| PARTICULARS |
‘MATANGI’ FANLESS
COOLING TOWER |
FAN OPERATED COOLING
TOWER
|
| Design |
To work outevaporation required and quantity of air
required for this evaporation |
Same |
| Air draft |
Created with nozzles.
Numbers of nozzles are worked out. |
Created with fan. Size of
fan is worked out. |
| Evaporation losses |
Will depend on wet bulb
temp. and delta ‘T’ |
Will depend on wet bulb
temp. and delta ‘T’ |
| Drift losses |
Controlled by overlapping
louvers |
Drift eliminators used,
consumes more power |
| Approach |
Up to 3-4 0 C
Steady all the time. |
Can be less than 3 o C.
Increases as fills breaks
and chokes |
| Range |
Can be designed as per
requirement
or
higher range two towers in series to be installed |
Can be designed as per
requirement
For
higher range two towers in series to be installed |
| Capacity
(Flow rate) |
Can be designed for any capacity.
Higher capacity to be split
in two or more Numbers of modules. |
Can be designed for any capacity.
For higher capacity to be
split in two or more numbers of cells |
| Maintenance |
No moving parts
No breakdown maintenance
No stoppage of cooling
tower so long as circulation pump is running |
Possibility of breakdown of
bearings, fan, gear, motor, fills, etc.
Cooling tower to be stopped
for repairing
Breakdown and maintenance
can’t be avoided. |
| Spare parts |
No spares required few nozzles can be kept
Nozzles can be changed without
stopping cooling tower. |
Require spares for drive
and fills
Have to depend on supplier
|
| Stand by cooling tower |
Even for continuous
operation stand by cooling tower not required |
For continuous operation
stand by cooling tower is required to take care against breakdown |
| Cost and investment |
Initial cost is less.
No investment for stand by
cooling tower.
Thus two ways saving in
investment. |
Higher initial cost.
Cost
of stand by cooling tower.
So added initial
investment. |
| Power consumption |
No power consumption.
Equivalent power available
for other critical process equipment |
Power is a must at the cost
of other critical process equipment. |
| Payback period |
No power consumption.
No power bill.
Payback period is almost
one year. |
No payback period
On the contrary there is
running expense on power bill |
| Power failure |
In case of power failure
only circulation pump is to be run on D G. |
In case of power failure D
G is to be unnecessarily loaded for fan motor. |
