Recent content by ravindrar

Suppose I have a vacuum chamber made entirely of stainless steel and it is completely enclosed on all sides. Inside the chamber, fruit slices are placed on a tray for vacuum drying. Assume the chamber is not externally heated. Instead, its outer surface is exposed only to ambient air at about...

I am working on a project on vacuum drying vegetables using IR heaters. Before winter batch time was around 3 to 4 hours now it has increased to 6 hours. Any logic behind this as though the temperature drops and RH also drop so why has the time increased?

Thank you for your help. I will go through the link and let you know. Ravindra

As posted removing moisture from 500 kg staples in shortest possible time. I feel vacuum will best option. Ravindra

I want to remove 6% moisture in one hour from 500 kg of polyester staples, which contains 12% moisture using vacuum chamber at maximum temperature of 40´´°¨ C. Can anybody help to design vessel. I can calculate pump capacity.

Thanks for suggestion. Will think over it

Thank you. I agree with you. Particularly when molecular density is 10^18. But have you seen Brian Cox's video. A large feather is falling straight though the surface area of area is very large. Thank you, I can not sort particles. I will try UV as suggested. However I am also looking for any...

I made experiment on "Free Fall". I made a conical hopper of 15 liter volume and a vacuum chamber of , installed hopper upon vacuum chamber of 65 liter volume. Fixed a 2.5" gate valve to discharge powder in vacuum chamber. Connected both, hopper and vacuum chamber to vacuum pump (63 cum/ hr) and...

Thank you. May I use negative Ion generator? What if silo is grounded?

Thanks, as you said it must be touch and not friction. Material is already dry and walls are of SS metal.

May you explain. How static electricity generated.

I did a experiment. I made a vacuum chamber with a silo on the top. Also provided the butter fly valve between vacuum chamber & silo. Filled the silo with low density powder say 0.2 gm / cc. Created vacuum in silo having powder and vacuum chamber. When I dropped this powder in vacuum chamber...