If a blower on a cooling tower breaks down on a hot day what will happen to the water temp, approach, efficiency.
Water supplied to the condenser will be warmer.
approach temp will increase.
efficiency of the tower will decrease.
The cooling tower gets rid of the heat in the water by_____________.
evaporation
When sizing a cooling tower, the tower is sized to handle the cooling tower load of the conditioned area plus about_____________% for heat of compression.
25%.
Heat that the cooling tower must reject from the water in the chiller is the cooling load of the conditioned area plus the heat_____________.
Heat of compression.
Drift from the tower can be reduced by _____.
eliminators
The purpose of the cooling tower by-pass valve is to_________
help maintain the correct water temperature to the condenser in mild weather, by sending (bypassing the coil) the 95* entering water to below the tower to mix in with water that is coming out below design of 85*.
Water pump impellers are lubricated by.
Water.
Two methods used to aid the evaporation rate of water in a forced or induced draft tower are_______.
Splash and fill or wetted surfaces.
On a hybrid tower there are three modes, and they are called.
dry/wet
adriabatic
dry mode
A blowdown system for a tower does what.
Relieves the concentration of sediment in the sump.
Two types of shaft seals used for centrifugal pumps are________.
Stuffing box
Mechanical type
Natural draft towers and spray ponds are designed to produce a difference in water and air temperatures of ________*F.
10* F
Cooling towers can be made out of
Redwood
galvanized Steel
Fiberglass
Make up water level is controlled by what.
3 Part Answer
Solenoid controlled valve
Float valve
electrodes
Forced draft cooling towers are designed to reduce the entering water temperature to within_____*F of the air's wet-bulb temperature.
7*F
Harmonic imbalance can be cause by improperly aligned flexible coupling.
True or False
True
Natural draft cooling towers do rely on prevailing winds.
True or False
True
Strainers or located between the pump and the cool water outlet of the sump
True or False
True
If vortexing occurs, it is an indication that the water level in the sump is too low.
True or False
True.
If the centrifugal pump is located higher then the sump they do not need to be primed before they are started.
True or False
False
Three types of cooling towers are
Natural draft
Forced or Induced draft
Closed circuit hybrid
What is the purpose of the cooling tower in a water cooled system
the tower rejects heat absorbed into the chiller
Spreading the water out as it passes through the cooling tower helps the water_______faster
evaporate
What two types of fans are used in the cooling tower.
Belt drive,under 25000 BTU
Gear driven, over 25000 BTU
The two types of air flow through a forced draft cooling system air
Croosflow: Side to Top
Counterflow: Side to Side
Two types of Bacterial Control
Encapsulation:
Electroporation
Two planes of alignment for a coupling are
Angular: both shaft are the same angle
Parallel : are aligned end to end
Two methods used to evaporate the water in a forced air and induced tower are.
Splash
fill
how much water is used in a recirculated system
3 GPM
Author
salvatorefricano
ID
294294
Card Set
cooling towers and pumps chapter 48
Description
water cooling towers, chillers, wet bulb, approach, fans, pumps,
