[TRNSYS-users] Hot air flow mixer

[David BRADLEY]

Mazen,
   I am not entirely clear on whether you are controlling the total 
amount of flow going through the solar collector or whether you are 
trying to compute the fraction of the collector's known outlet flow that 
you need to mix into your exhaust gas stream in order to achieve a 
desired mixed temperature. If you are trying to control the outlet 
temperature of the collector, there are collector models available that 
will internally compute the flow rate required to achieve a desired 
temperature. If you have to known air streams that come together to 
achieve an outlet temperature, use Type33 on each air stream to get the 
air stream enthalpies then use some equations to back-calculate the 
quantity of air that you need from each stream in order to get the 
desired temperature. Don't forget about the latent effects when mixing!!
Best,
  David


On 4/18/2012 06:47, Mazen Darwish wrote:
> Dear users
> I want to model a flow mixer where hot air from a solar reciever will 
> be mixed with exhaust flue gases from the gas turbine
> before entering a HRSG , i have tried using a tee piece for mixxing 
> the flows but the outlet temperature of the mixture is below
>  the needed temperature which  is the gas exhaust temperature , can i 
> use another component to keep the temperature steady while controlling 
> the flow rate.
> Thanks
> Mazen Darwish
>
>
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> TRNSYS-users at cae.wisc.edu
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

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