Jump to content



Featured Articles

Check out the latest featured articles.

File Library

Check out the latest downloads available in the File Library.

New Article

Product Viscosity vs. Shear

Featured File

Vertical Tank Selection

New Blog Entry

Low Flow in Pipes- posted in Ankur's blog

Dryer Heat & Mass Balance

mass balance energy balance

This topic has been archived. This means that you cannot reply to this topic.
4 replies to this topic
Share this topic:
| More

#1 Ceng67

Ceng67

    Junior Member

  • Members
  • 11 posts

Posted 07 May 2015 - 07:09 AM

Hi,

 

I want to construct a mass and energy balance on a drying unit and I'm having some difficulties. See below for details

 

 

 

 

FEED------>           (DRYER)          -------> Product             

 

seaweed:30                                              seaweed: 30         

water:70                                                   water: 0                  

tot:100 kg/hr                                             tot: 30 kg/hr            

 

 

So basically lets say hot air at 150 degrees Celsius is fed into the dryer and evaporates the water. Essentially the hot air needs to evaporate 70 kg/hr of water from the feed. The feed water content is 70% and gets reduced to 0% in the product stream. I want to perform a material balance to know the mass of air needed to dry this amount of water per hour. Lets also say the feed is initially at room temperature 25 degrees Celcius. Do I need some other variables to be known for the balance to solve? I want to find the mass of air entering assuming 0% water in the air and the mass of air leaving with x amount of water in the outlet of the air. Also what is the energy content in the air inlet and outlets, how much energy is required to dry the feed.

 

Any help would be greatly appreciated.

Thanks



#2 Ceng67

Ceng67

    Junior Member

  • Members
  • 11 posts

Posted 11 May 2015 - 01:33 AM

BUMP



#3 shan

shan

    Gold Member

  • ChE Plus Subscriber
  • 692 posts

Posted 11 May 2015 - 06:14 AM

You have to make assumptions on the relative humidity values of inlet air and outlet air to perform your calculation.



#4 breizh

breizh

    Gold Member

  • Admin
  • 6,292 posts

Posted 14 May 2015 - 12:29 AM

http://www.nzifst.or...ions/drying.htm

Consider this resource to support your work.

Hope this helps
Breizh

#5 Ceng67

Ceng67

    Junior Member

  • Members
  • 11 posts

Posted 15 May 2015 - 12:29 AM

Thank you Breizh for the resource it helped greatly. 






Similar Topics