UMD ENME472
New Member
I am looking for advice and instructions on powering a heating element such as this <link> from let's say a rechargeable battery.
Assume the heating element requires 100 watts, therefore from the equation P=I*V the heating element would draw about 8 amps. I am interested in powering this device from a 12 volt battery either lead-acid or lithium-ion to support the portability aspects of brewing coffee, but am having trouble picking out the right battery specs for feasibility reasons.
For example a 12 volt battery at 5 Ah would generate 60 watt-hours, supplying on 6/10s of the needed power and heat, but I am unsure how long the battery would last? I'm guessing 3/4 of an hour because the battery needs some life left to recharge it? Again most of my observations are coming from assumptions.
I would like to supply enough heat to about 8 fluid ounces a water (enough for a small cup of joe) from room temp to about 195 F or 90 C. I appreciate any help and feedback. Thanks!
Assume the heating element requires 100 watts, therefore from the equation P=I*V the heating element would draw about 8 amps. I am interested in powering this device from a 12 volt battery either lead-acid or lithium-ion to support the portability aspects of brewing coffee, but am having trouble picking out the right battery specs for feasibility reasons.
For example a 12 volt battery at 5 Ah would generate 60 watt-hours, supplying on 6/10s of the needed power and heat, but I am unsure how long the battery would last? I'm guessing 3/4 of an hour because the battery needs some life left to recharge it? Again most of my observations are coming from assumptions.
I would like to supply enough heat to about 8 fluid ounces a water (enough for a small cup of joe) from room temp to about 195 F or 90 C. I appreciate any help and feedback. Thanks!