| |
Cooling
Towers Florida
  
|
L & R Equipment and Supplies is a
full service company for all your Cooling Tower requirements,
servicing the State of Florida. Factory Trained by the major
manufactures on Cross Flow and Counter Flow towers; replacing fill
media, fans, gearboxes, pulleys etc.
Rebuilding towers
to near factory heat transfer efficiency. We can provide all
necessary parts for any make or model,
with complete
instillation.
Specialty Coating including sand blasting and coating of wet areas,
hot water deck, basin, side walls and epoxy and urethane.
Accessories include new fill media, gear boxes and shafts, fans and
bearings, motors and other equipment. Please
call or email us for a no-obligation quote . |
|
|
Cooling Towers
Florida
|
Cooling Towers: |
·
Complete
rebuilding and maintenance on all makes, Marley, BAC, Evapco. Etc.
·
Parts and
instillation, fans, fill, gearboxes, belts bearings.
|
|
Corrosion Protection: |
·
Sandblasting
coating and sealing of all wet areas, hot water decks, walls, basin.
·
Prolong life of
system, uses less chemicals, deter bacteria growth.
|
|
Water Treatment: |
·
Non chemical water
treatment for scale buildup on tubes, piping and fill sheets.
·
Control of algae
and leigionella bacteria with our copper and silver electrode Ionizer.
|
|
Water Filtration: |
·
Complete water
filtration for removing of all solids with automation filter cleaning.
|
|
Used Equipment: |
·
Rebuilt cooling
towers, gearboxes, chillers, compressors etc.
|
Introduction
Cooling towers
are heat exchangers that use water and air to transfer heat
from air-conditioning systems to the outdoor environment. Most commonly,
they are used to remove heat from the condenser water leaving a chiller.
Cooling towers are usually located on rooftops or other outdoor sites.
Because they are frequently out of sight, they are often neglected by
operation-and-maintenance technicians, resulting in lower cooling-system
efficiency. This document will help you adopt best practices for the
efficient operation and maintenance of cooling towers.
Types of
Cooling Towers
hereinafter referred to as "CT" or "CTs"
There are two basic types of CT's, open and closed (sometimes
called direct and indirect).
Open
(Direct) CTs
Open CTs expose the condenser water coming from the chiller
plant directly to the atmosphere. This warm water is sprayed over a fill
in the CT to increase the contact area, and air passes through
the fill. Most of the heat is removed by evaporation. The cooled water
remaining after evaporation drops into the collection basin and is
returned to the chiller’s condenser.
Closed (Indirect)
Cooling Towers (CT)
A closed CT circulates warm water
from the chiller plant through tubes located in the tower. In a closed
CT, the cooling water does not come in contact with the outside air.
Water that circulates only within the CT is sprayed over the
tubes and a fan blows air across the tubes. This cools the condenser water
within the tubes, which is then recalculated to the chiller plant.
Key Components of a CT
This section explains how the components of a
CT work together.
Water Distribution
Hot water from the chilled-water system is
delivered to the top of the CT by the condenser pump through distribution
piping. In an open CT, the hot water is sprayed through nozzles onto the
heat transfer medium (fill) inside the CT. Some CTs feed the nozzles
through pressurized piping; others use a water-distribution basin and feed
the nozzles by gravity. In a closed-loop design, the water from the
condenser loop runs through tubes and is not exposed to the outside air.
In the open CT, a cold-water collection basin at the base of the CT
gathers cool water after it has passed through the heat transfer medium.
The cool water is pumped back to the condenser to complete the
chilled-water loop. In the closed CT, the condenser water cools as it
moves through the piping and returns to the chiller plant.
Heat Transfer Medium (Fill)
CTs use evaporation to release waste heat from
an HVAC system. In an open CT, hot water from the condenser is slowed down
and spread out over the fill. Some of the hot water is evaporated in the
fill area, or over the closed-circuit tubes, which cools the water. CT
fill is typically arranged in packs of thin corrugated plastic sheets or
as splash bars supported in a grid pattern.
Air Flow
Large volumes of air flowing through the
heat-transfer medium help increase the rate of evaporation and the cooling
capacity of the CT. The CT fans generate this airflow. The size of the CT
fan and airflow rate are selected to achieve the desired cooling at design
conditions of condenser-water temperatures, water flow rate, and
wet-bulb temperature.
CTs may have propeller fans or squirrel-cage blowers. Small fans may
be connected directly to the driving motor, but most designs require an
intermediate speed reduction provided by a power belt or reduction gears.
The fan and drive system operate in conjunction with the control system to
control start/stop and speed.
Variable-speed drives (VSDs),
when added to the fan motors, control fan speed and more precisely
regulate the temperature of the water as it leaves the CT.
Drift Eliminator
As air moves through the fill, small droplets
of chulled water become entrained and can exit the CT as carry-over or
drift. Devices called drift eliminators remove carry-over water droplets.
CT drift becomes annoying when the droplets fall on people and surfaces
downwind from the CT. Efficient drift eliminators virtually eliminate
drift from the air stream.
Return to
Top
|
|
|
