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Associate

Join Date: Oct 2010
Posts: 36

### Design Calculation

05/24/2012 12:53 AM

Dear Sir,

Material seeds are conveyed from one machine to Storage Silo . After coming from machine temp of material is 90 deg. cel. I want to cool it to 40deg cel . using jacketed type screw conveyor .

What amount of water will requied to cool it to 40 deg cel. ? What will be the length of screw conveyor ? Residence time ?

Kindly help me rgarding this calcualtion

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Guru

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing. Kettle's on.
Posts: 19628
#1

### Re: Design Calculation

05/24/2012 3:07 AM

The residence time in the conveyor is the length of the conveyor divided by the speed of the conveyor.

The length of the conveyor can be worked out from the horizontal distance between the start and end, and the height difference between start and end, and Pythagoras' Theorem.

The rest depends on the specific heat of the <...material seeds...>, the flowrates of both the <...material seeds...> and the cooling water, and the cooling water inlet temperature, which is a function of the atmospheric conditions in the locality, the cooling tower size and what ever else is connected to it.

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There was a time, not long ago, when people were smarter than their phones... (tips hat to CR4 user Harley.)
Associate

Join Date: Oct 2010
Posts: 36
#2

### Re: Design Calculation

05/24/2012 4:34 AM

Capacity of material is 3000 Kg/ hr , Inlet Temp. of water 25 deg cel.

Guru

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing. Kettle's on.
Posts: 19628
#3

### Re: Design Calculation

05/24/2012 5:13 AM

So?

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There was a time, not long ago, when people were smarter than their phones... (tips hat to CR4 user Harley.)
Guru

Join Date: May 2009
Location: Ketchikan, AK, USA
Posts: 12934
#4

### Re: Design Calculation

05/26/2012 4:30 PM

In principle, we also need to know: specific heat, thermal conductivity, and size of "seeds"; diameter of conveyor.

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Associate

Join Date: Oct 2010
Posts: 36
#5

### Re: Design Calculation

06/12/2012 7:11 AM

Gaur Seed size - < 1mm

Conveyor Dia. 300 mm

Spec. Heat - 0.49

Thermal conductivity -