Using a pedal power device to create electricity, what effort is needed to heat a hot deep bath?

OK, this doesn't take into account the battery storage, but here goes:

A full bath holds around 90 litres of water. Let's assume that the starting temperature is 10 deg C, and the target temp. is 35 deg C. You need to raise 90 litres of water by 25 degrees C.

1 Calorie is defined as the amount of energy required to raise 1 gram of water by 1 deg C. 1 gram of water equals 1cc, or 1ml, hence it takes 1000 calories to raise 1 litre of water by 1 degree.

So, 1000 calories X 90 litres X 25 degrees = 2,250,000 calories.

Considering that the recommended daily intake of a man is only around 2,000 to 2,500 calories, you'd need to generate around 1000 times your daily intake of energy to do it, which is impossible. And that assumes 100% efficiency in all energy transfers, which is simply never going to happen.

So the short answer is, it's simply not possible. If you tried I doubt you could heat the water faster than it would cool anyway, so I don't think you could even raise the temperature at all, even if you pedalled all day!

If you're looking for a practical way to achieve this then you's have to somehow rig your bike up to drive a small generator such as you might use in a caravan with a battery in the circuit to catch any excess it shouldn't take you any more time than your regular water heater at home.You might have to pedal pretty hard tho'! If you can rig-up some sort of gear you could make it so that you have to pedal harder but slower or vice-versa.It can be done!My water heater takes about 40 mins to heat 100 litres so there's your answer about 40 minutes.

This is best considered from the point of view that the pedal is a dynamo that creates electricity which when passed through a resistor (heater) changes that electrical energy to heat energy. that said, mechanical energy (dynamo) is directly proportional to electrical energy which is directly proportional to heat energy. so, it all depends of the amount of water needed to be warmed.

This is best considered from the point of view that the pedal is a dynamo that creates electricity which when passed through a resistor (heater) changes that electrical energy to heat energy. that said, mechanical energy (dynamo) is directly proportional to electrical energy which is directly proportional to heat energy. so, it all depends of the amount of water needed to be warmed.

besides, it does not need to store the energy, but that is a minus since you will need energy to heat it and energy to charge the battery.

hope i helped you.

When you pedle it creats electricity which turns into heat but it all depends on how fast you pedal, the faster you pedal the more quicker the bath will heat up.

How hot is hot and how deep is deep?

What size is the bath?

What is the ambient temperature?

What is the starting temperature of the water?

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etc...

not much if you ain't peddling

REALY I DONT KNOW.