# Amount of energy required to evaporate 1 liter if water through scheffler dish

1. May 20, 2010

### ashishgourav

Hi
Our company is planning to setup a scheffler system to evaporate 9 lakh liters of "waste water" per day.

I just want to know that how much energy would it take to evaporate 1 liter of water.

According to "latent heat of vaporization of water" it would take around 0.62 kWh/liter but I'm not sure...please help!

2. May 20, 2010

### minger

From an ideal standpoint, it will be both heat of vaporization plus the heat required to raise the water to 100°C. The only google hit I can find on Scheffler water systems is this thread, so I can't help you any more.

3. May 20, 2010

### ashishgourav

I know that "both heat of vaporization plus the heat required to raise the water to 100°C" but the energy required to raise the water to 100°C contributes just 5% of the total requirement

4. May 21, 2010

### PaulS1950

If that is true then it will take 20(1000 calories) times the number of degrees (100-T beginning)
or
20000 (100 - temp of waste water in celsius) in calories
If you take that number and multiply by 3.968 you will have BTUs
You can multiply BTUs by 0.000293 for kilowatt hours.