500RT Cooling Tower

[ksm]

Dear All,

In our chiller plant,for one 400RT centrifugal chiller,we need to run two 500RT cooling towers.If we run one 500RT cooling tower only,the chiller is frequently tripped by high condenser water temperature.

So i would like to know , normally one 400RT chiller can support by one 500RT cooling tower or not ? How we calculate ?

Please help!!:)

[serviceman]

cooling tower may be fine, check that the condenser is dirty filters or "Y" are not dirty

[ksm]

Condenser tube cleaning has been done within one week.

[Brian_UK]

Is the cooling tower clean and performing correctly?

[ksm]

Cooling tower is clean and performing as normal.I'like to know that,for 400RT chiller,what size(capacity) of cooling tower is sufficient to heat reject ? Assuming chiller is running on full load.

[peterwin]

Cooling tower capacity can be calculated cooling capacity plus compressor capacity. And also need to add some safety factors. Water flow must be according to the manufacturer specification.

You can also try by reducing your cooling load. That means you increase cooling load one by one.

Just sharing knowledge.:)

[peterwin]

Cooling tower capacity can be calculated cooling capacity plus compressor capacity. And also need to add some safety factors.

You can also try by reducing your cooling load. That means you increase cooling load one by one.

Hope to solve the problem.:)

[CV_Geardrive]

Hi KSM,
Cooling tower capacity is chiller cooling Kw + motor Kw.
As a rule of thumb we can say 130% to 135% of cooling capacity.
But this capacity can be achieved in specific water flow, entering water temperature, ambient dry and wet bulb temperature.
You should check the cooling tower design against actual conditions.
You can also try to decrease current limit set point or limit the maximum opening of IGV to keep the unit in operation.
Hope I help.

[ksm]

Thanks All.