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The first element is way to big. The cup heater idea is close to what I want, but I would like to make it smaller. Smaller the better.
Which doesn´t help much when we got weight of an unknown fluid in ounces and temperature rise in fahrenheit. And then there is the calorie.....but briefly it takes one calorie to raise one Gram of water one degree Celsius at one atmospheric pressure.
Which doesn´t help much when we got weight of an unknown fluid in ounces and temperature rise in fahrenheit. And then there is the calorie..
Is the actual thermal 12v coffee cups too large? they are insulated and thermostatically controlled. You maybe could tweek the temperature/thermostat to close to what you need.The first element is way to big. The cup heater idea is close to what I want, but I would like to make it smaller. Smaller the better.
And there I thought that BTU is a unit of energy, not power.0.25 pounds of water raised 40F takes 0.25 x 40 = 10 btu = 3 Watts
Here is a calculator. When I ran it it came out 80 watts for 2 minutes. Longer takes less of course.Hello, I'm trying to make a small heating element to warm up about 4oz of fluid to 100-110 degrees Fahrenheit in a decent amount of time(2 min max). I would like to keep the battery/batteries small (9v's aa's or a custom lipo ) Any ideas to make this work?
That calculator rounds it off severly, try typing in 113 liters instead of 0.113, you will get that 2 minutes at 100W, and 2.5 minutes at 80W with 100% efficiency.Here is a calculator. When I ran it it came out 80 watts for 2 minutes. Longer takes less of course.
**broken link removed**
If I use .13 liters, 18.3C to 40.5C and 80 watts I get 2 minutes. 130 liters 2282 minutes. So the error must be about 10% at the low volume.That calculator rounds it off severly, try typing in 113 liters instead of 0.113, you will get that 2 minutes at 100W, and 2.5 minutes at 80W with 100% efficiency.