Pump Definition and 621 Threads

Homework Statement A heat pump has a coefficient of performance of 3.70 and operates with a power consumption of 6.91 103 W. (a) How much energy does it deliver into a home during 1 h of continuous operation? 9.2x10^7 J (b) How much energy does it extract from the outside air? ? JHomework...

Introduction Lately, i have been attempting to develop a better understanding of thermodynamics, but i have encountered a few problems. I considered that endothermic solvation, (e.g. dissolving KNO3 in water) is essentially the same as an absorption heat pump. This idea was based on the...

Hey. I've been trying to find a really small, micro water pump, direct current, in-line 2.5"x1.5" maybe slightly bigger, but preferably tubular in shape and as small as possible. Looked on ebay to no avail. Any ideas? It has to be cheap as well, something under $50. Oh and 1-2 GPH flow...

Hey just wanted to know the theory behind this. If i have a open reservoir say 20 ft above a pump and i want to pump the water that flowing down on the suction side to a reservoir on the discharge side 80 ft above, the static pressure from the suction reservoir should decrease the pumps work,but...

Hi I am trying to determine the power usage of a progressive cavity pump in an oil well setting. I have some data to analyze, where I know the amount of viscous rod torque (ft lbs) per 1000 ft of rod length, I can use various rod lengths, and I know the RPM. Calculating the total Rod Torque I...

How does the water pump inside a steam iron work?

Hi Guys, I have a problem about the starting current of a pump's electrical motor. I have the working condition of the pump (torque, power, speed, P and Q) But how could I calculate the start up current of an IEC standard motor? Seems I has to gather a Torque-speed curve from the...

I am researching ground source heat pumps, however I do not completely understand how they work. I understand that a pump uses a small amount of electricity to pump heated ground water or an antifreeze solution through the a system of piping in the ground to transfer heat from the ground to a...

1. A tank is formed by revolving y = 3x^2, x = [0,2] around the y-axis is filled to the 4 feet point with water (w = 62.4 lb/ft^3). Find the work necessary to pump the water out of the tank over the top. I got the integral being from a = 0 and b = 4 and integrating [(12y-y^2)/3]dy with w and...

Homework Statement Find the work done in pumping all the water out of a conical reservoir of radius 10ft at the top and altitude 8ft if at the beginning the reservoir is filled to a depth of 5ft and the water is pumped just to the top of the reservoir. Homework Equations None The Attempt at a...

So, this seemed most appropriate for this forum, as it's essentially a question about pumps, pressures, and fluid mechanics. The set up I have that this question pertains to; There are two pumps that have lines running to a T-joint with a small chamber to allow for mixing before exiting...

is there any equations that can be used for calculating required pump pressure for a horizontal running water pipe given the pipe length, cross-sectional area, required flowrate and frictional loss co-efficient?? is this possible or is more information required?

Homework Statement I am having trouble with calculating the required pump pressure in a horizontal water pipe, 3Km long. i know that the flowrate is 600Kg/s, average velocity 5.6m/s, cross-sectional area of pipe is 0.107143m^2 and losses due to friction average 0.002 per meter Homework...

When I am dealing with dipole radiation, I faces a difficult problem. Is the phase of the radiation the same as pump wave?

I've come across seal pumps in a few power plant diagrams recently and I'm confused on what a seal pump actually does. As it was explained to me, the seal pump pumps water into/around a primary pump to seal the primary pump from leaks. However, something seems to be missing from this...

Homework Statement A pump has to raise water from a depth of 50m and eject it at 10m/s. If the flow rate is 2 kg/s, what horsepower is needed. Homework Equations The Attempt at a Solution t = s/v = 5 seconds m = t/flow rate = 2.5kg E = mgh = 1250J P = E/t = 250W...

please help me ,i have a project which i m not easy with can anyone help me in designing a a vapor compression cycle for cooling in the summer and if desired heating in the winter, and a ground source heat pump for cooling in the summer and if desired heating in the winter.

I have been planning a heat exchanger for my pool for quite some time. I'd like some reco's about pressures and pipe diameters. See attached diagram. The pool hose is 1 1/4" flexible PVC hose like this: http://www.poolsupplies.com/images/products/tn_105550.jpg The pump is a standard...

hello everyone, i run a small microbrewery and i have a need for a unique pump design, here are the requirements: 1) low agitation of pumped liquid (cider in my case) because its full of CO2 in suspension and i don't want the gas to come out in the pump 2) the pump will be used to mix 2 fluids...

how can i obtain the pump flow rate ? is this done by filling a certin volume and measure time or there is another method ??

how to obtain a centrfugal pump curve ? and how can say from the sound of the pump if its running under cavitation or not ?? and what's the cavitation signs for the pump

gear pump cavi ? well dear all we know that gear pump is a positive desplacement pump which has constant dioscharge at different loads my problem is i need an explanation to this sitiuation " from 1 month at my work i found a breakdown of lubricating pump used to pump oil on a bearing it...

a tank the shape of a cylinder has base radius 3/2 m and height 6m lies horizontal and has a spout of length 1m. Find the work to pump all of the water out of the tank. placing one end of the tank at the origin and using rectangular cross sections. I have attempted to first calculate the...

I am about to pour a concrete floor in an addition to my basement (about 13' x 24'). This room is adjacent to my electric water heater. I have bought a 9500 btu R-22 compressor which I plan to use to replace the electric element in my 50 gallon water heater. The condenser is the water heater...

I have to design a micro pump which uses a magnet as a plunger. the magnet is pushed and pulled by and electromagnet whose current can be controlled. I wanted to know that how do I relate the current in the electromagnet to the amount and flow rate of the fluid expelled by the pump. The...

