Adjustment of chilled water and cooling water in air-cooled towers
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The design specifies 100 for chilled water and 300 for cooling water. Is it possible to increase the flow rate of chilled water and reduce that of cooling water? By how much can it be adjusted, and what determines this?
Adjustments can be made on a small scale; the key is to ensure that the temperature of the air exiting the air-cooled tower remains within acceptable limits. Also, make sure that the motor current of the refrigeration pump being used does not exceed the specified limit, so as to avoid damaging the water pump, which would cause problems
I am not an expert; this is for reference only. Consider aspects such as the resistance of air-cooled towers, their drainage capacity, the capacity of water pumps, and the water replenishment capacity of water-cooled towers
Increasing the amount of chilled water is possible only if the pump has sufficient power and the chiller has adequate cooling capacity! Otherwise, it’s useless! Just my personal opinion!
Chilled water and cooling water come into direct contact with air for wash-type heat exchange to achieve cooling, so the purpose is to reduce temperature. The chilled water usually comes from water in the nitrogen cooling tower, and it is cooled using a chiller or an ammonia-cooled heat exchanger; the amount of chilled water depends on the capacity of the motor driving the chilled water pump as well as the heat exchange capacity of the chiller or ammonia-cooled heat exchanger ； The cooling water is usually recycled water from large tanks, pressurized by pumps; the amount depends on the capacity of the pumps ； The water levels of the two types cannot both exceed the design values; the liquid level in the air-cooled tower is controlled by interlocks to prevent water from flowing back into the air compressor.
I would like to ask the original poster: what methods do you use to increase the flow rate of the chilled water? Should we replace the pump, or is your chilled water system currently controlling the flow?
Generally, non-variable-frequency pumps control flow by using an outlet throttle~~So, check whether the outlet throttle valve of your cryogenic pump is fully open ~~
Well, our chilled water pumps are all running at full capacity; there has never been any restriction on them
Well, if it’s really necessary to increase the amount of water used for cooling, the only option is to replace the pump~~
The chilled water flow rate can be increased appropriately, provided that the outlet temperature of the air-cooled tower is satisfactory However, in general, during process design, the cooling capacity of the chiller remains constant under the designed operating conditions; increasing the water volume will raise the temperature.