Band/Drum Heater

[CW3]

I have a 15.5-gallon SS304 drum that has an O.D. of 16.125".

I want to fill it with 10-gallons of 70F water and heat it to 200F using a 120V _____watt band/drum heater.

Like to accomplish this in 1-hour.

Drum is atmospheric pressure.

Can somebody fill in the blank ________watt..??

Thanks.

CW3

 

[mcgyvr]

http://www.thermalinc.com/math/roundtank.htm

 

[vc66]

Using Q=m*(Cp)*(deltaT) is probably the easiest for a quick approximation.

Mass of water for 15.5 Gallons = Approx. 60 kg
Cp of Water = Approximately 4.187 kJ/kgK
DeltaT = Approx. 72 K

Q= 18 kJ

You want watts so multiply by 1000 to get joules, then divide by 3600 to get J/s (watts).

I get around 5 kW.

I used the program that mcgyvr put up and I get 6kW so I may be a little off.

V

 

[Compositepro]

A water heater tank from the hardware store will work better and cost less than your band heater, let alone a stainless drum. If you are using 120 volts so you can use a wall plug you will be limited to 1500 watts or so.

As it happens a heater designed for 4500 watts at 240 volts, which is fairly common on domestic water heaters, will give 1500 watts at 120 volts.

 

[CW3]

I have used a 1500W "water heater element" as found in standard residential water heaters. It heats the water just fine. I was looking at options to where I didn't have to go with an internal element. The more I think about it, the more I am inclined to work around that issue. Budgetarily, can't beat the $8 HomeDepot element........

Thanks.

 

[mcgyvr]

3700 watts is what you need for a 1 hour heating time.

vc66 used 15 gallons (size of the bucket). You only fill the bucket with 10 gallons or water.

 

[vc66]

Good call, mcgyvr.

V