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What is the best way to heat water fast? 1
- Thread starter Watco
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Montemayor
Chemical
IRstuff is exactly correct. We don't know a lot of things about what you ask. For example, are you dealing with static water or steady-state water flow? I can answer the basic question with the basic truth:
The fastest way to heat water is to sparge live steam directly into it.
However, this may not be acceptable to you. Everything has a trade off and sparging has its own tradeoffs as well. For all I know you may just be trying to warm up a cup of coffee. Nevertheless, I believe my statement to be true.
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More information:
I am trying to heat water in a coffee pot, with electricity, however we want to have as low a temperature as possible at the heating element and still get the water to 180F or so. We thought that running the cold water through the inside of a hollow heating element would work well. Do you think this will work?
I am trying to heat water in a coffee pot, with electricity, however we want to have as low a temperature as possible at the heating element and still get the water to 180F or so. We thought that running the cold water through the inside of a hollow heating element would work well. Do you think this will work?
Yes, it seems like it would be possible to heat water that is flowing through a tube that also serves as the heating element.
It does not seem like that would be efficient or wise, because:
Only half of your heater element's surface area is contacting the water. You could of course insulate the outside.
The water would be directly in contact with an electrically live surface.
The properties of materials that make good pipes make bad resistance heaters.
It does not seem like that would be efficient or wise, because:
Only half of your heater element's surface area is contacting the water. You could of course insulate the outside.
The water would be directly in contact with an electrically live surface.
The properties of materials that make good pipes make bad resistance heaters.
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- #9
keepinitcool
Mechanical
I don't see how the metal tube would be the heating element? From my point of view, the tube would be a water pipe, such as copper, which is covered by the resistive electrical heating element (electrically insulated from each other) which is then covered with insulation.
Oven heating element, from the inside to the outside:
Wire: Conducts electricity and gets hot, as dictated by Ohm's law.
Ceramic, glass or other refractory fill: Selected to be an electrical insulator, but a good conductor of heat.
Outer metal sheath: To provide stiffness and protect the other two components.
Wire: Conducts electricity and gets hot, as dictated by Ohm's law.
Ceramic, glass or other refractory fill: Selected to be an electrical insulator, but a good conductor of heat.
Outer metal sheath: To provide stiffness and protect the other two components.
Never mind the mumbo-jumbo about what you think is the solution. Newton's law requires that you can a temperature delta to cause heating. You have a finite amount of heat energy that must be transferred in a given time. The lower the heater temperature, the longer the contact with the heater must be.
You seem to be thinking that you have some sort of killer product, yet you've done nothing or know very little about the problem that you seem to claim to have a solution for.
Or is this for school?
TTFN
You seem to be thinking that you have some sort of killer product, yet you've done nothing or know very little about the problem that you seem to claim to have a solution for.
Or is this for school?
TTFN
freedomtech
Aerospace
Watco is asking about the best way to heat water fast, specifically, heat approx 1.5 Liters to 90 deg C in approx 3 minutes with starting temp around 7 deg C worst case. Ideally heat it without a tank. Heat incoming water from inlet valve as needed until 1.5 Liters of heated water is reached.
and later...
If you don't have a tank, where will 1.5 liters of hot water be kept?
Does it seem to anyone else that freedomtech and Watco must be lab partners?
Have you figured out how much energy you need to heat 1.5 l of water 83 degrees C yet? That would be a good place to start.
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