Impact of Circulating Water Pump Selection on Cooling Tower Cooling Efficiency

Shanghai Songjiang Vibration Absorber Co., Ltd. is pleased to introduce information about the impact of circulating water pump selection on cooling tower cooling efficiency. Songjiang Group provides high-quality rubber expansion joints and vibration isolators for numerous cooling towers, serving to protect the cooling towers and increase their lifespan.

The cooling effect of a cooling tower is described in terms of its cooling capacity, which is unrelated to the circulating water pump. However, in practical situations, we often encounter issues where these two factors interfere with each other. This article, based on real-life examples, focuses on describing the influence of circulating water pump selection on the cooling efficiency of cooling tower models. A cooling tower is a device used for dissipating heat and cooling air conditioning or industrial machinery. Its most important technical indicator is its cooling capacity. To ensure the normal operation of air conditioning or industrial machinery, the cooling tower must, under specified operating conditions, ensure that the surplus heat generated by the machinery is promptly carried away by the circulating working water of the cooling tower. Therefore, the relationship between the cooling tower model and the circulating water pump is closely related.

For example, for a specific air compressor, the normal selection for the cooling tower would be 125 tons. Even with a 150-ton cooling tower, there is still plenty of margin. So why does a 200-ton cooling tower lead to a high temperature alarm for the air compressor? After careful on-site inspection, it was found that the water temperature entering the cooling tower from the air compressor was 50 degrees Celsius, while the water temperature coming out of the cooling tower was 35 degrees Celsius.

Originally, the designed temperature difference for the cooling tower was only 5 degrees Celsius, but the actual temperature difference has reached 15 degrees Celsius. At first glance, it may seem like the cooling tower’s performance has improved. However, this indicates that the flow rate of the cooling water is insufficient.

The insufficient flow rate is definitely related to the circulating water pump. Upon checking the parameters of the pump, it was found that the flow rate of the pump in the system is 100 cubic meters per hour, with a head of 50 meters. In actual operating conditions, the height difference between the cooling tower and the air compressor is approximately 10 meters, and the length of the pipeline is tens of meters. After calculation, it was determined that the actual head required could not reach 50 meters. Therefore, it is inferred that the problem is caused by the excessive head of the water pump.

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