[TRNSYS-users] pls give me your comments

[David BRADLEY via TRNSYS-users]

Ahmad,

   It is certainly possible. I do not know how tall your greenhouse is 
but supposing the zone height to be 15 feet a 500 m2 greenhouse has a 
volume of 80700 ft3. A 21000 cfm fan would completely replace the 
greenhouse air volume once every four minutes (approximately). I would 
therefore assume that the RH and temperature of the greenhouse would 
quickly be equal to the ambient RH and temperature.

kind regards,

  David



On 05/02/2017 12:36, ahmad abbasian via TRNSYS-users wrote:
>
> Dear All
>
> I have used a 11250 kgr/hr of air (about 21000 CFM) for a 500 m2 
> greenhouse fan and pad cooling system. there were some hours which the 
> temperature of greenhouse reaches as low as 13 ,so I have used another 
> fan with same flow rate to be turned on when the greenhouse 
> temperature is below 15 to supply outside air directly to greenhouse 
> with no cooling, and the fan of cooling pad is turned off at this 
> hours. it has solved the temperature problem but the relative humidity 
> reaches to low values. It seems wrong to me, because it occures in a 
> short time. I mean that supplying outside air to greenhouse at a short 
> period of time makes low relative humidity rapidly. Is it true? please 
> give me your comments
>
>
>
> ..............................................................................................
> Ahmad abbasianzadeh
> Solar energy Researcher
> *Harrisburg, Pensylvania*
>
>
>
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at lists.onebuilding.org
> http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org

-- 
***************************
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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