Seeking advice on choosing a pump with a head of 300m and flow rates of 25 cubic meters per hour or 350 cubic meters per hour It would be great if there were manufacturers!
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This post was last edited by zhl009 on 2011-4-9 at 22:49. As the title suggests, I’ve come across two designs recently that require a similar head height of 300 meters, but the flow rates differ significantly. A 350-cubic-meter pump can indeed be divided into two pumps to handle the task. But we all require that the flow rate be adjustable within a range of plus or minus 10%, no matter what methods are used, whether it’s variable frequency or control loops. It is required that the liquid not generate too much heat after passing through the pump, otherwise the cooling system downstream will not be able to handle it. Moreover, adjusting the flow rate must not affect the head pressure; if the head pressure is too low, it will be impossible to inject high-pressure gas. It is also necessary to ensure low operating costs, and of course, the cost of construction should not be exorbitant. This problem is driving me crazy. Could someone recommend something? It would be great if it comes from a specific manufacturer – I don’t know which one to choose; products from abroad are also fine! ! ! ! Thank you! ! ! Additionally, there is another issue: the high-pressure liquid after being pressurized needs to have its pressure reduced. During this pressure-reduction process, we want to use a hydraulic turbine system – is there one that can be used in conjunction with pumps? Is it appropriate to use a turbine for power generation, or is it better to combine a turbine with a pump?
Could the original poster provide the critical value for the minimum required head?
I’ve recalculated it; the minimum required head is 308 meters. For now, it’s better to use the hydraulic turbine system for power generation in order to compensate for the energy consumption of the pumps.
It can be completely recycled! Alternatively, a recirculation scheme can be used; frequency conversion cannot solve the problem!
1. Adjusting within the range of +10 and -10 can be achieved through either the system circuit or frequency conversion; personally, I would recommend using circuit adjustment, as the cost of frequency conversion is relatively high. 2. I’m not sure how much the temperature cannot rise – what exactly is that limit? Twin-screw pumps exert little compression on the liquid, so the temperature won’t increase significantly. Liquids that require cooling can also be cooled using a jacket cooling system. 3. Twin-screw pumps have high volumetric efficiency, are energy-efficient, and incur low maintenance costs over time. These are my personal opinions for your reference. Our factory is one of the earliest professional manufacturers in China to produce screw pumps (we were involved in formulating the GB/T10886-2002 standard)
This post was last edited by zhl009 on 2011-4-28 at 15:51. I’ve been busy with other things lately and haven’t had time to check the posts. The temperature rise doesn’t exceed 5 degrees. I was inspired by everyone’s replies; I’ll get in touch with you by phone later