Is a hydraulic system a form of a power source?
922773
Hydraulic power is not a power source.  There is no energy storage in a hydraulic system.  Power sources like batteries with electric motors or an internal combustion engine with a gas tank are power sources because they can store energy for use at a later time.\n\nThe great thing about hydraulics is the very high power density (lots of power in a small space) and the flexibility in having both linear and rotary actuators.  The main drawback (at least for me working in robotics) is the need for a real-time continuous power input to run the system.
60060
At times it is necessary for a process engineer to choose between a pneumatically or electrically actuated valve for a system. There are advantages to both styles, and it is valuable to have data available to make the best choice. \n\nCompatibility (Power Source) \n\nFirst and foremost in the selection of an actuator type (pneumatic or electric) is to determine the most effective power source for the actuator. Points to consider are: \n\n\nPower source availability \nTorque at the valve stem \nFailure mode \nControl accessories \nSpeed of operation \nFrequency of operation \nPlant environment \nSize of valve \nSystem component costs \nSystem maintenance \nThe most practical pneumatic actuators utilize an air pressure supply of 40 to 120 psi (3 to 8 bar). Generally they are sized for a supply pressure of 60 to 80 psi (4 to 6 bar). Higher air pressure is usually difficult to guarantee and lower pressures require a very large diameter piston or diaphragm to generate desirable torque. \n\nElectric actuators are often used with a 110 VAC power supply but are available with a wide variety of AC and DC motors in single phase and three phase. \n\nMORE INFO AT THE WEBSITE
341744
The easiest example would be to turn on a electrical pump motor. By toggling the switch, it sends electrical current to the motor. This causes the motor to turn, which changes the electrical energy to mechanical energy and then turns the pump, which will then move fluid (Hydraulic Energy).
1169017
A voltmeter and an ammeter will provide the input power. You will need some form of dynamometer to measure output power.\n\nOutput power divided by input power yields efficiency.
344556
JetDoc is correct in his answer.  \n\nYou should keep in mind that hydraulics uses liquids that are considered non-compressible, while pneumatics use gases which are compressible.  Hydraulics are generally used for applications that require higher pressures.  For example, hydraulics are used for elevators, bulldozer blade adjustments, and the brakes on your car.  \n\nPneumatics are more often seen in lower pressure applications such as actuators on valves and controllers.  (Although you also see pneumatic brake systems).  \n\nThe reason for the difference in applications is due to the difference in compressibility between the two media.
139357
Hydraulic technology relies on the fact that liquid, unlike gases and solids, cannot be compressed. Put some water in a bucket and try to push it down. Right—it can't be done. The water is displaced. Imagine an apparatus made of three components: a reservoir divided into two sections (one small, one large) with a passage between the two sections. In each section is a piston. If you fill the reservoir with fluid and then apply pressure to the small piston (called a master cylinder), the large piston will rise.
741176
DC is battery and they do not generate a current. They store energy for use upon demand. They also do not store enough energy to maintain transmission for long periods.
123225
electricity or power obtained from moving water\nmainly from dams and tide power plants
884089
You are confusing terms, amperes are a measure of current - charge per unit time. The closest thing to pressure in electrical terms is voltage, that is what drives current. Can we harness amperes? yes, we already do. Can we use it to make more electrical power? no, that would violate conservation of energy.
87578
P = EI (Power equals voltage E times current I)\n\nMany electrical properties can be explained as analogous to water flow.  For example, a transformer "transforms" high voltage and low current into low voltage and high current, keeping the power constant (except for minor losses) at full load.\n\nThis would be equivalent to a high pressure water pump supplying low water flow to the primary winding and taking out high water flow at low pressure from the secondary winding to drive a low pressure water turbine.\n\nYou could represent the transformer core as a hollow square of wood or even thick cardboard.  On one side wrap say ten turns of thin clear plastic tube around the core to represent the primary (first) winding.  On the other side wrap say five turns of larger diameter plastic tube around the core to represent the secondary (second) winding.  Fill the primary tubing with water and red food coloring to represent "hot" high voltage and the secondary tubing with water and blue food coloring to represent "cooler" low voltage.\n\nThe explanation of course is that the high voltage primary winding will have more windings of thin tube (similar to more thinner copper wire windings) because the current will be less than in the secondary winding.\n\nThere will be less windings for the secondary coil using larger tubing because the current will be higher at low pressure.\n\nSupply the secondary tube with a shut off valve (or clip) to represent the fact that there will be no current unless the circuit is open.  In the formula, if current is zero power is also zero (on both sides of the transformer).\n\nYou can represent the pump and turbine with pictures (or drawings) of same but it would not be impossible to rig an actual pump and turbine, just not necessary to "see" what is happening.\n\nThe turbine can use up more and more power until the maximum power of the primary winding is reached but not more.  The magnet of the core will be "saturated at full power."\n\nThe rest is explaining magnetic flux in the core and how it is produced by the primary winding and cuts through the wires of the secondary to produce voltage and current if there is a load.  Each winding of a coil adds to the effect.  A transformer with equal primary and secondary windings would have the same voltage and current under load.  I believe that the phase would shift 180 degrees because of lead/lag.   Good luck.
