dryer for vegetables

[Servicefrigo]

HI
In south of italy they uses such a maschine,the tomatos are cut in 4 parts , i-ve never see the procedure,because i've never been there.Also I now the temperature must be betwin 50*C -65*C. Too keeap the original taste.Even I taste*t 2 piecess ,is like a piece of wood at beghyning, then is very sweat like sugar.The quality of soucess is even beterr than the original fress flouwer.But how the water is throw outside the room? 850 kg/8h.This procedure is also use in medicine,maybe there is using only heating process .Somebody thould me for that we must use a vacuum procedure to trow avay the moisture air + water.

[chemi-cool]

Hi Servicefrigo.

Thats the oven I was talking about, the humidity is sucked out with a fan.

I think if dry with vacuum, it will look different and might fall apart, it depend how long you keep it in vacuum. Why not give it a try and put one tomato in a glass jar and vacuume it and see for yourself what comes out.

Chemi

[botrous]

Hey there , as for drying food i saw 2 systems , the first duting my study at the university , it was system called lypophilizator , that's deducted to dry liquids and obtain powder , such as milk and orange juice , the system is manufactured by electronicavenetta Italy and is good , it's based on a vaccum of the environement of the milk tank , then cooling it to a very low tempreture , the water evaporates and we obtain a residu of powder milk , i think that this type of systems will work with vegetables also as long as the vegetebals are crushed .
The second system was a solar food dryer that i read about in the home power magazine , but i takes a very long time to dry the food , to check about this solar system go to http://www.homepower.com/files/fooddeh.pdf

[chemi-cool]

Hi Botrous.

lypophilizator = freeze dry.

Look a few posts back and you can get the link to see how it works.

Solar vegetable drying is good fun when the sun is up and you only make a small amount.
I think that Sevicefrgo means industrial manufacturing.

Chemi

[botrous]

Thanks Chemy , i know that solar drying is for fun and for small quantities , but the freeze dry i thgough that it's different from lypophillisation . thanks for the information

[Servicefrigo]

I new , vacuum does*t do the job, alone .He must bee complementar with a deep freezing . 1 h ago I whose locking the site you recomanded
http;//home.howstuffworks.com/freeze-drying.htm
thank you ,is a very good site.

[Peter_1]

http://www.heatpumpcentre.org
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Download N1/1999 Ground source heatpumps. There is an interesting article in it "Using a heat pump dryer to dehydrate agricultural products"