0
How can the hot water be at a higher pressure than the cold mains in an unvented system?
Wiki User
∙ 16y ago
Pressure temperature relationship will tell you all you need to know
Wiki User
∙ 16y ago
Add your answer:
Earn +20 pts
Which is more powerful a torch bulb or a mains filament bulb?
Mains filament
You can fill a bucket from a downstairs tap quicker than from an upstairs tap?
You can do this because it takes more pressure from the pipe to flow water to the upstairs tap than the amount of pressure it takes to flow water to the downstairs tap. This is clear in Bernoulli's Equation: The fancy-looking p (pronounced rho) in the first two terms represents the density of the liquid, v represents the velocity in which the fluid is traveling, g is the acceleration due to gravity (appx. 9.8m/s^2), and z is the difference in height traveled by the fluid, the final P represents the atmospheric pressure (101.3 kPa). As you can see, as the value of variable z decreases, it allows for the only other variable, v, to increase. This explains why, at a higher elevation and a constant force applied to the fluid, water will flow faster at a lower height than a higher point. EDIT: It won't let me add an image for some odd reason, search Bernoulli's Principle and look for the phrase, "By multiplying with the fluid density", and reference the equation underneath for a more complete understanding of what I just said.
What wave shape of the mains supply is know as?
Sine wave
Explain how fluids exert pressure?
The only difference between the way a fluid exerts pressure and the way a solid does is that a fluid flows into any available space, and so it exerts pressure very evenly. If you want a more detailed analysis, ultimately physical matter exerts pressure by means of the electrostatic repulsion between electrons.
What is a power pack used for?
It all depends in what context. Electrical power packs usually convert mains power to a lower voltage by use in electronics. A mechanical power pack can refer to an electrically driven hydraulic pump for supplying a hydraulic system.
What is hydrophore system?
A hydrophore system is a system comprising a powerful pump unit and a pipeline that is designed to increase the pressure of water from the urban mains so that water can be supplied to the higher storeys of a tall building.
What is the velocity of an average shower head?
The velocity does not depend on ther shower head, however it does depend on the cold mains pressure, a higher pressure will result in a higher velocity, and visa versa.
How do you reduce the water pressure in your house?
How to reduce your water pressure to your taps if you have a high mains pressure or an unvented cylinder such as a megaflow, boilermate ect. Reducing water pressure in your home can be done in several ways, my video demonstrates a few. Some people turn down the isolation valves or main stopcock which is not advisable, as it can produce noise, water hammer in pipes /taps and can damage the valves and stopcock.
What is service mains in power transmission system?
A 'service mains' is not associated with an electricity 'transmission' system, but with a low-voltage 'distribution' system. The service mains is the name given to the cable that connects a building to the low-voltage mains supply.
What element has cable for a ring mains at 230v or higher?
the answer to this question is copper
What is water pressure caused by?
In a typical municipal water system, water pressure is caused by gravity. It works like this: Water is stored in a reservoir which could be underground or above ground. From here it is pumped through a filtration and treatment system, then into tall water towers. From these towers it is gravity fed to the water mains under the street that supply water to the houses, shops and factories. The reason for pumping the water to a tower first, and not directly to the mains, is to avoid fluctuations in pressure during periods of high and low usage. In a rural or cottage system, there is often no buffer tank, so the pressure fluctuates up and down constantly as you use the taps.
What are the 2 mains organs of circulatory system?
The heart and lungs
What are force mains?
Force mains are pipelines used to transport wastewater counter-gravitationally (i.e. from lower to higher point). They must include some pumping device, and often are pressurized.
How do you wire three phase into the mains?
In the UK, the term, 'mains', refers to the supply voltage provided by the distribution system. In most residential properties, the mains' supply is single phase (there are exceptions: some European countries have three-phase supplies), in which case you cannot 'wire' a three-phase load such as an induction motor into the mains.
Will the pressure increase or decrease if you put a half inch restriction in a three quarter pipe?
Neither Pressure re mains the same the VOLUME changes along with the VELOCITY
What causes low water pressure in the house?
There may be a number of causes. First, check your PRV and see if you can adjust it to higher pressure. This is usually easy and may solve your problem. If new construction has gone up nearby, mains pressure may be lower. Also remove and clean all aerators and see if that makes a difference. Many people totally ignore this basic step.
Can you use a gravity fed heating system if mains water is off?
If plumbing is not a factor for your gravity fed heating system , then yes.
