May I ask which is better, having pumps connected in parallel or using a single pump?
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We need to install a cooling tower. At present, the flow rate seems high; the total water volume is around 1,200 cubic meters. The water is distributed in two areas, north and south, with different areas that use water, and these areas are separated by more than 100 meters. We are considering whether to combine all the water usage points together and choose a cooling unit with a capacity of 1200 cubic meters, or to opt for separate units with capacities of 400 and 800 cubic meters each. At the same time, we also need to decide whether to purchase one pump with a capacity of 1200 cubic meters, or six pumps of 200 cubic meters each, or three pumps of 400 cubic meters each. The same goes for 800 cubic meters – should one buy a unit of 800 cubic meters or four units of 200 cubic meters each? The manager asked me to calculate the economic viability of operating this set of equipment, focusing mainly on the operational costs such as electricity bills and maintenance expenses. I’m also a beginner; could some expert give me some advice? I’d like to know the advantages and disadvantages of using them together versus separately, so that we can consider all aspects before making a decision. Thank you.
It’s safer and more energy-efficient to opt for multiple units; you can run several while keeping one as a backup
What was said on the 2nd floor makes a lot of sense. What is your minimum order quantity? If they are combined into one tower, what will be the minimum load of that tower?
First, you need to consider your operating conditions and the importance of the pump – is there any change in flow rate? Under normal circumstances, one unit is in use while another serves as a backup, balancing cost efficiency and operational safety. Speaking purely of energy savings, this means not using a backup pump – only one operating pump is needed. If configured as 2 in use with 1 as backup, the operational economy will be slightly worse than that of 1 in use with 1 as backup, but it is more suitable for situations with varying operating conditions.