Abdullah
Member

in Formulating

Is there any theory or way to calculate how much water has evaporated during lotion manufacturing if the work temperature is above 60°c?

How do you guys calculate yours?

How do you guys calculate yours?

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To find the evaporation rate of water i did an experiment. I heated 200g water to 60°c. After 5 minutes the temperature dropped to 57°c and 2g water evaporated.

Is this the correct way to evaluate?

I did the experiment on 200g water to find the evaporation rate of water but at 200kg the evaporation rate is far less than 1% at 5 minutes. So this was not helpful 😃

You'll have to make a big batch 200kg and weigh it before and after. Do that about 30 times and you'll get an answer that reflects the normal distribution of the process.

Also for 50kg and above i use inline homogenizer so some of them would be inside the pipe, although can fill the pipe and check how much material fits there.

Another problem is the evaporation rate is different for different sizes.

For smaller batches the evaporation rate is higher than large batches so I can't guess it from measuring it.