Physics Help Forum Need help with a pump chart

 Thermodynamics and Fluid Mechanics Thermodynamics and Fluid Mechanics Physics Help Forum

 Jan 9th 2019, 03:24 PM #1 Junior Member   Join Date: Jan 2019 Posts: 1 Need help with a pump chart Hi! I need help with a task, it goes like this: So, here is the problem: I need to create a water system for cabins. the water system consists of a tank (see picture) with different outlets for pipes and one or two pumps that will provide the supply of water to the cabins. the tank is 20 m lower than the cabins. The water should be pumped upwards. The estimated water consumption is 350-500 l / per day. Make a simple drawing of the water plant with the cabin field. Find a suitable pump that you would recommend for the transport of the water to the cabins. depending on the distance from the tank to the cabins and the number of cabins, it may be necessary to use 4 pumps as there are 4 cabins. maximum distance from the water plant is recommended and should be found. attach documentation to the selected pump and indicate which assumptions and choice of pump is based, that is why you have chosen that pump. The pumps are selected from a website that I have the link for. And to find the right pump, I have to use bernoullis equation and use pump performance curve (I have a model in Excel for that)
 Jan 9th 2019, 08:43 PM #2 Senior Member   Join Date: Apr 2017 Posts: 499 A diagram would be helpful... I don't know how this question arises , but the person who posed it understands nothing about water supply .... The tank is always positioned above the outlet (cabins) ... for many reasons ... When the tank is lower, the person in a cabin opens a tap ... How does the pump know to switch on to pump the water up ???... the question gives the consumption per day ... this is irrelevant , what is relevant... is how quickly the cabin needs water to be delivered ... Re design the question with the tank above the cabin and all these , and other, problems are solved. topsquark likes this.
 Jan 10th 2019, 01:54 AM #3 Senior Member     Join Date: Jun 2016 Location: England Posts: 963 The Main Tank may be lower than the outlets, I would suggest you use a (smaller) header tank above the outlets. A simple ball valve in the header tank can trigger the pump from the (low) main tank to the (high) header tank. The water can then be gravity fed from the header tank. topsquark likes this. __________________ ~\o/~

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