Pump Definition and 655 Threads

Homework Statement A pump is required to lift 800 kg. ( about 200 gallons) of water per minute from a well that is 14.0 m deep and eject it with a speed of 30 m/s a.) how much work is done per minute in lifting the water? b.) how much in giving it kinetic energy? Homework Equations W =...

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Hi all. I am reading a paper about electrohydrodynamic pump and I encounter the following equation. Can anyone explain me the physicl meaning of these two equations? I find no clue in understanding them. The first equation is from the manipulation of Maxwell's equation in an...

what would be a good setup to shoot as much water as possible , as far as possible?

Homework Statement When you look at the manual hand pump, you would push down on a lever and a piston would rise creating a vacuum in the chamber. which would bring the water upward because of atmospheric pressure push the water upward. Now I have two questions about this. My first question...

Hi. I'm a high schooler from Oregon, and I'm in a bit of a dilemma right now. What I'm trying to do is make a 5x5-pin tactile display for a high school physics project. I currently have a Makezine controller that can sink 1A @ 12VDC per analog output, and control 2 stepper motors or 8 servos...

Homework Statement Water is pumped steadily out of a flooded basement at a speed of 5.5 m/s through a uniform hose of radius 1.2 cm. The hose passes out through a window 2.9 m above the waterline. What is the power of the pump? Homework Equations R_v=Av R_m=\rho Av where P is...

Homework Statement It is proposed to heat a house using a heat pump operating between the house (27 degees) and the outside (-13 degrees). The heat loss from the house is 7kW. What is the minimum power required to operate the heat pump?Homework Equations The Attempt at a Solution e=Th/(Th-Tc)...

Air conditioners operate on the same principle as refrigerators. Consider an air conditioner that has 7.00 kg of refrigerant flowing through its circuit each cycle. The refrigerant enters the evaporator coils in phase equilibrium, with 54.0% of its mass as liquid and the rest as vapor. It flows...

I have found a few sites that contains plans for a hydraulic engine that could run itself for a total of nine days. http://www.rexresearch.com/clemengn/clemengn.htm" http://www.keelynet.com/energy/clemindex.htm" Would it be practical to use this as an engine.

hello every one :smile: i don't know if this is really the correct place for posting this question but here it goes!:wink: Can somebody tell me how the venturi metre and the filter pump work? thanx in advance! :blushing:

Hello people, I have a question regarding operation of a water pump. Say, I have a large hot water pump (for purpose of heating) and that pump "pushes" (don't know correct term) water into system. Thers is one big pipeline consist of two pipes (one for sending and one for receiving water). I...

1. North vs. South. A heat pump is designed for southern climates extracts heat from the outside air, and delivers air at 20C to the inside of the houses. What is the average coefficent of performance of the heat pump: (Consider this to be a Carnot device) a) In the south where the average...

Hi all! How do we define the power of a pump? I read a formula from a book which defines the power of the pump as follows: Power of the pump = Maximum back pressure * maximum flow rate / 2 Can anyone explain why the right hand side equals the left hand side? I don't understand why the...

Hello, I cannot figure out which pump or size of pump would fit the need I have. Can you please review the need and recommend a type and pump model/specification that you think would work for this application? I need to have a fluid flow of these specs, I don't have any constraints or...

While in California – the land of air conditioners and swimming pools – I noticed a relatively easy freebee for air conditioners and heat pumps. First. for comparison and perspective, consider that geothermal transfer systems are now used to replace the condenser/evaporator coil in...

Hello All, I am building an ROV and would like to use bilge pumps for the thrusters. I would like to calculate the thrust that a prospective pump is going to create so as to decide which pump to buy. I know that the pump can output 1250 gallons per hour and has a nozzle with a 2" diameter...

Hi guys, could someone help me on this? I'm stuck :( *A motor draws 35kW electricity, it operates at 90% efficiency. The motor is connected to an oil pump which has an inlet diameter of 8cm & an outlet diameter of 12cm. pressure rise in the oil pump is 400kPa. oil enters the pump at 0.1m^3/s...

