Pumps Definition and 114 Threads

Cavitation in pumps is a major problem. How can I be sure to minimize the damage it does? Is it correct that the worse case is a pump that gets much less flow and resistance that it can handle? These are not very big pumps, none more than 10 l/s.

hello all , i need some help about rotary water pumps (centrifugal) design , mechanism , ... can anyone help me please ?

Are there natural gas powered heat pumps? My friend says yes, but the science is puzzling to me if so. Easy to understand burning gas to make heat, but what economical home system can make cold air from hot burning gas unless the heat turns a dynamo that makes electricity that powers the AC...

Ok I remember watching a video when I was twelve of this guy who used basically a refrigerator in reverse to create electrical energy from heat energy in outside air to power a house. Freon was run through black heat collecting panels, then through a compressor to make it hot. The heat energy...

Hey guys Anyone knows a good calculator for condenser, evaporator, or heat pump design? common unknown parameters would be number of passes, or length of columns, depth or rows... Thnks

Homework Statement Homework Equations I suppose the energy density equation applies here: (P2-P1) + pg(y2-y1) + 1/2p(v2^2 - v1^2) = Epump/vol - IR and I = Av The Attempt at a Solution My initial thought was that the current is the same. But then, since current is Av...

Hi everyone, I was hoping to ask a thermodynamics problem, specificially one about heat pumps and coeffiecent of performance. I am wondering if I am missing something. I am given that heat pump is heat a building. Inside temperature is to be maintained at 22 degree celcius, outside is...

Paris has many large and impressive fountains, as do many large cities sited on mostly flat topography, and I would like to know how these fountains operated so impressively before the advent of electric pumps? I understand gravity pressure concepts such the one used in the Hearst Castle water...

Hello, have you heard of integrated heat pumps? What is the essence of such an "integrated" heat pump? I mean how does it save energy? And what does the term "integrated" mean? Please kindly help.

Show that the relationship betwee efficiency (n) of a Carnot engine and the coefficient of performance (w) of the same engine when operated as a refrigerator is given by nw= Tc/Th Is a Carnot engine whose efficiency is very high particularly suited as a refrigerator? Why? Well we know that...

Heat pumps and shape-memory alloys motor... Hi. Would it be possible to get some electricity from a heat pump and shape-memory alloys motor/engins with a generator? A heat pump use 1 kW and give you 3-5 kW heat. Would it be possible to use shape-memory alloys motor and a generator to...

Hello.. I am attempting to create a "lever arm" to lift things up... Using 1 or 2 Servos. How can I achieve it with Neumatics, Pumps, and/or suspension? Are they better than Gear Trains? The objects are some bottles and things around 2 lbs. Thanks

Will u please help me in telling me how do hydraulic doble-acting pumps work EXACTLY and the explanation of the spools function.

pumps r compressors? a pump is used to increase the head of the fluid and a compressor is used to increase the pressure of the fluid...this pressure head is a form of energy and is transferable to other form [say increase in vertical height the fluid is raised] so can i use a pump and a...