions up to 50% con-
centration and propylene glycol solutions up to 50% concentration.
The minimum efficiency per ASHRAE Standard 90.1-2010 for axial-fan closed
circuit cooling towers applied to comfort cooling is 14.0 gpm/hp at 102°F /
90°F / 75°F, where hp is the sum of the fan motor nameplate power and the
integral spray pump motor nameplate power. If a greater efficiency is desired, a
higher ASHRAE Standard 90.1 gpm/hp can be specified. Each model’s rating
at ASHRAE Standard 90.1 conditions can be viewed in our online selection
software at spxcooling.com/update.
(44 Seiten)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Kommentare zu diesen Handbüchern