I have a glue pump system need to operate it by an electrical motor , so don't know how to choose the coupling designation ... may be there are some designation tables or other websites helping for that thing . also if there are some EQUATIONS , about that to depend on . with my best wishes

Hi guys, could someone help me on this? I'm stuck :( *A motor draws 35kW electricity, it operates at 90% efficiency. The motor is connected to an oil pump which has an inlet diameter of 8cm & an outlet diameter of 12cm. pressure rise in the oil pump is 400kPa. oil enters the pump at 0.1m^3/s...

My textbook shows a PV diagram for a steam engine with the pump stage having no change in volume and with only a vertical increase in pressure. How can that be done. I can only imagine pumping a substance by pushing it inwards hence increasing its pressure but also reducing its volume. How can...

Senator Biden suggested this on Meet The Press today: Mandate that every station must have a flex-fuel pump. This sounds like a very tempting idea. Whether the best approach or not, I think we need to set national goals to convert the US to alternative fuels as the standard within ten years...

Please move to appropriate forum if necessary. I need some help. Attached is a pic of my standard 1/4hp Hayward pool pump. I want to enclose it to make it quieter. (The sound is being transmitted by air rather than by physical contact.) As a "proof of concept" I stuffed it in a storage bin...

A water intake at a pump storage reservoir (Fig. 14-44) has a cross-sectional area of 0.87 m2. The water flows in at a speed of 0.35 m/s. At the generator building, at distance D = 180 m below the intake point, the cross-sectional area is smaller than at the intake and the water flows out at 9.8...

Consider a water pump that receives liquid water at 15C and 100kPa, and delevers it to a same diameter short pipe having a nozzle with exit diameter of .01m to the atmosphere at 100 kPa. Neglect KE in pipes and assume constant internal energy u for water. Find exit velocity and mass flow rate if...

In a home heat pump, heat is absorbed from the Earth by a fluid circulating in buried pipes and delivered to the home interior. Suppose that the heat pump is 40% as efficient as a Carnot refrigerator. If the ground surrounding the pipes is at 5`C and the interior temperature of the house is kept...

-------------------------------------------------------------------------------- A pump is to lift 29.0 kg of water per minute through a height of 3.70 m. What output rating (watts) should the pump motor have? An airplane pilot fell 380 m after jumping without his parachute opening. He...

"Pump down" principle A building has a storage room that needs to be cooled. This cooling-system is to be controlled using the "pump-down" principle. I have absolutely no idea what this implies! Anyone...?

A heat pump has a coefficient of performance of 7.05. If the heat pump absorbs 20 cal of heat from the cold outdoors in each cycle, find the heat expelled to the warm indoors. Answer in units of cal. I believe COP (heating mode) : 7.05 and COP = Qh/W Qc = 20 cal so I have to find Qh= ? cal...

A piston pump having a barrel of effective volume 100cm3 is used to exhaust a vessel of volume 2.5x(10^3)cm3. If the initial pressure in the vessel is 1 atm, estimate the reduction in pressure produced by two strokes of the pump, assuming that all processes are isothermal and that air behaves as...

Is the overall flow rate through a closed loop with a pump constant? I've always though that if a pump can do a specific amount of work, it doesn't matter if the 'loop' of tubing goes up and down, or what types of turns it takes. I've thought this because if the tubing goes down then up (or...

I'm having real trouble understanding the working process of a heat pump. A liquid with a certain temp flows in a system and gets vaporized, then it is compressed so that pressure and temp increase. Then it is cooled by a substance with lower temp so that it becomes a liquid again, and this...

how would you make 1000 tons of water go all the way up 10 km and then down again with no friction? have you heard about a tiphon? your toilet has one, you would make use of that principle if you wanted to take gas from a car deposit with a plastic tube with an ideal fluid you could make...

