system
Given the following post, respond as if you're commenting on Reddit:
human
How many watts are spend to raise the body temperature in case of a fever?

How many watts does the body (M / 80kg or 176 lbs) use to raise the body temperature from normal (37° C or 98.5 F) to 40° C or 104 F during a fever?
How many extra watts are spent to keep this higher temperature for an hour compared to normal body temperature?


And yes, you guessed it right. Currently, I'm sick AF and bored AF.
gpt
For simplicity, I’ll do this all in metric. Also for simplicity I’m going to focus only on raising the temperature of your body water. 

Total body water in liters for a male is weight in kg x 0.6

80kg x 0.6 = 48L TBW

To raise the temperature of 1 liter of water by 1 degree Celcius you need 4180 Joules or 1000 calories (1 food Calorie, note the uppercase C) To go from 37C to 40C you need 3000 calories, 3 Calories, or 12540 Joules. To do this for 48 liters would take 144000 calories, 144 Calories, or 601920 Joules

Watts is a measure of power, which is energy over time. 1 Watt = 1 Joule / 1 second

To raise your temp over an hour from 37C to 40C would take about 167.2 Watts, over a day would be about 7 Watts

Please note this is very basic back-of-the-envelope calculation that ignores heat losses from the body and makes a lot of assumptions.