1051362
Unless you have a way to measure the output torque, any method you use will be an estimate. \n\nIf all you want is an estimate and there is a way to determine or estimate the load requirements of the driven equipment then you have a chance. \n\nAs an example:\n\nIf it is driving a 100 gpm water pump with a known efficiency and flow rate you can measure the differential head, then it is possible to estimate the load requirement of the pump and therefore the output of the motor. Be careful, efficiencies and flow rates can vary with head requirements.
751409
Depending on your sign convention, power can be negative, but it's no longer power being produced, but power being consumed, instead. Or vice versa, again depending on your sign convention (ie in thermodynamics, positive power is power being produced, but in circuits, positive power is power being consumed).
1093037
Yes.\nAll Hydraulic machines work on pascal's law.\nchk this out\nhttp://en.wikipedia.org/wiki/Hydraulic_machinery
818618
An Hydraulic lift, is a lift that works by using hydraulic oil to raise and lower it,an hydraulic ram is fitted to the under side of the lift. Other lifts work by means of the traction sheave driving the lift car up and down. An Hydraulic lift is not as fast as normal lift, but can take greater weight, and the other thing about an Hydraulic lift is that the lift motor room can be remote from the lift shaft unlike a normal lift.
260861
Think of the analogy between the flow of electricity and water where voltage is pressure and current is water flow.  It take voltage (pressure) to cause current (water flow).  Therefore, current (water flow) will occur in the direction under greatest voltage differential (pressure).  Because you may be working with more than one voltage source (two transformers or ttwo battery cells?) one of the sources may be adversely affected.  Are you working with AC or DC?  You may need to avoid connecting a circuit for example that would be like charging a car battery with the leads reversed.  Good luck.
947820
Hydroelectricity is electricity obtained from hydropower. Most hydroelectric power comes from the potential energy of dammed water driving a water turbine and generator, although less common variations use water's kinetic energy or dammed sources, such as tidal power. Hydroelectricity is a renewable energy source.\n\nThe energy extracted from water depends not only on the volume but on the difference in height between the source and the water's outflow. This height difference is called the head. The amount of potential energy in water is proportional to the head. To obtain very high head, water for a hydraulic turbine may be run through a large pipe called a penstock.\n\nWhile many supply public electricity networks, some hydroelectric projects were created for private commercial purposes. For example, aluminium processing requires substantial amounts of electricity, and often dedicated hydroelectric projects are built to serve aluminium electrolytic plants. In the Scottish Highlands there are examples at Kinlochleven and Lochaber, constructed during the early years of the 20th century. In Suriname, the 'van Blommestein' lake, dam and power station were constructed to provide electricity for the Alcoa aluminum industry.\n\nIn parts of Canada (the provinces of British Columbia, Manitoba, Ontario, Quebec and Newfoundland and Labrador) hydroelectricity is used so extensively that the word "hydro" is used to refer to any electricity delivered by a power utility. The government-run power utilities in these provinces are called BC Hydro, Manitoba Hydro, Hydro One (formerly "Ontario Hydro"), Hydro-Québec and Newfoundland and Labrador Hydro respectively. Hydro-Québec is the world's largest hydroelectric generating company, with a total installed capacity (2005) of 31,512 MW.\n\n\n\nfor other facts go to \nhttp://en.wikipedia.org/wiki/Hydroelectricity#Hydro-electric_facts
948165
There have been proposals and designs for wave-generated electricity.  It is not the same as dams and is more difficult because of the variability of the wave motion.  I think the reason it hasn't  been done is that the mechanisms are expensive for the amount of power that can be obtained.