Efficiency of Ejector "as pump" I was asked to find the efficiency of a steam ejector experiment "as a pump". So I tried the formula : [(m(P/density + V^2/2))discharge - (m(P/density + V^2/2))suction]/ (m(P/density + V^2/2))steam inlet. I am getting an efficiency of 0.5%. Is this a...

An aquarium 2 m long, 1 m wide, and 1 m deep is full of water. Find the work needed to pump half the water out of the aquarium. (The density of water, p, is 1000 kg/m3, and acceleration due to gravity, g, is 9.8 m/s2.) So in order to truly understand how to do these kind of problems I decided...

Homework Statement Why do diarrhea patients receive a solution containing a high concentration of glucose and salt?

Hi all, I am currently working on a water pipeline project and am investigating a pipe burst scenario at a pump station with the aim of producing a flow rate entering the pump room in the event of a burst. For simplification and what has been used previously on similar jobs is to model...

Hi All, i have a requirement to design a pump to pump 4000 litres of water a day at 40 mtr. head. which pump will be most suitable for this application and cheap?? can anyone of you help me in this subject ? and also where can i refer to design that particular pump? thanks in advance...

hello guys here's another question my pump not pumping liquied althoug the pump is under the tank why ?

Alright, so here goes, and by the way, this isn't homework, just in case you're wondering. Question 1: So, i have a 12vdc 500amp battery/car inverter and a 12vdc 11amp sump pump. If I wire it up, approximately how long will they last? Question 2: Also, I have a power inverter for my car, can I...

A right cylindrical tank is filled with sea water. The tank has a radius of 2 feet and a height of 8 feet. If the water level is now 2 feet below the top of the tank, how much work will be required to pump the sea water to the top of the tank? (The weight-density of seawater is 64 Ib/ft3.)...

Folks, I am looking for a blower to produce a flow of ~150cfm (~4m^3/min) while pumping H2 pressurized at ~40bar. The blower needs to provide a pressure increase of ~5bar. I am wondering if something like a supercharger blower might work.

This may seem like a stupid question, but what is the relationship to flow and pressure in a pump to flow and pressure in nozzles. Specifically i have 5 nozzles that i am pumping into rated at 3000 Psi @ 0.84 GPM, what do i size my pump to? Do i need a pump rated for 3000 Psi @ 4.2 GPM or do i...

Hi all, I have the feeling I'm missing something big. Consider first a capacitor having +9V on both terminals, in this case nothing happens. Now I set the negative terminal to 0V, and make sure a current is able to flow; the capacitor will now charge up to 9V, right? Ok, now I make sure...

Sirs, I need to make a pump to draw molten aluminum from one container to another container. The first container height is 1.5m. I wish to us a screw enclosed within a cylinder and powered by a motor. Can anyone help me with the detail design of the screw and cylinder? I welcome any other design...

I'm confused how a magnetic pump works as described in my text. I'll quote: """Liquid metals, such as the molten sodium used in certain nuclear reactors, can be moved through pipes using an electromagnetic pump that has no moving parts. If the metal has to be moved in a pipe that is...

Ok I searched and found this as the answer from a previous topic "The sodium potassium pump is required to maintain osmotic balance and stabilize the cells volume. If you treat an animal cell with ouabain, which inhibits the Na+/K+ pump, it will swell and often burst. Cells contain mostly...

Can anyone please help me with this problem? Consider the act of evacuating a chamber with a vacuum pump. Vacuum pumping rates are usually given in volumetric pumping speeds, Sp, whose units are typically volume/unit time, e.g., 1 m3/min. In other words, the number of molecules in 1 m3 at...

I am doing a project of hydraulic vehicle. My professor ask our team to install a hydrualic pump and motor in the vehicle. We are considering to purchase a set of hydraulic pump and motor, and we have the following requirements: We have an existing electric motor of 22kW, 60Nm (continous)...

We live in rural area and get our water from a well. Due to the high iron content in the water, beyond all of the normal considerations for purity, chlorine [bleach] is required to react out all of the iron. For years I used diaphram-style pumps that had a life expectancy [based on my...

urgent: mini pond/fountain pump workings Well, it's not life-or-death but, I've got a deadline for tomorrow to finish this thing I've been working on for months and I've just came bang up against what might be a showstopper. I'm building a pond widget that is powered by an 11W mini pond...

In many paper or book on laser, it is quite oftern to mention the pump and probe field. I understand what the pump field is, but what about the probe field? What we need a probe field? How does it work (how to "probe")? And why a probe field is always a weak field?

Hi If a vacuum pump is operated on a test container (say at 150 degree C) and as a result at the outlet,water is condensed and collected. What would be the relation between Vacuum deviation in the test container and quatity of water extracted. Is it to do with Ideal gas equation, PV=nRT...

I hope I am asking this in the right forum. Lets say you have a simple hand pump, similar to a bicycle pump, and you exert X amount of force on the handle. How do you calculate the resulting air pressure it creates out of the small valve at the end? Obviously friction between the O-ring...

Hey guys im in the process of designing a piezoelectric liquid pump, i am looking to make the structure out of RP printer for now and use a PDMS diagrphram for the piezo device to be mounted apon. Have any of you guys worked with piezo materials before as i am in need of a strong high...

If anyone here has experience with hydraulic hand pumps(those 10000 psi models), could you tell me how hot the oil, and by extenstion the pipes get during compression?

i need to find a way to control the syringe pump in my lab so that i can control the flow rate in real time from the computer, ideally from a simple dial i scale up or down. the pump can connect to the computer using a rs-232 port and someone suggested to me that labview would be the easiest...

Here's the situation. We have tried to replace a "non-clogging Submersible" pump that has been in service for 20+yrs and are experiencing catistrophic failures. The new pumps are the same rating as the old (as far as nameplate data goes) and nothing has changed to the electrical system. The...