I have been working on this problem for 2 days and can't seem to figure it out.. A 1500hp pump throws a jet of water 125 m into the air. (a) With what speed does the water leave the mouth of the fountain. (b) If the overall efficiency is 60%, how many liters of water per minute are thrown...

The cylinder of a pump has a 6 inch diameter. The stroke is 8 inches in length with 200 strokes per minute. Find the output of the pump in gallons per minute.

Not sure if this is in the right topic, but does anyone know the difference between a fan and a pump? I'm working on something where I need to distinguish a fan from a pump. I need to do so without limiting the pump to any specific type. Basically I need to allow for a piston & cylinder type...

Does anyone have any ideas on how to construct an electromagnetically actuated micro pump? If so, please post.

these are following information given: 2 cylinders with diameters of 50mm and 150mm are connected. specific gravity of oil=0.8 then on top of the cylinder with the larger diameter is a 500kg mass. so the question is on what is the force required on the smaller diameter? another information...

U.S. checking possibility of pumping oil from northern Iraq to Haifa, via Jordan By Amiram Cohen The United States has asked Israel to check the possibility of pumping oil from Iraq to the oil refineries in Haifa. The request came in a telegram last week from a senior Pentagon official...

A perfectly reversible heat pump heats a building at 20deg from the atmosphere at 5deg. If the heat pump is run by an electrical motor whose efficiency is 80%, what is the cost of 1KWhr of heat supplied? (1KWhr of electricity is 6p) I am confused by this qn as I thought the efficiency, e =...

This question is killing me because I just can't seem to get it. A heat pump is used to heat a house in winter; the inside radiators are at T_h and the outside heat exchanger is at T_c. If it is a perfect (e.g., Carnot cycle) heat pump, what is K_pump, its coefficient of performance? Give...

This is the diagram of the mechanical system that i want to calculate the pump and the full Hydraulic system for it ... calculating of pressure and the pump pressure and the electriacal motore for the that H. Pump for holding the coil

Hi... I've seen a lot of tractors, they seem to have a shiny aluminum on their arms.. Are those pumps?? What are the advantages of using them? And how to configure them, do they power by motor? Please explain in details, thank you.

Air pump is pumping out a gas from a vessel (vessel's volume is V). After each cycle i it pumps out dV. Gas is ideal. T=Const. After how much cycles pressure P will decrease k times? Here is my work. PV = nRT Initially n=n(0) After each cycle n decreases (1-dV/V) times. So, after x...

I figured out how to modify (weaken) a Hurricane and prevent tornados with a pipeline while using the rotational velocity of the Earth. Actually, the Earth is a Giant Pump.Gravity is greater at the poles of the Earth because the Earth is not spinning with as much velocity. This why you would...

can someone give me some clues or help as to how I'm supposed to go about solving the following problem? my professor has not covered any of the material from this chapter, so i have no idea how to even start this. the question is: the motor on a water pump is rated at 6.6 hp. from how far...

Here's my problem: A heat pump cycle whose coefficient of performance is 2.5 delivers energy by heat transfer to a dwelling at a rate of 20 kW. a) Determine the net power required to operate the heat pump, in kW. b) Evaluating electricity at 8 cents per kWh, determine the cost of electricity...

Dear ... Please Try To Read Those : I have This System Of Water Pump Consist Of An Electrical Motor And A Water Pump For Lifting Water From An Underground To The Upground ... In A Factory Using This Pumped Water For Cooling The Iron That Produced Form The Rolling Machines ... (( Open...

I'd like to put a valve (like the ones on tire tubes) that will connect to a bicycle pump onto a PVC tube (on the side, or at the end). Anyone know how I can do this? What fittings will I need? Thanks.

Need to know the formula that i can use it to choose Water Pump ... or suitable ((( Water Pump ))) For any water pip line if i have known water tank capacity if i have two water reservoirs and need both to not to reach empty conditions