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Questions tagged [water-pressure]

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Why does pressure regulator on garden hose jump from 60PSI to 135PSI when pressure washer sits idle for a couple of minutes after use?

There's a pressure regulator on our garden hose spigot. When the valve is opened with the hose nozzle closed, it reads 60psi. I attach the garden hose to a 2700psi electric pressure washer. After using the pressure washer for several minutes, I…
Tim
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Pipe size selection for seawater circulation system

I am trying to get the right pipe size for seawater circulation system aboard a ship. The water is used to keep oysters alive while transporting them. The system has 8 Ebara SQPB 100 pumps. The output of each pump is theoretically 1.2 m3 per…
SV Savannah
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Ship Stability And Overturning Moment

Here a ship that is tilted due an external force . the buoyancy and weight force will create an overturning couple that will rotate the ship in the clockwise direction. Now, the moment equation was defined as Fb*d : where Fb is the buoyant force…
Jesse Flynn
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Would this large scale "bubble pump" actually work?

I have read about bubble pumps which work by heating water causing a phase change, the water passes through a one way valve and condenses thus pumping water. Would this work at a larger scale as in my diagram below, or would the nature of the phase…
Jan Martin
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Calculate pipe size and friction loss for an agricultural project's water system?

I'm in the process of designing a water system for our regenerative agricultural project in the Horn of Africa. I'm looking to install a ≈1000L water tank on a 3 meter stand which will gravity supply a secondary ≈1000L water tank ≈320 meters…
Jonathan Ciccarone
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Can saline water be used in a hydro storage system and would the ambient temperature or higher liquid viscosity affect performance?

In regards to this question: How to determine the efficacy and potential energy of hydro power energy storage?. I'm searching for a cheap liquid that I can use for a small scale pumped hydro storage. Obviously water came to mind but that has a…
Bob Ortiz
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How to determine the efficacy and potential energy of hydro power energy storage?

The project I'm thinking about building a cheap DIY hydro energy storage (like a battery) system. I can build it but so far I can't really figure out the calculations to validate my idea and where to start mathematically. I'm considering doing a…
Bob Ortiz
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ELI5: How does this water (solenoid) valve work?

I took apart this hose faucet timer: When unpowered the valve is closed. When powered (either manually or by timer) it opens allowing water to flow through. I am attempting to learn how the open/close valve mechanism works. From some research I…
n00b
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User-settable pressure-relief valves for outdoor domestic water supply lines?

Is there such a thing as a pressure relief valve which can be attached to garden hose bibb threads that would relieve backpressure from a pressure washer, in order to protect old pipes and reduce the chances of backflow into the potable water…
Tim
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Water flow measuring device for a simple ceramic water filter

I am looking for a solution that would allow me to measure water consumption from a simple ceramic water filter device (see picture below). The meter must be relatively cheap, work without being plugged to the electricity, and be able to to measure…
Caserio
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Calculating the external force applied using deformation information for a balloon filled with water and initial force by walls of balloon

In my experiments I am filling a 10inch rubber balloon with 600ml of water and then applying compressive force downwards and then recording pressure and flow. I would like to know how much external force I have applied. I know the radius of the…
Faridat Abdulsalami
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Most efficient electricity generation in a wide flow of water

I'm wondering what the best method is for generating electricity in a wide river. The assumptions here is that it's a strong flowing river. It is very wide and we're allowed to put an electricity generating device in the middle. It may not restrict…
Trioxidane
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Calculate steam flow rate with pressure difference

So I have a 4-inch pipe with a pressure of 1.5 bar drop to 1.01325 bar, with a temperature of 120 degrees Celsius. How can I calculate or estimate the steam flow rate for this system?
Johnny Song
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Controlling/regulating water flow in a vertical pipe

In the image above, the 2nd pipe is used to dispense water. Only so much of consumed water flows down in the pipe. Hence there must be some mechanism used to hold the water in the pipe and allow water flow in a regulated manner. What could that…
nagu
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Water temperature control unit - what is the need for cold supply pressure?

A typical industrial water temperature control unit. Image source: Frigel. Our company uses water temperature control units (TCU) similar to the style shown above. Ours have an electric immersion heater to bring the water up to temperature and an…
Transistor
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